[PATCH] D31638: [CMake][libcxx] Use check_c_compiler_flag to check for nodefaultlibs

[Petr Hosek via Phabricator via llvm-commits]

phosek created this revision.
Herald added a subscriber: mgorny.

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.


Repository:
  rL LLVM

https://reviews.llvm.org/D31638

Files:
  cmake/config-ix.cmake


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


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