andreas pushed a commit to branch core-packages-team
in repository guix.

commit 93b2b2f41eaf56573db32d4f4a14e6b98ab37ea1
Author: Janneke Nieuwenhuizen <jann...@gnu.org>
AuthorDate: Sat Dec 14 22:40:14 2024 +0100

    gnu: clang-runtime-18: Build with gcc-12.
    
    Avoid
    
        
source/build/lib/fuzzer/libcxx_fuzzer_x86_64/include/c++/v1/__filesystem/path.h:534:52:
 error: use of built-in trait ‘__remove_pointer(typename 
std::__Fuzzer::decay<_Tp>::type)’ in function signature; use library traits 
instead
    
    by reverting back to gcc-12.
    
    * gnu/packages/llvm.scm (clang-runtime-from-llvm)[native-inputs]: Use gcc-12
    for version 18.
    
    Change-Id: Ib01403665af7a8014e6da612bc6f31257e498d88
---
 gnu/packages/llvm.scm | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/gnu/packages/llvm.scm b/gnu/packages/llvm.scm
index f22ff3d12e..1de4eb94ef 100644
--- a/gnu/packages/llvm.scm
+++ b/gnu/packages/llvm.scm
@@ -157,7 +157,13 @@ as \"x86_64-linux\"."
            (patches (map search-patch patches)))
          (llvm-monorepo (package-version llvm))))
     (build-system cmake-build-system)
-    (native-inputs (package-native-inputs llvm))
+    (native-inputs
+     (cond ((version>=? version "18")
+            ;; clang-18.1.8 doesn't build with gcc-14
+            ;; 
source/build/lib/fuzzer/libcxx_fuzzer_x86_64/include/c++/v1/__filesystem/path.h:534:52:
 error: use of built-in trait ‘__remove_pointer(typename 
std::__Fuzzer::decay<_Tp>::type)’ in function signature; use library traits 
instead
+            (modify-inputs (package-native-inputs llvm)
+              (prepend gcc-12)))
+           (else (package-native-inputs llvm))))
     (inputs
      (append
       (list llvm)

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