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87 lines
2.9 KiB
87 lines
2.9 KiB
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# Copyright (C) 2013-2018 Daniel Scharrer |
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# |
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# This software is provided 'as-is', without any express or implied |
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# warranty. In no event will the author(s) be held liable for any damages |
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# arising from the use of this software. |
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# |
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# Permission is granted to anyone to use this software for any purpose, |
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# including commercial applications, and to alter it and redistribute it |
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# freely, subject to the following restrictions: |
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# |
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# 1. The origin of this software must not be misrepresented; you must not |
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# claim that you wrote the original software. If you use this software |
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# in a product, an acknowledgment in the product documentation would be |
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# appreciated but is not required. |
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# 2. Altered source versions must be plainly marked as such, and must not be |
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# misrepresented as being the original software. |
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# 3. This notice may not be removed or altered from any source distribution. |
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include(CheckCXXSourceCompiles) |
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include(CompileCheck) |
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set(_HAS_CXX11 0) |
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set(CXX11_CHECK_DIR "${CMAKE_CURRENT_LIST_DIR}/check") |
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function(enable_cxx_version version) |
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if(MSVC) |
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if(NOT version LESS 2011 AND MSVC_VERSION LESS 1600) |
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if(NOT version LESS 2017 AND NOT MSVC_VERSION LESS 1911) |
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set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /std:c++17") |
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elseif(NOT version LESS 2014 AND NOT MSVC_VERSION LESS 1910) |
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set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /std:c++14") |
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elseif(NOT version LESS 2014 AND NOT MSVC_VERSION LESS 1900) |
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# Only introduced with update 3 of MSVC 2015 |
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add_cxxflag("/std:c++14") |
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endif() |
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set(_HAS_CXX11 1 PARENT_SCOPE) |
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endif() |
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else() |
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set(FLAG_FOUND 0) |
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if(NOT version LESS 2017) |
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add_cxxflag("-std=c++17") |
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endif() |
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if(NOT version LESS 2014 AND NOT FLAG_FOUND) |
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add_cxxflag("-std=c++14") |
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endif() |
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if(NOT version LESS 2011 AND NOT FLAG_FOUND) |
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add_cxxflag("-std=c++11") |
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endif() |
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if(NOT version LESS 2011 AND FLAG_FOUND OR NOT CMAKE_COMPILER_IS_GNUCXX) |
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if(SET_WARNING_FLAGS) |
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add_cxxflag("-pedantic") |
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endif() |
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set(_HAS_CXX11 1 PARENT_SCOPE) |
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endif() |
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endif() |
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set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}" PARENT_SCOPE) |
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endfunction(enable_cxx_version) |
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function(check_cxx11 CHECK RESULTVAR) |
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if(_HAS_CXX11) |
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if(MSVC AND ARGC GREATER 2) |
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if(MSVC_VERSION LESS ARGV2) |
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set(result) |
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else() |
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set(result 1) |
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endif() |
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else() |
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string(REGEX REPLACE "[^a-zA-Z0-9_][^a-zA-Z0-9_]*" "-" check "${CHECK}") |
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set(file "${CXX11_CHECK_DIR}/cxx11-${check}.cpp") |
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set(old_CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}") |
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set(old_CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS}") |
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strip_warning_flags(CMAKE_CXX_FLAGS) |
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strip_warning_flags(CMAKE_EXE_LINKER_FLAGS) |
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check_compile(result "${file}" "${CHECK}" "C++11 feature") |
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set(CMAKE_CXX_FLAGS "${old_CMAKE_CXX_FLAGS}") |
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set(CMAKE_EXE_LINKER_FLAGS "${old_CMAKE_EXE_LINKER_FLAGS}") |
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endif() |
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if(NOT DEFINED result OR result STREQUAL "") |
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set(${RESULTVAR} OFF PARENT_SCOPE) |
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else() |
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set(${RESULTVAR} ON PARENT_SCOPE) |
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endif() |
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else() |
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set(${RESULTVAR} OFF PARENT_SCOPE) |
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endif() |
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endfunction()
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