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cmake_minimum_required(VERSION 3.26)
project(libc++-modules LANGUAGES CXX)
# Enable CMake's module support
if(CMAKE_VERSION VERSION_LESS "3.27.0")
set(CMAKE_EXPERIMENTAL_CXX_MODULE_CMAKE_API "2182bf5c-ef0d-489a-91da-49dbc3090d2a")
else()
set(CMAKE_EXPERIMENTAL_CXX_MODULE_CMAKE_API "aa1f7df0-828a-4fcd-9afc-2dc80491aca7")
endif()
set(CMAKE_EXPERIMENTAL_CXX_MODULE_DYNDEP 1)
# Default to C++ extensions being off. Libc++'s modules support have trouble
# with extensions right now.
set(CMAKE_CXX_EXTENSIONS OFF)
# Propagates the CMake options to the modules.
#
# This uses the std module hard-coded since the std.compat module does not
# depend on these flags.
macro(compile_define_if_not condition def)
if (NOT ${condition})
target_compile_definitions(std PRIVATE ${def})
endif()
endmacro()
macro(compile_define_if condition def)
if (${condition})
target_compile_definitions(std PRIVATE ${def})
endif()
endmacro()
if(NOT @LIBCXX_ENABLE_THREADS@ OR NOT @LIBCXXABI_ENABLE_THREADS@ OR NOT @LIBCXX_ENABLE_MONOTONIC_CLOCK@)
message(FATAL_ERROR "Modules without thread support is not yet implemented.")
endif()
if(NOT @LIBCXX_ENABLE_FILESYSTEM@)
message(FATAL_ERROR "Modules without filesystem support is not yet implemented.")
endif()
if(NOT @LIBCXX_ENABLE_RANDOM_DEVICE@)
message(FATAL_ERROR "Modules without randome device support is not yet implemented.")
endif()
if(NOT @LIBCXX_ENABLE_UNICODE@)
message(FATAL_ERROR "Modules without Unicode support is not yet implemented.")
endif()
if(NOT @LIBCXX_ENABLE_EXCEPTIONS@ OR NOT @LIBCXXABI_ENABLE_EXCEPTIONS@)
message(FATAL_ERROR "Modules without exception support is not yet implemented.")
endif()
add_library(std)
target_sources(std
PUBLIC FILE_SET cxx_modules TYPE CXX_MODULES FILES
@LIBCXX_SOURCES_MODULE_STD@
)
target_compile_definitions(std PRIVATE _LIBCPP_ENABLE_EXPERIMENTAL)
target_include_directories(std SYSTEM PRIVATE @LIBCXX_CONFIGURED_INCLUDE_DIR@)
target_compile_options(std
PUBLIC
-nostdinc++
-Wno-reserved-module-identifier
-Wno-reserved-user-defined-literal
@LIBCXX_COMPILE_FLAGS@
)
set_target_properties(std
PROPERTIES
OUTPUT_NAME "c++std"
)
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