Merge pull request swiftlang#77413 from etcwilde/ewilde/6.0-use-toolchain-clang-on-macos

[🍒 Swift 6.0.x] Use toolchain clang on macOS

Author: etcwilde

utils/build-script-impl

@@ -1670,8 +1670,11 @@ for host in "${ALL_HOSTS[@]}"; do
     else
         CLANG_BIN="$(build_directory_bin ${LOCAL_HOST} llvm)"
     fi
-    export SWIFT_DRIVER_CLANG_EXEC="${CLANG_BIN}/clang"
-    export SWIFT_DRIVER_CLANGXX_EXEC="${CLANG_BIN}/clang++"
+
+    if [[ -f "${CLANG_BIN}/clang" ]] && [[ -z ${ENABLE_ASAN+x} ]]; then
+      export SWIFT_DRIVER_CLANG_EXEC="${CLANG_BIN}/clang"
+      export SWIFT_DRIVER_CLANGXX_EXEC="${CLANG_BIN}/clang++"
+    fi
 
     if [[ "${NATIVE_SWIFT_TOOLS_PATH}" ]] ; then
         SWIFTC_BIN="${NATIVE_SWIFT_TOOLS_PATH}/swiftc"
@@ -2782,8 +2785,11 @@ for host in "${ALL_HOSTS[@]}"; do
     else
         CLANG_BIN="$(build_directory_bin ${LOCAL_HOST} llvm)"
     fi
-    export SWIFT_DRIVER_CLANG_EXEC="${CLANG_BIN}/clang"
-    export SWIFT_DRIVER_CLANGXX_EXEC="${CLANG_BIN}/clang++"
+
+    if [[ -f "${CLANG_BIN}/clang" ]] && [[ -z ${ENABLE_ASAN+x} ]]; then
+      export SWIFT_DRIVER_CLANG_EXEC="${CLANG_BIN}/clang"
+      export SWIFT_DRIVER_CLANGXX_EXEC="${CLANG_BIN}/clang++"
+    fi
 
     if [[ "${NATIVE_SWIFT_TOOLS_PATH}" ]] ; then
         SWIFTC_BIN="${NATIVE_SWIFT_TOOLS_PATH}/swiftc"
@@ -3074,8 +3080,11 @@ for host in "${ALL_HOSTS[@]}"; do
     else
         CLANG_BIN="$(build_directory_bin ${LOCAL_HOST} llvm)"
     fi
-    export SWIFT_DRIVER_CLANG_EXEC="${CLANG_BIN}/clang"
-    export SWIFT_DRIVER_CLANGXX_EXEC="${CLANG_BIN}/clang++"
+
+    if [[ -f "${CLANG_BIN}/clang" ]] && [[ -z ${ENABLE_ASAN+x} ]]; then
+      export SWIFT_DRIVER_CLANG_EXEC="${CLANG_BIN}/clang"
+      export SWIFT_DRIVER_CLANGXX_EXEC="${CLANG_BIN}/clang++"
+    fi
 
     # Set the build options for this host
     set_build_options_for_host $host