Only set CMAKE_C_COMPILER if its not defined already

iCharlesHu · iCharlesHu · commit 5484b2956197 · 2024-05-29T14:25:27.000-07:00
diff --git a/CMakeLists.txt b/CMakeLists.txt
@@ -24,7 +24,9 @@ if(POLICY CMP0157)
     cmake_policy(SET CMP0157 NEW)
 endif()
 
-set(CMAKE_C_COMPILER clang)
+if (NOT DEFINED CMAKE_C_COMPILER)
+    set(CMAKE_C_COMPILER clang)
+endif()
 
 project(Foundation
     LANGUAGES C Swift)
