project(musl C ASM )
cmake_minimum_required(VERSION 3.0)

set(CMAKE_C_FLAGS
        "${CMAKE_C_FLAGS} \
        -fPIC \
        -nostdinc \
        -fsanitize=address \
        -fexceptions\
        -Wall \
        -std=c99 \
        -isysroot${CMAKE_SOURCE_DIR}/include \
        -D_XOPEN_SOURCE=700\
        -Os\
        -pipe"
)

set(CMAKE_EXE_LINKER_FLAGS
    "${CMAKE_EXE_LINKER_FLAGS} -nostdlib -shared -Wl,-e,_dlstart"
)
include_directories(
    "${CMAKE_SOURCE_DIR}/arch/generic/"
    "${CMAKE_SOURCE_DIR}/arch/${CMAKE_HOST_SYSTEM_PROCESSOR}"
    "${CMAKE_BINARY_DIR}"
    "${CMAKE_BINARY_DIR}/arch"
)

file(MAKE_DIRECTORY "${CMAKE_BINARY_DIR}/arch/bits/")

add_custom_target(alltypes
    COMMAND
        sed -f "${CMAKE_SOURCE_DIR}/tools/mkalltypes.sed" "${CMAKE_SOURCE_DIR}/arch/${CMAKE_HOST_SYSTEM_PROCESSOR}/bits/alltypes.h.in" "${CMAKE_SOURCE_DIR}/include/alltypes.h.in" >>  "${CMAKE_CURRENT_BINARY_DIR}/arch/bits/alltypes.h"
)

add_custom_target(syscall
    COMMAND
        sed -n -e s/__NR_/SYS_/p < "${CMAKE_SOURCE_DIR}/arch/${CMAKE_HOST_SYSTEM_PROCESSOR}/bits/syscall.h.in" >>  "${CMAKE_CURRENT_BINARY_DIR}/arch/bits/syscall.h"
)

execute_process(
    COMMAND
        sh tools/version.sh
    COMMAND_ECHO
        STDOUT
    RESULT_VARIABLE
        version
    WORKING_DIRECTORY
        ${CMAKE_SOURCE_DIR}
)

file(WRITE "${CMAKE_BINARY_DIR}/version.h" "#define VERSION \"${version}\"")

file(GLOB internalSrcs
    "${CMAKE_SOURCE_DIR}/src/internal/*.c"
)

file( GLOB muslSrcs
    "${CMAKE_SOURCE_DIR}/src/*.c"
    "${CMAKE_SOURCE_DIR}/src/aio/*.c"
    "${CMAKE_SOURCE_DIR}/src/conf/*.c"
    "${CMAKE_SOURCE_DIR}/src/ctype/*.c"
    "${CMAKE_SOURCE_DIR}/src/env/*.c"
    "${CMAKE_SOURCE_DIR}/src/exit/*.c"
    "${CMAKE_SOURCE_DIR}/src/fenv/${CMAKE_HOST_SYSTEM_PROCESSOR}/*.s"
    "${CMAKE_SOURCE_DIR}/src/ldso/*.c"
    "${CMAKE_SOURCE_DIR}/src/linux/*.c"
    "${CMAKE_SOURCE_DIR}/src/malloc/*.c"
    "${CMAKE_SOURCE_DIR}/src/misc/*.c"
    "${CMAKE_SOURCE_DIR}/src/mq/*.c"
    "${CMAKE_SOURCE_DIR}/src/network/*.c"
    "${CMAKE_SOURCE_DIR}/src/prng/*.c"
    "${CMAKE_SOURCE_DIR}/src/regex/*.c"
    "${CMAKE_SOURCE_DIR}/src/search/*.c"
    "${CMAKE_SOURCE_DIR}/src/setjmp/*.c"
    "${CMAKE_SOURCE_DIR}/src/stat/*.c"
    "${CMAKE_SOURCE_DIR}/src/stdlib/*.c"
    "${CMAKE_SOURCE_DIR}/src/temp/*.c"
    "${CMAKE_SOURCE_DIR}/src/thread/*.c"
    "${CMAKE_SOURCE_DIR}/src/unistd/*.c"
    "${CMAKE_SOURCE_DIR}/src/complex/*.c"
    "${CMAKE_SOURCE_DIR}/src/crypt/*.c"
    "${CMAKE_SOURCE_DIR}/src/dirent/*.c"
    "${CMAKE_SOURCE_DIR}/src/errno/*.c"
    "${CMAKE_SOURCE_DIR}/src/fcntl/*.c"
    "${CMAKE_SOURCE_DIR}/src/include/*.c"
    "${CMAKE_SOURCE_DIR}/src/ipc/*.c"
    "${CMAKE_SOURCE_DIR}/src/legacy/*.c"
    "${CMAKE_SOURCE_DIR}/src/locale/*.c"
    "${CMAKE_SOURCE_DIR}/src/mman/*.c"
    "${CMAKE_SOURCE_DIR}/src/multibyte/*.c"
    "${CMAKE_SOURCE_DIR}/src/passwd/*.c"
    "${CMAKE_SOURCE_DIR}/src/process/*.c"
    "${CMAKE_SOURCE_DIR}/src/sched/*.c"
    "${CMAKE_SOURCE_DIR}/src/select/*.c"
    "${CMAKE_SOURCE_DIR}/src/signal/*.c"
    "${CMAKE_SOURCE_DIR}/src/stdio/*.c"
    "${CMAKE_SOURCE_DIR}/src/string/*.c"
    "${CMAKE_SOURCE_DIR}/src/termios/*.c"
    "${CMAKE_SOURCE_DIR}/src/time/*.c"
)

macro(replace_list_item LIST OLD_VALUE NEW_VALUE)
    list(FIND ${LIST} ${OLD_VALUE} OLD_VALUE_INDEX)
    if(OLD_VALUE_INDEX GREATER_EQUAL 0)
        list(REMOVE_AT ${LIST} ${OLD_VALUE_INDEX})
        list(INSERT ${LIST} ${OLD_VALUE_INDEX} ${NEW_VALUE})
    endif()
endmacro()

foreach(arfp ${arch_fpenvSrcs})
    get_filename_component(arfname ${arfp} NAME_WLE)
    foreach(fp ${fpenvSrcs})
        get_filename_component(fpfname ${fp} NAME_WLE)
        if(${fpfname} STREQUAL ${arfname})
            replace_list_item(fpenvSrcs ${fp} ${arfp})
        endif()
    endforeach()
endforeach()

file (GLOB arch_mathsrc
    "${CMAKE_SOURCE_DIR}/src/math/${CMAKE_SYSTEM_PROCESSOR}/*.c"
    "${CMAKE_SOURCE_DIR}/src/math/${CMAKE_SYSTEM_PROCESSOR}/*.s"
)

file (GLOB mathsrc
    "${CMAKE_SOURCE_DIR}/src/math/*.c"
)

foreach(arfp ${arch_mathsrc})
    get_filename_component(arfname ${arfp} NAME_WLE)
    foreach(fp ${mathsrc})
        get_filename_component(fpfname ${fp} NAME_WLE)
        if(${fpfname} STREQUAL ${arfname})
            replace_list_item(mathsrc ${fp} ${arfp})
        endif()
    endforeach()
endforeach()

#obj/crt/rcrt1.o obj/ldso/dlstart.lo obj/ldso/dynlink.lo: $(srcdir)/src/internal/dynlink.h $(srcdir)/arch/$(ARCH)/reloc.h

#obj/crt/crt1.o obj/crt/scrt1.o obj/crt/rcrt1.o obj/ldso/dlstart.lo: $(srcdir)/arch/$(ARCH)/crt_arch.h

#obj/crt/rcrt1.o: $(srcdir)/ldso/dlstart.c

#obj/crt/Scrt1.o obj/crt/rcrt1.o: CFLAGS_ALL += -fPIC

add_library(internal OBJECT
    ${internalSrcs}

)

target_include_directories (internal PRIVATE
    "${CMAKE_SOURCE_DIR}/src/include"
)

target_include_directories (internal PUBLIC
    "${CMAKE_SOURCE_DIR}/include/"
)

target_precompile_headers(internal
PUBLIC
    "${CMAKE_BINARY_DIR}/arch/bits/alltypes.h"
    "${CMAKE_BINARY_DIR}/arch/bits/syscall.h"
PRIVATE
    "${CMAKE_SOURCE_DIR}/src/internal/stdio_impl.h"
    "${CMAKE_SOURCE_DIR}/src/internal/pthread_impl.h"
    "${CMAKE_SOURCE_DIR}/src/internal/locale_impl.h"
    "${CMAKE_SOURCE_DIR}/src/internal/libc.h"
)

add_dependencies(internal syscall alltypes)

#shared build
add_library(musl SHARED
    ${muslSrcs}
    ${fpenvSrcs}
    ${mathsrc}
)

add_dependencies(musl internal)

target_link_libraries(musl PRIVATE internal)

target_include_directories(musl PRIVATE
    "${CMAKE_SOURCE_DIR}/src/include"
    "${CMAKE_SOURCE_DIR}/src/internal"
)

set_target_properties(musl PROPERTIES OUTPUT_NAME c)


#statiuc build
add_library(musl-static STATIC
    ${muslSrcs}
    ${fpenvSrcs}
    ${mathsrc}
)

add_dependencies(musl-static internal)

target_link_libraries(musl-static PRIVATE internal)

target_include_directories(musl-static PRIVATE
    "${CMAKE_SOURCE_DIR}/src/include"
    "${CMAKE_SOURCE_DIR}/src/internal"
)

set_target_properties(musl-static PROPERTIES OUTPUT_NAME c)

install(
TARGETS
    musl
    musl-static
DESTINATION
    lib
)