Merge commit 'e75f101e8b988adb458e594ffaaaebc0c01f65df' into rules-cc

6 files changed, 614 insertions, 98 deletions

diff --git a/rules/CC/EXPRESSIONS b/rules/CC/EXPRESSIONS
index cfbce42..5a425c7 100644
--- a/rules/CC/EXPRESSIONS
+++ b/rules/CC/EXPRESSIONS
@@ -333,6 +333,151 @@
       }
     }
   }
+, "pkg-map-provider-deps":
+  { "doc": ["Collect maps from provider \"package\" for given target_fields"]
+  , "vars": ["pkg-key", "deps-fieldnames", "deps-transition"]
+  , "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."]
+    }
+  , "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": "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"]
+  , "vars_doc":
+    { "deps-fieldnames": ["List of target_field names to collect files from."]
+    , "deps-transition":
+      ["The optional configuration transition for the targets."]
+    }
+  , "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"]
+  , "vars_doc":
+    { "deps-fieldnames": ["List of target_field names to collect files from."]
+    , "deps-transition":
+      ["The optional configuration transition for the targets."]
+    }
+  , "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"]
+  , "imports": {"contains": ["", "contains"]}
+  , "expression":
+    { "type": "let*"
+    , "bindings":
+      [["list", {"type": "keys", "$1": {"type": "var", "name": "pkg-libs"}}]]
+    , "body":
+      { "type": "foreach"
+      , "var": "item"
+      , "range": {"type": "var", "name": "pkg-ldflags"}
+      , "body":
+        { "type": "if"
+        , "cond": {"type": "CALL_EXPRESSION", "name": "contains"}
+        , "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"]
+  , "imports": {"contains": ["", "contains"]}
+  , "expression":
+    { "type": "let*"
+    , "bindings":
+      [ [ "list"
+        , {"type": "keys", "$1": {"type": "var", "name": "pkg-flag-files"}}
+        ]
+      , ["list_prefix", "@"]
+      ]
+    , "body":
+      { "type": "foreach"
+      , "var": "item"
+      , "range": {"type": "var", "name": "flags"}
+      , "body":
+        { "type": "let*"
+        , "bindings":
+          [["flag-file", {"type": "CALL_EXPRESSION", "name": "contains"}]]
+        , "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"
@@ -340,103 +485,97 @@
     , "pkg-version"
     , "pkg-cflags"
     , "pkg-ldflags"
+    , "pkg-flag-files"
     , "pkg-libs"
     , "flat-libs"
+    , "pc-install-dir"
     ]
-  , "imports": {"contains": ["", "contains"]}
+  , "imports":
+    { "pkg-prefix-lib-paths": "pkg-prefix-lib-paths"
+    , "pkg-prefix-flag-paths": "pkg-prefix-flag-paths"
+    }
   , "expression":
-    { "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": " "
-            , "$1":
-              { "type": "++"
+    { "type": "let*"
+    , "bindings":
+      [ ["lib-prefix", "${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"
               , "$1":
-                [ ["Cflags:", "-I${includedir}"]
-                , {"type": "var", "name": "pkg-cflags"}
+                [ "prefix="
+                , {"type": "var", "name": "pkg-prefix", "default": "/"}
                 ]
               }
-            }
-          , { "type": "join"
-            , "separator": " "
-            , "$1":
-              { "type": "++"
+            , "libdir=${prefix}/lib"
+            , "includedir=${prefix}/include"
+            , { "type": "join"
+              , "$1": ["Name: ", {"type": "var", "name": "pkg-name"}]
+              }
+            , { "type": "join"
               , "$1":
-                [ ["Libs:"]
-                , { "type": "if"
-                  , "cond": {"type": "var", "name": "flat-libs"}
-                  , "then": ["-L${libdir}"]
-                  }
-                , { "type": "let*"
-                  , "bindings":
-                    [ [ "list"
-                      , { "type": "keys"
-                        , "$1": {"type": "var", "name": "pkg-libs"}
-                        }
-                      ]
-                    ]
-                  , "body":
-                    { "type": "foreach"
-                    , "var": "item"
-                    , "range": {"type": "var", "name": "pkg-ldflags"}
-                    , "body":
-                      { "type": "if"
-                      , "cond": {"type": "CALL_EXPRESSION", "name": "contains"}
-                      , "then":
-                        { "type": "join"
-                        , "$1":
-                          { "type": "if"
-                          , "cond": {"type": "var", "name": "flat-libs"}
-                          , "then":
-                            [ "-l:"
-                            , { "type": "basename"
-                              , "$1": {"type": "var", "name": "item"}
-                              }
-                            ]
-                          , "else":
-                            ["${libdir}/", {"type": "var", "name": "item"}]
-                          }
-                        }
-                      , "else": {"type": "var", "name": "item"}
-                      }
-                    }
-                  }
+                [ "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"}
+                  ]
+                }
+              }
+            ]
+          }
         }
       }
     }
@@ -450,6 +589,7 @@
     , "hdrs"
     , "private-hdrs"
     , "compile-deps"
+    , "cflags-files"
     ]
   , "expression":
     { "type": "let*"
@@ -503,6 +643,10 @@
                     , "key": {"type": "var", "name": "work src_name"}
                     , "value": {"type": "var", "name": "src_val"}
                     }
+                  , { "type": "var"
+                    , "name": "cflags-files"
+                    , "default": {"type": "empty_map"}
+                    }
                   ]
                 }
               ]
@@ -671,6 +815,7 @@
     , "stage"
     , "compile-deps"
     , "compile-args"
+    , "cflags-files"
     , "defaults-transition"
     ]
   , "imports":
@@ -804,6 +949,8 @@
     , "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 artifact": "lib artifact"
     }
   , "expression":
@@ -823,6 +970,9 @@
             }
           }
         ]
+      , [ "cflags-files"
+        , {"type": "CALL_EXPRESSION", "name": "cflags-files-deps"}
+        ]
       , ["link-deps", {"type": "CALL_EXPRESSION", "name": "link-deps"}]
       , ["lib", {"type": "CALL_EXPRESSION", "name": "lib artifact"}]
       , [ "link-args"
@@ -844,6 +994,9 @@
           , "$1": {"type": "CALL_EXPRESSION", "name": "run-libs-args-deps"}
           }
         ]
+      , [ "ldflags-files"
+        , {"type": "CALL_EXPRESSION", "name": "ldflags-files-deps"}
+        ]
       , ["deps-fieldnames", {"type": "var", "name": "public-fieldnames"}]
       , ["compile-deps", {"type": "CALL_EXPRESSION", "name": "compile-deps"}]
       , [ "compile-args"
@@ -857,10 +1010,14 @@
             }
           }
         ]
+      , [ "cflags-files"
+        , {"type": "CALL_EXPRESSION", "name": "cflags-files-deps"}
+        ]
       , [ "package"
-        , { "type": "singleton_map"
-          , "key": "name"
-          , "value": {"type": "var", "name": "pkg-name"}
+        , { "type": "let*"
+          , "bindings": [["name", {"type": "var", "name": "pkg-name"}]]
+          , "body":
+            {"type": "env", "vars": ["name", "cflags-files", "ldflags-files"]}
           }
         ]
       ]
@@ -914,6 +1071,8 @@
     , "link-args"
     , "run-libs"
     , "run-libs-args"
+    , "cflags-files"
+    , "ldflags-files"
     , "defaults-transition"
     ]
   , "imports":
@@ -1005,6 +1164,14 @@
                 [ {"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":
@@ -1070,6 +1237,8 @@
     , "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 artifact": "shared artifact"
     }
   , "expression":
@@ -1089,6 +1258,9 @@
             }
           }
         ]
+      , [ "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"}]
@@ -1104,6 +1276,9 @@
             }
           }
         ]
+      , [ "ldflags-files"
+        , {"type": "CALL_EXPRESSION", "name": "ldflags-files-deps"}
+        ]
       , ["lib", {"type": "CALL_EXPRESSION", "name": "shared artifact"}]
       , ["deps-fieldnames", {"type": "var", "name": "public-fieldnames"}]
       , ["compile-deps", {"type": "CALL_EXPRESSION", "name": "compile-deps"}]
@@ -1118,6 +1293,9 @@
             }
           }
         ]
+      , [ "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"
@@ -1140,6 +1318,9 @@
             }
           }
         ]
+      , [ "ldflags-files"
+        , {"type": "CALL_EXPRESSION", "name": "ldflags-files-deps"}
+        ]
       , [ "package"
         , { "type": "let*"
           , "bindings":
@@ -1156,7 +1337,10 @@
                 }
               ]
             ]
-          , "body": {"type": "env", "vars": ["name", "version"]}
+          , "body":
+            { "type": "env"
+            , "vars": ["name", "version", "cflags-files", "ldflags-files"]
+            }
           }
         ]
       ]
@@ -1211,6 +1395,8 @@
     , "link-args"
     , "run-libs"
     , "run-libs-args"
+    , "cflags-files"
+    , "ldflags-files"
     , "defaults-transition"
     ]
   , "imports":
@@ -1295,6 +1481,14 @@
               [ {"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":
@@ -1348,6 +1542,8 @@
     , "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"
     , "binary": "bin artifact"
     }
   , "expression":
@@ -1379,6 +1575,12 @@
       , [ "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}]
       ]
     , "body":
diff --git a/rules/CC/RULES b/rules/CC/RULES
index 91fcf3d..730d45b 100644
--- a/rules/CC/RULES
+++ b/rules/CC/RULES
@@ -624,7 +624,8 @@
   , "expression":
     { "type": "let*"
     , "bindings":
-      [ [ "install-stage"
+      [ ["pc-install-dir", "share/pkgconfig"]
+      , [ "install-stage"
         , { "type": "disjoint_map_union"
           , "msg": "install stages may not overlap"
           , "$1":
@@ -770,11 +771,32 @@
                               ]
                             }
                           ]
+                        , [ "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": "FIELD", "name": "flat-libs"}]
                         ]
                       , "body":
-                        {"type": "CALL_EXPRESSION", "name": "pkg-config"}
+                        { "type": "map_union"
+                        , "$1":
+                          [ {"type": "CALL_EXPRESSION", "name": "pkg-config"}
+                          , {"type": "var", "name": "pkg-flag-files"}
+                          ]
+                        }
                       }
                     , "else": {"type": "empty_map"}
                     }
@@ -800,7 +822,7 @@
                     , "$1": {"type": "var", "name": "libraries"}
                     }
                   , { "type": "to_subdir"
-                    , "subdir": "share/pkgconfig"
+                    , "subdir": {"type": "var", "name": "pc-install-dir"}
                     , "$1": {"type": "var", "name": "pkg-config"}
                     }
                   ]
diff --git a/rules/CC/prebuilt/EXPRESSIONS b/rules/CC/prebuilt/EXPRESSIONS
index ca576f4..fc901d7 100644
--- a/rules/CC/prebuilt/EXPRESSIONS
+++ b/rules/CC/prebuilt/EXPRESSIONS
@@ -88,13 +88,16 @@
   }
 , "prebuilt result":
   { "vars":
-    [ "name"
+    [ "ENV"
+    , "name"
     , "version"
     , "stage"
     , "cflags"
     , "ldflags"
     , "libs"
     , "hdrs"
+    , "config_reader"
+    , "pkg-configs"
     , "deps-fieldnames"
     ]
   , "imports":
@@ -105,6 +108,9 @@
     , "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"]
+    , "default-ENV": ["./", "..", "default-ENV"]
     }
   , "expression":
     { "type": "let*"
@@ -225,6 +231,179 @@
             }
           }
         ]
+      , [ "ENV"
+        , { "type": "map_union"
+          , "$1":
+            { "type": "++"
+            , "$1":
+              [ {"type": "CALL_EXPRESSION", "name": "default-ENV"}
+              , [ { "type": "var"
+                  , "name": "ENV"
+                  , "default": {"type": "empty_map"}
+                  }
+                ]
+              ]
+            }
+          }
+        ]
+      , [ "main-pkg-config"
+        , { "type": "foldl"
+          , "range": {"type": "var", "name": "pkg-configs", "default": []}
+          , "start": null
+          , "accum_var": "name"
+          , "var": "config"
+          , "body":
+            { "type": "if"
+            , "cond": {"type": "var", "name": "name"}
+            , "then": {"type": "var", "name": "name"}
+            , "else":
+              { "type": "join"
+              , "$1": {"type": "keys", "$1": {"type": "var", "name": "config"}}
+              }
+            }
+          }
+        ]
+      , [ "reader-inputs"
+        , { "type": "to_subdir"
+          , "subdir": "lib"
+          , "$1":
+            { "type": "map_union"
+            , "$1":
+              [ {"type": "var", "name": "libs"}
+              , { "type": "to_subdir"
+                , "subdir": "pkgconfig"
+                , "flat": true
+                , "$1":
+                  { "type": "map_union"
+                  , "$1": {"type": "var", "name": "pkg-configs", "default": []}
+                  }
+                }
+              ]
+            }
+          }
+        ]
+      , [ "cflags-filename"
+        , {"type": "join", "$1": [{"type": "var", "name": "name"}, ".cflags"]}
+        ]
+      , [ "cflags-file"
+        , { "type": "to_subdir"
+          , "subdir": {"type": "var", "name": "stage"}
+          , "$1":
+            { "type": "if"
+            , "cond": {"type": "var", "name": "pkg-configs"}
+            , "then":
+              { "type": "ACTION"
+              , "inputs":
+                { "type": "map_union"
+                , "$1":
+                  [ {"type": "var", "name": "config_reader"}
+                  , {"type": "var", "name": "reader-inputs"}
+                  ]
+                }
+              , "cmd":
+                [ "./config_reader"
+                , {"type": "var", "name": "cflags-filename"}
+                , {"type": "var", "name": "main-pkg-config"}
+                ]
+              , "env": {"type": "var", "name": "ENV"}
+              , "outs": [{"type": "var", "name": "cflags-filename"}]
+              }
+            , "else": {"type": "empty_map"}
+            }
+          }
+        ]
+      , [ "cflags-files"
+        , { "type": "map_union"
+          , "$1":
+            [ {"type": "CALL_EXPRESSION", "name": "cflags-files-deps"}
+            , {"type": "var", "name": "cflags-file"}
+            ]
+          }
+        ]
+      , [ "compile-args"
+        , { "type": "++"
+          , "$1":
+            [ {"type": "var", "name": "compile-args"}
+            , { "type": "if"
+              , "cond": {"type": "var", "name": "cflags-file"}
+              , "then":
+                [ { "type": "join"
+                  , "$1":
+                    { "type": "++"
+                    , "$1":
+                      [ ["@"]
+                      , { "type": "keys"
+                        , "$1": {"type": "var", "name": "cflags-file"}
+                        }
+                      ]
+                    }
+                  }
+                ]
+              }
+            ]
+          }
+        ]
+      , [ "ldflags-filename"
+        , {"type": "join", "$1": [{"type": "var", "name": "name"}, ".ldflags"]}
+        ]
+      , [ "ldflags-file"
+        , { "type": "to_subdir"
+          , "subdir": {"type": "var", "name": "stage"}
+          , "$1":
+            { "type": "if"
+            , "cond": {"type": "var", "name": "pkg-configs"}
+            , "then":
+              { "type": "ACTION"
+              , "inputs":
+                { "type": "map_union"
+                , "$1":
+                  [ {"type": "var", "name": "config_reader"}
+                  , {"type": "var", "name": "reader-inputs"}
+                  ]
+                }
+              , "cmd":
+                [ "./config_reader"
+                , {"type": "var", "name": "ldflags-filename"}
+                , {"type": "var", "name": "main-pkg-config"}
+                ]
+              , "env": {"type": "var", "name": "ENV"}
+              , "outs": [{"type": "var", "name": "ldflags-filename"}]
+              }
+            , "else": {"type": "empty_map"}
+            }
+          }
+        ]
+      , [ "ldflags-files"
+        , { "type": "map_union"
+          , "$1":
+            [ {"type": "CALL_EXPRESSION", "name": "ldflags-files-deps"}
+            , {"type": "var", "name": "ldflags-file"}
+            ]
+          }
+        ]
+      , [ "run-libs-args"
+        , { "type": "++"
+          , "$1":
+            [ {"type": "var", "name": "run-libs-args"}
+            , { "type": "if"
+              , "cond": {"type": "var", "name": "ldflags-file"}
+              , "then":
+                [ { "type": "join"
+                  , "$1":
+                    { "type": "++"
+                    , "$1":
+                      [ ["@"]
+                      , { "type": "keys"
+                        , "$1": {"type": "var", "name": "ldflags-file"}
+                        }
+                      ]
+                    }
+                  }
+                ]
+              }
+            ]
+          }
+        ]
       , [ "package"
         , { "type": "let*"
           , "bindings":
@@ -241,7 +420,10 @@
                 }
               ]
             ]
-          , "body": {"type": "env", "vars": ["name", "version"]}
+          , "body":
+            { "type": "env"
+            , "vars": ["name", "version", "cflags-files", "ldflags-files"]
+            }
           }
         ]
       ]
diff --git a/rules/CC/prebuilt/RULES b/rules/CC/prebuilt/RULES
index be2bacc..16f9f26 100644
--- a/rules/CC/prebuilt/RULES
+++ b/rules/CC/prebuilt/RULES
@@ -1,8 +1,13 @@
 { "library":
   { "doc": ["A prebuilt C++ library"]
-  , "target_fields": ["lib", "hdrs", "deps"]
+  , "target_fields": ["lib", "hdrs", "deps", "pkg-config"]
   , "string_fields":
     ["name", "version", "stage", "defines", "cflags", "ldflags"]
+  , "implicit":
+    { "defaults": [["./", "..", "defaults"]]
+    , "config_reader": [["CC", "prebuilt/read_pkgconfig.py"]]
+    }
+  , "config_vars": ["ENV"]
   , "field_doc":
     { "name":
       [ "The name of the library (without leading \"lib\" or trailing file name"
@@ -32,6 +37,13 @@
       ["List of compile flags set for this target and its consumers."]
     , "ldflags":
       ["Additional linker flags (typically for linking system libraries)."]
+    , "pkg-config":
+      [ "Pkg-config file for optional infer of public cflags and ldflags. If"
+      , "multiple files are specified (e.g., one depends on the other), the"
+      , "first one is used as entry. Note that if this field is non-empty the"
+      , "tool \"pkg-config\" must be available in \"PATH\", which is taken"
+      , "from [\"CC\", \"defaults\"] or the \"ENV\" variable."
+      ]
     }
   , "artifacts_doc":
     [ "The actual library (libname.a or libname.so). Only static libraries are"
@@ -67,7 +79,9 @@
       ]
     }
   , "imports":
-    { "artifacts_list": ["./", "../..", "field_artifacts_list"]
+    { "artifacts": ["./", "../..", "field_artifacts"]
+    , "artifacts_list": ["./", "../..", "field_artifacts_list"]
+    , "stage_field": ["", "stage_singleton_field"]
     , "prebuilt result": "prebuilt result"
     }
   , "expression":
@@ -112,6 +126,19 @@
           , "body": {"type": "CALL_EXPRESSION", "name": "artifacts_list"}
           }
         ]
+      , [ "config_reader"
+        , { "type": "let*"
+          , "bindings":
+            [["fieldname", "config_reader"], ["location", "config_reader"]]
+          , "body": {"type": "CALL_EXPRESSION", "name": "stage_field"}
+          }
+        ]
+      , [ "pkg-configs"
+        , { "type": "let*"
+          , "bindings": [["fieldname", "pkg-config"]]
+          , "body": {"type": "CALL_EXPRESSION", "name": "artifacts_list"}
+          }
+        ]
       , ["deps-fieldnames", ["deps"]]
       ]
     , "body": {"type": "CALL_EXPRESSION", "name": "prebuilt result"}
diff --git a/rules/CC/prebuilt/read_pkgconfig.py b/rules/CC/prebuilt/read_pkgconfig.py
new file mode 100755
index 0000000..cb4154f
--- /dev/null
+++ b/rules/CC/prebuilt/read_pkgconfig.py
@@ -0,0 +1,75 @@
+#!/usr/bin/env python3
+# Copyright 2023 Huawei Cloud Computing Technology Co., Ltd.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import os
+import subprocess
+import sys
+from pathlib import Path
+
+
+def run_pkgconfig(args: list[str], env: dict[str, str]) -> str:
+    result = subprocess.run(["pkg-config"] + args, env=env, capture_output=True)
+    if result.returncode != 0:
+        print(result.stderr.decode("utf-8"), file=sys.stderr)
+        exit(1)
+    return result.stdout.decode("utf-8").strip()
+
+
+def read_ldflags(pkg: str, env: dict[str, str]) -> str:
+    def libname(filename: str) -> str:
+        return filename.split(".")[0]
+
+    local_libs = {
+        libname(f)
+        for it in os.walk(".") for f in it[2] if f.startswith("lib")
+    }
+
+    link_flags = run_pkgconfig(["--libs-only-l", pkg], env).split(" ")
+
+    # deduplicate, keep right-most
+    seen: set[str] = set()
+    link_flags = [
+        f for f in link_flags[::-1] if f not in seen and not seen.add(f)
+    ][::-1]
+
+    def is_local(flag: str) -> bool:
+        if not flag.startswith("-l"):
+            return False
+        lib = libname(flag[3:]) if flag.startswith("-l:") else f"lib{flag[2:]}"
+        return lib in local_libs
+
+    return " ".join([f for f in link_flags if not is_local(f)])
+
+
+def read_pkgconfig():
+    if len(sys.argv) < 3:
+        print(f"usage: read_pkgconfig OUT_NAME PC_FILE")
+        exit(1)
+
+    name = sys.argv[1]
+    pkg = Path(sys.argv[2]).stem
+    env = dict(os.environ, PKG_CONFIG_PATH="./lib/pkgconfig")
+
+    if name.endswith(".cflags"):
+        data = run_pkgconfig(["--cflags-only-other", pkg], env)
+    else:
+        data = read_ldflags(pkg, env)
+
+    with open(f"{name}", 'w') as f:
+        f.write(data)
+
+
+if __name__ == "__main__":
+    read_pkgconfig()
diff --git a/rules/CC/test/RULES b/rules/CC/test/RULES
index 60f33ab..b46d6b0 100644
--- a/rules/CC/test/RULES
+++ b/rules/CC/test/RULES
@@ -115,6 +115,8 @@
     , "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"]
     , "binary": ["./", "..", "bin artifact"]
     , "host transition": ["transitions", "for host"]
     }
@@ -163,6 +165,9 @@
       , ["defaults-transition", {"type": "var", "name": "host-trans"}]
       , ["deps-transition", {"type": "var", "name": "host-trans"}]
       , ["deps-fieldnames", ["private-deps"]]
+      , [ "cflags-files"
+        , {"type": "CALL_EXPRESSION", "name": "cflags-files-deps"}
+        ]
       , ["compile-deps", {"type": "CALL_EXPRESSION", "name": "compile-deps"}]
       , [ "compile-args"
         , { "type": "++"
@@ -178,6 +183,9 @@
             ]
           }
         ]
+      , [ "ldflags-files"
+        , {"type": "CALL_EXPRESSION", "name": "ldflags-files-deps"}
+        ]
       , ["link-deps", {"type": "CALL_EXPRESSION", "name": "link-deps"}]
       , [ "link-args"
         , { "type": "++"