src/libFLAC/CMakeLists.txt

cmake_minimum_required(VERSION 3.12)

if(CMAKE_SYSTEM_PROCESSOR MATCHES "[xX]86(_64)?|(AMD|amd)64|i[346]86")
    option(WITH_AVX "Enable AVX, AVX2 optimizations" ON)
    option(WITH_SSE "Enable AVX, AVX2 optimizations" ON)
endif()

check_c_compiler_flag(-msse2 HAVE_MSSE2_FLAG)
if(HAVE_MSSE2_FLAG AND WITH_SSE)
    add_compile_options(-msse2)
endif()

option(WITH_ASM "Use any assembly optimization routines" ON)

check_include_file("cpuid.h" HAVE_CPUID_H)
check_include_file("sys/param.h" HAVE_SYS_PARAM_H)

set(CMAKE_REQUIRED_LIBRARIES m)
check_function_exists(lround HAVE_LROUND)

add_compile_definitions(
    $<$<BOOL:${MSVC}>:_USE_MATH_DEFINES>
    FLAC__USE_AVX=$<BOOL:${WITH_AVX}>
    HAVE_LROUND=$<BOOL:${HAVE_LROUND}>
    $<$<BOOL:${HAVE_CPUID_H}>:HAVE_CPUID_H>
    $<$<OR:$<CONFIG:Debug>,$<CONFIG:RelWithDebInfo>>:FLAC__OVERFLOW_DETECT>)

if(CMAKE_SYSTEM_PROCESSOR MATCHES "[xX]86_64|(AMD|amd)64")
    if(CMAKE_SIZEOF_VOID_P EQUAL 4)
        set(IA32 TRUE)
    endif()
    add_compile_definitions(
        FLAC__CPU_X86_64
        FLAC__ALIGN_MALLOC_DATA)
elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "([xX]|i[346])86")
    set(IA32 TRUE)
    add_compile_definitions(
        FLAC__CPU_IA32
        FLAC__ALIGN_MALLOC_DATA)
endif()

include(CheckLanguage)
check_language(ASM_NASM)
if(CMAKE_ASM_NASM_COMPILER)
    enable_language(ASM_NASM)
    add_compile_definitions(FLAC__HAS_NASM)
endif()

if(NOT WITH_ASM)
    add_compile_definitions(FLAC__NO_ASM)
endif()

if(WITH_ASM AND IA32 AND CMAKE_ASM_NASM_COMPILER)
    add_subdirectory(ia32)
endif()

set(prefix "${CMAKE_INSTALL_PREFIX}")
set(exec_prefix "${CMAKE_INSTALL_PREFIX}")
set(libdir "${CMAKE_INSTALL_FULL_LIBDIR}")
set(includedir "${CMAKE_INSTALL_FULL_INCLUDEDIR}")
configure_file(flac.pc.in flac.pc @ONLY)

set(SOURCES
    bitmath.c
    bitreader.c
    bitwriter.c
    cpu.c
    crc.c
    fixed.c
    fixed_intrin_sse2.c
    fixed_intrin_ssse3.c
    float.c
    format.c
    lpc.c
    lpc_intrin_sse.c
    lpc_intrin_sse2.c
    lpc_intrin_sse41.c
    lpc_intrin_avx2.c
    lpc_intrin_vsx.c
    md5.c
    memory.c
    metadata_iterators.c
    metadata_object.c
    stream_decoder.c
    stream_encoder.c
    stream_encoder_intrin_sse2.c
    stream_encoder_intrin_ssse3.c
    stream_encoder_intrin_avx2.c
    stream_encoder_framing.c
    window.c
    $<$<BOOL:${OGG_FOUND}>:ogg_decoder_aspect.c>
    $<$<BOOL:${OGG_FOUND}>:ogg_encoder_aspect.c>
    $<$<BOOL:${OGG_FOUND}>:ogg_helper.c>
    $<$<BOOL:${OGG_FOUND}>:ogg_mapping.c>
    $<$<BOOL:${WIN32}>:windows_unicode_filenames.c>)

include_directories("include")

add_library(FLAC-static STATIC ${SOURCES})
target_compile_definitions(FLAC-static PUBLIC FLAC__NO_DLL)
target_include_directories(FLAC-static INTERFACE
    "$<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}/include>"
    "$<INSTALL_INTERFACE:${CMAKE_INSTALL_PREFIX}/include>")
target_link_libraries(FLAC-static PUBLIC
    $<TARGET_NAME_IF_EXISTS:Ogg::Ogg-static>
    $<TARGET_NAME_IF_EXISTS:FLAC-asm>
    $<$<BOOL:${HAVE_LROUND}>:m>)
if(TARGET Ogg::Ogg-static)
    target_link_libraries(FLAC-static PUBLIC
        $<TARGET_NAME_IF_EXISTS:Ogg::Ogg-static>)
elseif(TARGET Ogg::Ogg)
    target_link_libraries(FLAC-static PUBLIC
        $<TARGET_NAME_IF_EXISTS:Ogg::Ogg>)
endif()

add_library(FLAC SHARED ${SOURCES})
target_compile_definitions(FLAC PRIVATE FLAC_API_EXPORTS FLAC__USE_VISIBILITY_ATTR)
target_include_directories(FLAC INTERFACE
    "$<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}/include>"
    "$<INSTALL_INTERFACE:${CMAKE_INSTALL_PREFIX}/include>")
target_link_libraries(FLAC PRIVATE
    $<TARGET_NAME_IF_EXISTS:Ogg::Ogg>
    $<TARGET_NAME_IF_EXISTS:FLAC-asm>
    $<$<BOOL:${HAVE_LROUND}>:m>)
set_target_properties(FLAC PROPERTIES
    C_VISIBILITY_PRESET hidden
    VERSION 8.3.0
    SOVERSION 8)

install(TARGETS FLAC FLAC-static EXPORT targets
    ARCHIVE DESTINATION "${CMAKE_INSTALL_LIBDIR}/"
    LIBRARY DESTINATION "${CMAKE_INSTALL_LIBDIR}/"
    RUNTIME DESTINATION "${CMAKE_INSTALL_BINDIR}/")
install(FILES "${CMAKE_CURRENT_BINARY_DIR}/flac.pc"
    DESTINATION "${CMAKE_INSTALL_DATADIR}/pkgconfig")