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https://github.com/fmtlib/fmt.git
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Use add_module_library
This commit is contained in:
Victor Zverovich
parent
faf83406a9
commit
75f3b1c094
110
CMakeLists.txt
110
CMakeLists.txt
@ -24,6 +24,7 @@ function(join result_var)
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set(${result_var} "${result}" PARENT_SCOPE)
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endfunction()
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# DEPRECATED! Should be merged into add_module_library.
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function(enable_module target)
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if (MSVC)
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set(BMI ${CMAKE_CURRENT_BINARY_DIR}/${target}.ifc)
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@ -35,6 +36,79 @@ function(enable_module target)
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endif ()
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endfunction()
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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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# non-modular library.
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#
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# Usage:
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# add_module_library(<name> [sources...] FALLBACK [sources...] [IF enabled])
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function(add_module_library name)
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cmake_parse_arguments(AML "" "IF" "FALLBACK" ${ARGN})
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set(sources ${AML_UNPARSED_ARGUMENTS})
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add_library(${name})
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set_target_properties(${name} PROPERTIES LINKER_LANGUAGE CXX)
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if (NOT ${${AML_IF}})
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# Create a non-modular library.
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target_sources(${name} PRIVATE ${AML_FALLBACK})
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return()
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endif ()
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# Check if modules are supported.
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set(have_modules FALSE)
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if (CMAKE_CXX_COMPILER_ID MATCHES "Clang" AND
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CMAKE_CXX_COMPILER_VERSION VERSION_GREATER_EQUAL 16.0)
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set(have_modules TRUE)
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endif ()
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if (NOT have_modules)
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message(FATAL_ERROR "Modules not supported.")
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endif ()
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# Modules require C++20.
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target_compile_features(${name} PUBLIC cxx_std_20)
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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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set(pcms)
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foreach (src ${sources})
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get_filename_component(pcm ${src} NAME_WE)
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set(pcm ${pcm}.pcm)
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# Propagate -fmodule-file=*.pcm to targets that link with this library.
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target_compile_options(${name} PUBLIC -fmodule-file=${pcm})
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# Use an absolute path to prevent target_link_libraries prepending -l to it.
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set(pcms ${pcms} ${CMAKE_CURRENT_BINARY_DIR}/${pcm})
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add_custom_command(
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OUTPUT ${pcm}
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COMMAND ${CMAKE_CXX_COMPILER}
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-std=c++${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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endforeach ()
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# Add .pcm files as sources to make sure they are built before the library.
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set(files)
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foreach (pcm ${pcms})
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get_filename_component(pcm_we ${pcm} NAME_WE)
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set(obj ${pcm_we}.o)
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# Use an absolute path to prevent target_link_libraries prepending -l.
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set(files ${files} ${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} $<TARGET_PROPERTY:${name},COMPILE_OPTIONS>
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-c -o ${obj} ${pcm}
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DEPENDS ${pcm})
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endforeach ()
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target_sources(${name} PRIVATE ${files})
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endfunction()
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include(CMakeParseArguments)
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# Sets a cache variable with a docstring joined from multiple arguments:
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@ -214,16 +288,18 @@ endfunction()
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add_headers(FMT_HEADERS args.h chrono.h color.h compile.h core.h format.h
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format-inl.h os.h ostream.h printf.h ranges.h std.h
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xchar.h)
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if (FMT_MODULE)
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set(FMT_SOURCES src/fmt.cc)
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elseif (FMT_OS)
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set(FMT_SOURCES src/format.cc src/os.cc)
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else()
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set(FMT_SOURCES src/format.cc)
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set(FMT_SOURCES src/format.cc)
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if (FMT_OS)
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set(FMT_SOURCES ${FMT_SOURCES} src/os.cc)
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endif ()
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add_library(fmt ${FMT_SOURCES} ${FMT_HEADERS} README.rst ChangeLog.rst)
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add_module_library(fmt src/fmt.cc FALLBACK
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${FMT_SOURCES} ${FMT_HEADERS} README.rst ChangeLog.rst
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IF FMT_MODULE)
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add_library(fmt::fmt ALIAS fmt)
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if (FMT_MODULE)
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enable_module(fmt)
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endif ()
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if (FMT_WERROR)
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target_compile_options(fmt PRIVATE ${WERROR_FLAG})
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@ -232,25 +308,6 @@ if (FMT_PEDANTIC)
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target_compile_options(fmt PRIVATE ${PEDANTIC_COMPILE_FLAGS})
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endif ()
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if (FMT_MODULE)
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if (CMAKE_VERSION VERSION_LESS 3.26)
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message(FATAL_ERROR "Modules require CMake 3.26+.")
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endif ()
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set(CMAKE_EXPERIMENTAL_CXX_MODULE_CMAKE_API
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"2182bf5c-ef0d-489a-91da-49dbc3090d2a")
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set(CMAKE_EXPERIMENTAL_CXX_MODULE_DYNDEP 1)
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enable_module(fmt)
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target_sources(fmt PUBLIC
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FILE_SET cxx_modules TYPE CXX_MODULES FILES src/fmt.cc)
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# Workaround a CMake issue when using fmt as a subdirectory.
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target_compile_options(
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fmt PUBLIC
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-fprebuilt-module-path=${CMAKE_CURRENT_BINARY_DIR}/CMakeFiles/fmt.dir)
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# Workaround a bug in clang-scan-deps.
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target_include_directories(
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fmt PUBLIC /usr/lib/gcc/x86_64-linux-gnu/12/include)
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endif ()
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target_compile_features(fmt PUBLIC cxx_std_11)
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target_include_directories(fmt ${FMT_SYSTEM_HEADERS_ATTRIBUTE} PUBLIC
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@ -334,7 +391,6 @@ if (FMT_INSTALL)
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LIBRARY DESTINATION ${FMT_LIB_DIR}
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ARCHIVE DESTINATION ${FMT_LIB_DIR}
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PUBLIC_HEADER DESTINATION "${FMT_INC_DIR}/fmt"
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FILE_SET cxx_modules DESTINATION ${FMT_LIB_DIR}
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FRAMEWORK DESTINATION "."
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RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR})
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