use system clang

Author: rscharfe

.github/workflows/main.yml

@@ -115,7 +115,7 @@ jobs:
       matrix:
         vector:
           - jobname: osx-clang
-            cc: clang
+            cc: /usr/bin/clang
             pool: macos-14
           - jobname: osx-reftable
             cc: clang
@@ -151,7 +151,7 @@ jobs:
           return 0;
         }
         EOF
-        for compiler in gcc clang
+        for compiler in gcc /usr/bin/clang
         do
           echo "$compiler:"
           $compiler -o x x.c && ./x