70 lines
3.0 KiB
CMake
70 lines
3.0 KiB
CMake
# MIT License
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# Copyright (c) 2017 Cristian Adam
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# Permission is hereby granted, free of charge, to any person obtaining a copy
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# of this software and associated documentation files (the "Software"), to deal
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# in the Software without restriction, including without limitation the rights
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# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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# copies of the Software, and to permit persons to whom the Software is
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# furnished to do so, subject to the following conditions:
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# The above copyright notice and this permission notice shall be included in all
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# copies or substantial portions of the Software.
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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# SOFTWARE.
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cmake_minimum_required(VERSION 3.4.3)
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set(cache_file ${CMAKE_CHECKS_CACHE_FILE})
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if(NOT cache_file)
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set(cache_file ${CMAKE_BINARY_DIR}/cmake_checks_cache.txt)
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endif()
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# Include the content of CheckCXXCompilerFlag just not to have the original
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# include(CheckCXXSourceCompiles) which has precedence, and which doesn't have
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# a include guard, thus overriding my overriden version
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include(${CMAKE_CURRENT_LIST_DIR}/CheckCXXSourceCompiles.cmake)
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include(CMakeCheckCompilerFlagCommonPatterns)
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# Distributed under the OSI-approved BSD 3-Clause License. See accompanying
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# file Copyright.txt or https://cmake.org/licensing for details.
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macro (CHECK_CXX_COMPILER_FLAG_original _FLAG _RESULT)
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set(SAFE_CMAKE_REQUIRED_DEFINITIONS "${CMAKE_REQUIRED_DEFINITIONS}")
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set(CMAKE_REQUIRED_DEFINITIONS "${_FLAG}")
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# Normalize locale during test compilation.
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set(_CheckCXXCompilerFlag_LOCALE_VARS LC_ALL LC_MESSAGES LANG)
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foreach(v ${_CheckCXXCompilerFlag_LOCALE_VARS})
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set(_CheckCXXCompilerFlag_SAVED_${v} "$ENV{${v}}")
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set(ENV{${v}} C)
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endforeach()
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CHECK_COMPILER_FLAG_COMMON_PATTERNS(_CheckCXXCompilerFlag_COMMON_PATTERNS)
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_check_cxx_source_compiles("int main() { return 0; }" ${_RESULT}
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# Some compilers do not fail with a bad flag
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FAIL_REGEX "command line option .* is valid for .* but not for C\\\\+\\\\+" # GNU
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${_CheckCXXCompilerFlag_COMMON_PATTERNS}
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)
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foreach(v ${_CheckCXXCompilerFlag_LOCALE_VARS})
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set(ENV{${v}} ${_CheckCXXCompilerFlag_SAVED_${v}})
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unset(_CheckCXXCompilerFlag_SAVED_${v})
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endforeach()
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unset(_CheckCXXCompilerFlag_LOCALE_VARS)
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unset(_CheckCXXCompilerFlag_COMMON_PATTERNS)
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set (CMAKE_REQUIRED_DEFINITIONS "${SAFE_CMAKE_REQUIRED_DEFINITIONS}")
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endmacro ()
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macro(check_cxx_compiler_flag flag variable)
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CHECK_CXX_COMPILER_FLAG_original("${flag}" ${variable})
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file(APPEND ${cache_file} "set(${variable} \"${${variable}}\" CACHE INTERNAL \"Test ${flag}\")\n")
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endmacro()
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