| # Distributed under the OSI-approved BSD 3-Clause License. See accompanying |
| # file Copyright.txt or https://cmake.org/licensing for details. |
| |
| include_guard(GLOBAL) |
| include(Internal/CheckFlagCommonConfig) |
| include(Internal/CheckSourceCompiles) |
| include(CMakeCheckCompilerFlagCommonPatterns) |
| |
| cmake_policy(PUSH) |
| cmake_policy(SET CMP0054 NEW) # if() quoted variables not dereferenced |
| |
| function(CMAKE_CHECK_LINKER_FLAG _lang _flag _var) |
| # link step supports less languages than the compiler |
| # so do a first check about the requested language |
| if (_lang STREQUAL "ISPC") |
| message (SEND_ERROR "check_linker_flag: ${_lang}: unsupported language.") |
| return() |
| endif() |
| |
| # Parse extra arguments |
| cmake_parse_arguments(PARSE_ARGV 3 CHECK_LINKER_FLAG "" "OUTPUT_VARIABLE" "") |
| |
| cmake_check_flag_common_init("check_linker_flag" ${_lang} _lang_src _lang_fail_regex) |
| |
| set(CMAKE_REQUIRED_LINK_OPTIONS "${_flag}") |
| |
| check_compiler_flag_common_patterns(_common_patterns) |
| cmake_check_source_compiles(${_lang} |
| "${_lang_src}" |
| ${_var} |
| ${_lang_fail_regex} |
| ${_common_patterns} |
| OUTPUT_VARIABLE _output |
| ) |
| |
| if (CHECK_LINKER_FLAG_OUTPUT_VARIABLE) |
| set(${CHECK_LINKER_FLAG_OUTPUT_VARIABLE} "${_output}" PARENT_SCOPE) |
| endif() |
| |
| cmake_check_flag_common_finish() |
| endfunction() |
| |
| cmake_policy(POP) |
