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d192918586
The conversion of Check<Lang>CompilerFlag, SourceCompiles, and SourceRuns over to the new functions has the possibility of breaking projects that had functions with those existing names. To reduce the possibility of collisions we now have all the legacy code call functions that start with `cmake_`, and users will need to explicitly include the new modules to get the non-prefixed versions Fixes: #21359
80 lines
3.0 KiB
CMake
80 lines
3.0 KiB
CMake
# 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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include_guard(GLOBAL)
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include(Internal/CheckSourceCompiles)
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include(CMakeCheckCompilerFlagCommonPatterns)
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cmake_policy(PUSH)
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cmake_policy(SET CMP0054 NEW) # if() quoted variables not dereferenced
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cmake_policy(SET CMP0057 NEW) # if() supports IN_LIST
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function(CMAKE_CHECK_COMPILER_FLAG _lang _flag _var)
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if(_lang STREQUAL C)
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set(_lang_src "int main(void) { return 0; }")
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set(_lang_fail_regex FAIL_REGEX "command[ -]line option .* is valid for .* but not for C")
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elseif(_lang STREQUAL CXX)
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set(_lang_src "int main() { return 0; }")
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set(_lang_fail_regex FAIL_REGEX "command[ -]line option .* is valid for .* but not for C\\+\\+")
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elseif(_lang STREQUAL CUDA)
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set(_lang_src "__host__ int main() { return 0; }")
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set(_lang_fail_regex FAIL_REGEX "command[ -]line option .* is valid for .* but not for C\\+\\+" # Host GNU
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FAIL_REGEX "argument unused during compilation: .*") # Clang
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elseif(_lang STREQUAL Fortran)
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set(_lang_src " program test\n stop\n end program")
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set(_lang_fail_regex FAIL_REGEX "command[ -]line option .* is valid for .* but not for Fortran")
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elseif(_lang STREQUAL OBJC)
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set(_lang_src [=[
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#ifndef __OBJC__
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# error "Not an Objective-C compiler"
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#endif
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int main(void) { return 0; }]=])
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set(_lang_fail_regex FAIL_REGEX "command[ -]line option .* is valid for .* but not for Objective-C" # GNU
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FAIL_REGEX "argument unused during compilation: .*") # Clang
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elseif(_lang STREQUAL OBJCXX)
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set(_lang_src [=[
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#ifndef __OBJC__
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# error "Not an Objective-C++ compiler"
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#endif
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int main(void) { return 0; }]=])
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set(_lang_fail_regex FAIL_REGEX "command[ -]line option .* is valid for .* but not for Objective-C\\+\\+" # GNU
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FAIL_REGEX "argument unused during compilation: .*") # Clang
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elseif(_lang STREQUAL ISPC)
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set(_lang_src "float func(uniform int32, float a) { return a / 2.25; }")
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else()
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message (SEND_ERROR "check_compiler_flag: ${_lang}: unknown language.")
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return()
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endif()
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get_property (_supported_languages GLOBAL PROPERTY ENABLED_LANGUAGES)
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if (NOT _lang IN_LIST _supported_languages)
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message (SEND_ERROR "check_compiler_flag: ${_lang}: needs to be enabled before use.")
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return()
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endif()
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set(CMAKE_REQUIRED_DEFINITIONS ${_flag})
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# Normalize locale during test compilation.
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set(_locale_vars LC_ALL LC_MESSAGES LANG)
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foreach(v IN LISTS _locale_vars)
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set(_locale_vars_saved_${v} "$ENV{${v}}")
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set(ENV{${v}} C)
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endforeach()
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check_compiler_flag_common_patterns(_common_patterns)
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cmake_check_source_compiles(${_lang}
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"${_lang_src}"
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${_var}
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${_lang_fail_regex}
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${_common_patterns}
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)
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foreach(v IN LISTS _locale_vars)
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set(ENV{${v}} ${_locale_vars_saved_${v}})
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endforeach()
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set(${_var} "${${_var}}" PARENT_SCOPE)
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endfunction ()
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cmake_policy(POP)
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