| # Distributed under the OSI-approved BSD 3-Clause License. See accompanying |
| # file Copyright.txt or https://cmake.org/licensing for details. |
| |
| include_guard(GLOBAL) |
| |
| cmake_policy(PUSH) |
| cmake_policy(SET CMP0054 NEW) # if() quoted variables not dereferenced |
| cmake_policy(SET CMP0057 NEW) # if() supports IN_LIST |
| |
| function(CMAKE_CHECK_SOURCE_COMPILES _lang _source _var) |
| if(NOT DEFINED "${_var}") |
| |
| if(_lang STREQUAL "C") |
| set(_lang_textual "C") |
| set(_lang_ext "c") |
| elseif(_lang STREQUAL "CXX") |
| set(_lang_textual "C++") |
| set(_lang_ext "cxx") |
| elseif(_lang STREQUAL "CUDA") |
| set(_lang_textual "CUDA") |
| set(_lang_ext "cu") |
| elseif(_lang STREQUAL "Fortran") |
| set(_lang_textual "Fortran") |
| set(_lang_ext "F90") |
| elseif(_lang STREQUAL "HIP") |
| set(_lang_textual "HIP") |
| set(_lang_ext "hip") |
| elseif(_lang STREQUAL "ISPC") |
| set(_lang_textual "ISPC") |
| set(_lang_ext "ispc") |
| elseif(_lang STREQUAL "OBJC") |
| set(_lang_textual "Objective-C") |
| set(_lang_ext "m") |
| elseif(_lang STREQUAL "OBJCXX") |
| set(_lang_textual "Objective-C++") |
| set(_lang_ext "mm") |
| else() |
| message (SEND_ERROR "check_source_compiles: ${_lang}: unknown language.") |
| return() |
| endif() |
| |
| get_property (_supported_languages GLOBAL PROPERTY ENABLED_LANGUAGES) |
| if (NOT _lang IN_LIST _supported_languages) |
| message (SEND_ERROR "check_source_compiles: ${_lang}: needs to be enabled before use.") |
| return() |
| endif() |
| |
| set(_FAIL_REGEX) |
| set(_SRC_EXT) |
| set(_key) |
| foreach(arg ${ARGN}) |
| if("${arg}" MATCHES "^(FAIL_REGEX|SRC_EXT)$") |
| set(_key "${arg}") |
| elseif(_key STREQUAL "FAIL_REGEX") |
| list(APPEND _FAIL_REGEX "${arg}") |
| elseif(_key STREQUAL "SRC_EXT") |
| set(_SRC_EXT "${arg}") |
| set(_key "") |
| else() |
| message(FATAL_ERROR "Unknown argument:\n ${arg}\n") |
| endif() |
| endforeach() |
| |
| if(NOT _SRC_EXT) |
| set(_SRC_EXT ${_lang_ext}) |
| endif() |
| |
| if(CMAKE_REQUIRED_LINK_OPTIONS) |
| set(CHECK_${LANG}_SOURCE_COMPILES_ADD_LINK_OPTIONS |
| LINK_OPTIONS ${CMAKE_REQUIRED_LINK_OPTIONS}) |
| else() |
| set(CHECK_${LANG}_SOURCE_COMPILES_ADD_LINK_OPTIONS) |
| endif() |
| if(CMAKE_REQUIRED_LIBRARIES) |
| set(CHECK_${LANG}_SOURCE_COMPILES_ADD_LIBRARIES |
| LINK_LIBRARIES ${CMAKE_REQUIRED_LIBRARIES}) |
| else() |
| set(CHECK_${LANG}_SOURCE_COMPILES_ADD_LIBRARIES) |
| endif() |
| if(CMAKE_REQUIRED_INCLUDES) |
| set(CHECK_${LANG}_SOURCE_COMPILES_ADD_INCLUDES |
| "-DINCLUDE_DIRECTORIES:STRING=${CMAKE_REQUIRED_INCLUDES}") |
| else() |
| set(CHECK_${LANG}_SOURCE_COMPILES_ADD_INCLUDES) |
| endif() |
| file(WRITE "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/src.${_SRC_EXT}" |
| "${_source}\n") |
| |
| if(NOT CMAKE_REQUIRED_QUIET) |
| message(CHECK_START "Performing Test ${_var}") |
| endif() |
| try_compile(${_var} |
| ${CMAKE_BINARY_DIR} |
| ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/src.${_SRC_EXT} |
| COMPILE_DEFINITIONS -D${_var} ${CMAKE_REQUIRED_DEFINITIONS} |
| ${CHECK_${LANG}_SOURCE_COMPILES_ADD_LINK_OPTIONS} |
| ${CHECK_${LANG}_SOURCE_COMPILES_ADD_LIBRARIES} |
| CMAKE_FLAGS -DCOMPILE_DEFINITIONS:STRING=${CMAKE_REQUIRED_FLAGS} |
| "${CHECK_${LANG}_SOURCE_COMPILES_ADD_INCLUDES}" |
| OUTPUT_VARIABLE OUTPUT) |
| |
| foreach(_regex ${_FAIL_REGEX}) |
| if("${OUTPUT}" MATCHES "${_regex}") |
| set(${_var} 0) |
| endif() |
| endforeach() |
| |
| if(${_var}) |
| set(${_var} 1 CACHE INTERNAL "Test ${_var}") |
| if(NOT CMAKE_REQUIRED_QUIET) |
| message(CHECK_PASS "Success") |
| endif() |
| file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log |
| "Performing ${_lang_textual} SOURCE FILE Test ${_var} succeeded with the following output:\n" |
| "${OUTPUT}\n" |
| "Source file was:\n${_source}\n") |
| else() |
| if(NOT CMAKE_REQUIRED_QUIET) |
| message(CHECK_FAIL "Failed") |
| endif() |
| set(${_var} "" CACHE INTERNAL "Test ${_var}") |
| file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log |
| "Performing ${_lang_textual} SOURCE FILE Test ${_var} failed with the following output:\n" |
| "${OUTPUT}\n" |
| "Source file was:\n${_source}\n") |
| endif() |
| endif() |
| endfunction() |
| |
| cmake_policy(POP) |