1d21dd0f7c
We run a `try_compile` with a tiny test source to check if the compiler works so that we can fail early if it does not. When the compiler does work, we immediately `try_compile` the ABI detection source. In the common case that both steps work, we gain no useful information from the first one and the work was wasted. Re-order the checks to try the ABI detection first. If it works then assume the compiler works and skip the dedicated check. If the ABI check fails then proceed with the normal test for a working compiler so the diagnostic can be shown as before. Fixes: #18703
92 lines
3.7 KiB
CMake
92 lines
3.7 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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if(CMAKE_CXX_COMPILER_FORCED)
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# The compiler configuration was forced by the user.
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# Assume the user has configured all compiler information.
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set(CMAKE_CXX_COMPILER_WORKS TRUE)
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return()
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endif()
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include(CMakeTestCompilerCommon)
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# work around enforced code signing and / or missing exectuable target type
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set(__CMAKE_SAVED_TRY_COMPILE_TARGET_TYPE ${CMAKE_TRY_COMPILE_TARGET_TYPE})
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if(_CMAKE_FEATURE_DETECTION_TARGET_TYPE)
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set(CMAKE_TRY_COMPILE_TARGET_TYPE ${_CMAKE_FEATURE_DETECTION_TARGET_TYPE})
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endif()
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# Remove any cached result from an older CMake version.
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# We now store this in CMakeCXXCompiler.cmake.
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unset(CMAKE_CXX_COMPILER_WORKS CACHE)
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# Try to identify the ABI and configure it into CMakeCXXCompiler.cmake
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include(${CMAKE_ROOT}/Modules/CMakeDetermineCompilerABI.cmake)
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CMAKE_DETERMINE_COMPILER_ABI(CXX ${CMAKE_ROOT}/Modules/CMakeCXXCompilerABI.cpp)
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if(CMAKE_CXX_ABI_COMPILED)
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# The compiler worked so skip dedicated test below.
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set(CMAKE_CXX_COMPILER_WORKS TRUE)
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message(STATUS "Check for working CXX compiler: ${CMAKE_CXX_COMPILER} - skipped")
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endif()
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# This file is used by EnableLanguage in cmGlobalGenerator to
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# determine that the selected C++ compiler can actually compile
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# and link the most basic of programs. If not, a fatal error
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# is set and cmake stops processing commands and will not generate
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# any makefiles or projects.
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if(NOT CMAKE_CXX_COMPILER_WORKS)
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PrintTestCompilerStatus("CXX")
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__TestCompiler_setTryCompileTargetType()
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file(WRITE ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/testCXXCompiler.cxx
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"#ifndef __cplusplus\n"
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"# error \"The CMAKE_CXX_COMPILER is set to a C compiler\"\n"
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"#endif\n"
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"int main(){return 0;}\n")
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try_compile(CMAKE_CXX_COMPILER_WORKS ${CMAKE_BINARY_DIR}
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${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/testCXXCompiler.cxx
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OUTPUT_VARIABLE __CMAKE_CXX_COMPILER_OUTPUT)
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# Move result from cache to normal variable.
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set(CMAKE_CXX_COMPILER_WORKS ${CMAKE_CXX_COMPILER_WORKS})
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unset(CMAKE_CXX_COMPILER_WORKS CACHE)
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__TestCompiler_restoreTryCompileTargetType()
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if(NOT CMAKE_CXX_COMPILER_WORKS)
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PrintTestCompilerResult(CHECK_FAIL "broken")
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file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log
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"Determining if the CXX compiler works failed with "
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"the following output:\n${__CMAKE_CXX_COMPILER_OUTPUT}\n\n")
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string(REPLACE "\n" "\n " _output "${__CMAKE_CXX_COMPILER_OUTPUT}")
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message(FATAL_ERROR "The C++ compiler\n \"${CMAKE_CXX_COMPILER}\"\n"
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"is not able to compile a simple test program.\nIt fails "
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"with the following output:\n ${_output}\n\n"
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"CMake will not be able to correctly generate this project.")
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endif()
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PrintTestCompilerResult(CHECK_PASS "works")
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file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log
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"Determining if the CXX compiler works passed with "
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"the following output:\n${__CMAKE_CXX_COMPILER_OUTPUT}\n\n")
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endif()
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# Try to identify the compiler features
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include(${CMAKE_ROOT}/Modules/CMakeDetermineCompileFeatures.cmake)
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CMAKE_DETERMINE_COMPILE_FEATURES(CXX)
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# Re-configure to save learned information.
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configure_file(
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${CMAKE_ROOT}/Modules/CMakeCXXCompiler.cmake.in
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${CMAKE_PLATFORM_INFO_DIR}/CMakeCXXCompiler.cmake
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@ONLY
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)
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include(${CMAKE_PLATFORM_INFO_DIR}/CMakeCXXCompiler.cmake)
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if(CMAKE_CXX_SIZEOF_DATA_PTR)
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foreach(f ${CMAKE_CXX_ABI_FILES})
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include(${f})
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endforeach()
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unset(CMAKE_CXX_ABI_FILES)
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endif()
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set(CMAKE_TRY_COMPILE_TARGET_TYPE ${__CMAKE_SAVED_TRY_COMPILE_TARGET_TYPE})
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unset(__CMAKE_SAVED_TRY_COMPILE_TARGET_TYPE)
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unset(__CMAKE_CXX_COMPILER_OUTPUT)
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