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7644d557df
Commit 5abaf65154 (Check*: Restore toleration of `;-W...` in
CMAKE_REQUIRED_FLAGS, 2026-06-24, v4.4.0-rc3~2^2) introduced logic to
prevent `-W*` arguments in `CMAKE_REQUIRED_FLAGS` from being passed as
CMake arguments. It was never the intent of `CMAKE_REQUIRED_FLAGS` to
support such usage; however, since older versions of CMake would
silently accept such arguments, some users were unintentionally passing
compiler warnings as CMake arguments. Although this usage is incorrect,
it was silently tolerated until CMake 4.4, which began treating unknown
`-W*` as an error.
Because it turns out that modules besides `CheckSource{Compiles,Runs}`
are affected, we are going to need the logic added by that commit in
many more places. As a first step toward accommodating that need, move
the logic to a new internal helper. While we're at it, try to generally
consolidate the common logic for handling the various variables that the
`Check*` family of modules uses for injecting arguments into the
ultimate `try_compile` calls.
116 lines
3.4 KiB
CMake
116 lines
3.4 KiB
CMake
# Distributed under the OSI-approved BSD 3-Clause License. See accompanying
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# file LICENSE.rst or https://cmake.org/licensing for details.
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include_guard(GLOBAL)
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include(Internal/CheckCommon)
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function(CMAKE_CHECK_SOURCE_COMPILES _lang _source _var)
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if(NOT DEFINED "${_var}")
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set(_lang_filename "src")
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if(_lang STREQUAL "C")
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set(_lang_textual "C")
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set(_lang_ext "c")
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elseif(_lang STREQUAL "CXX")
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set(_lang_textual "C++")
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set(_lang_ext "cxx")
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elseif(_lang STREQUAL "CUDA")
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set(_lang_textual "CUDA")
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set(_lang_ext "cu")
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elseif(_lang STREQUAL "Fortran")
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set(_lang_textual "Fortran")
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set(_lang_ext "F90")
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elseif(_lang STREQUAL "HIP")
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set(_lang_textual "HIP")
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set(_lang_ext "hip")
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elseif(_lang STREQUAL "ISPC")
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set(_lang_textual "ISPC")
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set(_lang_ext "ispc")
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elseif(_lang STREQUAL "OBJC")
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set(_lang_textual "Objective-C")
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set(_lang_ext "m")
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elseif(_lang STREQUAL "OBJCXX")
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set(_lang_textual "Objective-C++")
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set(_lang_ext "mm")
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elseif(_lang STREQUAL "Swift")
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set(_lang_textual "Swift")
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set(_lang_ext "swift")
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if (NOT DEFINED CMAKE_TRY_COMPILE_TARGET_TYPE
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OR CMAKE_TRY_COMPILE_TARGET_TYPE STREQUAL "EXECUTABLE")
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set(_lang_filename "main")
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endif()
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else()
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message (SEND_ERROR "check_source_compiles: ${_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_source_compiles: ${_lang}: needs to be enabled before use.")
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return()
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endif()
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set(_FAIL_REGEX)
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set(_SRC_EXT)
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set(_key)
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foreach(arg ${ARGN})
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if("${arg}" MATCHES "^(FAIL_REGEX|SRC_EXT|OUTPUT_VARIABLE)$")
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set(_key "${arg}")
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elseif(_key STREQUAL "FAIL_REGEX")
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list(APPEND _FAIL_REGEX "${arg}")
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elseif(_key STREQUAL "SRC_EXT")
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set(_SRC_EXT "${arg}")
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set(_key "")
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elseif(_key STREQUAL "OUTPUT_VARIABLE")
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set(_OUTPUT_VARIABLE "${arg}")
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set(_key "")
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else()
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message(FATAL_ERROR "Unknown argument:\n ${arg}\n")
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endif()
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endforeach()
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if(NOT _SRC_EXT)
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set(_SRC_EXT ${_lang_ext})
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endif()
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cmake_check_common_init_args(_CSC)
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if(NOT CMAKE_REQUIRED_QUIET)
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message(CHECK_START "Performing Test ${_var}")
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endif()
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string(APPEND _source "\n")
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try_compile(${_var}
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SOURCE_FROM_VAR "${_lang_filename}.${_SRC_EXT}" _source
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COMPILE_DEFINITIONS -D${_var} ${CMAKE_REQUIRED_DEFINITIONS}
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${_CSC_ADD_LINK_OPTIONS}
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${_CSC_ADD_LINK_LIBRARIES}
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CMAKE_FLAGS
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-DCOMPILE_DEFINITIONS:STRING=${CMAKE_REQUIRED_FLAGS}
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${_CSC_EXTRA_CMAKE_ARGUMENTS}
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"${_CSC_INCLUDE_DIRECTORIES}"
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"${_CSC_LINK_DIRECTORIES}"
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OUTPUT_VARIABLE OUTPUT)
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foreach(_regex ${_FAIL_REGEX})
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if("${OUTPUT}" MATCHES "${_regex}")
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set(${_var} 0)
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endif()
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endforeach()
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if (_OUTPUT_VARIABLE)
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set(${_OUTPUT_VARIABLE} "${OUTPUT}" PARENT_SCOPE)
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endif()
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if(${_var})
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set(${_var} 1 CACHE INTERNAL "Test ${_var}")
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if(NOT CMAKE_REQUIRED_QUIET)
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message(CHECK_PASS "Success")
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endif()
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else()
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if(NOT CMAKE_REQUIRED_QUIET)
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message(CHECK_FAIL "Failed")
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endif()
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set(${_var} "" CACHE INTERNAL "Test ${_var}")
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endif()
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endif()
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endfunction()
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