Add Clang 20.1.0

3 files changed, 92 insertions, 1 deletions

diff --git a/etc/patches/TARGETS b/etc/patches/TARGETS
index f52388c..aacebe8 100644
--- a/etc/patches/TARGETS
+++ b/etc/patches/TARGETS
@@ -8,4 +8,5 @@
 , "clang-17": {"type": "install", "deps": [["TREE", null, "clang-17"]]}
 , "clang-18": {"type": "install", "deps": [["TREE", null, "clang-18"]]}
 , "clang-19": {"type": "install", "deps": [["TREE", null, "clang-19"]]}
+, "clang-20": {"type": "install", "deps": [["TREE", null, "clang-20"]]}
 }
diff --git a/etc/patches/clang-20/libcxx-musl-support.patch b/etc/patches/clang-20/libcxx-musl-support.patch
new file mode 100644
index 0000000..96cf13d
--- /dev/null
+++ b/etc/patches/clang-20/libcxx-musl-support.patch
@@ -0,0 +1,59 @@
+From cfceef12ffa2963ffc32a0e2797dfc7e5ff7a2ac Mon Sep 17 00:00:00 2001
+From: Oliver Reiche <oliver.reiche@huawei.com>
+Date: Fri, 21 Mar 2025 13:10:23 +0200
+Subject: [PATCH] libcxx: Add musl support for __locale
+
+... which does not provide a known rune table and uses
+missing locale-based string to integer conversion functions.
+---
+ libcxx/include/__locale | 32 ++++++++++++++++++++++++++++++++
+ 1 file changed, 32 insertions(+)
+
+diff --git a/libcxx/include/__locale_dir/locale_base_api.h b/libcxx/include/__locale_dir/locale_base_api.h
+index c1e73ca..3ece532 100644
+--- a/libcxx/include/__locale_dir/locale_base_api.h
++++ b/libcxx/include/__locale_dir/locale_base_api.h
+@@ -133,6 +133,40 @@
+ #    include <__locale_dir/locale_base_api/openbsd.h>
+ #  elif defined(__wasi__) || _LIBCPP_HAS_MUSL_LIBC
+ #    include <__locale_dir/locale_base_api/musl.h>
++#  else
++     // Detect musl libc (inspired by musl detection from gcc's config.guess)
++#    include <features.h>
++#    if !(defined(__UCLIBC__) || defined(__dietlibc__) || defined(__GLIBC__))
++#      include <stdarg.h>
++#      ifdef __DEFINED_va_list
++#        ifndef __MUSL_LIBC__
++#          define __MUSL_LIBC__
++#        endif
++#      endif
++#    endif
++
++#    ifdef __MUSL_LIBC__
++#      include <clocale>
++#      include <cstdlib>
++       // Fall back to default rune table for musl libc
++#      ifndef _LIBCPP_PROVIDES_DEFAULT_RUNE_TABLE
++#        define _LIBCPP_PROVIDES_DEFAULT_RUNE_TABLE
++#      endif
++       // Implement missing strto*_l functions for musl libc
++#      define __MUSL_LIBC_CREATE_STRTOX_L(X) \
++         static inline auto \
++         strto ## X ## _l(const char* str, char** end, int base, locale_t l) { \
++           locale_t old = uselocale(l); \
++           auto result = strto ## X(str, end, base); \
++           uselocale(old); \
++           return result; \
++         }
++       __MUSL_LIBC_CREATE_STRTOX_L(l)
++       __MUSL_LIBC_CREATE_STRTOX_L(ll)
++       __MUSL_LIBC_CREATE_STRTOX_L(ul)
++       __MUSL_LIBC_CREATE_STRTOX_L(ull)
++#      undef __MUSL_LIBC_CREATE_STRTOX_L
++#    endif
+ #  endif
+ 
+ #  include <__locale_dir/locale_base_api/bsd_locale_fallbacks.h>
+-- 
+2.30.2
+
diff --git a/etc/repos.json b/etc/repos.json
index dab8c31..c77def8 100644
--- a/etc/repos.json
+++ b/etc/repos.json
@@ -510,6 +510,23 @@
       , "iwyu": "iwyu-19"
       }
     }
+  , "compilers/clang-20.1.0-native":
+    { "repository":
+      { "type": "archive"
+      , "content": "459410a5cbe900b5653ead14ca39808f57d24f4f"
+      , "fetch": "https://github.com/llvm/llvm-project/archive/refs/tags/llvmorg-20.1.0.tar.gz"
+      , "sha256": "08bc382733777dda3c96259e3732ff96c1df98d0470c4f85b163274eae687f4f"
+      , "subdir": "llvm-project-llvmorg-20.1.0"
+      , "pragma": {"special": "resolve-partially"}
+      }
+    , "target_root": "compilers"
+    , "target_file_name": "clang-20-native.TARGETS"
+    , "bindings":
+      { "rules": "rules/clang_with_gcc14"
+      , "binutils": "imports/binutils-latest"
+      , "patches": "patches"
+      }
+    }
   , "tools/busybox-1.36.1":
     { "repository":
       { "type": "archive"
@@ -606,7 +623,12 @@
   , "clang-latest-native":
     { "repository": "toolchains"
     , "target_file_name": "clang.TARGETS"
-    , "bindings": {"rules": "rules", "clang": "compilers/clang-19.1.1-native"}
+    , "bindings": {"rules": "rules", "clang": "compilers/clang-20.1.0-native"}
+    }
+  , "clang-20.1.0-native":
+    { "repository": "toolchains"
+    , "target_file_name": "clang.TARGETS"
+    , "bindings": {"rules": "rules", "clang": "compilers/clang-20.1.0-native"}
     }
   , "clang-19.1.1-native":
     { "repository": "toolchains"
@@ -751,6 +773,15 @@
       , "compiler": "clang-latest-native"
       }
     }
+  , "clang-20.1.0-native+tools":
+    { "repository": "toolchains"
+    , "target_file_name": "compiler+tools.TARGETS"
+    , "bindings":
+      { "rules": "rules"
+      , "tools": "tools-all"
+      , "compiler": "clang-20.1.0-native"
+      }
+    }
   , "clang-19.1.1-native+tools":
     { "repository": "toolchains"
     , "target_file_name": "compiler+tools.TARGETS"