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[fix] error: module file CMakeFiles/__cmake_cxx23.dir/std.pcm cannot be loaded due to a configuration mismatch with the current compilation #4279 #4582
This commit is contained in:
guoliang
parent
9b479a455e
commit
82ce893a55
@ -5,6 +5,15 @@ if (${CMAKE_VERSION} VERSION_LESS 3.12)
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cmake_policy(VERSION ${CMAKE_MAJOR_VERSION}.${CMAKE_MINOR_VERSION})
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endif ()
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set(CMAKE_CXX_EXTENSIONS OFF)
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set(CMAKE_CXX_STANDARD 23)
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set(CMAKE_CXX_STANDARD_REQUIRED ON)
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if (CMAKE_CXX_COMPILER_ID MATCHES "Clang")
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add_compile_options(-stdlib=libc++)
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add_link_options(-stdlib=libc++)
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endif()
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# Determine if fmt is built as a subproject (using add_subdirectory)
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# or if it is the master project.
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if (NOT DEFINED FMT_MASTER_PROJECT)
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@ -44,21 +53,9 @@ endfunction()
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set(FMT_USE_CMAKE_MODULES FALSE)
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if (CMAKE_VERSION VERSION_GREATER_EQUAL 3.28 AND
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CMAKE_GENERATOR STREQUAL "Ninja")
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# Tentatively enable CMake FILE_SET module support; the final decision
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# (considering the compiler id) will be made after the project() call
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# when CMAKE_CXX_COMPILER_ID is known.
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set(FMT_USE_CMAKE_MODULES TRUE)
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endif ()
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# If the project is configured to build the module variant (FMT_MODULE=ON)
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# then disable CMake's automatic module scanning early to prevent CMake from
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# stopping the generation when the compiler can't discover import graphs
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# (common with some compiler+generator combinations such as GCC + Ninja).
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# A user can still override CMAKE_CXX_SCAN_FOR_MODULES explicitly if needed.
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if (DEFINED FMT_MODULE AND FMT_MODULE)
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set(CMAKE_CXX_SCAN_FOR_MODULES OFF CACHE BOOL "Disable CMake module scanning when using manual module precompilation" FORCE)
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endif()
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# Adds a library compiled with C++20 module support.
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# `enabled` is a CMake variables that specifies if modules are enabled.
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# If modules are disabled `add_module_library` falls back to creating a
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@ -90,24 +87,9 @@ function(add_module_library name)
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target_sources(${name} PUBLIC FILE_SET fmt TYPE CXX_MODULES
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FILES ${sources})
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else()
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# Disable CMake's automatic module scanning for this target. We perform
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# manual precompilation of module units and propagate module files via
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# -fmodule-file, so CMake's scanner is not needed and on some compilers
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# it is unavailable which causes generation errors.
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set_target_properties(${name} PROPERTIES CXX_SCAN_FOR_MODULES OFF)
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# `std` is affected by CMake options and may be higher than C++20.
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get_target_property(std ${name} CXX_STANDARD)
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# Respect CMAKE_CXX_EXTENSIONS when forming the -std flag used to
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# precompile modules. A mismatch between -std=gnu++<ver> and -std=c++<ver>
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# can cause "configuration mismatch" errors when loading .pcm files.
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if (CMAKE_CXX_EXTENSIONS)
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set(std_flag "-std=gnu++${std}")
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else()
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set(std_flag "-std=c++${std}")
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endif()
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if (CMAKE_CXX_COMPILER_ID MATCHES "Clang")
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set(pcms)
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foreach (src ${sources})
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@ -124,9 +106,9 @@ function(add_module_library name)
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add_custom_command(
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OUTPUT ${pcm}
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COMMAND ${CMAKE_CXX_COMPILER}
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${std_flag} -x c++-module --precompile -c
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-o ${pcm} ${CMAKE_CURRENT_SOURCE_DIR}/${src}
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"-I$<JOIN:$<TARGET_PROPERTY:${name},INCLUDE_DIRECTORIES>,;-I>"
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-std=c++${std} -x c++-module --precompile -c
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-o ${pcm} ${CMAKE_CURRENT_SOURCE_DIR}/${src}
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"-I$<JOIN:$<TARGET_PROPERTY:${name},INCLUDE_DIRECTORIES>,;-I>"
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# Required by the -I generator expression above.
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COMMAND_EXPAND_LISTS
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DEPENDS ${src})
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@ -141,9 +123,8 @@ function(add_module_library name)
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set(sources ${sources} ${pcm} ${CMAKE_CURRENT_BINARY_DIR}/${obj})
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add_custom_command(
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OUTPUT ${obj}
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COMMAND ${CMAKE_CXX_COMPILER} ${std_flag} -c -o ${obj} ${pcm}
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"-I$<JOIN:$<TARGET_PROPERTY:${name},INCLUDE_DIRECTORIES>,;-I>"
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COMMAND_EXPAND_LISTS
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COMMAND ${CMAKE_CXX_COMPILER} $<TARGET_PROPERTY:${name},COMPILE_OPTIONS>
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-c -o ${obj} ${pcm}
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DEPENDS ${pcm})
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endforeach ()
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endif ()
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@ -204,17 +185,6 @@ if (FMT_TEST AND FMT_MODULE)
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# The tests require {fmt} to be compiled as traditional library
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message(STATUS "Testing is incompatible with build mode 'module'.")
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endif ()
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# GCC's module support via -fmodules-ts is experimental and known to be
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# unstable in some versions; if the user requested module build but we are
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# using GCC, prefer to disable FMT_MODULE to avoid compiler internal errors.
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if (CMAKE_CXX_COMPILER_ID MATCHES "GNU" AND FMT_MODULE)
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# GCC module support is unstable in some environments. Prefer a non-fatal
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# status message so developers are informed but not alarmed; the behavior
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# still disables module mode to avoid compiler crashes.
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message(STATUS "Disabling FMT_MODULE because GCC's module support is unstable in this environment.")
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set(FMT_MODULE OFF CACHE BOOL "Build a module instead of a traditional library." FORCE)
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endif()
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set(FMT_SYSTEM_HEADERS_ATTRIBUTE "")
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if (FMT_SYSTEM_HEADERS)
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set(FMT_SYSTEM_HEADERS_ATTRIBUTE SYSTEM)
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@ -248,13 +218,6 @@ list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/support/cmake")
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include(CheckCXXCompilerFlag)
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include(JoinPaths)
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# Disable CMake's automatic module scanning on GCC because CMake's import
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# graph discovery is not available for some GCC versions/combination and
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# causes generation to fail. We perform manual precompilation instead.
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if (CMAKE_CXX_COMPILER_ID MATCHES "GNU")
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set(CMAKE_CXX_SCAN_FOR_MODULES OFF CACHE BOOL "Disable CMake module scanning for GCC; we use manual precompilation" FORCE)
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endif()
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if (FMT_MASTER_PROJECT AND NOT DEFINED CMAKE_CXX_VISIBILITY_PRESET)
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set_verbose(CMAKE_CXX_VISIBILITY_PRESET hidden CACHE STRING
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"Preset for the export of private symbols")
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@ -262,19 +225,6 @@ if (FMT_MASTER_PROJECT AND NOT DEFINED CMAKE_CXX_VISIBILITY_PRESET)
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hidden default)
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endif ()
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# Decide whether to use CMake's FILE_SET-based module support. We only enable
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# it when the generator and CMake version support it and the compiler is not
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# GCC (GCC lacks import-graph discovery in many setups). This check must run
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# after project() so CMAKE_CXX_COMPILER_ID is available.
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if (CMAKE_VERSION VERSION_GREATER_EQUAL 3.28 AND
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CMAKE_GENERATOR STREQUAL "Ninja" AND
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NOT CMAKE_CXX_COMPILER_ID MATCHES "GNU")
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set(FMT_USE_CMAKE_MODULES TRUE)
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else()
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set(FMT_USE_CMAKE_MODULES FALSE)
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endif()
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message(STATUS "FMT_USE_CMAKE_MODULES = ${FMT_USE_CMAKE_MODULES}")
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if (FMT_MASTER_PROJECT AND NOT DEFINED CMAKE_VISIBILITY_INLINES_HIDDEN)
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set_verbose(CMAKE_VISIBILITY_INLINES_HIDDEN ON CACHE BOOL
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"Whether to add a compile flag to hide symbols of inline functions")
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@ -590,4 +540,4 @@ if (FMT_MASTER_PROJECT AND EXISTS ${gitignore})
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set(CPACK_PACKAGE_NAME fmt)
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set(CPACK_RESOURCE_FILE_README ${PROJECT_SOURCE_DIR}/README.md)
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include(CPack)
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endif ()
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endif ()
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