if(EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/${LIBC_TARGET_OS}) add_subdirectory(${CMAKE_CURRENT_SOURCE_DIR}/${LIBC_TARGET_OS}) endif() add_entrypoint_object( mmap ALIAS DEPENDS .${LIBC_TARGET_OS}.mmap ) add_entrypoint_object( munmap ALIAS DEPENDS .${LIBC_TARGET_OS}.munmap )