Add check before using a flag to ensure clang can compile

9885aac6 · BRAMAS Berenger · 09e9b58e · 9885aac6
Commit 9885aac6 authored Mar 03, 2015 by BRAMAS Berenger
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CMakeLists.txt CMakeLists.txt +5 -1

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--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -117,7 +117,11 @@ if (MORSE_DISTRIB_DIR OR EXISTS "${CMAKE_SOURCE_DIR}/CMakeModules/morse/")
  else()
    # NOT      INTEL
    if(NOT ScalFMM_USE_MPI)
-      set(ScalFMM_CXX_FLAGS  "${ScalFMM_CXX_FLAGS} -Wzero-as-null-pointer-constant")
+      include(CheckCCompilerFlag)
+      check_c_compiler_flag(-Wzero-as-null-pointer-constant HAS_WZERO_NULL_PTR_FLAG)
+      if(HAS_WZERO_NULL_PTR_FLAG)
+        set(ScalFMM_CXX_FLAGS  "${ScalFMM_CXX_FLAGS} -Wzero-as-null-pointer-constant")
+      endif()
    else()
      include(CheckCCompilerFlag)
      check_c_compiler_flag(-Wno-literal-suffix HAS_NO_LITERAL_SUFFIX_FLAG)