69 lines
1.7 KiB
CMake
69 lines
1.7 KiB
CMake
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# - Finds if the compiler has C++11 support
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# This module can be used to detect compiler flags for using C++11, and checks
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# a small subset of the language.
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#
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# The following variables are set:
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# CXX11_FLAGS - flags to add to the CXX compiler for C++11 support
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# CXX11_FOUND - true if the compiler supports C++11
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#
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if(CXX11_FLAGS)
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set(CXX11_FOUND TRUE)
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return()
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endif()
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include(CheckCXXSourceCompiles)
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if(MSVC)
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set(CXX11_FLAG_CANDIDATES
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" "
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)
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else()
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set(CXX11_FLAG_CANDIDATES
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#gcc
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"-std=gnu++11"
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"-std=gnu++0x"
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#Gnu and Intel Linux
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"-std=c++11"
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"-std=c++0x"
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#Microsoft Visual Studio, and everything that automatically accepts C++11
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" "
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#Intel windows
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"/Qstd=c++11"
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"/Qstd=c++0x"
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)
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endif()
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set(CXX11_TEST_SOURCE
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"
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int main()
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{
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int n[] = {4,7,6,1,2};
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int r;
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auto f = [&](int j) { r = j; };
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for (auto i : n)
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f(i);
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return 0;
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}
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")
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foreach(FLAG ${CXX11_FLAG_CANDIDATES})
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set(SAFE_CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS}")
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set(CMAKE_REQUIRED_FLAGS "${FLAG}")
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unset(CXX11_FLAG_DETECTED CACHE)
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message(STATUS "Try C++11 flag = [${FLAG}]")
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check_cxx_source_compiles("${CXX11_TEST_SOURCE}" CXX11_FLAG_DETECTED)
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set(CMAKE_REQUIRED_FLAGS "${SAFE_CMAKE_REQUIRED_FLAGS}")
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if(CXX11_FLAG_DETECTED)
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set(CXX11_FLAGS_INTERNAL "${FLAG}")
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break()
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endif(CXX11_FLAG_DETECTED)
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endforeach(FLAG ${CXX11_FLAG_CANDIDATES})
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set(CXX11_FLAGS "${CXX11_FLAGS_INTERNAL}" CACHE STRING "C++11 Flags")
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include(FindPackageHandleStandardArgs)
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find_package_handle_standard_args(CXX11 DEFAULT_MSG CXX11_FLAGS)
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mark_as_advanced(CXX11_FLAGS)
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