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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

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guoliang 2025-10-17 21:57:01 +08:00
parent 4a4876dd62
commit 452dd2b9f8
1 changed files with 24 additions and 14 deletions
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38
CMakeLists.txt
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@ -81,6 +81,15 @@ function(add_module_library name)
# `std` is affected by CMake options and may be higher than C++20. # `std` is affected by CMake options and may be higher than C++20.
get_target_property(std ${name} CXX_STANDARD) get_target_property(std ${name} CXX_STANDARD)
# Respect CMAKE_CXX_EXTENSIONS when forming the -std flag used to
# precompile modules. A mismatch between -std=gnu++<ver> and -std=c++<ver>
# can cause "configuration mismatch" errors when loading .pcm files.
if (CMAKE_CXX_EXTENSIONS)
set(std_flag "-std=gnu++${std}")
else()
set(std_flag "-std=c++${std}")
endif()
if (CMAKE_CXX_COMPILER_ID MATCHES "Clang") if (CMAKE_CXX_COMPILER_ID MATCHES "Clang")
set(pcms) set(pcms)
foreach (src ${sources}) foreach (src ${sources})
@ -94,15 +103,15 @@ function(add_module_library name)
# Use an absolute path to prevent target_link_libraries prepending -l # Use an absolute path to prevent target_link_libraries prepending -l
# to it. # to it.
set(pcms ${pcms} ${CMAKE_CURRENT_BINARY_DIR}/${pcm}) set(pcms ${pcms} ${CMAKE_CURRENT_BINARY_DIR}/${pcm})
add_custom_command( add_custom_command(
OUTPUT ${pcm} OUTPUT ${pcm}
COMMAND ${CMAKE_CXX_COMPILER} COMMAND ${CMAKE_CXX_COMPILER}
-std=c++${std} -x c++-module --precompile -c ${std_flag} -x c++-module --precompile -c
-o ${pcm} ${CMAKE_CURRENT_SOURCE_DIR}/${src} -o ${pcm} ${CMAKE_CURRENT_SOURCE_DIR}/${src}
"-I$<JOIN:$<TARGET_PROPERTY:${name},INCLUDE_DIRECTORIES>,;-I>" "-I$<JOIN:$<TARGET_PROPERTY:${name},INCLUDE_DIRECTORIES>,;-I>"
# Required by the -I generator expression above. # Required by the -I generator expression above.
COMMAND_EXPAND_LISTS COMMAND_EXPAND_LISTS
DEPENDS ${src}) DEPENDS ${src})
endforeach () endforeach ()
# Add .pcm files as sources to make sure they are built before the library. # Add .pcm files as sources to make sure they are built before the library.
@ -112,11 +121,12 @@ function(add_module_library name)
set(obj ${pcm_we}.o) set(obj ${pcm_we}.o)
# Use an absolute path to prevent target_link_libraries prepending -l. # Use an absolute path to prevent target_link_libraries prepending -l.
set(sources ${sources} ${pcm} ${CMAKE_CURRENT_BINARY_DIR}/${obj}) set(sources ${sources} ${pcm} ${CMAKE_CURRENT_BINARY_DIR}/${obj})
add_custom_command( add_custom_command(
OUTPUT ${obj} OUTPUT ${obj}
COMMAND ${CMAKE_CXX_COMPILER} $<TARGET_PROPERTY:${name},COMPILE_OPTIONS> COMMAND ${CMAKE_CXX_COMPILER} ${std_flag} -c -o ${obj} ${pcm}
-c -o ${obj} ${pcm} "-I$<JOIN:$<TARGET_PROPERTY:${name},INCLUDE_DIRECTORIES>,;-I>"
DEPENDS ${pcm}) COMMAND_EXPAND_LISTS
DEPENDS ${pcm})
endforeach () endforeach ()
endif () endif ()
target_sources(${name} PRIVATE ${sources}) target_sources(${name} PRIVATE ${sources})