serenity/Userland/Libraries/LibC/CMakeLists.txt

set(LIBC_SOURCES
    arpa/inet.cpp
    assert.cpp
    ctype.cpp
    cxxabi.cpp
    dirent.cpp
    dlfcn.cpp
    fcntl.cpp
    fenv.cpp
    fnmatch.cpp
    ifaddrs.cpp
    getopt.cpp
    getsubopt.cpp
    glob.cpp
    grp.cpp
    inttypes.cpp
    ioctl.cpp
    langinfo.cpp
    libcinit.cpp
    libgen.cpp
    link.cpp
    locale.cpp
    malloc.cpp
    math.cpp
    mntent.cpp
    net.cpp
    netdb.cpp
    poll.cpp
    priority.cpp
    pthread.cpp
    pthread_cond.cpp
    pthread_integration.cpp
    pthread_once.cpp
    pthread_tls.cpp
    pty.cpp
    pwd.cpp
    qsort.cpp
    regex.cpp
    resolv.cpp
    scanf.cpp
    sched.cpp
    search.cpp
    semaphore.cpp
    serenity.cpp
    shadow.cpp
    signal.cpp
    spawn.cpp
    ssp.cpp
    stat.cpp
    stdio.cpp
    stdlib.cpp
    string.cpp
    strings.cpp
    stubs.cpp
    sys/auxv.cpp
    sys/file.cpp
    sys/mman.cpp
    sys/prctl.cpp
    sys/ptrace.cpp
    sys/select.cpp
    sys/socket.cpp
    sys/statvfs.cpp
    sys/uio.cpp
    sys/wait.cpp
    syslog.cpp
    termcap.cpp
    termios.cpp
    time.cpp
    times.cpp
    ulimit.cpp
    unistd.cpp
    utime.cpp
    utsname.cpp
    wchar.cpp
    wctype.cpp
    wstdio.cpp
)

file(GLOB_RECURSE LIBC_HEADERS RELATIVE "${CMAKE_CURRENT_SOURCE_DIR}" CONFIGURE_DEPENDS "*.h")
list(APPEND LIBC_HEADERS "../LibELF/ELFABI.h" "../LibRegex/RegexDefs.h")

add_custom_target(install_libc_headers)

# Copy LibC's headers into the sysroot to satisfy libc++'s include priority requirements.
foreach(RELATIVE_HEADER_PATH IN LISTS LIBC_HEADERS)
    get_filename_component(directory ${RELATIVE_HEADER_PATH} DIRECTORY)
    string(REPLACE "../" "" subdirectory "${directory}")
    file(MAKE_DIRECTORY "${CMAKE_STAGING_PREFIX}/${CMAKE_INSTALL_INCLUDEDIR}/${subdirectory}")
    add_custom_command(
        TARGET install_libc_headers
        PRE_BUILD
        COMMAND "${CMAKE_COMMAND}" -E copy_if_different "${RELATIVE_HEADER_PATH}" "${CMAKE_STAGING_PREFIX}/${CMAKE_INSTALL_INCLUDEDIR}/${subdirectory}"
        WORKING_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}"
        VERBATIM
    )
endforeach()

file(GLOB ELF_SOURCES CONFIGURE_DEPENDS "../LibELF/*.cpp")

if ("${SERENITY_ARCH}" STREQUAL "aarch64")
    set(ASM_SOURCES "arch/aarch64/setjmp.S")
    set(ELF_SOURCES ${ELF_SOURCES} ../LibELF/Arch/aarch64/entry.S ../LibELF/Arch/aarch64/plt_trampoline.S)
    set(CRTI_SOURCE "arch/aarch64/crti.S")
    set(CRTN_SOURCE "arch/aarch64/crtn.S")
elseif ("${SERENITY_ARCH}" STREQUAL "x86_64")
    set(LIBC_SOURCES ${LIBC_SOURCES} "arch/x86_64/memset.cpp")
    set(ASM_SOURCES "arch/x86_64/setjmp.S" "arch/x86_64/memset.S")
    set(ELF_SOURCES ${ELF_SOURCES} ../LibELF/Arch/x86_64/entry.S ../LibELF/Arch/x86_64/plt_trampoline.S)
    set(CRTI_SOURCE "arch/x86_64/crti.S")
    set(CRTN_SOURCE "arch/x86_64/crtn.S")
endif()

set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-unknown-warning-option")

# Note: We link all these against NoCoverage so that we don't break ports by requiring coverage symbols
# in runtime/startup objects.
# Since all native serenity applications use dynamic libraries, prevent coverage on libc.a as well

add_library(crt0 STATIC crt0.cpp)
add_dependencies(crt0 install_libc_headers)
target_link_libraries(crt0 PRIVATE NoCoverage)
add_custom_command(
    TARGET crt0
    COMMAND "${CMAKE_COMMAND}" -E copy $<TARGET_OBJECTS:crt0> ${CMAKE_INSTALL_PREFIX}/usr/lib/crt0.o
)
add_library(crt0_shared STATIC crt0_shared.cpp)
add_dependencies(crt0_shared install_libc_headers)
target_link_libraries(crt0_shared PRIVATE NoCoverage)
add_custom_command(
    TARGET crt0_shared
    COMMAND "${CMAKE_COMMAND}" -E copy $<TARGET_OBJECTS:crt0_shared> ${CMAKE_INSTALL_PREFIX}/usr/lib/crt0_shared.o
)

add_library(crti STATIC ${CRTI_SOURCE})
target_link_libraries(crti PRIVATE NoCoverage)
add_custom_command(
    TARGET crti
    COMMAND "${CMAKE_COMMAND}" -E copy $<TARGET_OBJECTS:crti> ${CMAKE_INSTALL_PREFIX}/usr/lib/crti.o
)

add_library(crtn STATIC ${CRTN_SOURCE})
target_link_libraries(crtn PRIVATE NoCoverage)
add_custom_command(
    TARGET crtn
    COMMAND "${CMAKE_COMMAND}" -E copy $<TARGET_OBJECTS:crtn> ${CMAKE_INSTALL_PREFIX}/usr/lib/crtn.o
)

set_source_files_properties (ssp_nonshared.cpp PROPERTIES COMPILE_FLAGS "-fno-stack-protector")
add_library(ssp_nonshared STATIC ssp_nonshared.cpp)
add_dependencies(ssp_nonshared install_libc_headers)
target_link_libraries(ssp_nonshared PRIVATE NoCoverage)
install(FILES ${CMAKE_CURRENT_BINARY_DIR}/libssp_nonshared.a DESTINATION ${CMAKE_INSTALL_PREFIX}/usr/lib/)

set(SOURCES ${LIBC_SOURCES} ${AK_SOURCES} ${ELF_SOURCES} ${ASM_SOURCES})

# Prevent GCC from removing null checks by marking the `FILE*` argument non-null
set_source_files_properties(stdio.cpp PROPERTIES COMPILE_FLAGS "-fno-builtin-fputc -fno-builtin-fputs -fno-builtin-fwrite")

# Prevent naively implemented string functions (like strlen) from being "optimized" into a call to themselves.
if (CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
    set_source_files_properties(string.cpp wchar.cpp PROPERTIES COMPILE_FLAGS "-fno-tree-loop-distribution -fno-tree-loop-distribute-patterns")
endif()

set_source_files_properties(ssp.cpp PROPERTIES COMPILE_FLAGS "-fno-stack-protector")

add_library(LibCStaticWithoutDeps STATIC ${SOURCES})
target_link_libraries(LibCStaticWithoutDeps PUBLIC ssp LibTimeZone PRIVATE NoCoverage)
add_dependencies(LibCStaticWithoutDeps LibSystem LibUBSanitizer)

add_custom_target(LibCStatic
        COMMAND ${CMAKE_AR} -x $<TARGET_FILE:LibCStaticWithoutDeps>
        COMMAND ${CMAKE_AR} -x $<TARGET_FILE:LibSystemStatic>
        COMMAND ${CMAKE_AR} -x $<TARGET_FILE:LibUBSanitizerStatic>
        COMMAND ${CMAKE_AR} -rcs ${CMAKE_CURRENT_BINARY_DIR}/libc.a *.o
        WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
        DEPENDS LibCStaticWithoutDeps LibSystemStatic LibUBSanitizerStatic
        )

install(FILES ${CMAKE_CURRENT_BINARY_DIR}/libc.a DESTINATION ${CMAKE_INSTALL_PREFIX}/usr/lib/)
file(GLOB TEMP_OBJ_FILES ${CMAKE_CURRENT_BINARY_DIR}/*.o)
set_property(
        TARGET LibCStatic
        APPEND
        PROPERTY ADDITIONAL_CLEAN_FILES ${TEMP_OBJ_FILES}
)

set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -nolibc")
serenity_libc(LibC c)
add_dependencies(LibC crti crt0 crt0_shared crtn install_libc_headers)
target_link_libraries(LibC PRIVATE LibSystem LibTimeZone)

# We mark LibCStatic as a dependency of LibC because this triggers the build of the LibCStatic target
add_dependencies(LibC LibCStatic)

# Provide a linker script instead of various other libraries that tells everything to link against LibC.
file(WRITE "${CMAKE_STAGING_PREFIX}/${CMAKE_INSTALL_LIBDIR}/libpthread.so" "INPUT(libc.so)")
file(WRITE "${CMAKE_STAGING_PREFIX}/${CMAKE_INSTALL_LIBDIR}/libdl.so" "INPUT(libc.so)")
file(WRITE "${CMAKE_STAGING_PREFIX}/${CMAKE_INSTALL_LIBDIR}/libm.so" "INPUT(libc.so)")
file(WRITE "${CMAKE_STAGING_PREFIX}/${CMAKE_INSTALL_LIBDIR}/libssp.so" "INPUT(libc.so)")