[PATCH] D13692: Silence warning for unrecognised "-std=c99" warning on MSVC

[angelsl via llvm-commits]

angelsl updated this revision to Diff 37960.
angelsl added a comment.

Append the flag outside the loop (otherwise we get it twice, thrice, etc)


http://reviews.llvm.org/D13692

Files:
  cmake/config-ix.cmake
  lib/builtins/CMakeLists.txt

Index: lib/builtins/CMakeLists.txt
===================================================================
--- lib/builtins/CMakeLists.txt
+++ lib/builtins/CMakeLists.txt
@@ -348,6 +348,8 @@
   add_subdirectory(macho_embedded)
   darwin_add_builtin_libraries(${BUILTIN_SUPPORTED_OS})
 elseif (NOT WIN32 OR MINGW)
+  append_string_if(COMPILER_RT_HAS_STD_C99_FLAG -std=c99 maybe_stdc99)
+
   foreach (arch ${BUILTIN_SUPPORTED_ARCH})
     if (CAN_TARGET_${arch})
       # Filter out generic versions of routines that are re-implemented in
@@ -365,7 +367,7 @@
                               STATIC
                               ARCHS ${arch}
                               SOURCES ${${arch}_SOURCES}
-                              CFLAGS "-std=c99"
+                              CFLAGS ${maybe_stdc99}
                               PARENT_TARGET builtins)
     endif ()
   endforeach ()
Index: cmake/config-ix.cmake
===================================================================
--- cmake/config-ix.cmake
+++ cmake/config-ix.cmake
@@ -29,6 +29,9 @@
 check_cxx_compiler_flag(-fno-lto             COMPILER_RT_HAS_FNO_LTO_FLAG)
 check_cxx_compiler_flag(-msse3               COMPILER_RT_HAS_MSSE3_FLAG)
 
+# Language options
+check_c_compiler_flag(-std=c99 COMPILER_RT_HAS_STD_C99_FLAG)
+
 check_cxx_compiler_flag(/GR COMPILER_RT_HAS_GR_FLAG)
 check_cxx_compiler_flag(/GS COMPILER_RT_HAS_GS_FLAG)
 check_cxx_compiler_flag(/MT COMPILER_RT_HAS_MT_FLAG)


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