Default to clang compiler on macOS

diff --git a/test/run b/test/run
index bf4155b2f83b385f198e2c55660a49cc91fa3a5b..0f3ff97a803f1cea05f75e8656c5de5d98e46a62 100755 (executable)
--- a/test/run
+++ b/test/run
@@ -451,6 +451,8 @@ export PATH
 
 if [ -n "$CC" ]; then
     COMPILER="$CC"
+elif [[ "$OSTYPE" == "darwin"* && -x "$(command -v clang)" ]]; then
+    COMPILER=clang
 else
     COMPILER=gcc
 fi