Don't use -fvisibility-inlines-hidden on mingw to try to avoid a lot of

[oota-llvm.git] / cmake / modules / HandleLLVMOptions.cmake

diff --git a/cmake/modules/HandleLLVMOptions.cmake b/cmake/modules/HandleLLVMOptions.cmake
index 33d7d9abadd0da98e9cc39e26750d5b09b9ff0fa..229127d83203a24e0f6b6a946bc1ae844381f526 100644 (file)
--- a/cmake/modules/HandleLLVMOptions.cmake
+++ b/cmake/modules/HandleLLVMOptions.cmake
@@ -89,11 +89,15 @@ if( LLVM_ENABLE_PIC )
       message(WARNING "-fPIC not supported.")
     endif()
 
-    check_cxx_compiler_flag("-fvisibility-inlines-hidden" SUPPORTS_FVISIBILITY_INLINES_HIDDEN_FLAG)
-    if( SUPPORTS_FVISIBILITY_INLINES_HIDDEN_FLAG )
-      set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fvisibility-inlines-hidden")
-      set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fvisibility-inlines-hidden")
-    endif()
+    if( WIN32 OR CYGWIN)
+      # MinGW warns if -fvisibility-inlines-hidden is used.
+    else()
+      check_cxx_compiler_flag("-fvisibility-inlines-hidden" SUPPORTS_FVISIBILITY_INLINES_HIDDEN_FLAG)
+      if( SUPPORTS_FVISIBILITY_INLINES_HIDDEN_FLAG )
+        set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fvisibility-inlines-hidden")
+        set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fvisibility-inlines-hidden")
+      endif()
+     endif()
   endif()
 endif()