[CMake] Use -std=c++11 if supported

Summary: This patch adds a check for if -std=c++11 is a supported flag, and adds it to CMAKE_CXX_FLAGS if it is supported.

Reviewers: EricWF

Subscribers: cfe-commits

Differential Revision: https://reviews.llvm.org/D24007

llvm-svn: 280021

diff --git a/libcxxabi/cmake/config-ix.cmake b/libcxxabi/cmake/config-ix.cmake
index baed2db8e412cfdb40637cf85f2e2215e15ce8a0..09dcac96e3d73305a8fecabb5c8d11da728bd9d9 100644 (file)
--- a/libcxxabi/cmake/config-ix.cmake
+++ b/libcxxabi/cmake/config-ix.cmake
@@ -37,6 +37,11 @@ check_cxx_compiler_flag(/EHsc                 LIBCXXABI_HAS_EHSC_FLAG)
 check_cxx_compiler_flag(/EHs-                 LIBCXXABI_HAS_NO_EHS_FLAG)
 check_cxx_compiler_flag(/EHa-                 LIBCXXABI_HAS_NO_EHA_FLAG)
 check_cxx_compiler_flag(/GR-                  LIBCXXABI_HAS_NO_GR_FLAG)
+check_cxx_compiler_flag(-std=c++11            LIBCXXABI_HAS_STD_CXX11)
+
+if(LIBCXXABI_HAS_STD_CXX11)
+  list(APPEND CMAKE_CXX_FLAGS -std=c++11)
+endif()
 
 # Check libraries
 check_library_exists(c fopen "" LIBCXXABI_HAS_C_LIB)