cmake_minimum_required(VERSION 3.9)

project(chdr VERSION 0.2 LANGUAGES C)

if(CMAKE_PROJECT_NAME STREQUAL "chdr")
  option(BUILD_SHARED_LIBS "Build libchdr also as a shared library" ON)
endif()
option(INSTALL_STATIC_LIBS "Install static libraries" OFF)
option(WITH_SYSTEM_ZLIB "Use system provided zlib library" OFF)

option(BUILD_LTO "Compile libchdr with link-time optimization if supported" OFF)
if(BUILD_LTO)
  include(CheckIPOSupported)
  check_ipo_supported(RESULT HAVE_IPO)
  if(HAVE_IPO)
    set(CMAKE_INTERPROCEDURAL_OPTIMIZATION TRUE)
  endif()
endif()

include(GNUInstallDirs)

#--------------------------------------------------
# dependencies
#--------------------------------------------------


# lzma
add_subdirectory(deps/lzma-22.01 EXCLUDE_FROM_ALL)
  list(APPEND CHDR_LIBS lzma)
  list(APPEND CHDR_INCLUDES lzma)

# zlib
if (WITH_SYSTEM_ZLIB)
  find_package(ZLIB REQUIRED)
  list(APPEND PLATFORM_LIBS ZLIB::ZLIB)
else()
  add_subdirectory(deps/zlib-1.2.13 EXCLUDE_FROM_ALL)
  set_target_properties(zlibstatic PROPERTIES POSITION_INDEPENDENT_CODE ON)
  list(APPEND CHDR_LIBS zlibstatic)
  list(APPEND CHDR_INCLUDES "${CMAKE_CURRENT_SOURCE_DIR}/deps/zlib-1.2.13" "${CMAKE_CURRENT_BINARY_DIR}/deps/zlib-1.2.13")
endif()

#--------------------------------------------------
# chdr
#--------------------------------------------------

set(CHDR_SOURCES
  src/libchdr_bitstream.c
  src/libchdr_cdrom.c
  src/libchdr_chd.c
  src/libchdr_flac.c
  src/libchdr_huffman.c
)

list(APPEND CHDR_INCLUDES ${CMAKE_CURRENT_BINARY_DIR}/include)

add_library(chdr-static STATIC ${CHDR_SOURCES})
target_include_directories(chdr-static PRIVATE ${CHDR_INCLUDES} PUBLIC include)
target_link_libraries(chdr-static PRIVATE ${CHDR_LIBS} ${PLATFORM_LIBS})

if(MSVC)
  target_compile_definitions(chdr-static PRIVATE _CRT_SECURE_NO_WARNINGS)
endif()

if (INSTALL_STATIC_LIBS)
  install(TARGETS chdr-static ${CHDR_LIBS}
    ARCHIVE DESTINATION "${CMAKE_INSTALL_LIBDIR}"
  )
endif()

if (BUILD_SHARED_LIBS)
  add_library(chdr SHARED ${CHDR_SOURCES})
  target_include_directories(chdr PRIVATE ${CHDR_INCLUDES} PUBLIC include)
  target_link_libraries(chdr PRIVATE ${CHDR_LIBS} ${PLATFORM_LIBS})

  if(MSVC)
    target_compile_definitions(chdr PUBLIC "CHD_DLL")
    target_compile_definitions(chdr PRIVATE "CHD_DLL_EXPORTS")
    target_compile_definitions(chdr PRIVATE _CRT_SECURE_NO_WARNINGS)
  elseif(APPLE)
    target_link_libraries(chdr PRIVATE -Wl,-dead_strip -Wl,-exported_symbol,_chd_*)
  else()
    target_link_libraries(chdr PRIVATE -Wl,--version-script ${CMAKE_CURRENT_SOURCE_DIR}/src/link.T -Wl,--no-undefined)
  endif()

  set_target_properties(chdr PROPERTIES C_VISIBILITY_PRESET hidden)
  set_target_properties(chdr PROPERTIES VISIBILITY_INLINES_HIDDEN 1)
  set_target_properties(chdr PROPERTIES PUBLIC_HEADER "include/libchdr/bitstream.h;include/libchdr/cdrom.h;include/libchdr/chd.h;include/libchdr/chdconfig.h;include/libchdr/coretypes.h;include/libchdr/flac.h;include/libchdr/huffman.h")
  set_target_properties(chdr PROPERTIES VERSION "${PROJECT_VERSION_MAJOR}.${PROJECT_VERSION_MINOR}" SOVERSION ${PROJECT_VERSION_MAJOR})

  if (CMAKE_BUILD_TYPE MATCHES Release)
    #add_custom_command(TARGET chdr POST_BUILD COMMAND ${CMAKE_STRIP} libchdr.so)
  endif (CMAKE_BUILD_TYPE MATCHES Release)

  install(TARGETS chdr
    LIBRARY DESTINATION "${CMAKE_INSTALL_LIBDIR}"
    ARCHIVE DESTINATION "${CMAKE_INSTALL_LIBDIR}"
    PUBLIC_HEADER DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}/libchdr"
  )

  configure_file(pkg-config.pc.in ${CMAKE_BINARY_DIR}/libchdr.pc @ONLY)
  install(FILES ${CMAKE_BINARY_DIR}/libchdr.pc DESTINATION "${CMAKE_INSTALL_LIBDIR}/pkgconfig")
endif()

add_subdirectory(tests)