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cmake_minimum_required(VERSION 3.16)
list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_LIST_DIR}/cmake")
# See release_checklist.md
set(MAJOR_VERSION 2)
set(MINOR_VERSION 2)
set(MICRO_VERSION 0)
set(SDL_REQUIRED_VERSION 2.0.4)
set(DYLIB_COMPATIBILITY_VERSION "1")
include(PrivateSdlFunctions)
sdl_calculate_derived_version_variables()
if(CMAKE_SOURCE_DIR STREQUAL CMAKE_BINARY_DIR)
message(FATAL_ERROR "Prevented in-tree built. Please create a build directory outside of the SDL_net source code and call cmake from there")
endif()
project(SDL2_net
LANGUAGES C
VERSION "${FULL_VERSION}"
)
message(STATUS "Configuring ${PROJECT_NAME} ${PROJECT_VERSION}")
if(CMAKE_SOURCE_DIR STREQUAL PROJECT_SOURCE_DIR)
set(SDL2NET_ROOTPROJECT ON)
else()
set(SDL2NET_ROOTPROJECT OFF)
endif()
if(TARGET SDL2::SDL2test)
set(SDL2test_FOUND ON)
else()
find_package(SDL2test)
endif()
# Set defaults preventing destination file conflicts
set(SDL2NET_DEBUG_POSTFIX "d"
CACHE STRING "Name suffix for debug builds")
mark_as_advanced(SDL2NET_DEBUG_POSTFIX)
include(CMakeDependentOption)
include(CMakePackageConfigHelpers)
include(GNUInstallDirs)
option(CMAKE_POSITION_INDEPENDENT_CODE "Build static libraries with -fPIC" ON)
option(BUILD_SHARED_LIBS "Build the library as a shared library" ON)
option(SDL2NET_INSTALL "Enable SDL2_net install target" ${SDL2NET_ROOTPROJECT})
cmake_dependent_option(SDL2NET_SAMPLES "Build SDL2_net samples" ${SDL2NET_ROOTPROJECT} "${SDL2test_FOUND}" OFF)
if(SDL2NET_SAMPLES)
find_package(SDL2test REQUIRED)
endif()
# Save BUILD_SHARED_LIBS variable
set(SDL2NET_BUILD_SHARED_LIBS ${BUILD_SHARED_LIBS})
if(SDL2NET_BUILD_SHARED_LIBS)
set(sdl2_net_export_name SDL2_net)
set(sdl2_net_install_name_infix shared)
set(sdl2_target_name SDL2::SDL2)
else()
set(sdl2_net_export_name SDL2_net-static)
set(sdl2_net_install_name_infix static)
set(sdl2_target_name SDL2::SDL2-static)
endif()
sdl_find_sdl2(${sdl2_target_name} ${SDL_REQUIRED_VERSION})
add_library(SDL2_net
SDLnet.c
SDLnetselect.c
SDLnetTCP.c
SDLnetUDP.c
)
add_library(SDL2_net::${sdl2_net_export_name} ALIAS SDL2_net)
target_include_directories(SDL2_net PUBLIC
"$<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}>"
"$<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}/SDL2>"
)
target_compile_definitions(SDL2_net PRIVATE
BUILD_SDL
SDL_BUILD_MAJOR_VERSION=${MAJOR_VERSION}
SDL_BUILD_MINOR_VERSION=${MINOR_VERSION}
SDL_BUILD_MICRO_VERSION=${MICRO_VERSION}
)
target_link_libraries(SDL2_net PRIVATE $<BUILD_INTERFACE:${sdl2_target_name}>)
if(WIN32)
if (MSVC)
target_compile_options(SDL2_net PRIVATE /W3 /wd4244)
endif()
target_compile_definitions(SDL2_net PRIVATE _WINSOCK_DEPRECATED_NO_WARNINGS)
target_link_libraries(SDL2_net PRIVATE ws2_32 iphlpapi)
if(SDL2NET_BUILD_SHARED_LIBS)
target_sources(SDL2_net PRIVATE version.rc)
endif()
endif()
set_target_properties(SDL2_net PROPERTIES
DEFINE_SYMBOL DLL_EXPORT
EXPORT_NAME ${sdl2_net_export_name}
C_VISIBILITY_PRESET "hidden"
)
if(NOT ANDROID)
set_target_properties(SDL2_net PROPERTIES
DEBUG_POSTFIX "${SDL2NET_DEBUG_POSTFIX}"
)
if(APPLE)
# the SOVERSION property corresponds to the compatibility version and VERSION corresponds to the current version
# https://cmake.org/cmake/help/latest/prop_tgt/SOVERSION.html#mach-o-versions
set_target_properties(SDL2_net PROPERTIES
SOVERSION "${DYLIB_COMPATIBILITY_VERSION}"
VERSION "${DYLIB_CURRENT_VERSION}"
)
else()
set_target_properties(SDL2_net PROPERTIES
SOVERSION "${LT_MAJOR}"
VERSION "${LT_VERSION}"
)
endif()
endif()
if(SDL2NET_BUILD_SHARED_LIBS AND (APPLE OR (UNIX AND NOT ANDROID)))
add_custom_command(TARGET SDL2_net POST_BUILD
COMMAND "${CMAKE_COMMAND}" -E create_symlink "$<TARGET_SONAME_FILE_NAME:SDL2_net>" "libSDL2_net$<$<CONFIG:Debug>:${SDL2NET_DEBUG_POSTFIX}>$<TARGET_FILE_SUFFIX:SDL2_net>"
WORKING_DIRECTORY "${PROJECT_BINARY_DIR}"
)
endif()
if(SDL2NET_BUILD_SHARED_LIBS)
if(WIN32 OR OS2)
set_target_properties(SDL2_net PROPERTIES
PREFIX ""
)
endif()
if(OS2)
# FIXME: OS/2 Makefile has a different LIBNAME
set_target_properties(SDL2_net PROPERTIES
OUTPUT_NAME "SDL2net"
)
elseif(UNIX AND NOT ANDROID)
set_target_properties(SDL2_net PROPERTIES
OUTPUT_NAME "SDL2_net-${LT_RELEASE}"
)
endif()
else()
if(MSVC OR (WATCOM AND (WIN32 OR OS2)))
set_target_properties(SDL2_net PROPERTIES
OUTPUT_NAME "SDL2_net-static"
)
endif()
endif()
# Use `Compatible Interface Properties` to ensure a shared SDL2_net is built with a shared SDL2
if(SDL2NET_BUILD_SHARED_LIBS)
set_target_properties(SDL2_net PROPERTIES
INTERFACE_SDL2_SHARED ${SDL2NET_BUILD_SHARED_LIBS}
COMPATIBLE_INTERFACE_BOOL SDL2_SHARED
)
endif()
if(SDL2NET_BUILD_SHARED_LIBS)
sdl_target_link_options_no_undefined(SDL2_net)
endif()
if(SDL2NET_INSTALL)
install(
TARGETS SDL2_net
EXPORT SDL2NetExports
ARCHIVE DESTINATION "${CMAKE_INSTALL_LIBDIR}" COMPONENT devel
LIBRARY DESTINATION "${CMAKE_INSTALL_LIBDIR}" COMPONENT library
RUNTIME DESTINATION "${CMAKE_INSTALL_BINDIR}" COMPONENT library
)
install(FILES
"${CMAKE_CURRENT_SOURCE_DIR}/SDL_net.h"
DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}/SDL2" COMPONENT devel
)
if(WIN32 AND NOT MINGW)
set(PKG_PREFIX "cmake")
else()
set(PKG_PREFIX "${CMAKE_INSTALL_LIBDIR}/cmake/SDL2_net")
endif()
configure_package_config_file(SDL2_netConfig.cmake.in SDL2_netConfig.cmake
INSTALL_DESTINATION "${PKG_PREFIX}"
)
write_basic_package_version_file("${PROJECT_BINARY_DIR}/SDL2_netConfigVersion.cmake"
VERSION ${FULL_VERSION}
COMPATIBILITY AnyNewerVersion
)
install(
FILES
"${CMAKE_CURRENT_BINARY_DIR}/SDL2_netConfig.cmake"
"${CMAKE_CURRENT_BINARY_DIR}/SDL2_netConfigVersion.cmake"
DESTINATION "${PKG_PREFIX}"
COMPONENT devel
)
install(EXPORT SDL2NetExports
FILE SDL2_net-${sdl2_net_install_name_infix}-targets.cmake
NAMESPACE SDL2_net::
DESTINATION "${PKG_PREFIX}"
COMPONENT devel
)
if(SDL2NET_BUILD_SHARED_LIBS)
# Only create a .pc file for a shared SDL2_net
set(prefix "${CMAKE_INSTALL_PREFIX}")
set(exec_prefix "\${prefix}")
set(libdir "\${exec_prefix}/${CMAKE_INSTALL_LIBDIR}")
set(includedir "\${prefix}/${CMAKE_INSTALL_INCLUDEDIR}")
set(PACKAGE "${PROJECT_NAME}")
set(VERSION "${FULL_VERSION}")
set(SDL_VERSION "${SDL_REQUIRED_VERSION}")
string(JOIN " " PC_REQUIRES ${PC_REQUIRES})
string(JOIN " " PC_LIBS ${PC_LIBS})
configure_file("${PROJECT_SOURCE_DIR}/SDL2_net.pc.in" "${CMAKE_CURRENT_BINARY_DIR}/SDL2_net.pc.intermediate" @ONLY)
file(GENERATE OUTPUT "${CMAKE_CURRENT_BINARY_DIR}/SDL2_net-$<CONFIG>.pc" INPUT "${CMAKE_CURRENT_BINARY_DIR}/SDL2_net.pc.intermediate")
set(PC_DESTDIR)
if(CMAKE_SYSTEM_NAME MATCHES FreeBSD)
# FreeBSD uses ${PREFIX}/libdata/pkgconfig
set(PC_DESTDIR "libdata/pkgconfig")
else()
set(PC_DESTDIR "${CMAKE_INSTALL_LIBDIR}/pkgconfig")
endif()
# Only install a SDL2_net.pc file in Release mode
install(CODE "
if(CMAKE_INSTALL_CONFIG_NAME MATCHES \"Release\")
# FIXME: use file(COPY_FILE) if minimum CMake version >= 3.21
execute_process(COMMAND \"\${CMAKE_COMMAND}\" -E copy_if_different
\"${CMAKE_CURRENT_BINARY_DIR}/SDL2_net-$<CONFIG>.pc\"
\"${CMAKE_CURRENT_BINARY_DIR}/SDL2_net.pc\")
file(INSTALL DESTINATION \"\${CMAKE_INSTALL_PREFIX}/${PC_DESTDIR}\"
TYPE FILE
FILES \"${CMAKE_CURRENT_BINARY_DIR}/SDL2_net.pc\")
endif()" COMPONENT devel)
endif()
if(SDL2NET_BUILD_SHARED_LIBS AND (APPLE OR (UNIX AND NOT ANDROID)))
install(
FILES
"${PROJECT_BINARY_DIR}/libSDL2_net$<$<CONFIG:Debug>:${SDL2NET_DEBUG_POSTFIX}>$<TARGET_FILE_SUFFIX:SDL2_net>"
DESTINATION "${CMAKE_INSTALL_LIBDIR}"
COMPONENT devel
)
endif()
install(FILES "LICENSE.txt"
DESTINATION "${CMAKE_INSTALL_DATAROOTDIR}/licenses/${PROJECT_NAME}"
COMPONENT library
)
endif()
if(SDL2NET_SAMPLES)
find_package(SDL2main)
add_executable(showinterfaces showinterfaces.c)
target_compile_definitions(showinterfaces PRIVATE SDL_MAIN_HANDLED)
target_link_libraries(showinterfaces PRIVATE SDL2_net::${sdl2_net_export_name} ${sdl2_target_name})
add_executable(chat chat.c chat.h)
if(TARGET SDL2::SDL2main)
target_link_libraries(chat PRIVATE SDL2::SDL2main)
endif()
target_link_libraries(chat PRIVATE SDL2_net::${sdl2_net_export_name} SDL2::SDL2test ${sdl2_target_name})
add_executable(chatd chatd.c)
target_compile_definitions(chatd PRIVATE SDL_MAIN_HANDLED)
target_link_libraries(chatd PRIVATE SDL2_net::${sdl2_net_export_name} ${sdl2_target_name})
endif()
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