{ "default-CC":
  { "vars": ["defaults-transition"]
  , "imports": {"list_provider": ["./", "..", "field_list_provider"]}
  , "expression":
    { "type": "let*"
    , "bindings":
      [ ["fieldname", "defaults"]
      , ["provider", "CC"]
      , ["transition", {"type": "var", "name": "defaults-transition"}]
      , ["CC", {"type": "CALL_EXPRESSION", "name": "list_provider"}]
      , [ "CC"
        , { "type": "if"
          , "cond": {"type": "var", "name": "CC"}
          , "then": {"type": "var", "name": "CC"}
          , "else": ["cc"]
          }
        ]
      ]
    , "body": {"type": "var", "name": "CC"}
    }
  }
, "default-CXX":
  { "vars": ["defaults-transition"]
  , "imports": {"list_provider": ["./", "..", "field_list_provider"]}
  , "expression":
    { "type": "let*"
    , "bindings":
      [ ["fieldname", "defaults"]
      , ["provider", "CXX"]
      , ["transition", {"type": "var", "name": "defaults-transition"}]
      , ["CXX", {"type": "CALL_EXPRESSION", "name": "list_provider"}]
      , [ "CXX"
        , { "type": "if"
          , "cond": {"type": "var", "name": "CXX"}
          , "then": {"type": "var", "name": "CXX"}
          , "else": ["c++"]
          }
        ]
      ]
    , "body": {"type": "var", "name": "CXX"}
    }
  }
, "default-AR":
  { "vars": ["defaults-transition"]
  , "imports": {"list_provider": ["./", "..", "field_list_provider"]}
  , "expression":
    { "type": "let*"
    , "bindings":
      [ ["fieldname", "defaults"]
      , ["provider", "AR"]
      , ["transition", {"type": "var", "name": "defaults-transition"}]
      , ["AR", {"type": "CALL_EXPRESSION", "name": "list_provider"}]
      , [ "AR"
        , { "type": "if"
          , "cond": {"type": "var", "name": "AR"}
          , "then": {"type": "var", "name": "AR"}
          , "else": ["ar"]
          }
        ]
      ]
    , "body": {"type": "var", "name": "AR"}
    }
  }
, "default-INCLUDE_SCANNER":
  { "vars": ["defaults-transition"]
  , "imports": {"map_provider": ["./", "..", "field_map_provider"]}
  , "expression":
    { "type": "let*"
    , "bindings":
      [ ["fieldname", "defaults"]
      , ["provider", "INCLUDE_SCANNER"]
      , ["transition", {"type": "var", "name": "defaults-transition"}]
      ]
    , "body": {"type": "CALL_EXPRESSION", "name": "map_provider"}
    }
  }
, "default-DWP":
  { "vars": ["defaults-transition"]
  , "imports": {"list_provider": ["./", "..", "field_list_provider"]}
  , "expression":
    { "type": "let*"
    , "bindings":
      [ ["fieldname", "defaults"]
      , ["provider", "DWP"]
      , ["transition", {"type": "var", "name": "defaults-transition"}]
      , ["DWP", {"type": "CALL_EXPRESSION", "name": "list_provider"}]
      , [ "DWP"
        , { "type": "if"
          , "cond": {"type": "var", "name": "DWP"}
          , "then": {"type": "var", "name": "DWP"}
          , "else": ["dwp"]
          }
        ]
      ]
    , "body": {"type": "var", "name": "DWP"}
    }
  }
, "default-ARFLAGS":
  { "vars": ["defaults-transition"]
  , "imports": {"list_provider": ["./", "..", "field_list_provider"]}
  , "expression":
    { "type": "let*"
    , "bindings":
      [ ["fieldname", "defaults"]
      , ["provider", "ARFLAGS"]
      , ["transition", {"type": "var", "name": "defaults-transition"}]
      , ["ARFLAGS", {"type": "CALL_EXPRESSION", "name": "list_provider"}]
      , [ "ARFLAGS"
        , { "type": "if"
          , "cond": {"type": "var", "name": "ARFLAGS"}
          , "then": {"type": "var", "name": "ARFLAGS"}
          , "else": ["cqs"]
          }
        ]
      ]
    , "body": {"type": "var", "name": "ARFLAGS"}
    }
  }
, "default-CFLAGS":
  { "vars": ["defaults-transition"]
  , "imports": {"list_provider": ["./", "..", "field_list_provider"]}
  , "expression":
    { "type": "let*"
    , "bindings":
      [ ["fieldname", "defaults"]
      , ["provider", "CFLAGS"]
      , ["transition", {"type": "var", "name": "defaults-transition"}]
      ]
    , "body": {"type": "CALL_EXPRESSION", "name": "list_provider"}
    }
  }
, "default-CXXFLAGS":
  { "vars": ["defaults-transition"]
  , "imports": {"list_provider": ["./", "..", "field_list_provider"]}
  , "expression":
    { "type": "let*"
    , "bindings":
      [ ["fieldname", "defaults"]
      , ["provider", "CXXFLAGS"]
      , ["transition", {"type": "var", "name": "defaults-transition"}]
      ]
    , "body": {"type": "CALL_EXPRESSION", "name": "list_provider"}
    }
  }
, "default-LDFLAGS":
  { "vars": ["defaults-transition"]
  , "imports": {"list_provider": ["./", "..", "field_list_provider"]}
  , "expression":
    { "type": "let*"
    , "bindings":
      [ ["fieldname", "defaults"]
      , ["provider", "LDFLAGS"]
      , ["transition", {"type": "var", "name": "defaults-transition"}]
      ]
    , "body": {"type": "CALL_EXPRESSION", "name": "list_provider"}
    }
  }
, "default-ENV":
  { "vars": ["defaults-transition"]
  , "imports": {"map_provider": ["./", "..", "field_map_provider"]}
  , "expression":
    { "type": "let*"
    , "bindings":
      [ ["fieldname", "defaults"]
      , ["provider", "ENV"]
      , ["transition", {"type": "var", "name": "defaults-transition"}]
      , ["default", {"type": "empty_map"}]
      ]
    , "body": {"type": "CALL_EXPRESSION", "name": "map_provider"}
    }
  }
, "default-PATH":
  { "vars": ["defaults-transition"]
  , "imports": {"list_provider": ["./", "..", "field_list_provider"]}
  , "expression":
    { "type": "let*"
    , "bindings":
      [ ["fieldname", "defaults"]
      , ["provider", "PATH"]
      , ["transition", {"type": "var", "name": "defaults-transition"}]
      ]
    , "body": {"type": "CALL_EXPRESSION", "name": "list_provider"}
    }
  }
, "default-TOOLCHAIN":
  { "vars": ["defaults-transition"]
  , "imports": {"map_provider": ["./", "..", "field_map_provider"]}
  , "expression":
    { "type": "let*"
    , "bindings":
      [ ["fieldname", "defaults"]
      , ["provider", "TOOLCHAIN"]
      , ["transition", {"type": "var", "name": "defaults-transition"}]
      , ["default", {"type": "empty_map"}]
      ]
    , "body": {"type": "CALL_EXPRESSION", "name": "map_provider"}
    }
  }
, "default-NON_SYSTEM_TOOLS":
  { "vars": ["defaults-transition"]
  , "expression":
    { "type": "map_union"
    , "$1":
      { "type": "foreach"
      , "var": "x"
      , "range": {"type": "FIELD", "name": "defaults"}
      , "body":
        { "type": "DEP_PROVIDES"
        , "dep": {"type": "var", "name": "x"}
        , "provider": "NON_SYSTEM_TOOLS"
        , "transition":
          { "type": "var"
          , "name": "defaults-transition"
          , "default": {"type": "empty_map"}
          }
        , "default": {"type": "empty_map"}
        }
      }
    }
  }
, "defaults-base-provides-list":
  { "doc": ["Query list of providers from 'base' targets"]
  , "vars": ["provider", "default"]
  , "vars_doc":
    { "provider": ["The name of the provider in the provides map."]
    , "default": ["The default if provider is missing (default: [])."]
    }
  , "imports": {"provider_list": ["./", "..", "field_provider_list"]}
  , "expression":
    { "type": "let*"
    , "bindings": [["fieldname", "base"]]
    , "body": {"type": "CALL_EXPRESSION", "name": "provider_list"}
    }
  }
, "defaults-base-provides-++":
  { "doc": ["Query flattend list of providers from 'base' targets"]
  , "vars": ["provider", "default"]
  , "vars_doc":
    { "provider": ["The name of the provider in the provides map."]
    , "default": ["The default if provider is missing (default: [])."]
    }
  , "imports": {"base-provides-list": "defaults-base-provides-list"}
  , "expression":
    { "type": "++"
    , "$1": {"type": "CALL_EXPRESSION", "name": "base-provides-list"}
    }
  }
, "defaults-base-provides":
  { "doc": ["Query provider from 'base' targets (last wins)"]
  , "vars": ["provider", "default"]
  , "vars_doc":
    { "provider": ["The name of the provider in the provides map."]
    , "default": ["The default if provider is missing (default: [])."]
    }
  , "imports": {"base-provides-list": "defaults-base-provides-list"}
  , "expression":
    { "type": "foldl"
    , "var": "next"
    , "start": {"type": "var", "name": "default", "default": []}
    , "accum_var": "curr"
    , "range": {"type": "CALL_EXPRESSION", "name": "base-provides-list"}
    , "body":
      { "type": "if"
      , "cond": {"type": "var", "name": "next"}
      , "then": {"type": "var", "name": "next"}
      , "else": {"type": "var", "name": "curr"}
      }
    }
  }
, "debug-deps":
  { "doc":
    ["Collect debug dependencies (sources/headers) from given target_fields"]
  , "vars":
    [ "deps-provider"
    , "deps-fieldnames"
    , "deps-transition"
    , "modified-transitions"
    ]
  , "vars_doc":
    { "deps-provider": ["Name of provider to use (debug-srcs/debug-hdrs)."]
    , "deps-fieldnames":
      ["List of target_field names to collect dependencies from."]
    , "deps-transition":
      ["The optional configuration transition for the targets."]
    , "modified-transitions":
      ["Map telling fields that need to be transitioned differently"]
    }
  , "imports": {"provider_list": ["./", "..", "field_provider_list"]}
  , "expression":
    { "type": "map_union"
    , "$1":
      { "type": "++"
      , "$1":
        { "type": "foreach"
        , "var": "fieldname"
        , "range": {"type": "var", "name": "deps-fieldnames"}
        , "body":
          { "type": "++"
          , "$1":
            { "type": "let*"
            , "bindings":
              [ ["provider", {"type": "var", "name": "deps-provider"}]
              , [ "transition"
                , { "type": "lookup"
                  , "map":
                    { "type": "var"
                    , "name": "modified-transitions"
                    , "default": {"type": "empty_map"}
                    }
                  , "key": {"type": "var", "name": "fieldname"}
                  , "default": {"type": "var", "name": "deps-transition"}
                  }
                ]
              , ["default", {"type": "empty_map"}]
              ]
            , "body": [{"type": "CALL_EXPRESSION", "name": "provider_list"}]
            }
          }
        }
      }
    }
  }
, "compile-deps":
  { "doc": ["Collect compile dependencies (headers) from given target_fields"]
  , "vars":
    [ "deps-fieldnames"
    , "deps-transition"
    , "modified-transitions"
    , "component-fieldnames"
    ]
  , "vars_doc":
    { "deps-fieldnames":
      ["List of target_field names to collect dependencies from."]
    , "deps-transition":
      ["The optional configuration transition for the targets."]
    , "modified-transitions":
      ["Map telling fields that need to be transitioned differently"]
    }
  , "imports":
    { "runfiles_list": ["./", "..", "field_runfiles_list"]
    , "provider_list": ["./", "..", "field_provider_list"]
    }
  , "expression":
    { "type": "disjoint_map_union"
    , "$1":
      { "type": "++"
      , "$1":
        [ { "type": "++"
          , "$1":
            { "type": "foreach"
            , "var": "fieldname"
            , "range":
              { "type": "++"
              , "$1":
                [ {"type": "var", "name": "deps-fieldnames"}
                , { "type": "var"
                  , "name": "component-fieldnames"
                  , "default": []
                  }
                ]
              }
            , "body":
              { "type": "let*"
              , "bindings":
                [ ["provider", "compile-deps"]
                , [ "transition"
                  , { "type": "lookup"
                    , "map":
                      { "type": "var"
                      , "name": "modified-transitions"
                      , "default": {"type": "empty_map"}
                      }
                    , "key": {"type": "var", "name": "fieldname"}
                    , "default": {"type": "var", "name": "deps-transition"}
                    }
                  ]
                , ["default", {"type": "empty_map"}]
                ]
              , "body": {"type": "CALL_EXPRESSION", "name": "provider_list"}
              }
            }
          }
        , { "type": "++"
          , "$1":
            { "type": "foreach"
            , "var": "fieldname"
            , "range": {"type": "var", "name": "deps-fieldnames"}
            , "body":
              { "type": "let*"
              , "bindings":
                [ [ "transition"
                  , { "type": "lookup"
                    , "map":
                      { "type": "var"
                      , "name": "modified-transitions"
                      , "default": {"type": "empty_map"}
                      }
                    , "key": {"type": "var", "name": "fieldname"}
                    , "default": {"type": "var", "name": "deps-transition"}
                    }
                  ]
                , ["default", {"type": "empty_map"}]
                ]
              , "body": {"type": "CALL_EXPRESSION", "name": "runfiles_list"}
              }
            }
          }
        ]
      }
    }
  }
, "compile-args-deps":
  { "doc": ["Collect compile arguments from given target_fields"]
  , "vars": ["deps-fieldnames", "deps-transition", "modified-transitions"]
  , "vars_doc":
    { "deps-fieldnames":
      ["List of target_field names to collect arguments from."]
    , "deps-transition":
      ["The optional configuration transition for the targets."]
    , "modified-transitions":
      ["Map telling fields that need to be transitioned differently"]
    }
  , "imports": {"list_provider": ["./", "..", "field_list_provider"]}
  , "expression":
    { "type": "nub_right"
    , "$1":
      { "type": "++"
      , "$1":
        { "type": "foreach"
        , "var": "fieldname"
        , "range": {"type": "var", "name": "deps-fieldnames"}
        , "body":
          { "type": "let*"
          , "bindings":
            [ ["provider", "compile-args"]
            , [ "transition"
              , { "type": "lookup"
                , "map":
                  { "type": "var"
                  , "name": "modified-transitions"
                  , "default": {"type": "empty_map"}
                  }
                , "key": {"type": "var", "name": "fieldname"}
                , "default": {"type": "var", "name": "deps-transition"}
                }
              ]
            ]
          , "body": {"type": "CALL_EXPRESSION", "name": "list_provider"}
          }
        }
      }
    }
  }
, "link-deps":
  { "doc": ["Collect link dependencies (libraries) from given target_fields"]
  , "vars":
    [ "deps-fieldnames"
    , "deps-transition"
    , "modified-transitions"
    , "component-fieldnames"
    ]
  , "vars_doc":
    { "deps-fieldnames":
      ["List of target_field names to collect dependencies from."]
    , "deps-transition":
      ["The optional configuration transition for the targets."]
    , "modified-transitions":
      ["Map telling fields that need to be transitioned differently"]
    }
  , "imports":
    { "artifacts_list": ["./", "..", "field_artifacts_list"]
    , "provider_list": ["./", "..", "field_provider_list"]
    }
  , "expression":
    { "type": "let*"
    , "bindings":
      [ [ "drop_artifacts"
        , { "type": "set"
          , "$1":
            {"type": "var", "name": "component-fieldnames", "default": []}
          }
        ]
      ]
    , "body":
      { "type": "disjoint_map_union"
      , "$1":
        { "type": "++"
        , "$1":
          { "type": "foreach"
          , "var": "fieldname"
          , "range": {"type": "var", "name": "deps-fieldnames"}
          , "body":
            { "type": "++"
            , "$1":
              { "type": "let*"
              , "bindings":
                [ ["provider", "link-deps"]
                , ["default", {"type": "empty_map"}]
                , [ "transition"
                  , { "type": "lookup"
                    , "map":
                      { "type": "var"
                      , "name": "modified-transitions"
                      , "default": {"type": "empty_map"}
                      }
                    , "key": {"type": "var", "name": "fieldname"}
                    , "default": {"type": "var", "name": "deps-transition"}
                    }
                  ]
                ]
              , "body":
                [ {"type": "CALL_EXPRESSION", "name": "provider_list"}
                , { "type": "if"
                  , "cond":
                    { "type": "lookup"
                    , "map": {"type": "var", "name": "drop_artifacts"}
                    , "key": {"type": "var", "name": "fieldname"}
                    }
                  , "then": []
                  , "else":
                    {"type": "CALL_EXPRESSION", "name": "artifacts_list"}
                  }
                ]
              }
            }
          }
        }
      }
    }
  }
, "link-args-deps":
  { "doc": ["Collect linker arguments from given target_fields"]
  , "vars": ["deps-fieldnames", "deps-transition", "modified-transitions"]
  , "vars_doc":
    { "deps-fieldnames":
      ["List of target_field names to collect arguments from."]
    , "deps-transition":
      ["The optional configuration transition for the targets."]
    , "modified-transitions":
      ["Map telling fields that need to be transitioned differently"]
    }
  , "imports": {"list_provider": ["./", "..", "field_list_provider"]}
  , "expression":
    { "type": "nub_right"
    , "$1":
      { "type": "++"
      , "$1":
        { "type": "foreach"
        , "var": "fieldname"
        , "range": {"type": "var", "name": "deps-fieldnames"}
        , "body":
          { "type": "let*"
          , "bindings":
            [ ["provider", "link-args"]
            , [ "transition"
              , { "type": "lookup"
                , "map":
                  { "type": "var"
                  , "name": "modified-transitions"
                  , "default": {"type": "empty_map"}
                  }
                , "key": {"type": "var", "name": "fieldname"}
                , "default": {"type": "var", "name": "deps-transition"}
                }
              ]
            ]
          , "body": {"type": "CALL_EXPRESSION", "name": "list_provider"}
          }
        }
      }
    }
  }
, "run-libs-deps":
  { "doc": ["Collect runtime libraries from given target_fields"]
  , "vars": ["deps-fieldnames", "deps-transition", "modified-transitions"]
  , "vars_doc":
    { "deps-fieldnames":
      ["List of target_field names to collect dependencies from."]
    , "deps-transition":
      ["The optional configuration transition for the targets."]
    , "modified-transitions":
      ["Map telling fields that need to be transitioned differently"]
    }
  , "imports": {"provider_list": ["./", "..", "field_provider_list"]}
  , "expression":
    { "type": "to_subdir"
    , "flat": true
    , "$1":
      { "type": "disjoint_map_union"
      , "$1":
        { "type": "++"
        , "$1":
          { "type": "foreach"
          , "var": "fieldname"
          , "range": {"type": "var", "name": "deps-fieldnames"}
          , "body":
            { "type": "let*"
            , "bindings":
              [ ["provider", "run-libs"]
              , ["default", {"type": "empty_map"}]
              , [ "transition"
                , { "type": "lookup"
                  , "map":
                    { "type": "var"
                    , "name": "modified-transitions"
                    , "default": {"type": "empty_map"}
                    }
                  , "key": {"type": "var", "name": "fieldname"}
                  , "default": {"type": "var", "name": "deps-transition"}
                  }
                ]
              ]
            , "body": {"type": "CALL_EXPRESSION", "name": "provider_list"}
            }
          }
        }
      }
    }
  }
, "run-libs-args-deps":
  { "doc":
    ["Collect runtime libraries link arguments from given target_fields"]
  , "vars": ["deps-fieldnames", "deps-transition", "modified-transitions"]
  , "vars_doc":
    { "deps-fieldnames":
      ["List of target_field names to collect arguments from."]
    , "deps-transition":
      ["The optional configuration transition for the targets."]
    , "modified-transitions":
      ["Map telling fields that need to be transitioned differently"]
    }
  , "imports": {"list_provider": ["./", "..", "field_list_provider"]}
  , "expression":
    { "type": "nub_right"
    , "$1":
      { "type": "++"
      , "$1":
        { "type": "foreach"
        , "var": "fieldname"
        , "range": {"type": "var", "name": "deps-fieldnames"}
        , "body":
          { "type": "let*"
          , "bindings":
            [ ["provider", "run-libs-args"]
            , [ "transition"
              , { "type": "lookup"
                , "map":
                  { "type": "var"
                  , "name": "modified-transitions"
                  , "default": {"type": "empty_map"}
                  }
                , "key": {"type": "var", "name": "fieldname"}
                , "default": {"type": "var", "name": "deps-transition"}
                }
              ]
            ]
          , "body": {"type": "CALL_EXPRESSION", "name": "list_provider"}
          }
        }
      }
    }
  }
, "pkg-map-provider-deps":
  { "doc": ["Collect maps from provider \"package\" for given target_fields"]
  , "vars":
    ["pkg-key", "deps-fieldnames", "deps-transition", "modified-transitions"]
  , "vars_doc":
    { "pkg-key": ["Key to lookup in provider \"package\"."]
    , "deps-fieldnames": ["List of target_field names to collect maps from."]
    , "deps-transition":
      ["The optional configuration transition for the targets."]
    , "modified-transitions":
      ["Map telling fields that need to be transitioned differently"]
    }
  , "imports": {"provider_list": ["./", "..", "field_provider_list"]}
  , "expression":
    { "type": "disjoint_map_union"
    , "$1":
      { "type": "++"
      , "$1":
        { "type": "foreach"
        , "var": "fieldname"
        , "range": {"type": "var", "name": "deps-fieldnames"}
        , "body":
          { "type": "let*"
          , "bindings":
            [ ["provider", "package"]
            , ["default", {"type": "empty_map"}]
            , [ "transition"
              , { "type": "lookup"
                , "map":
                  { "type": "var"
                  , "name": "modified-transitions"
                  , "default": {"type": "empty_map"}
                  }
                , "key": {"type": "var", "name": "fieldname"}
                , "default": {"type": "var", "name": "deps-transition"}
                }
              ]
            ]
          , "body":
            { "type": "foreach"
            , "range": {"type": "CALL_EXPRESSION", "name": "provider_list"}
            , "var": "map"
            , "body":
              { "type": "lookup"
              , "key": {"type": "var", "name": "pkg-key"}
              , "map": {"type": "var", "name": "map"}
              , "default": {"type": "empty_map"}
              }
            }
          }
        }
      }
    }
  }
, "cflags-files-deps":
  { "doc": ["Collect cflags files from target_fields"]
  , "vars": ["deps-fieldnames", "deps-transition", "modified-transitions"]
  , "vars_doc":
    { "deps-fieldnames": ["List of target_field names to collect files from."]
    , "deps-transition":
      ["The optional configuration transition for the targets."]
    , "modified-transitions":
      ["Map telling fields that need to be transitioned differently"]
    }
  , "imports": {"pkg-provider": "pkg-map-provider-deps"}
  , "expression":
    { "type": "let*"
    , "bindings": [["pkg-key", "cflags-files"]]
    , "body": {"type": "CALL_EXPRESSION", "name": "pkg-provider"}
    }
  }
, "ldflags-files-deps":
  { "doc": ["Collect cflags files from target_fields"]
  , "vars": ["deps-fieldnames", "deps-transition", "modified-transitions"]
  , "vars_doc":
    { "deps-fieldnames": ["List of target_field names to collect files from."]
    , "deps-transition":
      ["The optional configuration transition for the targets."]
    , "modified-transitions":
      ["Map telling fields that need to be transitioned differently"]
    }
  , "imports": {"pkg-provider": "pkg-map-provider-deps"}
  , "expression":
    { "type": "let*"
    , "bindings": [["pkg-key", "ldflags-files"]]
    , "body": {"type": "CALL_EXPRESSION", "name": "pkg-provider"}
    }
  }
, "pkg-prefix-lib-paths":
  { "doc": ["Detect ldflags referring to local libs and prefix them."]
  , "vars": ["pkg-ldflags", "pkg-libs", "flat-libs", "lib-prefix"]
  , "expression":
    { "type": "let*"
    , "bindings":
      [ [ "libs set"
        , { "type": "set"
          , "$1": {"type": "keys", "$1": {"type": "var", "name": "pkg-libs"}}
          }
        ]
      ]
    , "body":
      { "type": "foreach"
      , "var": "item"
      , "range": {"type": "var", "name": "pkg-ldflags"}
      , "body":
        { "type": "if"
        , "cond":
          { "type": "lookup"
          , "key": {"type": "var", "name": "item"}
          , "map": {"type": "var", "name": "libs set"}
          }
        , "then":
          { "type": "join"
          , "$1":
            { "type": "if"
            , "cond": {"type": "var", "name": "flat-libs"}
            , "then":
              [ "-l:"
              , {"type": "basename", "$1": {"type": "var", "name": "item"}}
              ]
            , "else":
              [ {"type": "var", "name": "lib-prefix"}
              , "/"
              , {"type": "var", "name": "item"}
              ]
            }
          }
        , "else": {"type": "var", "name": "item"}
        }
      }
    }
  }
, "pkg-prefix-flag-paths":
  { "doc": ["Detect flags referring to local flag files and prefix them."]
  , "vars": ["flags", "pkg-flag-files", "flag-prefix"]
  , "expression":
    { "type": "let*"
    , "bindings":
      [ [ "pkg-flag-files unprefix map"
        , { "type": "map_union"
          , "$1":
            { "type": "foreach"
            , "var": "name"
            , "range":
              {"type": "keys", "$1": {"type": "var", "name": "pkg-flag-files"}}
            , "body":
              { "type": "singleton_map"
              , "key":
                {"type": "join", "$1": ["@", {"type": "var", "name": "name"}]}
              , "value": {"type": "var", "name": "name"}
              }
            }
          }
        ]
      ]
    , "body":
      { "type": "foreach"
      , "var": "item"
      , "range": {"type": "var", "name": "flags"}
      , "body":
        { "type": "let*"
        , "bindings":
          [ [ "flag-file"
            , { "type": "lookup"
              , "map": {"type": "var", "name": "pkg-flag-files unprefix map"}
              , "key": {"type": "var", "name": "item"}
              }
            ]
          ]
        , "body":
          { "type": "if"
          , "cond": {"type": "var", "name": "flag-file"}
          , "then":
            { "type": "join"
            , "$1":
              [ "@"
              , {"type": "var", "name": "flag-prefix"}
              , "/"
              , {"type": "var", "name": "flag-file"}
              ]
            }
          , "else": {"type": "var", "name": "item"}
          }
        }
      }
    }
  }
, "pkg-config":
  { "vars":
    [ "pkg-name"
    , "pkg-prefix"
    , "pkg-version"
    , "pkg-cflags"
    , "pkg-ldflags"
    , "pkg-flag-files"
    , "pkg-libs"
    , "flat-libs"
    , "pc-install-dir"
    ]
  , "imports":
    { "pkg-prefix-lib-paths": "pkg-prefix-lib-paths"
    , "pkg-prefix-flag-paths": "pkg-prefix-flag-paths"
    }
  , "expression":
    { "type": "let*"
    , "bindings":
      [ ["lib-prefix", "${libdir}"]
      , [ "pkg-ldflags"
        , {"type": "CALL_EXPRESSION", "name": "pkg-prefix-lib-paths"}
        ]
      , [ "flag-prefix"
        , { "type": "join"
          , "$1": ["${prefix}/", {"type": "var", "name": "pc-install-dir"}]
          }
        ]
      , ["flags", {"type": "var", "name": "pkg-cflags"}]
      , [ "pkg-cflags"
        , {"type": "CALL_EXPRESSION", "name": "pkg-prefix-flag-paths"}
        ]
      , ["flags", {"type": "var", "name": "pkg-ldflags"}]
      , [ "pkg-ldflags"
        , {"type": "CALL_EXPRESSION", "name": "pkg-prefix-flag-paths"}
        ]
      ]
    , "body":
      { "type": "singleton_map"
      , "key":
        {"type": "join", "$1": [{"type": "var", "name": "pkg-name"}, ".pc"]}
      , "value":
        { "type": "BLOB"
        , "data":
          { "type": "join"
          , "separator": "\n"
          , "$1":
            [ { "type": "join"
              , "$1":
                [ "prefix="
                , {"type": "var", "name": "pkg-prefix", "default": "/"}
                ]
              }
            , "libdir=${prefix}/lib"
            , "includedir=${prefix}/include"
            , { "type": "join"
              , "$1": ["Name: ", {"type": "var", "name": "pkg-name"}]
              }
            , { "type": "join"
              , "$1":
                [ "Version: "
                , {"type": "var", "name": "pkg-version", "default": "unknown"}
                ]
              }
            , { "type": "join"
              , "$1":
                [ "Description: Pkg-config for "
                , {"type": "var", "name": "pkg-name"}
                , ", generated by JustBuild"
                ]
              }
            , "URL: unknown"
            , { "type": "join"
              , "separator": " "
              , "$1":
                { "type": "++"
                , "$1":
                  [ ["Cflags:", "-I${includedir}"]
                  , {"type": "var", "name": "pkg-cflags"}
                  ]
                }
              }
            , { "type": "join"
              , "separator": " "
              , "$1":
                { "type": "++"
                , "$1":
                  [ ["Libs:"]
                  , { "type": "if"
                    , "cond": {"type": "var", "name": "flat-libs"}
                    , "then": ["-L${libdir}"]
                    }
                  , {"type": "var", "name": "pkg-ldflags"}
                  ]
                }
              }
            , ""
            ]
          }
        }
      }
    }
  }
, "add-fission-compile-flags":
  { "doc": ["Add debug fission flags, if enabled, to existing compile flags."]
  , "vars": ["COMPILE_FLAGS", "DEBUG"]
  , "expression":
    { "type": "let*"
    , "bindings":
      [ [ "fission-config"
        , { "type": "if"
          , "cond":
            { "type": "lookup"
            , "key": "USE_DEBUG_FISSION"
            , "map":
              { "type": "var"
              , "name": "DEBUG"
              , "default": {"type": "empty_map"}
              }
            }
          , "then":
            { "type": "assert_non_empty"
            , "msg":
              [ "Debug fission requires non-empty debug map FISSION_CONFIG field"
              ]
            , "$1":
              { "type": "lookup"
              , "key": "FISSION_CONFIG"
              , "map":
                { "type": "var"
                , "name": "DEBUG"
                , "default": {"type": "empty_map"}
                }
              }
            }
          , "else": {"type": "empty_map"}
          }
        ]
      , [ "flags"
        , { "type": "++"
          , "$1":
            [ {"type": "var", "name": "COMPILE_FLAGS"}
            , { "type": "if"
              , "cond":
                { "type": "lookup"
                , "key": "USE_SPLIT_DWARF"
                , "map": {"type": "var", "name": "fission-config"}
                }
              , "then": ["-gsplit-dwarf"]
              }
            , { "type": "let*"
              , "bindings":
                [ [ "version"
                  , { "type": "lookup"
                    , "key": "DWARF_VERSION"
                    , "map": {"type": "var", "name": "fission-config"}
                    }
                  ]
                ]
              , "body":
                { "type": "if"
                , "cond": {"type": "var", "name": "version"}
                , "then":
                  [ { "type": "join"
                    , "$1": ["-gdwarf-", {"type": "var", "name": "version"}]
                    }
                  ]
                }
              }
            , { "type": "if"
              , "cond":
                { "type": "lookup"
                , "key": "USE_DEBUG_TYPES_SECTION"
                , "map": {"type": "var", "name": "fission-config"}
                }
              , "then": ["-fdebug-types-section"]
              }
            ]
          }
        ]
      ]
    , "body": {"type": "var", "name": "flags"}
    }
  }
, "add-fission-link-flags":
  { "doc": ["Add debug fission flags, if enabled, to existing link flags."]
  , "vars": ["LDFLAGS", "DEBUG"]
  , "expression":
    { "type": "let*"
    , "bindings":
      [ [ "fission-config"
        , { "type": "if"
          , "cond":
            { "type": "lookup"
            , "key": "USE_DEBUG_FISSION"
            , "map":
              { "type": "var"
              , "name": "DEBUG"
              , "default": {"type": "empty_map"}
              }
            }
          , "then":
            { "type": "assert_non_empty"
            , "msg":
              [ "Debug fission requires non-empty debug map FISSION_CONFIG field"
              ]
            , "$1":
              { "type": "lookup"
              , "key": "FISSION_CONFIG"
              , "map":
                { "type": "var"
                , "name": "DEBUG"
                , "default": {"type": "empty_map"}
                }
              }
            }
          , "else": {"type": "empty_map"}
          }
        ]
      , [ "flags"
        , { "type": "++"
          , "$1":
            [ {"type": "var", "name": "LDFLAGS"}
            , { "type": "if"
              , "cond":
                { "type": "lookup"
                , "key": "USE_GDB_INDEX"
                , "map": {"type": "var", "name": "fission-config"}
                }
              , "then": ["-Wl,--gdb-index"]
              }
            ]
          }
        ]
      ]
    , "body": {"type": "var", "name": "flags"}
    }
  }
, "dwarf package":
  { "vars":
    [ "DWP"
    , "TOOLCHAIN"
    , "TOOLCHAIN_DIR"
    , "NON_SYSTEM_TOOLS"
    , "ENV"
    , "name"
    , "dwarf objects"
    , "dwarf deps"
    , "stage"
    ]
  , "imports": {"default-DWP": "default-DWP"}
  , "expression":
    { "type": "let*"
    , "bindings":
      [ [ "DWP"
        , { "type": "var"
          , "name": "DWP"
          , "default":
            { "type": "join"
            , "$1":
              { "type": "++"
              , "$1":
                [ { "type": "if"
                  , "cond":
                    { "type": "lookup"
                    , "key": "DWP"
                    , "map": {"type": "var", "name": "NON_SYSTEM_TOOLS"}
                    }
                  , "then":
                    ["./", {"type": "var", "name": "TOOLCHAIN_DIR"}, "/"]
                  }
                , {"type": "CALL_EXPRESSION", "name": "default-DWP"}
                ]
              }
            }
          }
        ]
      , [ "pkgname"
        , {"type": "join", "$1": [{"type": "var", "name": "name"}, ".dwp"]}
        ]
      , [ "pkgpath"
        , { "type": "if"
          , "cond": {"type": "var", "name": "stage"}
          , "then":
            { "type": "join"
            , "separator": "/"
            , "$1":
              [ {"type": "var", "name": "stage"}
              , {"type": "var", "name": "pkgname"}
              ]
            }
          , "else": {"type": "var", "name": "pkgname"}
          }
        ]
      , [ "objects"
        , { "type": "var"
          , "name": "dwarf objects"
          , "default": {"type": "empty_map"}
          }
        ]
      , [ "objects"
        , { "type": "disjoint_map_union"
          , "$1":
            [ {"type": "var", "name": "objects"}
            , {"type": "var", "name": "dwarf deps"}
            ]
          }
        ]
      , [ "dwarf pkg"
        , { "type": "if"
          , "cond": {"type": "var", "name": "objects"}
          , "else": {"type": "empty_map"}
          , "then":
            { "type": "let*"
            , "bindings":
              [ [ "staged objects"
                , { "type": "to_subdir"
                  , "subdir": "work"
                  , "$1": {"type": "var", "name": "objects"}
                  }
                ]
              , [ "staged pkgpath"
                , { "type": "join"
                  , "$1": ["work/", {"type": "var", "name": "pkgpath"}]
                  }
                ]
              , [ "staged pkg"
                , { "type": "ACTION"
                  , "outs": [{"type": "var", "name": "staged pkgpath"}]
                  , "inputs":
                    { "type": "map_union"
                    , "$1":
                      [ {"type": "var", "name": "TOOLCHAIN"}
                      , {"type": "var", "name": "staged objects"}
                      ]
                    }
                  , "env":
                    { "type": "var"
                    , "name": "ENV"
                    , "default": {"type": "empty_map"}
                    }
                  , "cmd":
                    { "type": "++"
                    , "$1":
                      [ [ {"type": "var", "name": "DWP", "default": "dwp"}
                        , "-o"
                        , {"type": "var", "name": "staged pkgpath"}
                        ]
                      , { "type": "keys"
                        , "$1": {"type": "var", "name": "staged objects"}
                        }
                      ]
                    }
                  }
                ]
              , [ "pkg artifact"
                , { "type": "lookup"
                  , "map": {"type": "var", "name": "staged pkg"}
                  , "key": {"type": "var", "name": "staged pkgpath"}
                  }
                ]
              ]
            , "body":
              { "type": "singleton_map"
              , "key": {"type": "var", "name": "pkgpath"}
              , "value": {"type": "var", "name": "pkg artifact"}
              }
            }
          }
        ]
      ]
    , "body": {"type": "var", "name": "dwarf pkg"}
    }
  }
, "objects":
  { "vars":
    [ "COMPILER"
    , "COMPILE_FLAGS"
    , "ENV"
    , "DEBUG"
    , "TOOLCHAIN"
    , "srcs"
    , "hdrs"
    , "private-hdrs"
    , "compile-deps"
    , "cflags-files"
    , "component-fieldnames"
    , "defaults-transition"
    , "deps-transition"
    , "modified-transitions"
    ]
  , "imports":
    { "field_artifacts": ["./", "..", "field_artifacts"]
    , "default-INCLUDE_SCANNER": "default-INCLUDE_SCANNER"
    , "add-fission-compile-flags": "add-fission-compile-flags"
    }
  , "expression":
    { "type": "let*"
    , "bindings":
      [ [ "include tree"
        , { "type": "singleton_map"
          , "key": "include"
          , "value":
            {"type": "TREE", "$1": {"type": "var", "name": "compile-deps"}}
          }
        ]
      , [ "all hdrs"
        , { "type": "map_union"
          , "$1":
            [ {"type": "var", "name": "include tree"}
            , { "type": "to_subdir"
              , "subdir": "work"
              , "$1":
                { "type": "disjoint_map_union"
                , "$1":
                  [ {"type": "var", "name": "hdrs"}
                  , {"type": "var", "name": "private-hdrs"}
                  ]
                }
              }
            ]
          }
        ]
      , [ "include_scan_tool"
        , { "type": "disjoint_map_union"
          , "msg": "Include scanner should be single artifact"
          , "$1":
            { "type": "foreach"
            , "var": "artifact"
            , "range":
              { "type": "values"
              , "$1":
                {"type": "CALL_EXPRESSION", "name": "default-INCLUDE_SCANNER"}
              }
            , "body":
              { "type": "singleton_map"
              , "key": "include_scan"
              , "value": {"type": "var", "name": "artifact"}
              }
            }
          }
        ]
      , [ "compile flags"
        , {"type": "CALL_EXPRESSION", "name": "add-fission-compile-flags"}
        ]
      , [ "my output artifacts"
        , { "type": "foreach_map"
          , "var_key": "src_name"
          , "var_val": "src_val"
          , "range": {"type": "var", "name": "srcs"}
          , "body":
            { "type": "let*"
            , "bindings":
              [ [ "work src_name"
                , { "type": "join"
                  , "separator": "/"
                  , "$1": ["work", {"type": "var", "name": "src_name"}]
                  }
                ]
              , [ "inputs"
                , { "type": "map_union"
                  , "$1":
                    [ {"type": "var", "name": "all hdrs"}
                    , { "type": "singleton_map"
                      , "key": {"type": "var", "name": "work src_name"}
                      , "value": {"type": "var", "name": "src_val"}
                      }
                    , { "type": "var"
                      , "name": "cflags-files"
                      , "default": {"type": "empty_map"}
                      }
                    , { "type": "var"
                      , "name": "TOOLCHAIN"
                      , "default": {"type": "empty_map"}
                      }
                    ]
                  }
                ]
              , [ "out"
                , { "type": "change_ending"
                  , "$1": {"type": "var", "name": "src_name"}
                  , "ending": ".o"
                  }
                ]
              , [ "work out"
                , { "type": "join"
                  , "separator": "/"
                  , "$1": ["work", {"type": "var", "name": "out"}]
                  }
                ]
              , [ "dwarf out"
                , { "type": "change_ending"
                  , "$1": {"type": "var", "name": "src_name"}
                  , "ending": ".dwo"
                  }
                ]
              , [ "work dwarf out"
                , { "type": "join"
                  , "separator": "/"
                  , "$1": ["work", {"type": "var", "name": "dwarf out"}]
                  }
                ]
              , [ "cmdline"
                , { "type": "++"
                  , "$1":
                    [ [{"type": "var", "name": "COMPILER"}]
                    , {"type": "var", "name": "compile flags"}
                    , ["-I", "work", "-isystem", "include"]
                    , ["-c", {"type": "var", "name": "work src_name"}]
                    ]
                  }
                ]
              , [ "minimal include tree"
                , { "type": "if"
                  , "cond": {"type": "var", "name": "include_scan_tool"}
                  , "then":
                    { "type": "from_subdir"
                    , "subdir": "out"
                    , "$1":
                      { "type": "ACTION"
                      , "out_dirs": ["out/include"]
                      , "inputs":
                        { "type": "map_union"
                        , "$1":
                          [ {"type": "var", "name": "inputs"}
                          , {"type": "var", "name": "include_scan_tool"}
                          ]
                        }
                      , "env":
                        { "type": "var"
                        , "name": "ENV"
                        , "default": {"type": "empty_map"}
                        }
                      , "cmd":
                        { "type": "++"
                        , "$1":
                          [ ["./include_scan"]
                          , ["out"]
                          , {"type": "var", "name": "cmdline"}
                          , ["-E", "-M"]
                          ]
                        }
                      }
                    }
                  , "else": {"type": "var", "name": "include tree"}
                  }
                ]
              , [ "minimal inputs"
                , { "type": "map_union"
                  , "$1":
                    [ {"type": "var", "name": "inputs"}
                    , {"type": "var", "name": "minimal include tree"}
                    ]
                  }
                ]
              , [ "action output"
                , { "type": "ACTION"
                  , "outs":
                    { "type": "++"
                    , "$1":
                      [ { "type": "if"
                        , "cond":
                          { "type": "lookup"
                          , "key": "USE_DEBUG_FISSION"
                          , "map":
                            { "type": "var"
                            , "name": "DEBUG"
                            , "default": {"type": "empty_map"}
                            }
                          }
                        , "then": [{"type": "var", "name": "work dwarf out"}]
                        , "else": []
                        }
                      , [{"type": "var", "name": "work out"}]
                      ]
                    }
                  , "inputs": {"type": "var", "name": "minimal inputs"}
                  , "env":
                    { "type": "var"
                    , "name": "ENV"
                    , "default": {"type": "empty_map"}
                    }
                  , "cmd":
                    { "type": "++"
                    , "$1":
                      [ {"type": "var", "name": "cmdline"}
                      , ["-o", {"type": "var", "name": "work out"}]
                      ]
                    }
                  }
                ]
              , [ "staged output artifacts"
                , { "type": "++"
                  , "$1":
                    [ [ { "type": "singleton_map"
                        , "key": {"type": "var", "name": "out"}
                        , "value":
                          { "type": "lookup"
                          , "key": {"type": "var", "name": "work out"}
                          , "map": {"type": "var", "name": "action output"}
                          }
                        }
                      ]
                    , { "type": "if"
                      , "cond":
                        { "type": "lookup"
                        , "key": "USE_DEBUG_FISSION"
                        , "map":
                          { "type": "var"
                          , "name": "DEBUG"
                          , "default": {"type": "empty_map"}
                          }
                        }
                      , "else": []
                      , "then":
                        [ { "type": "singleton_map"
                          , "key": {"type": "var", "name": "dwarf out"}
                          , "value":
                            { "type": "lookup"
                            , "key": {"type": "var", "name": "work dwarf out"}
                            , "map": {"type": "var", "name": "action output"}
                            }
                          }
                        ]
                      }
                    ]
                  }
                ]
              ]
            , "body": {"type": "var", "name": "staged output artifacts"}
            }
          }
        ]
      , [ "my objects"
        , { "type": "map_union"
          , "$1":
            { "type": "foreach"
            , "range": {"type": "var", "name": "my output artifacts"}
            , "body":
              { "type": "[]"
              , "index": "0"
              , "list": {"type": "var", "name": "_"}
              }
            }
          }
        ]
      , [ "my dwarf objects"
        , { "type": "if"
          , "cond":
            { "type": "lookup"
            , "key": "USE_DEBUG_FISSION"
            , "map":
              { "type": "var"
              , "name": "DEBUG"
              , "default": {"type": "empty_map"}
              }
            }
          , "else": {"type": "empty_map"}
          , "then":
            { "type": "map_union"
            , "$1":
              { "type": "foreach"
              , "range": {"type": "var", "name": "my output artifacts"}
              , "body":
                { "type": "[]"
                , "index": "1"
                , "list": {"type": "var", "name": "_"}
                }
              }
            }
          }
        ]
      , [ "component artifacts"
        , { "type": "disjoint_map_union"
          , "$1":
            { "type": "foreach"
            , "var": "fieldname"
            , "range":
              {"type": "var", "name": "component-fieldnames", "default": []}
            , "body":
              { "type": "let*"
              , "bindings":
                [ [ "transition"
                  , { "type": "lookup"
                    , "map":
                      { "type": "var"
                      , "name": "modified-transitions"
                      , "default": {"type": "empty_map"}
                      }
                    , "key": {"type": "var", "name": "fieldname"}
                    , "default": {"type": "var", "name": "deps-transition"}
                    }
                  ]
                ]
              , "body": {"type": "CALL_EXPRESSION", "name": "field_artifacts"}
              }
            }
          }
        ]
      ]
    , "body":
      { "type": "map_union"
      , "$1":
        [ { "type": "singleton_map"
          , "key": "objects"
          , "value":
            { "type": "disjoint_map_union"
            , "msg": "Staging conflict between own objects and objects of components"
            , "$1":
              [ {"type": "var", "name": "my objects"}
              , {"type": "var", "name": "component artifacts"}
              ]
            }
          }
        , { "type": "singleton_map"
          , "key": "dwarf objects"
          , "value": {"type": "var", "name": "my dwarf objects"}
          }
        ]
      }
    }
  }
, "lint information":
  { "vars":
    [ "CC"
    , "CXX"
    , "CFLAGS"
    , "CXXFLAGS"
    , "ADD_CFLAGS"
    , "ADD_CXXFLAGS"
    , "DEBUG"
    , "pure C"
    , "srcs"
    , "hdrs"
    , "private-hdrs"
    , "compile-deps"
    , "cflags-files"
    , "lint-deps fieldnames"
    , "deps-transition"
    , "deps-fieldnames"
    , "compile-args"
    , "defaults-transition"
    , "modified-transitions"
    ]
  , "imports":
    { "list_provider": ["./", "..", "field_list_provider"]
    , "runfiles_list": ["./", "..", "field_runfiles_list"]
    , "default-TOOLCHAIN": "default-TOOLCHAIN"
    , "default-NON_SYSTEM_TOOLS": "default-NON_SYSTEM_TOOLS"
    , "compiler": "compiler"
    , "flags": "flags"
    , "add-fission-compile-flags": "add-fission-compile-flags"
    }
  , "expression":
    { "type": "let*"
    , "bindings":
      [ ["TOOLCHAIN_DIR", "toolchain"]
      , ["TOOLCHAIN", {"type": "CALL_EXPRESSION", "name": "default-TOOLCHAIN"}]
      , [ "TOOLCHAIN"
        , { "type": "to_subdir"
          , "subdir": {"type": "var", "name": "TOOLCHAIN_DIR"}
          , "$1": {"type": "var", "name": "TOOLCHAIN"}
          }
        ]
      , [ "NON_SYSTEM_TOOLS"
        , {"type": "CALL_EXPRESSION", "name": "default-NON_SYSTEM_TOOLS"}
        ]
      , ["COMPILER", {"type": "CALL_EXPRESSION", "name": "compiler"}]
      , [ "COMPILE_FLAGS"
        , { "type": "++"
          , "$1":
            [ {"type": "CALL_EXPRESSION", "name": "flags"}
            , {"type": "var", "name": "compile-args"}
            ]
          }
        ]
      , [ "compile flags"
        , {"type": "CALL_EXPRESSION", "name": "add-fission-compile-flags"}
        ]
      , [ "include tree"
        , { "type": "singleton_map"
          , "key": "include"
          , "value":
            {"type": "TREE", "$1": {"type": "var", "name": "compile-deps"}}
          }
        ]
      , [ "all hdrs"
        , { "type": "map_union"
          , "$1":
            [ {"type": "var", "name": "include tree"}
            , { "type": "to_subdir"
              , "subdir": "work"
              , "$1":
                { "type": "disjoint_map_union"
                , "$1":
                  [ {"type": "var", "name": "hdrs"}
                  , {"type": "var", "name": "private-hdrs"}
                  ]
                }
              }
            ]
          }
        ]
      , [ "direct-deps hdrs"
        , { "type": "to_subdir"
          , "subdir": "include"
          , "$1":
            { "type": "map_union"
            , "$1":
              { "type": "++"
              , "$1":
                { "type": "foreach"
                , "var": "fieldname"
                , "range": {"type": "var", "name": "deps-fieldnames"}
                , "body":
                  { "type": "let*"
                  , "bindings":
                    [ [ "transition"
                      , { "type": "lookup"
                        , "map":
                          { "type": "var"
                          , "name": "modified-transitions"
                          , "default": {"type": "empty_map"}
                          }
                        , "key": {"type": "var", "name": "fieldname"}
                        , "default": {"type": "var", "name": "deps-transition"}
                        }
                      ]
                    ]
                  , "body":
                    {"type": "CALL_EXPRESSION", "name": "runfiles_list"}
                  }
                }
              }
            }
          }
        ]
      , [ "own headers"
        , { "type": "to_subdir"
          , "subdir": "work"
          , "$1":
            { "type": "map_union"
            , "$1":
              [ {"type": "var", "name": "hdrs"}
              , {"type": "var", "name": "private-hdrs"}
              ]
            }
          }
        ]
      , [ "direct hdrs"
        , { "type": "map_union"
          , "$1":
            [ {"type": "var", "name": "own headers"}
            , {"type": "var", "name": "direct-deps hdrs"}
            ]
          }
        ]
      , [ "direct deps artifact names"
        , {"type": "keys", "$1": {"type": "var", "name": "direct hdrs"}}
        ]
      , [ "hdr lint"
        , { "type": "foreach"
          , "range":
            { "type": "++"
            , "$1":
              [ {"type": "keys", "$1": {"type": "var", "name": "private-hdrs"}}
              , {"type": "keys", "$1": {"type": "var", "name": "hdrs"}}
              ]
            }
          , "body":
            { "type": "VALUE_NODE"
            , "$1":
              { "type": "RESULT"
              , "artifacts": {"type": "var", "name": "all hdrs"}
              , "provides":
                { "type": "let*"
                , "bindings":
                  [ [ "src"
                    , { "type": "join"
                      , "$1": ["work/", {"type": "var", "name": "_"}]
                      }
                    ]
                  , [ "cmd"
                    , { "type": "++"
                      , "$1":
                        [ [{"type": "var", "name": "COMPILER"}]
                        , {"type": "var", "name": "compile flags"}
                        , [ "-I"
                          , "work"
                          , "-isystem"
                          , "include"
                          , "-E"
                          , {"type": "var", "name": "src"}
                          ]
                        ]
                      }
                    ]
                  , ["extra outs", []]
                  ]
                , "body":
                  { "type": "env"
                  , "vars":
                    ["cmd", "src", "direct deps artifact names", "extra outs"]
                  }
                }
              }
            }
          }
        ]
      , [ "src lint"
        , { "type": "foreach_map"
          , "var_key": "src_name"
          , "var_val": "src_val"
          , "range": {"type": "var", "name": "srcs"}
          , "body":
            { "type": "let*"
            , "bindings":
              [ [ "work src_name"
                , { "type": "join"
                  , "separator": "/"
                  , "$1": ["work", {"type": "var", "name": "src_name"}]
                  }
                ]
              , [ "inputs"
                , { "type": "map_union"
                  , "$1":
                    [ {"type": "var", "name": "all hdrs"}
                    , { "type": "singleton_map"
                      , "key": {"type": "var", "name": "work src_name"}
                      , "value": {"type": "var", "name": "src_val"}
                      }
                    , { "type": "var"
                      , "name": "cflags-files"
                      , "default": {"type": "empty_map"}
                      }
                    , { "type": "var"
                      , "name": "TOOLCHAIN"
                      , "default": {"type": "empty_map"}
                      }
                    ]
                  }
                ]
              , [ "out"
                , { "type": "change_ending"
                  , "$1": {"type": "var", "name": "src_name"}
                  , "ending": ".o"
                  }
                ]
              , [ "work out"
                , { "type": "join"
                  , "separator": "/"
                  , "$1": ["work", {"type": "var", "name": "out"}]
                  }
                ]
              , [ "dwarf out"
                , { "type": "change_ending"
                  , "$1": {"type": "var", "name": "src_name"}
                  , "ending": ".dwo"
                  }
                ]
              , [ "work dwarf out"
                , { "type": "join"
                  , "separator": "/"
                  , "$1": ["work", {"type": "var", "name": "dwarf out"}]
                  }
                ]
              , [ "extra outs"
                , { "type": "if"
                  , "cond":
                    { "type": "lookup"
                    , "key": "USE_DEBUG_FISSION"
                    , "map":
                      { "type": "var"
                      , "name": "DEBUG"
                      , "default": {"type": "empty_map"}
                      }
                    }
                  , "then": [{"type": "var", "name": "work dwarf out"}]
                  , "else": []
                  }
                ]
              , [ "cmd"
                , { "type": "++"
                  , "$1":
                    [ [{"type": "var", "name": "COMPILER"}]
                    , {"type": "var", "name": "compile flags"}
                    , ["-I", "work", "-isystem", "include"]
                    , ["-c", {"type": "var", "name": "work src_name"}]
                    , ["-o", {"type": "var", "name": "work out"}]
                    ]
                  }
                ]
              ]
            , "body":
              { "type": "VALUE_NODE"
              , "$1":
                { "type": "RESULT"
                , "artifacts": {"type": "var", "name": "inputs"}
                , "provides":
                  { "type": "let*"
                  , "bindings":
                    [["src", {"type": "var", "name": "work src_name"}]]
                  , "body":
                    { "type": "env"
                    , "vars":
                      [ "cmd"
                      , "src"
                      , "direct deps artifact names"
                      , "extra outs"
                      ]
                    }
                  }
                }
              }
            }
          }
        ]
      , [ "dep lint nodes"
        , { "type": "++"
          , "$1":
            { "type": "foreach"
            , "var": "fieldname"
            , "range": {"type": "var", "name": "lint-deps fieldnames"}
            , "body":
              { "type": "let*"
              , "bindings":
                [ ["provider", "lint"]
                , [ "transition"
                  , { "type": "lookup"
                    , "map":
                      { "type": "var"
                      , "name": "modified-transitions"
                      , "default": {"type": "empty_map"}
                      }
                    , "key": {"type": "var", "name": "fieldname"}
                    , "default": {"type": "var", "name": "deps-transition"}
                    }
                  ]
                ]
              , "body": {"type": "CALL_EXPRESSION", "name": "list_provider"}
              }
            }
          }
        ]
      , [ "lint nodes"
        , { "type": "++"
          , "$1":
            [ {"type": "var", "name": "hdr lint"}
            , {"type": "var", "name": "src lint"}
            , {"type": "var", "name": "dep lint nodes"}
            ]
          }
        ]
      , [ "lint nodes"
        , {"type": "nub_right", "$1": {"type": "var", "name": "lint nodes"}}
        ]
      ]
    , "body": {"type": "var", "name": "lint nodes"}
    }
  }
, "compiler-cc":
  { "vars": ["CC", "TOOLCHAIN_DIR", "NON_SYSTEM_TOOLS", "defaults-transition"]
  , "imports": {"default-CC": "default-CC"}
  , "expression":
    { "type": "var"
    , "name": "CC"
    , "default":
      { "type": "join"
      , "$1":
        { "type": "++"
        , "$1":
          [ { "type": "if"
            , "cond":
              { "type": "lookup"
              , "key": "CC"
              , "map": {"type": "var", "name": "NON_SYSTEM_TOOLS"}
              }
            , "then": ["./", {"type": "var", "name": "TOOLCHAIN_DIR"}, "/"]
            }
          , {"type": "CALL_EXPRESSION", "name": "default-CC"}
          ]
        }
      }
    }
  }
, "compiler-cxx":
  { "vars": ["CXX", "TOOLCHAIN_DIR", "NON_SYSTEM_TOOLS", "defaults-transition"]
  , "imports": {"default-CXX": "default-CXX"}
  , "expression":
    { "type": "var"
    , "name": "CXX"
    , "default":
      { "type": "join"
      , "$1":
        { "type": "++"
        , "$1":
          [ { "type": "if"
            , "cond":
              { "type": "lookup"
              , "key": "CXX"
              , "map": {"type": "var", "name": "NON_SYSTEM_TOOLS"}
              }
            , "then": ["./", {"type": "var", "name": "TOOLCHAIN_DIR"}, "/"]
            }
          , {"type": "CALL_EXPRESSION", "name": "default-CXX"}
          ]
        }
      }
    }
  }
, "compiler":
  { "vars":
    [ "CC"
    , "CXX"
    , "pure C"
    , "TOOLCHAIN_DIR"
    , "NON_SYSTEM_TOOLS"
    , "defaults-transition"
    ]
  , "imports": {"compiler-cc": "compiler-cc", "compiler-cxx": "compiler-cxx"}
  , "expression":
    { "type": "if"
    , "cond": {"type": "var", "name": "pure C"}
    , "then": {"type": "CALL_EXPRESSION", "name": "compiler-cc"}
    , "else": {"type": "CALL_EXPRESSION", "name": "compiler-cxx"}
    }
  }
, "flags-cc":
  { "vars":
    [ "CFLAGS"
    , "ADD_CFLAGS"
    , "BUILD_POSITION_INDEPENDENT"
    , "defaults-transition"
    ]
  , "imports": {"default-CFLAGS": "default-CFLAGS"}
  , "expression":
    { "type": "++"
    , "$1":
      [ { "type": "if"
        , "cond": {"type": "var", "name": "BUILD_POSITION_INDEPENDENT"}
        , "then": ["-fPIC"]
        }
      , { "type": "var"
        , "name": "CFLAGS"
        , "default": {"type": "CALL_EXPRESSION", "name": "default-CFLAGS"}
        }
      , {"type": "var", "name": "ADD_CFLAGS", "default": []}
      ]
    }
  }
, "flags-cxx":
  { "vars":
    [ "CXXFLAGS"
    , "ADD_CXXFLAGS"
    , "BUILD_POSITION_INDEPENDENT"
    , "defaults-transition"
    ]
  , "imports": {"default-CXXFLAGS": "default-CXXFLAGS"}
  , "expression":
    { "type": "++"
    , "$1":
      [ { "type": "if"
        , "cond": {"type": "var", "name": "BUILD_POSITION_INDEPENDENT"}
        , "then": ["-fPIC"]
        }
      , { "type": "var"
        , "name": "CXXFLAGS"
        , "default": {"type": "CALL_EXPRESSION", "name": "default-CXXFLAGS"}
        }
      , {"type": "var", "name": "ADD_CXXFLAGS", "default": []}
      ]
    }
  }
, "flags":
  { "vars":
    [ "CFLAGS"
    , "CXXFLAGS"
    , "ADD_CFLAGS"
    , "ADD_CXXFLAGS"
    , "DEBUG"
    , "BUILD_POSITION_INDEPENDENT"
    , "pure C"
    , "defaults-transition"
    ]
  , "imports": {"flags-cc": "flags-cc", "flags-cxx": "flags-cxx"}
  , "expression":
    { "type": "let*"
    , "bindings":
      [ [ "flags"
        , { "type": "if"
          , "cond": {"type": "var", "name": "pure C"}
          , "then": {"type": "CALL_EXPRESSION", "name": "flags-cc"}
          , "else": {"type": "CALL_EXPRESSION", "name": "flags-cxx"}
          }
        ]
      ]
    , "body":
      { "type": "if"
      , "cond": {"type": "var", "name": "flags"}
      , "then": {"type": "var", "name": "flags"}
      , "else":
        { "type": "if"
        , "cond": {"type": "var", "name": "DEBUG"}
        , "then": ["-g"]
        }
      }
    }
  }
, "lib artifact":
  { "doc": ["Provides the library artifact."]
  , "vars":
    [ "CC"
    , "CXX"
    , "CFLAGS"
    , "CXXFLAGS"
    , "ADD_CFLAGS"
    , "ADD_CXXFLAGS"
    , "AR"
    , "ENV"
    , "BUILD_POSITION_INDEPENDENT"
    , "DEBUG"
    , "name"
    , "pure C"
    , "srcs"
    , "hdrs"
    , "private-hdrs"
    , "stage"
    , "compile-deps"
    , "compile-args"
    , "cflags-files"
    , "defaults-transition"
    , "component-fieldnames"
    , "deps-transition"
    , "modified-transitions"
    ]
  , "imports": {"lib action": "lib action"}
  , "expression":
    { "type": "lookup"
    , "key": "library"
    , "map": {"type": "CALL_EXPRESSION", "name": "lib action"}
    , "default": {"type": "empty_map"}
    }
  }
, "lib action":
  { "doc":
    [ "Run the action producing the library artifact and pass it together with"
    , "related information to consumers."
    ]
  , "vars":
    [ "CC"
    , "CXX"
    , "CFLAGS"
    , "CXXFLAGS"
    , "ADD_CFLAGS"
    , "ADD_CXXFLAGS"
    , "AR"
    , "ENV"
    , "BUILD_POSITION_INDEPENDENT"
    , "DEBUG"
    , "name"
    , "pure C"
    , "srcs"
    , "hdrs"
    , "private-hdrs"
    , "stage"
    , "compile-deps"
    , "compile-args"
    , "cflags-files"
    , "defaults-transition"
    , "component-fieldnames"
    , "deps-transition"
    , "modified-transitions"
    ]
  , "imports":
    { "compiler": "compiler"
    , "flags": "flags"
    , "objects": "objects"
    , "default-AR": "default-AR"
    , "default-ARFLAGS": "default-ARFLAGS"
    , "default-ENV": "default-ENV"
    , "default-PATH": "default-PATH"
    , "default-TOOLCHAIN": "default-TOOLCHAIN"
    , "default-NON_SYSTEM_TOOLS": "default-NON_SYSTEM_TOOLS"
    }
  , "expression":
    { "type": "let*"
    , "bindings":
      [ ["TOOLCHAIN_DIR", "toolchain"]
      , ["TOOLCHAIN", {"type": "CALL_EXPRESSION", "name": "default-TOOLCHAIN"}]
      , [ "TOOLCHAIN"
        , { "type": "to_subdir"
          , "subdir": {"type": "var", "name": "TOOLCHAIN_DIR"}
          , "$1": {"type": "var", "name": "TOOLCHAIN"}
          }
        ]
      , [ "NON_SYSTEM_TOOLS"
        , {"type": "CALL_EXPRESSION", "name": "default-NON_SYSTEM_TOOLS"}
        ]
      , ["COMPILER", {"type": "CALL_EXPRESSION", "name": "compiler"}]
      , [ "COMPILE_FLAGS"
        , { "type": "++"
          , "$1":
            [ {"type": "CALL_EXPRESSION", "name": "flags"}
            , {"type": "var", "name": "compile-args"}
            ]
          }
        ]
      , [ "AR"
        , { "type": "var"
          , "name": "AR"
          , "default":
            { "type": "join"
            , "$1":
              { "type": "++"
              , "$1":
                [ { "type": "if"
                  , "cond":
                    { "type": "lookup"
                    , "key": "AR"
                    , "map": {"type": "var", "name": "NON_SYSTEM_TOOLS"}
                    }
                  , "then":
                    ["./", {"type": "var", "name": "TOOLCHAIN_DIR"}, "/"]
                  }
                , {"type": "CALL_EXPRESSION", "name": "default-AR"}
                ]
              }
            }
          }
        ]
      , ["ARFLAGS", {"type": "CALL_EXPRESSION", "name": "default-ARFLAGS"}]
      , [ "ENV"
        , { "type": "map_union"
          , "$1":
            [ {"type": "CALL_EXPRESSION", "name": "default-ENV"}
            , {"type": "var", "name": "ENV", "default": {"type": "empty_map"}}
            ]
          }
        ]
      , [ "ENV_PATH"
        , { "type": "lookup"
          , "map": {"type": "var", "name": "ENV"}
          , "key": "PATH"
          }
        ]
      , [ "ENV"
        , { "type": "map_union"
          , "$1":
            [ {"type": "var", "name": "ENV"}
            , { "type": "singleton_map"
              , "key": "PATH"
              , "value":
                { "type": "join"
                , "separator": ":"
                , "$1":
                  { "type": "++"
                  , "$1":
                    [ {"type": "CALL_EXPRESSION", "name": "default-PATH"}
                    , { "type": "if"
                      , "cond": {"type": "var", "name": "ENV_PATH"}
                      , "then": [{"type": "var", "name": "ENV_PATH"}]
                      }
                    ]
                  }
                }
              }
            ]
          }
        ]
      , ["objects result", {"type": "CALL_EXPRESSION", "name": "objects"}]
      , [ "objects"
        , { "type": "lookup"
          , "key": "objects"
          , "map":
            { "type": "var"
            , "name": "objects result"
            , "default": {"type": "empty_map"}
            }
          }
        ]
      , [ "base name"
        , { "type": "if"
          , "cond": {"type": "var", "name": "objects"}
          , "then":
            { "type": "assert_non_empty"
            , "msg": "A name has to be provided for non-header-only libraries"
            , "$1": {"type": "var", "name": "name"}
            }
          , "else": {"type": "var", "name": "name"}
          }
        ]
      , [ "libname"
        , { "type": "join"
          , "$1": ["lib", {"type": "var", "name": "base name"}, ".a"]
          }
        ]
      , [ "libpath"
        , { "type": "if"
          , "cond": {"type": "var", "name": "stage"}
          , "then":
            { "type": "join"
            , "separator": "/"
            , "$1":
              [ {"type": "var", "name": "stage"}
              , {"type": "var", "name": "libname"}
              ]
            }
          , "else": {"type": "var", "name": "libname"}
          }
        ]
      , [ "lib"
        , { "type": "if"
          , "cond": {"type": "var", "name": "objects"}
          , "else": {"type": "empty_map"}
          , "then":
            { "type": "let*"
            , "bindings":
              [ [ "staged objects"
                , { "type": "to_subdir"
                  , "subdir": "work"
                  , "$1": {"type": "var", "name": "objects"}
                  }
                ]
              , [ "staged libpath"
                , { "type": "join"
                  , "$1": ["work/", {"type": "var", "name": "libpath"}]
                  }
                ]
              , [ "staged lib"
                , { "type": "ACTION"
                  , "outs": [{"type": "var", "name": "staged libpath"}]
                  , "inputs":
                    { "type": "map_union"
                    , "$1":
                      [ {"type": "var", "name": "TOOLCHAIN"}
                      , {"type": "var", "name": "staged objects"}
                      ]
                    }
                  , "env":
                    { "type": "var"
                    , "name": "ENV"
                    , "default": {"type": "empty_map"}
                    }
                  , "cmd":
                    { "type": "++"
                    , "$1":
                      [ [{"type": "var", "name": "AR", "default": "ar"}]
                      , {"type": "var", "name": "ARFLAGS"}
                      , [{"type": "var", "name": "staged libpath"}]
                      , { "type": "keys"
                        , "$1": {"type": "var", "name": "staged objects"}
                        }
                      ]
                    }
                  }
                ]
              , [ "lib artifact"
                , { "type": "lookup"
                  , "map": {"type": "var", "name": "staged lib"}
                  , "key": {"type": "var", "name": "staged libpath"}
                  }
                ]
              ]
            , "body":
              { "type": "singleton_map"
              , "key": {"type": "var", "name": "libpath"}
              , "value": {"type": "var", "name": "lib artifact"}
              }
            }
          }
        ]
      ]
    , "body":
      { "type": "map_union"
      , "$1":
        [ { "type": "singleton_map"
          , "key": "library"
          , "value": {"type": "var", "name": "lib"}
          }
        , { "type": "singleton_map"
          , "key": "dwarf objects"
          , "value":
            { "type": "lookup"
            , "key": "dwarf objects"
            , "map":
              { "type": "var"
              , "name": "objects result"
              , "default": {"type": "empty_map"}
              }
            }
          }
        , { "type": "env"
          , "vars": ["TOOLCHAIN", "TOOLCHAIN_DIR", "NON_SYSTEM_TOOLS", "ENV"]
          }
        ]
      }
    }
  }
, "lib result":
  { "vars":
    [ "CC"
    , "CXX"
    , "CFLAGS"
    , "CXXFLAGS"
    , "ADD_CFLAGS"
    , "ADD_CXXFLAGS"
    , "AR"
    , "ENV"
    , "BUILD_POSITION_INDEPENDENT"
    , "DEBUG"
    , "LINT"
    , "name"
    , "pure C"
    , "srcs"
    , "hdrs"
    , "private-hdrs"
    , "cflags"
    , "private-cflags"
    , "ldflags"
    , "private-ldflags"
    , "stage"
    , "pkg-name"
    , "extra-provides"
    , "public-fieldnames"
    , "private-fieldnames"
    , "component-fieldnames"
    , "deps-transition"
    , "modified-transitions"
    , "defaults-transition"
    ]
  , "imports":
    { "compile-deps": "compile-deps"
    , "compile-args-deps": "compile-args-deps"
    , "link-deps": "link-deps"
    , "link-args-deps": "link-args-deps"
    , "run-libs-deps": "run-libs-deps"
    , "run-libs-args-deps": "run-libs-args-deps"
    , "cflags-files-deps": "cflags-files-deps"
    , "ldflags-files-deps": "ldflags-files-deps"
    , "lib action": "lib action"
    , "debug-deps": "debug-deps"
    , "lint": "lint information"
    , "dwarf package": "dwarf package"
    }
  , "expression":
    { "type": "let*"
    , "bindings":
      [ ["deps-fieldnames", {"type": "var", "name": "private-fieldnames"}]
      , ["compile-deps", {"type": "CALL_EXPRESSION", "name": "compile-deps"}]
      , [ "compile-args"
        , { "type": "nub_right"
          , "$1":
            { "type": "++"
            , "$1":
              [ {"type": "var", "name": "cflags"}
              , {"type": "var", "name": "private-cflags"}
              , {"type": "CALL_EXPRESSION", "name": "compile-args-deps"}
              ]
            }
          }
        ]
      , [ "cflags-files"
        , {"type": "CALL_EXPRESSION", "name": "cflags-files-deps"}
        ]
      , ["link-deps", {"type": "CALL_EXPRESSION", "name": "link-deps"}]
      , [ "lib action result"
        , {"type": "CALL_EXPRESSION", "name": "lib action"}
        ]
      , [ "lib"
        , { "type": "lookup"
          , "key": "library"
          , "map": {"type": "var", "name": "lib action result"}
          }
        ]
      , [ "dwarf objects"
        , { "type": "lookup"
          , "key": "dwarf objects"
          , "map": {"type": "var", "name": "lib action result"}
          }
        ]
      , ["dwarf deps", {"type": "empty_map"}]
      , [ "dwarf-pkg"
        , { "type": "if"
          , "cond":
            { "type": "and"
            , "$1":
              [ {"type": "var", "name": "dwarf objects"}
              , { "type": "lookup"
                , "key": "USE_DEBUG_FISSION"
                , "map":
                  { "type": "var"
                  , "name": "DEBUG"
                  , "default": {"type": "empty_map"}
                  }
                }
              ]
            }
          , "then":
            { "type": "let*"
            , "bindings":
              [ [ "TOOLCHAIN"
                , { "type": "lookup"
                  , "key": "TOOLCHAIN"
                  , "map": {"type": "var", "name": "lib action result"}
                  }
                ]
              , [ "TOOLCHAIN_DIR"
                , { "type": "lookup"
                  , "key": "TOOLCHAIN_DIR"
                  , "map": {"type": "var", "name": "lib action result"}
                  }
                ]
              , [ "NON_SYSTEM_TOOLS"
                , { "type": "lookup"
                  , "key": "NON_SYSTEM_TOOLS"
                  , "map": {"type": "var", "name": "lib action result"}
                  }
                ]
              , [ "ENV"
                , { "type": "lookup"
                  , "key": "ENV"
                  , "map": {"type": "var", "name": "lib action result"}
                  }
                ]
              ]
            , "body": {"type": "CALL_EXPRESSION", "name": "dwarf package"}
            }
          , "else": {"type": "empty_map"}
          }
        ]
      , ["lint-deps fieldnames", ["deps", "private-deps", "components"]]
      , [ "lint"
        , { "type": "if"
          , "cond": {"type": "var", "name": "LINT"}
          , "then": {"type": "CALL_EXPRESSION", "name": "lint"}
          }
        ]
      , [ "link-args"
        , { "type": "nub_right"
          , "$1":
            { "type": "++"
            , "$1":
              [ {"type": "keys", "$1": {"type": "var", "name": "lib"}}
              , {"type": "var", "name": "ldflags", "default": []}
              , {"type": "var", "name": "private-ldflags", "default": []}
              , {"type": "CALL_EXPRESSION", "name": "link-args-deps"}
              ]
            }
          }
        ]
      , ["run-libs", {"type": "CALL_EXPRESSION", "name": "run-libs-deps"}]
      , [ "run-libs-args"
        , {"type": "CALL_EXPRESSION", "name": "run-libs-args-deps"}
        ]
      , [ "ldflags-files"
        , {"type": "CALL_EXPRESSION", "name": "ldflags-files-deps"}
        ]
      , [ "debug-srcs"
        , { "type": "if"
          , "cond": {"type": "var", "name": "DEBUG"}
          , "then":
            { "type": "map_union"
            , "$1":
              [ { "type": "let*"
                , "bindings": [["deps-provider", "debug-srcs"]]
                , "body": {"type": "CALL_EXPRESSION", "name": "debug-deps"}
                }
              , {"type": "var", "name": "srcs"}
              , {"type": "var", "name": "private-hdrs"}
              , {"type": "var", "name": "hdrs"}
              ]
            }
          , "else": {"type": "empty_map"}
          }
        ]
      , [ "debug-hdrs"
        , { "type": "if"
          , "cond": {"type": "var", "name": "DEBUG"}
          , "then":
            { "type": "map_union"
            , "$1":
              [ { "type": "let*"
                , "bindings": [["deps-provider", "debug-hdrs"]]
                , "body": {"type": "CALL_EXPRESSION", "name": "debug-deps"}
                }
              , {"type": "var", "name": "hdrs"}
              ]
            }
          , "else": {"type": "empty_map"}
          }
        ]
      , ["deps-fieldnames", {"type": "var", "name": "public-fieldnames"}]
      , ["compile-deps", {"type": "CALL_EXPRESSION", "name": "compile-deps"}]
      , [ "compile-args"
        , { "type": "nub_right"
          , "$1":
            { "type": "++"
            , "$1":
              [ {"type": "var", "name": "cflags"}
              , {"type": "CALL_EXPRESSION", "name": "compile-args-deps"}
              ]
            }
          }
        ]
      , [ "cflags-files"
        , {"type": "CALL_EXPRESSION", "name": "cflags-files-deps"}
        ]
      , [ "package"
        , { "type": "let*"
          , "bindings": [["name", {"type": "var", "name": "pkg-name"}]]
          , "body":
            {"type": "env", "vars": ["name", "cflags-files", "ldflags-files"]}
          }
        ]
      ]
    , "body":
      { "type": "RESULT"
      , "artifacts": {"type": "var", "name": "lib"}
      , "runfiles": {"type": "var", "name": "hdrs"}
      , "provides":
        { "type": "map_union"
        , "$1":
          [ { "type": "env"
            , "vars":
              [ "compile-deps"
              , "compile-args"
              , "link-deps"
              , "link-args"
              , "run-libs"
              , "run-libs-args"
              , "package"
              , "debug-srcs"
              , "debug-hdrs"
              , "lint"
              , "dwarf-pkg"
              ]
            }
          , { "type": "var"
            , "name": "extra-provides"
            , "default": {"type": "empty_map"}
            }
          ]
        }
      }
    }
  }
, "shared artifact":
  { "doc": ["Provides the shared library artifact."]
  , "vars":
    [ "CC"
    , "CXX"
    , "CFLAGS"
    , "CXXFLAGS"
    , "LDFLAGS"
    , "ADD_CFLAGS"
    , "ADD_CXXFLAGS"
    , "ADD_LDFLAGS"
    , "ENV"
    , "DEBUG"
    , "name"
    , "pure C"
    , "srcs"
    , "hdrs"
    , "private-hdrs"
    , "soversion"
    , "compile-deps"
    , "compile-args"
    , "link-deps"
    , "link-args"
    , "run-libs"
    , "run-libs-args"
    , "cflags-files"
    , "ldflags-files"
    , "defaults-transition"
    , "component-fieldnames"
    , "deps-transition"
    , "modified-transitions"
    ]
  , "imports": {"shared action": "shared action"}
  , "expression":
    { "type": "lookup"
    , "key": "library"
    , "map": {"type": "CALL_EXPRESSION", "name": "shared action"}
    , "default": {"type": "empty_map"}
    }
  }
, "shared action":
  { "doc":
    [ "Run the action producing the shared artifact and pass it together with"
    , "related information to consumers."
    ]
  , "vars":
    [ "CC"
    , "CXX"
    , "CFLAGS"
    , "CXXFLAGS"
    , "LDFLAGS"
    , "ADD_CFLAGS"
    , "ADD_CXXFLAGS"
    , "ADD_LDFLAGS"
    , "ENV"
    , "DEBUG"
    , "name"
    , "pure C"
    , "srcs"
    , "hdrs"
    , "private-hdrs"
    , "soversion"
    , "compile-deps"
    , "compile-args"
    , "link-deps"
    , "link-args"
    , "run-libs"
    , "run-libs-args"
    , "cflags-files"
    , "ldflags-files"
    , "defaults-transition"
    , "component-fieldnames"
    , "deps-transition"
    , "modified-transitions"
    ]
  , "imports":
    { "compiler": "compiler"
    , "flags": "flags"
    , "objects": "objects"
    , "default-ENV": "default-ENV"
    , "default-PATH": "default-PATH"
    , "default-LDFLAGS": "default-LDFLAGS"
    , "default-TOOLCHAIN": "default-TOOLCHAIN"
    , "default-NON_SYSTEM_TOOLS": "default-NON_SYSTEM_TOOLS"
    , "add-fission-compile-flags": "add-fission-compile-flags"
    , "add-fission-link-flags": "add-fission-link-flags"
    }
  , "expression":
    { "type": "let*"
    , "bindings":
      [ ["BUILD_POSITION_INDEPENDENT", true]
      , ["TOOLCHAIN_DIR", "toolchain"]
      , ["TOOLCHAIN", {"type": "CALL_EXPRESSION", "name": "default-TOOLCHAIN"}]
      , [ "TOOLCHAIN"
        , { "type": "to_subdir"
          , "subdir": {"type": "var", "name": "TOOLCHAIN_DIR"}
          , "$1": {"type": "var", "name": "TOOLCHAIN"}
          }
        ]
      , [ "NON_SYSTEM_TOOLS"
        , {"type": "CALL_EXPRESSION", "name": "default-NON_SYSTEM_TOOLS"}
        ]
      , ["COMPILER", {"type": "CALL_EXPRESSION", "name": "compiler"}]
      , [ "COMPILE_FLAGS"
        , { "type": "++"
          , "$1":
            [ {"type": "CALL_EXPRESSION", "name": "flags"}
            , {"type": "var", "name": "compile-args"}
            ]
          }
        ]
      , [ "LDFLAGS"
        , { "type": "++"
          , "$1":
            [ { "type": "var"
              , "name": "LDFLAGS"
              , "default":
                {"type": "CALL_EXPRESSION", "name": "default-LDFLAGS"}
              }
            , {"type": "var", "name": "ADD_LDFLAGS", "default": []}
            ]
          }
        ]
      , [ "ENV"
        , { "type": "map_union"
          , "$1":
            [ {"type": "CALL_EXPRESSION", "name": "default-ENV"}
            , {"type": "var", "name": "ENV", "default": {"type": "empty_map"}}
            ]
          }
        ]
      , [ "ENV_PATH"
        , { "type": "lookup"
          , "map": {"type": "var", "name": "ENV"}
          , "key": "PATH"
          }
        ]
      , [ "ENV"
        , { "type": "map_union"
          , "$1":
            [ {"type": "var", "name": "ENV"}
            , { "type": "singleton_map"
              , "key": "PATH"
              , "value":
                { "type": "join"
                , "separator": ":"
                , "$1":
                  { "type": "++"
                  , "$1":
                    [ {"type": "CALL_EXPRESSION", "name": "default-PATH"}
                    , { "type": "if"
                      , "cond": {"type": "var", "name": "ENV_PATH"}
                      , "then": [{"type": "var", "name": "ENV_PATH"}]
                      }
                    ]
                  }
                }
              }
            ]
          }
        ]
      , ["objects result", {"type": "CALL_EXPRESSION", "name": "objects"}]
      , [ "objects"
        , { "type": "lookup"
          , "key": "objects"
          , "map":
            { "type": "var"
            , "name": "objects result"
            , "default": {"type": "empty_map"}
            }
          }
        ]
      , [ "compile flags"
        , {"type": "CALL_EXPRESSION", "name": "add-fission-compile-flags"}
        ]
      , [ "ld flags"
        , {"type": "CALL_EXPRESSION", "name": "add-fission-link-flags"}
        ]
      , [ "base name"
        , { "type": "if"
          , "cond":
            { "type": "or"
            , "$1":
              [ {"type": "var", "name": "objects"}
              , {"type": "var", "name": "link-deps"}
              ]
            }
          , "then":
            { "type": "assert_non_empty"
            , "msg": "A name has to be provided for non-header-only libraries"
            , "$1": {"type": "var", "name": "name"}
            }
          , "else": {"type": "var", "name": "name"}
          }
        ]
      , [ "libname"
        , { "type": "join"
          , "$1": ["lib", {"type": "var", "name": "base name"}, ".so"]
          }
        ]
      , [ "libname"
        , { "type": "join"
          , "separator": "."
          , "$1":
            { "type": "++"
            , "$1":
              [ [{"type": "var", "name": "libname"}]
              , {"type": "var", "name": "soversion"}
              ]
            }
          }
        ]
      , [ "lib"
        , { "type": "if"
          , "cond":
            { "type": "or"
            , "$1":
              [ {"type": "var", "name": "objects"}
              , {"type": "var", "name": "link-deps"}
              ]
            }
          , "else": {"type": "empty_map"}
          , "then":
            { "type": "ACTION"
            , "outs": [{"type": "var", "name": "libname"}]
            , "inputs":
              { "type": "map_union"
              , "$1":
                [ {"type": "var", "name": "TOOLCHAIN"}
                , {"type": "var", "name": "objects"}
                , {"type": "var", "name": "link-deps"}
                , {"type": "var", "name": "run-libs"}
                , { "type": "var"
                  , "name": "cflags-files"
                  , "default": {"type": "empty_map"}
                  }
                , { "type": "var"
                  , "name": "ldflags-files"
                  , "default": {"type": "empty_map"}
                  }
                ]
              }
            , "env":
              {"type": "var", "name": "ENV", "default": {"type": "empty_map"}}
            , "cmd":
              { "type": "++"
              , "$1":
                [ [ {"type": "var", "name": "COMPILER"}
                  , "-shared"
                  , "-Wl,-rpath,$ORIGIN"
                  , "-Wl,-rpath,$ORIGIN/../lib"
                  , { "type": "join"
                    , "$1":
                      ["-Wl,-soname,", {"type": "var", "name": "libname"}]
                    }
                  ]
                , {"type": "var", "name": "compile flags"}
                , ["-o", {"type": "var", "name": "libname"}]
                , {"type": "keys", "$1": {"type": "var", "name": "objects"}}
                , {"type": "var", "name": "link-args"}
                , {"type": "var", "name": "run-libs-args"}
                , {"type": "var", "name": "ld flags"}
                ]
              }
            }
          }
        ]
      ]
    , "body":
      { "type": "map_union"
      , "$1":
        [ { "type": "singleton_map"
          , "key": "library"
          , "value": {"type": "var", "name": "lib"}
          }
        , { "type": "singleton_map"
          , "key": "dwarf objects"
          , "value":
            { "type": "lookup"
            , "key": "dwarf objects"
            , "map":
              { "type": "var"
              , "name": "objects result"
              , "default": {"type": "empty_map"}
              }
            }
          }
        , { "type": "env"
          , "vars": ["TOOLCHAIN", "TOOLCHAIN_DIR", "NON_SYSTEM_TOOLS", "ENV"]
          }
        ]
      }
    }
  }
, "shared result":
  { "vars":
    [ "CC"
    , "CXX"
    , "CFLAGS"
    , "CXXFLAGS"
    , "LDFLAGS"
    , "ADD_CXXFLAGS"
    , "ADD_CFLAGS"
    , "ADD_LDFLAGS"
    , "ENV"
    , "DEBUG"
    , "LINT"
    , "name"
    , "pure C"
    , "srcs"
    , "hdrs"
    , "private-hdrs"
    , "cflags"
    , "private-cflags"
    , "ldflags"
    , "private-ldflags"
    , "soversion"
    , "pkg-name"
    , "extra-provides"
    , "defaults-transition"
    , "deps-transition"
    , "modified-transitions"
    , "public-fieldnames"
    , "private-fieldnames"
    , "component-fieldnames"
    ]
  , "imports":
    { "compile-deps": "compile-deps"
    , "compile-args-deps": "compile-args-deps"
    , "link-deps": "link-deps"
    , "link-args-deps": "link-args-deps"
    , "run-libs-deps": "run-libs-deps"
    , "run-libs-args-deps": "run-libs-args-deps"
    , "cflags-files-deps": "cflags-files-deps"
    , "ldflags-files-deps": "ldflags-files-deps"
    , "shared action": "shared action"
    , "debug-deps": "debug-deps"
    , "lint": "lint information"
    , "dwarf package": "dwarf package"
    }
  , "expression":
    { "type": "let*"
    , "bindings":
      [ ["deps-fieldnames", {"type": "var", "name": "private-fieldnames"}]
      , ["compile-deps", {"type": "CALL_EXPRESSION", "name": "compile-deps"}]
      , [ "compile-args"
        , { "type": "nub_right"
          , "$1":
            { "type": "++"
            , "$1":
              [ {"type": "var", "name": "cflags"}
              , {"type": "var", "name": "private-cflags"}
              , {"type": "CALL_EXPRESSION", "name": "compile-args-deps"}
              ]
            }
          }
        ]
      , [ "cflags-files"
        , {"type": "CALL_EXPRESSION", "name": "cflags-files-deps"}
        ]
      , ["link-deps", {"type": "CALL_EXPRESSION", "name": "link-deps"}]
      , ["link-args", {"type": "CALL_EXPRESSION", "name": "link-args-deps"}]
      , ["run-libs", {"type": "CALL_EXPRESSION", "name": "run-libs-deps"}]
      , [ "run-libs-args"
        , { "type": "nub_right"
          , "$1":
            { "type": "++"
            , "$1":
              [ {"type": "var", "name": "ldflags", "default": []}
              , {"type": "var", "name": "private-ldflags", "default": []}
              , {"type": "CALL_EXPRESSION", "name": "run-libs-args-deps"}
              ]
            }
          }
        ]
      , [ "ldflags-files"
        , {"type": "CALL_EXPRESSION", "name": "ldflags-files-deps"}
        ]
      , [ "lib action result"
        , {"type": "CALL_EXPRESSION", "name": "shared action"}
        ]
      , [ "lib"
        , { "type": "lookup"
          , "key": "library"
          , "map": {"type": "var", "name": "lib action result"}
          }
        ]
      , [ "dwarf objects"
        , { "type": "lookup"
          , "key": "dwarf objects"
          , "map": {"type": "var", "name": "lib action result"}
          }
        ]
      , ["dwarf deps", {"type": "empty_map"}]
      , [ "dwarf-pkg"
        , { "type": "if"
          , "cond":
            { "type": "and"
            , "$1":
              [ {"type": "var", "name": "dwarf objects"}
              , { "type": "lookup"
                , "key": "USE_DEBUG_FISSION"
                , "map":
                  { "type": "var"
                  , "name": "DEBUG"
                  , "default": {"type": "empty_map"}
                  }
                }
              ]
            }
          , "then":
            { "type": "let*"
            , "bindings":
              [ [ "TOOLCHAIN"
                , { "type": "lookup"
                  , "key": "TOOLCHAIN"
                  , "map": {"type": "var", "name": "lib action result"}
                  }
                ]
              , [ "TOOLCHAIN_DIR"
                , { "type": "lookup"
                  , "key": "TOOLCHAIN_DIR"
                  , "map": {"type": "var", "name": "lib action result"}
                  }
                ]
              , [ "NON_SYSTEM_TOOLS"
                , { "type": "lookup"
                  , "key": "NON_SYSTEM_TOOLS"
                  , "map": {"type": "var", "name": "lib action result"}
                  }
                ]
              , [ "ENV"
                , { "type": "lookup"
                  , "key": "ENV"
                  , "map": {"type": "var", "name": "lib action result"}
                  }
                ]
              ]
            , "body": {"type": "CALL_EXPRESSION", "name": "dwarf package"}
            }
          , "else": {"type": "empty_map"}
          }
        ]
      , [ "debug-srcs"
        , { "type": "if"
          , "cond": {"type": "var", "name": "DEBUG"}
          , "then":
            { "type": "map_union"
            , "$1":
              [ { "type": "let*"
                , "bindings": [["deps-provider", "debug-srcs"]]
                , "body": {"type": "CALL_EXPRESSION", "name": "debug-deps"}
                }
              , {"type": "var", "name": "srcs"}
              , {"type": "var", "name": "private-hdrs"}
              , {"type": "var", "name": "hdrs"}
              ]
            }
          , "else": {"type": "empty_map"}
          }
        ]
      , ["lint-deps fieldnames", ["deps", "private-deps", "components"]]
      , [ "lint"
        , { "type": "if"
          , "cond": {"type": "var", "name": "LINT"}
          , "then": {"type": "CALL_EXPRESSION", "name": "lint"}
          }
        ]
      , [ "debug-hdrs"
        , { "type": "if"
          , "cond": {"type": "var", "name": "DEBUG"}
          , "then":
            { "type": "map_union"
            , "$1":
              [ { "type": "let*"
                , "bindings": [["deps-provider", "debug-hdrs"]]
                , "body": {"type": "CALL_EXPRESSION", "name": "debug-deps"}
                }
              , {"type": "var", "name": "hdrs"}
              ]
            }
          , "else": {"type": "empty_map"}
          }
        ]
      , ["deps-fieldnames", {"type": "var", "name": "public-fieldnames"}]
      , ["compile-deps", {"type": "CALL_EXPRESSION", "name": "compile-deps"}]
      , [ "compile-args"
        , { "type": "nub_right"
          , "$1":
            { "type": "++"
            , "$1":
              [ {"type": "var", "name": "cflags"}
              , {"type": "CALL_EXPRESSION", "name": "compile-args-deps"}
              ]
            }
          }
        ]
      , [ "cflags-files"
        , {"type": "CALL_EXPRESSION", "name": "cflags-files-deps"}
        ]
      , ["link-deps", {"type": "empty_map"}]
      , ["link-args", []]
      , [ "run-libs"
        , { "type": "map_union"
          , "$1":
            [ {"type": "var", "name": "lib"}
            , {"type": "var", "name": "run-libs"}
            ]
          }
        ]
      , [ "run-libs-args"
        , { "type": "nub_right"
          , "$1":
            { "type": "++"
            , "$1":
              [ {"type": "keys", "$1": {"type": "var", "name": "lib"}}
              , {"type": "var", "name": "ldflags", "default": []}
              ]
            }
          }
        ]
      , [ "ldflags-files"
        , {"type": "CALL_EXPRESSION", "name": "ldflags-files-deps"}
        ]
      , [ "package"
        , { "type": "let*"
          , "bindings":
            [ ["name", {"type": "var", "name": "pkg-name"}]
            , [ "version"
              , { "type": "if"
                , "cond": {"type": "var", "name": "soversion"}
                , "then":
                  { "type": "join"
                  , "separator": "."
                  , "$1": {"type": "var", "name": "soversion"}
                  }
                , "else": null
                }
              ]
            ]
          , "body":
            { "type": "env"
            , "vars": ["name", "version", "cflags-files", "ldflags-files"]
            }
          }
        ]
      ]
    , "body":
      { "type": "RESULT"
      , "artifacts": {"type": "var", "name": "lib"}
      , "runfiles": {"type": "var", "name": "hdrs"}
      , "provides":
        { "type": "map_union"
        , "$1":
          [ { "type": "env"
            , "vars":
              [ "compile-deps"
              , "compile-args"
              , "link-deps"
              , "link-args"
              , "run-libs"
              , "run-libs-args"
              , "package"
              , "debug-srcs"
              , "debug-hdrs"
              , "lint"
              , "dwarf-pkg"
              ]
            }
          , { "type": "var"
            , "name": "extra-provides"
            , "default": {"type": "empty_map"}
            }
          ]
        }
      }
    }
  }
, "object artifacts":
  { "doc":
    [ "Get the relevant object artifacts and pass them together with related"
    , "information to consumers."
    ]
  , "vars":
    [ "CC"
    , "CXX"
    , "CFLAGS"
    , "CXXFLAGS"
    , "ADD_CFLAGS"
    , "ADD_CXXFLAGS"
    , "AR"
    , "ENV"
    , "BUILD_POSITION_INDEPENDENT"
    , "DEBUG"
    , "name"
    , "pure C"
    , "srcs"
    , "hdrs"
    , "private-hdrs"
    , "stage"
    , "compile-deps"
    , "compile-args"
    , "cflags-files"
    , "defaults-transition"
    , "modified-transitions"
    , "component-fieldnames"
    ]
  , "imports":
    { "compiler": "compiler"
    , "flags": "flags"
    , "objects": "objects"
    , "default-AR": "default-AR"
    , "default-ENV": "default-ENV"
    , "default-PATH": "default-PATH"
    , "default-TOOLCHAIN": "default-TOOLCHAIN"
    , "default-NON_SYSTEM_TOOLS": "default-NON_SYSTEM_TOOLS"
    }
  , "expression":
    { "type": "let*"
    , "bindings":
      [ ["TOOLCHAIN_DIR", "toolchain"]
      , ["TOOLCHAIN", {"type": "CALL_EXPRESSION", "name": "default-TOOLCHAIN"}]
      , [ "TOOLCHAIN"
        , { "type": "to_subdir"
          , "subdir": {"type": "var", "name": "TOOLCHAIN_DIR"}
          , "$1": {"type": "var", "name": "TOOLCHAIN"}
          }
        ]
      , [ "NON_SYSTEM_TOOLS"
        , {"type": "CALL_EXPRESSION", "name": "default-NON_SYSTEM_TOOLS"}
        ]
      , ["COMPILER", {"type": "CALL_EXPRESSION", "name": "compiler"}]
      , [ "COMPILE_FLAGS"
        , { "type": "++"
          , "$1":
            [ {"type": "CALL_EXPRESSION", "name": "flags"}
            , {"type": "var", "name": "compile-args"}
            ]
          }
        ]
      , [ "ENV"
        , { "type": "map_union"
          , "$1":
            [ {"type": "CALL_EXPRESSION", "name": "default-ENV"}
            , {"type": "var", "name": "ENV", "default": {"type": "empty_map"}}
            ]
          }
        ]
      , [ "ENV_PATH"
        , { "type": "lookup"
          , "map": {"type": "var", "name": "ENV"}
          , "key": "PATH"
          }
        ]
      , [ "ENV"
        , { "type": "map_union"
          , "$1":
            [ {"type": "var", "name": "ENV"}
            , { "type": "singleton_map"
              , "key": "PATH"
              , "value":
                { "type": "join"
                , "separator": ":"
                , "$1":
                  { "type": "++"
                  , "$1":
                    [ {"type": "CALL_EXPRESSION", "name": "default-PATH"}
                    , { "type": "if"
                      , "cond": {"type": "var", "name": "ENV_PATH"}
                      , "then": [{"type": "var", "name": "ENV_PATH"}]
                      }
                    ]
                  }
                }
              }
            ]
          }
        ]
      ]
    , "body":
      { "type": "map_union"
      , "$1":
        [ {"type": "CALL_EXPRESSION", "name": "objects"}
        , { "type": "env"
          , "vars": ["TOOLCHAIN", "TOOLCHAIN_DIR", "NON_SYSTEM_TOOLS", "ENV"]
          }
        ]
      }
    }
  }
, "object result":
  { "vars":
    [ "CC"
    , "CXX"
    , "CFLAGS"
    , "CXXFLAGS"
    , "ADD_CFLAGS"
    , "ADD_CXXFLAGS"
    , "AR"
    , "DWP"
    , "ENV"
    , "BUILD_POSITION_INDEPENDENT"
    , "BUILD_OBJECT_ONLY_DROP_OBJECT_LINKING"
    , "DEBUG"
    , "LINT"
    , "name"
    , "pure C"
    , "srcs"
    , "hdrs"
    , "private-hdrs"
    , "cflags"
    , "private-cflags"
    , "ldflags"
    , "private-ldflags"
    , "stage"
    , "pkg-name"
    , "extra-provides"
    , "public-fieldnames"
    , "private-fieldnames"
    , "component-fieldnames"
    , "deps-transition"
    , "modified-transitions"
    , "defaults-transition"
    ]
  , "imports":
    { "compile-deps": "compile-deps"
    , "compile-args-deps": "compile-args-deps"
    , "link-deps": "link-deps"
    , "link-args-deps": "link-args-deps"
    , "run-libs-deps": "run-libs-deps"
    , "run-libs-args-deps": "run-libs-args-deps"
    , "cflags-files-deps": "cflags-files-deps"
    , "ldflags-files-deps": "ldflags-files-deps"
    , "object artifacts": "object artifacts"
    , "debug-deps": "debug-deps"
    , "lint": "lint information"
    , "dwarf package": "dwarf package"
    }
  , "expression":
    { "type": "let*"
    , "bindings":
      [ ["deps-fieldnames", {"type": "var", "name": "private-fieldnames"}]
      , ["compile-deps", {"type": "CALL_EXPRESSION", "name": "compile-deps"}]
      , [ "compile-args"
        , { "type": "nub_right"
          , "$1":
            { "type": "++"
            , "$1":
              [ {"type": "var", "name": "cflags"}
              , {"type": "var", "name": "private-cflags"}
              , {"type": "CALL_EXPRESSION", "name": "compile-args-deps"}
              ]
            }
          }
        ]
      , [ "cflags-files"
        , {"type": "CALL_EXPRESSION", "name": "cflags-files-deps"}
        ]
      , ["link-deps", {"type": "CALL_EXPRESSION", "name": "link-deps"}]
      , [ "object artifacts with env"
        , {"type": "CALL_EXPRESSION", "name": "object artifacts"}
        ]
      , [ "objects"
        , { "type": "lookup"
          , "key": "objects"
          , "map": {"type": "var", "name": "object artifacts with env"}
          }
        ]
      , [ "dwarf objects"
        , { "type": "lookup"
          , "key": "dwarf objects"
          , "map": {"type": "var", "name": "object artifacts with env"}
          }
        ]
      , ["dwarf deps", {"type": "empty_map"}]
      , [ "dwarf-pkg"
        , { "type": "if"
          , "cond":
            { "type": "and"
            , "$1":
              [ {"type": "var", "name": "dwarf objects"}
              , { "type": "lookup"
                , "key": "USE_DEBUG_FISSION"
                , "map":
                  { "type": "var"
                  , "name": "DEBUG"
                  , "default": {"type": "empty_map"}
                  }
                }
              ]
            }
          , "then":
            { "type": "let*"
            , "bindings":
              [ [ "TOOLCHAIN"
                , { "type": "lookup"
                  , "key": "TOOLCHAIN"
                  , "map": {"type": "var", "name": "object artifacts with env"}
                  }
                ]
              , [ "TOOLCHAIN_DIR"
                , { "type": "lookup"
                  , "key": "TOOLCHAIN_DIR"
                  , "map": {"type": "var", "name": "object artifacts with env"}
                  }
                ]
              , [ "NON_SYSTEM_TOOLS"
                , { "type": "lookup"
                  , "key": "NON_SYSTEM_TOOLS"
                  , "map": {"type": "var", "name": "object artifacts with env"}
                  }
                ]
              , [ "ENV"
                , { "type": "lookup"
                  , "key": "ENV"
                  , "map": {"type": "var", "name": "object artifacts with env"}
                  }
                ]
              ]
            , "body": {"type": "CALL_EXPRESSION", "name": "dwarf package"}
            }
          , "else": {"type": "empty_map"}
          }
        ]
      , ["lint-deps fieldnames", ["deps", "private-deps", "components"]]
      , [ "lint"
        , { "type": "if"
          , "cond": {"type": "var", "name": "LINT"}
          , "then": {"type": "CALL_EXPRESSION", "name": "lint"}
          }
        ]
      , [ "link-args"
        , { "type": "nub_right"
          , "$1":
            { "type": "++"
            , "$1":
              [ { "type": "if"
                , "cond":
                  { "type": "var"
                  , "name": "BUILD_OBJECT_ONLY_DROP_OBJECT_LINKING"
                  }
                , "then": []
                , "else":
                  {"type": "keys", "$1": {"type": "var", "name": "objects"}}
                }
              , {"type": "var", "name": "ldflags", "default": []}
              , {"type": "var", "name": "private-ldflags", "default": []}
              , {"type": "CALL_EXPRESSION", "name": "link-args-deps"}
              ]
            }
          }
        ]
      , ["run-libs", {"type": "CALL_EXPRESSION", "name": "run-libs-deps"}]
      , [ "run-libs-args"
        , { "type": "nub_right"
          , "$1": {"type": "CALL_EXPRESSION", "name": "run-libs-args-deps"}
          }
        ]
      , [ "ldflags-files"
        , {"type": "CALL_EXPRESSION", "name": "ldflags-files-deps"}
        ]
      , [ "debug-srcs"
        , { "type": "if"
          , "cond": {"type": "var", "name": "DEBUG"}
          , "then":
            { "type": "map_union"
            , "$1":
              [ { "type": "let*"
                , "bindings": [["deps-provider", "debug-srcs"]]
                , "body": {"type": "CALL_EXPRESSION", "name": "debug-deps"}
                }
              , {"type": "var", "name": "srcs"}
              , {"type": "var", "name": "private-hdrs"}
              , {"type": "var", "name": "hdrs"}
              ]
            }
          , "else": {"type": "empty_map"}
          }
        ]
      , [ "debug-hdrs"
        , { "type": "if"
          , "cond": {"type": "var", "name": "DEBUG"}
          , "then":
            { "type": "map_union"
            , "$1":
              [ { "type": "let*"
                , "bindings": [["deps-provider", "debug-hdrs"]]
                , "body": {"type": "CALL_EXPRESSION", "name": "debug-deps"}
                }
              , {"type": "var", "name": "hdrs"}
              ]
            }
          , "else": {"type": "empty_map"}
          }
        ]
      , ["deps-fieldnames", {"type": "var", "name": "public-fieldnames"}]
      , ["compile-deps", {"type": "CALL_EXPRESSION", "name": "compile-deps"}]
      , [ "compile-args"
        , { "type": "nub_right"
          , "$1":
            { "type": "++"
            , "$1":
              [ {"type": "var", "name": "cflags"}
              , {"type": "CALL_EXPRESSION", "name": "compile-args-deps"}
              ]
            }
          }
        ]
      , [ "cflags-files"
        , {"type": "CALL_EXPRESSION", "name": "cflags-files-deps"}
        ]
      , [ "package"
        , { "type": "let*"
          , "bindings": [["name", {"type": "var", "name": "pkg-name"}]]
          , "body":
            {"type": "env", "vars": ["name", "cflags-files", "ldflags-files"]}
          }
        ]
      ]
    , "body":
      { "type": "RESULT"
      , "artifacts": {"type": "var", "name": "objects"}
      , "runfiles": {"type": "var", "name": "hdrs"}
      , "provides":
        { "type": "map_union"
        , "$1":
          [ { "type": "env"
            , "vars":
              [ "compile-deps"
              , "compile-args"
              , "link-deps"
              , "link-args"
              , "run-libs"
              , "run-libs-args"
              , "package"
              , "debug-srcs"
              , "debug-hdrs"
              , "lint"
              , "dwarf-pkg"
              ]
            }
          , { "type": "var"
            , "name": "extra-provides"
            , "default": {"type": "empty_map"}
            }
          ]
        }
      }
    }
  }
, "bin artifact":
  { "doc": ["Provides the linked binary."]
  , "vars":
    [ "CC"
    , "CXX"
    , "CFLAGS"
    , "CXXFLAGS"
    , "LDFLAGS"
    , "ADD_CFLAGS"
    , "ADD_CXXFLAGS"
    , "ADD_LDFLAGS"
    , "ENV"
    , "BUILD_POSITION_INDEPENDENT"
    , "DEBUG"
    , "name"
    , "pure C"
    , "srcs"
    , "private-hdrs"
    , "stage"
    , "compile-deps"
    , "compile-args"
    , "link-deps"
    , "link-args"
    , "run-libs"
    , "run-libs-args"
    , "cflags-files"
    , "ldflags-files"
    , "defaults-transition"
    ]
  , "imports": {"bin action": "bin action"}
  , "expression":
    { "type": "lookup"
    , "key": "binary"
    , "map": {"type": "CALL_EXPRESSION", "name": "bin action"}
    , "default": {"type": "empty_map"}
    }
  }
, "bin action":
  { "doc":
    [ "Run the action producing the binary artifact and pass it together with"
    , "related information to consumers."
    ]
  , "vars":
    [ "CC"
    , "CXX"
    , "CFLAGS"
    , "CXXFLAGS"
    , "LDFLAGS"
    , "ADD_CFLAGS"
    , "ADD_CXXFLAGS"
    , "ADD_LDFLAGS"
    , "ENV"
    , "BUILD_POSITION_INDEPENDENT"
    , "DEBUG"
    , "name"
    , "pure C"
    , "srcs"
    , "private-hdrs"
    , "stage"
    , "compile-deps"
    , "compile-args"
    , "link-deps"
    , "link-args"
    , "run-libs"
    , "run-libs-args"
    , "cflags-files"
    , "ldflags-files"
    , "defaults-transition"
    ]
  , "imports":
    { "compiler": "compiler"
    , "flags": "flags"
    , "objects": "objects"
    , "default-ENV": "default-ENV"
    , "default-PATH": "default-PATH"
    , "default-LDFLAGS": "default-LDFLAGS"
    , "default-TOOLCHAIN": "default-TOOLCHAIN"
    , "default-NON_SYSTEM_TOOLS": "default-NON_SYSTEM_TOOLS"
    , "add-fission-compile-flags": "add-fission-compile-flags"
    , "add-fission-link-flags": "add-fission-link-flags"
    }
  , "expression":
    { "type": "let*"
    , "bindings":
      [ ["TOOLCHAIN_DIR", "toolchain"]
      , ["TOOLCHAIN", {"type": "CALL_EXPRESSION", "name": "default-TOOLCHAIN"}]
      , [ "TOOLCHAIN"
        , { "type": "to_subdir"
          , "subdir": {"type": "var", "name": "TOOLCHAIN_DIR"}
          , "$1": {"type": "var", "name": "TOOLCHAIN"}
          }
        ]
      , [ "NON_SYSTEM_TOOLS"
        , {"type": "CALL_EXPRESSION", "name": "default-NON_SYSTEM_TOOLS"}
        ]
      , ["COMPILER", {"type": "CALL_EXPRESSION", "name": "compiler"}]
      , [ "COMPILE_FLAGS"
        , { "type": "++"
          , "$1":
            [ {"type": "CALL_EXPRESSION", "name": "flags"}
            , {"type": "var", "name": "compile-args"}
            ]
          }
        ]
      , [ "LDFLAGS"
        , { "type": "++"
          , "$1":
            [ { "type": "var"
              , "name": "LDFLAGS"
              , "default":
                {"type": "CALL_EXPRESSION", "name": "default-LDFLAGS"}
              }
            , {"type": "var", "name": "ADD_LDFLAGS", "default": []}
            ]
          }
        ]
      , [ "ENV"
        , { "type": "map_union"
          , "$1":
            [ {"type": "CALL_EXPRESSION", "name": "default-ENV"}
            , {"type": "var", "name": "ENV", "default": {"type": "empty_map"}}
            ]
          }
        ]
      , [ "ENV_PATH"
        , { "type": "lookup"
          , "map": {"type": "var", "name": "ENV"}
          , "key": "PATH"
          }
        ]
      , [ "ENV"
        , { "type": "map_union"
          , "$1":
            [ {"type": "var", "name": "ENV"}
            , { "type": "singleton_map"
              , "key": "PATH"
              , "value":
                { "type": "join"
                , "separator": ":"
                , "$1":
                  { "type": "++"
                  , "$1":
                    [ {"type": "CALL_EXPRESSION", "name": "default-PATH"}
                    , { "type": "if"
                      , "cond": {"type": "var", "name": "ENV_PATH"}
                      , "then": [{"type": "var", "name": "ENV_PATH"}]
                      }
                    ]
                  }
                }
              }
            ]
          }
        ]
      , ["hdrs", {"type": "empty_map"}]
      , ["objects result", {"type": "CALL_EXPRESSION", "name": "objects"}]
      , [ "objects"
        , { "type": "lookup"
          , "key": "objects"
          , "map":
            { "type": "var"
            , "name": "objects result"
            , "default": {"type": "empty_map"}
            }
          }
        ]
      , [ "compile flags"
        , {"type": "CALL_EXPRESSION", "name": "add-fission-compile-flags"}
        ]
      , [ "ld flags"
        , {"type": "CALL_EXPRESSION", "name": "add-fission-link-flags"}
        ]
      , [ "link-args"
        , { "type": "nub_right"
          , "$1":
            { "type": "++"
            , "$1":
              [ {"type": "keys", "$1": {"type": "var", "name": "objects"}}
              , {"type": "var", "name": "link-args"}
              ]
            }
          }
        ]
      , [ "binpath"
        , { "type": "if"
          , "cond": {"type": "var", "name": "stage"}
          , "then":
            { "type": "join"
            , "separator": "/"
            , "$1":
              [ {"type": "var", "name": "stage"}
              , {"type": "var", "name": "name"}
              ]
            }
          , "else": {"type": "var", "name": "name"}
          }
        ]
      , [ "binpath (in work)"
        , {"type": "join", "$1": ["work/", {"type": "var", "name": "binpath"}]}
        ]
      , ["TOOLCHAIN_DIR", "../toolchain"]
      , ["COMPILER", {"type": "CALL_EXPRESSION", "name": "compiler"}]
      , [ "ENV"
        , { "type": "map_union"
          , "$1":
            [ {"type": "var", "name": "ENV"}
            , { "type": "singleton_map"
              , "key": "PATH"
              , "value":
                { "type": "join"
                , "separator": ":"
                , "$1":
                  { "type": "++"
                  , "$1":
                    [ {"type": "CALL_EXPRESSION", "name": "default-PATH"}
                    , { "type": "if"
                      , "cond": {"type": "var", "name": "ENV_PATH"}
                      , "then": [{"type": "var", "name": "ENV_PATH"}]
                      }
                    ]
                  }
                }
              }
            ]
          }
        ]
      , [ "cmd"
        , { "type": "++"
          , "$1":
            [ [ {"type": "var", "name": "COMPILER"}
              , "-Wl,-rpath,$ORIGIN"
              , "-Wl,-rpath,$ORIGIN/../lib"
              , "-o"
              , {"type": "var", "name": "binpath"}
              ]
            , {"type": "var", "name": "compile flags"}
            , {"type": "var", "name": "link-args"}
            , {"type": "var", "name": "run-libs-args"}
            , {"type": "var", "name": "ld flags"}
            ]
          }
        ]
      , [ "binary (in work)"
        , { "type": "ACTION"
          , "outs": [{"type": "var", "name": "binpath (in work)"}]
          , "inputs":
            { "type": "disjoint_map_union"
            , "$1":
              [ {"type": "var", "name": "TOOLCHAIN"}
              , { "type": "to_subdir"
                , "subdir": "work"
                , "$1":
                  { "type": "disjoint_map_union"
                  , "$1":
                    [ {"type": "var", "name": "objects"}
                    , {"type": "var", "name": "link-deps"}
                    , {"type": "var", "name": "run-libs"}
                    , { "type": "var"
                      , "name": "cflags-files"
                      , "default": {"type": "empty_map"}
                      }
                    , { "type": "var"
                      , "name": "ldflags-files"
                      , "default": {"type": "empty_map"}
                      }
                    ]
                  }
                }
              ]
            }
          , "cmd": {"type": "var", "name": "cmd"}
          , "cwd": "work"
          , "env": {"type": "var", "name": "ENV"}
          }
        ]
      , [ "binary"
        , { "type": "singleton_map"
          , "key": {"type": "var", "name": "binpath"}
          , "value":
            { "type": "lookup"
            , "map": {"type": "var", "name": "binary (in work)"}
            , "key": {"type": "var", "name": "binpath (in work)"}
            }
          }
        ]
      ]
    , "body":
      { "type": "map_union"
      , "$1":
        [ { "type": "singleton_map"
          , "key": "binary"
          , "value": {"type": "var", "name": "binary"}
          }
        , { "type": "singleton_map"
          , "key": "dwarf objects"
          , "value":
            { "type": "lookup"
            , "key": "dwarf objects"
            , "map":
              { "type": "var"
              , "name": "objects result"
              , "default": {"type": "empty_map"}
              }
            }
          }
        , { "type": "env"
          , "vars": ["TOOLCHAIN", "TOOLCHAIN_DIR", "NON_SYSTEM_TOOLS", "ENV"]
          }
        ]
      }
    }
  }
, "bin result":
  { "doc": ["Produces the binary target result."]
  , "vars":
    [ "CC"
    , "CXX"
    , "CFLAGS"
    , "CXXFLAGS"
    , "LDFLAGS"
    , "ADD_CFLAGS"
    , "ADD_CXXFLAGS"
    , "ADD_LDFLAGS"
    , "ENV"
    , "BUILD_POSITION_INDEPENDENT"
    , "DEBUG"
    , "LINT"
    , "name"
    , "pure C"
    , "srcs"
    , "private-hdrs"
    , "private-cflags"
    , "private-ldflags"
    , "stage"
    , "private-fieldnames"
    , "component-fieldnames"
    ]
  , "imports":
    { "compile-deps": "compile-deps"
    , "compile-args-deps": "compile-args-deps"
    , "link-deps": "link-deps"
    , "link-args-deps": "link-args-deps"
    , "run-libs-deps": "run-libs-deps"
    , "run-libs-args-deps": "run-libs-args-deps"
    , "cflags-files-deps": "cflags-files-deps"
    , "ldflags-files-deps": "ldflags-files-deps"
    , "bin action": "bin action"
    , "debug-deps": "debug-deps"
    , "lint": "lint information"
    , "dwarf package": "dwarf package"
    }
  , "expression":
    { "type": "let*"
    , "bindings":
      [ ["deps-fieldnames", {"type": "var", "name": "private-fieldnames"}]
      , ["compile-deps", {"type": "CALL_EXPRESSION", "name": "compile-deps"}]
      , [ "compile-args"
        , { "type": "++"
          , "$1":
            [ {"type": "CALL_EXPRESSION", "name": "compile-args-deps"}
            , {"type": "var", "name": "private-cflags"}
            ]
          }
        ]
      , ["link-deps", {"type": "CALL_EXPRESSION", "name": "link-deps"}]
      , [ "link-args"
        , { "type": "nub_right"
          , "$1":
            { "type": "++"
            , "$1":
              [ {"type": "var", "name": "private-ldflags"}
              , {"type": "CALL_EXPRESSION", "name": "link-args-deps"}
              ]
            }
          }
        ]
      , ["run-libs", {"type": "CALL_EXPRESSION", "name": "run-libs-deps"}]
      , [ "run-libs-args"
        , {"type": "CALL_EXPRESSION", "name": "run-libs-args-deps"}
        ]
      , [ "cflags-files"
        , {"type": "CALL_EXPRESSION", "name": "cflags-files-deps"}
        ]
      , [ "ldflags-files"
        , {"type": "CALL_EXPRESSION", "name": "ldflags-files-deps"}
        ]
      , ["package", {"type": "singleton_map", "key": "to_bin", "value": true}]
      , [ "debug-srcs"
        , { "type": "if"
          , "cond": {"type": "var", "name": "DEBUG"}
          , "then":
            { "type": "map_union"
            , "$1":
              [ { "type": "let*"
                , "bindings": [["deps-provider", "debug-srcs"]]
                , "body": {"type": "CALL_EXPRESSION", "name": "debug-deps"}
                }
              , {"type": "var", "name": "srcs"}
              , {"type": "var", "name": "private-hdrs"}
              ]
            }
          , "else": {"type": "empty_map"}
          }
        ]
      , [ "debug-hdrs"
        , { "type": "if"
          , "cond": {"type": "var", "name": "DEBUG"}
          , "then":
            { "type": "map_union"
            , "$1":
              [ { "type": "let*"
                , "bindings": [["deps-provider", "debug-hdrs"]]
                , "body": {"type": "CALL_EXPRESSION", "name": "debug-deps"}
                }
              , {"type": "var", "name": "compile-deps"}
              ]
            }
          , "else": {"type": "empty_map"}
          }
        ]
      , [ "lint"
        , { "type": "if"
          , "cond": {"type": "var", "name": "LINT"}
          , "then":
            { "type": "let*"
            , "bindings":
              [ ["hdrs", {"type": "empty_map"}]
              , ["lint-deps fieldnames", ["private-deps"]]
              ]
            , "body": {"type": "CALL_EXPRESSION", "name": "lint"}
            }
          }
        ]
      , [ "bin action result"
        , {"type": "CALL_EXPRESSION", "name": "bin action"}
        ]
      , [ "binary"
        , { "type": "lookup"
          , "key": "binary"
          , "map": {"type": "var", "name": "bin action result"}
          }
        ]
      , [ "dwarf objects"
        , { "type": "lookup"
          , "key": "dwarf objects"
          , "map": {"type": "var", "name": "bin action result"}
          }
        ]
      , [ "dwarf deps"
        , { "type": "if"
          , "cond":
            { "type": "and"
            , "$1":
              [ {"type": "var", "name": "dwarf objects"}
              , { "type": "lookup"
                , "key": "USE_DEBUG_FISSION"
                , "map":
                  { "type": "var"
                  , "name": "DEBUG"
                  , "default": {"type": "empty_map"}
                  }
                }
              ]
            }
          , "else": {"type": "empty_map"}
          , "then":
            { "type": "let*"
            , "bindings": [["deps-provider", "dwarf-pkg"]]
            , "body": {"type": "CALL_EXPRESSION", "name": "debug-deps"}
            }
          }
        ]
      , [ "dwarf-pkg"
        , { "type": "if"
          , "cond":
            { "type": "and"
            , "$1":
              [ {"type": "var", "name": "dwarf objects"}
              , { "type": "lookup"
                , "key": "USE_DEBUG_FISSION"
                , "map":
                  { "type": "var"
                  , "name": "DEBUG"
                  , "default": {"type": "empty_map"}
                  }
                }
              ]
            }
          , "then":
            { "type": "let*"
            , "bindings":
              [ [ "TOOLCHAIN"
                , { "type": "lookup"
                  , "key": "TOOLCHAIN"
                  , "map": {"type": "var", "name": "bin action result"}
                  }
                ]
              , [ "TOOLCHAIN_DIR"
                , { "type": "lookup"
                  , "key": "TOOLCHAIN_DIR"
                  , "map": {"type": "var", "name": "bin action result"}
                  }
                ]
              , [ "NON_SYSTEM_TOOLS"
                , { "type": "lookup"
                  , "key": "NON_SYSTEM_TOOLS"
                  , "map": {"type": "var", "name": "bin action result"}
                  }
                ]
              , [ "ENV"
                , { "type": "lookup"
                  , "key": "ENV"
                  , "map": {"type": "var", "name": "bin action result"}
                  }
                ]
              ]
            , "body": {"type": "CALL_EXPRESSION", "name": "dwarf package"}
            }
          , "else": {"type": "empty_map"}
          }
        ]
      ]
    , "body":
      { "type": "RESULT"
      , "artifacts": {"type": "var", "name": "binary"}
      , "provides":
        { "type": "env"
        , "vars":
          [ "run-libs"
          , "package"
          , "debug-srcs"
          , "debug-hdrs"
          , "lint"
          , "dwarf-pkg"
          ]
        }
      }
    }
  }
, "install-with-deps stage":
  { "vars":
    [ "pc-install-dir"
    , "targets"
    , "prefix"
    , "flat-libs"
    , "hdrs-only"
    , "skip-debug-stage"
    ]
  , "imports":
    { "compile-deps": "compile-deps"
    , "compile-args-deps": "compile-args-deps"
    , "link-deps": "link-deps"
    , "link-args-deps": "link-args-deps"
    , "run-libs-deps": "run-libs-deps"
    , "run-libs-args-deps": "run-libs-args-deps"
    , "pkg-config": "pkg-config"
    }
  , "expression":
    { "type": "let*"
    , "bindings":
      [ [ "install-stage"
        , { "type": "disjoint_map_union"
          , "msg": "install stages may not overlap"
          , "$1":
            { "type": "foreach"
            , "var": "target"
            , "range": {"type": "var", "name": "targets"}
            , "body":
              { "type": "let*"
              , "bindings":
                [ [ "runfiles"
                  , { "type": "DEP_RUNFILES"
                    , "dep": {"type": "var", "name": "target"}
                    , "default": {"type": "empty_map"}
                    }
                  ]
                , [ "compile-deps"
                  , { "type": "DEP_PROVIDES"
                    , "dep": {"type": "var", "name": "target"}
                    , "provider": "compile-deps"
                    , "default": {"type": "empty_map"}
                    }
                  ]
                , [ "headers"
                  , { "type": "disjoint_map_union"
                    , "msg": "headers may not overlap"
                    , "$1":
                      [ {"type": "var", "name": "runfiles"}
                      , {"type": "var", "name": "compile-deps"}
                      ]
                    }
                  ]
                , [ "debug-srcs"
                  , { "type": "if"
                    , "cond": {"type": "var", "name": "skip-debug-stage"}
                    , "then": {"type": "empty_map"}
                    , "else":
                      { "type": "DEP_PROVIDES"
                      , "dep": {"type": "var", "name": "target"}
                      , "provider": "debug-srcs"
                      , "default": {"type": "empty_map"}
                      }
                    }
                  ]
                , [ "debug-hdrs"
                  , { "type": "if"
                    , "cond": {"type": "var", "name": "skip-debug-stage"}
                    , "then": {"type": "empty_map"}
                    , "else":
                      { "type": "DEP_PROVIDES"
                      , "dep": {"type": "var", "name": "target"}
                      , "provider": "debug-hdrs"
                      , "default": {"type": "empty_map"}
                      }
                    }
                  ]
                , [ "dwarf-pkg"
                  , { "type": "if"
                    , "cond": {"type": "var", "name": "skip-debug-stage"}
                    , "then": {"type": "empty_map"}
                    , "else":
                      { "type": "DEP_PROVIDES"
                      , "dep": {"type": "var", "name": "target"}
                      , "provider": "dwarf-pkg"
                      , "default": {"type": "empty_map"}
                      }
                    }
                  ]
                ]
              , "body":
                { "type": "if"
                , "cond": {"type": "var", "name": "hdrs-only"}
                , "then": {"type": "var", "name": "headers"}
                , "else":
                  { "type": "let*"
                  , "bindings":
                    [ [ "artifacts"
                      , { "type": "map_union"
                        , "$1":
                          [ { "type": "DEP_ARTIFACTS"
                            , "dep": {"type": "var", "name": "target"}
                            , "default": {"type": "empty_map"}
                            }
                          , {"type": "var", "name": "dwarf-pkg"}
                          ]
                        }
                      ]
                    , [ "link-deps"
                      , { "type": "DEP_PROVIDES"
                        , "dep": {"type": "var", "name": "target"}
                        , "provider": "link-deps"
                        , "default": {"type": "empty_map"}
                        }
                      ]
                    , [ "run-libs"
                      , { "type": "DEP_PROVIDES"
                        , "dep": {"type": "var", "name": "target"}
                        , "provider": "run-libs"
                        , "default": {"type": "empty_map"}
                        }
                      ]
                    , [ "package"
                      , { "type": "DEP_PROVIDES"
                        , "dep": {"type": "var", "name": "target"}
                        , "provider": "package"
                        , "default": {"type": "empty_map"}
                        }
                      ]
                    , [ "to_bin"
                      , { "type": "lookup"
                        , "key": "to_bin"
                        , "map": {"type": "var", "name": "package"}
                        }
                      ]
                    , [ "binaries"
                      , { "type": "if"
                        , "cond": {"type": "var", "name": "to_bin"}
                        , "then": {"type": "var", "name": "artifacts"}
                        , "else": {"type": "empty_map"}
                        }
                      ]
                    , [ "libraries"
                      , { "type": "disjoint_map_union"
                        , "msg": "libraries may not overlap"
                        , "$1":
                          { "type": "++"
                          , "$1":
                            [ { "type": "if"
                              , "cond": {"type": "var", "name": "to_bin"}
                              , "then": []
                              , "else": [{"type": "var", "name": "artifacts"}]
                              }
                            , [{"type": "var", "name": "link-deps"}]
                            , [{"type": "var", "name": "run-libs"}]
                            ]
                          }
                        }
                      ]
                    , [ "pkg-name"
                      , { "type": "lookup"
                        , "key": "name"
                        , "map": {"type": "var", "name": "package"}
                        }
                      ]
                    , [ "pkg-config"
                      , { "type": "if"
                        , "cond": {"type": "var", "name": "pkg-name"}
                        , "then":
                          { "type": "let*"
                          , "bindings":
                            [ ["pkg-prefix", {"type": "var", "name": "prefix"}]
                            , [ "pkg-version"
                              , { "type": "lookup"
                                , "key": "version"
                                , "map": {"type": "var", "name": "package"}
                                }
                              ]
                            , [ "pkg-cflags"
                              , { "type": "DEP_PROVIDES"
                                , "dep": {"type": "var", "name": "target"}
                                , "provider": "compile-args"
                                , "default": []
                                }
                              ]
                            , [ "pkg-ldflags"
                              , { "type": "++"
                                , "$1":
                                  [ { "type": "DEP_PROVIDES"
                                    , "dep": {"type": "var", "name": "target"}
                                    , "provider": "link-args"
                                    , "default": []
                                    }
                                  , { "type": "DEP_PROVIDES"
                                    , "dep": {"type": "var", "name": "target"}
                                    , "provider": "run-libs-args"
                                    , "default": []
                                    }
                                  ]
                                }
                              ]
                            , [ "pkg-flag-files"
                              , { "type": "map_union"
                                , "$1":
                                  [ { "type": "lookup"
                                    , "key": "cflags-files"
                                    , "map": {"type": "var", "name": "package"}
                                    , "default": {"type": "empty_map"}
                                    }
                                  , { "type": "lookup"
                                    , "key": "ldflags-files"
                                    , "map": {"type": "var", "name": "package"}
                                    , "default": {"type": "empty_map"}
                                    }
                                  ]
                                }
                              ]
                            , [ "pkg-libs"
                              , {"type": "var", "name": "libraries"}
                              ]
                            , [ "flat-libs"
                              , {"type": "var", "name": "flat-libs"}
                              ]
                            ]
                          , "body":
                            { "type": "map_union"
                            , "$1":
                              [ { "type": "CALL_EXPRESSION"
                                , "name": "pkg-config"
                                }
                              , {"type": "var", "name": "pkg-flag-files"}
                              ]
                            }
                          }
                        , "else": {"type": "empty_map"}
                        }
                      ]
                    ]
                  , "body":
                    { "type": "map_union"
                    , "$1":
                      [ { "type": "to_subdir"
                        , "subdir": "bin"
                        , "flat": true
                        , "msg": "install binaries may not overlap"
                        , "$1": {"type": "var", "name": "binaries"}
                        }
                      , { "type": "to_subdir"
                        , "subdir": "include"
                        , "$1":
                          { "type": "map_union"
                          , "$1":
                            [ {"type": "var", "name": "headers"}
                            , {"type": "var", "name": "debug-hdrs"}
                            ]
                          }
                        }
                      , { "type": "to_subdir"
                        , "subdir": "lib"
                        , "flat": {"type": "var", "name": "flat-libs"}
                        , "msg": "install libraries may not overlap"
                        , "$1": {"type": "var", "name": "libraries"}
                        }
                      , { "type": "to_subdir"
                        , "subdir": {"type": "var", "name": "pc-install-dir"}
                        , "$1": {"type": "var", "name": "pkg-config"}
                        }
                      , { "type": "to_subdir"
                        , "subdir": "work"
                        , "$1": {"type": "var", "name": "debug-srcs"}
                        }
                      ]
                    }
                  }
                }
              }
            }
          }
        ]
      ]
    , "body": {"type": "var", "name": "install-stage"}
    }
  }
, "install-with-deps result":
  { "vars":
    [ "pc-install-dir"
    , "targets"
    , "prefix"
    , "flat-libs"
    , "hdrs-only"
    , "skip-debug-stage"
    ]
  , "imports": {"install stage": "install-with-deps stage"}
  , "expression":
    { "type": "RESULT"
    , "artifacts": {"type": "CALL_EXPRESSION", "name": "install stage"}
    }
  }
}