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if(__FIND_CXX11_CMAKE__)
return()
endif()
set(__FIND_CXX11_CMAKE__ TRUE)
include(CheckCXXCompilerFlag)
enable_language(CXX)
check_cxx_compiler_flag("-std=c++11" COMPILER_KNOWS_CXX11)
if(COMPILER_KNOWS_CXX11)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")
# Tested on Mac OS X 10.8.2 with XCode 4.6 Command Line Tools
# Clang requires this to find the correct c++11 headers
check_cxx_compiler_flag("-stdlib=libc++" COMPILER_KNOWS_STDLIB)
if(APPLE AND COMPILER_KNOWS_STDLIB)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -stdlib=libc++")
endif()
else()
check_cxx_compiler_flag("-std=c++0x" COMPILER_KNOWS_CXX0X)
if(COMPILER_KNOWS_CXX0X)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++0x")
else()
message(FATAL_ERROR "Your C++ compiler does not support C++11.")
endif()
endif()