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[CMake][libcxx] Use check_c_compiler_flag to check for nodefaultlibs

We're using -nodefaultlibs to avoid the dependency on C++ library
when using check_cxx_compiler_flag, and as such we cannot use
check_cxx_compiler_flag to check the availability of -nodefaultlibs
itself.

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@299711 91177308-0d34-0410-b5e6-96231b3b80d8
Petr Hosek 8 years ago
parent
abdcc5c29c
commit
effdf248ec
1 changed files with 2 additions and 1 deletions
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  1. 2 1
      cmake/config-ix.cmake

+ 2 - 1
cmake/config-ix.cmake
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@@ -1,4 +1,5 @@
 
 include(CheckLibraryExists)
 
 include(CheckLibraryExists)
 
+include(CheckCCompilerFlag)
 
 include(CheckCXXCompilerFlag)
 
 include(CheckCXXCompilerFlag)
 
 
 
 if(WIN32 AND NOT MINGW)
 
 if(WIN32 AND NOT MINGW)
 
@@ -24,7 +25,7 @@ endif()
 
 # required during compilation (which has the -nodefaultlibs). libc is
 
 # required during compilation (which has the -nodefaultlibs). libc is
 
 # required for the link to go through. We remove sanitizers from the
 
 # required for the link to go through. We remove sanitizers from the
 
 # configuration checks to avoid spurious link errors.
 
 # configuration checks to avoid spurious link errors.
 
-check_cxx_compiler_flag(-nodefaultlibs LIBCXX_SUPPORTS_NODEFAULTLIBS_FLAG)
 
+check_c_compiler_flag(-nodefaultlibs LIBCXX_SUPPORTS_NODEFAULTLIBS_FLAG)
 
 if (LIBCXX_SUPPORTS_NODEFAULTLIBS_FLAG)
 
 if (LIBCXX_SUPPORTS_NODEFAULTLIBS_FLAG)
 
   set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} -nodefaultlibs")
 
   set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} -nodefaultlibs")
 
   if (LIBCXX_HAS_C_LIB)
 
   if (LIBCXX_HAS_C_LIB)