Remove FindSDL2 find-module, use sdl2-config.cmake instead
This requires SDL >= 2.0.4.
Since <https://bugzilla.libsdl.org/show_bug.cgi?id=2464> was fixed in
SDL 2.0.4, SDL behaves as a CMake "config-file package", even if it was
not itself built using CMake: it installs a sdl2-config.cmake file to
${libdir}/cmake/SDL2, which tells CMake where to find SDL's headers and
library, analogous to a pkg-config .pc file.
As a result, we no longer need to copy/paste a "find-module package"
to be able to find a system copy of SDL >= 2.0.4 with find_package(SDL2).
Find-module packages are now discouraged by the CMake developers, in
favour of having upstream projects behave as config-file packages.
This results in a small API change: FindSDL2 used to set SDL2_INCLUDE_DIR
and SDL2_LIBRARY, but the standard behaviour for config-file packages is
to set <name>_INCLUDE_DIRS and <name>_LIBRARIES. Use the CONFIG keyword
to make sure we search in config-file package mode, and will not find a
FindSDL2.cmake in some other directory that implements the old interface.
In addition to deleting redundant code, this avoids some assumptions in
FindSDL2 about the layout of a SDL installation. The current libsdl2-dev
package in Debian breaks those assumptions; this is considered a bug
and will hopefully be fixed soon, but it illustrates how fragile these
assumptions can be. We can be more robust against different installation
layouts by relying on SDL's own CMake integration.
When linking to a copy of CMake in a non-standard location, users can
now set the SDL2_DIR or CMAKE_PREFIX_PATH environment variable to point
to it; previously, these users would have used the SDL2DIR environment
variable. This continues to be unnecessary if using matching system-wide
installations of CMake and SDL2, for example both from Debian.
enable_language(Pascal)
find_package(SDL2 REQUIRED CONFIG)
find_package(SDL2_image 2 REQUIRED)
find_package(SDL2_net 2 REQUIRED)
find_package(SDL2_ttf 2 REQUIRED)
find_package(SDL2_mixer 2 REQUIRED)
include(CheckLibraryExists)
include(${CMAKE_MODULE_PATH}/utils.cmake)
enable_language(Pascal)
add_flag_append(CMAKE_Pascal_FLAGS "-Cs2000000 -B")
add_flag_append(CMAKE_Pascal_FLAGS_DEBUG "-gv")
add_flag_append(CMAKE_Pascal_FLAGS_RELEASE "-Xs")
if(UNIX)
include(TargetArch)
target_architecture(CMAKE_TARGET_ARCHITECTURES)
if(${CMAKE_Pascal_COMPILER_VERSION} VERSION_GREATER 2.7 OR ${CMAKE_TARGET_ARCHITECTURES} MATCHES "x86_64" OR ${CMAKE_TARGET_ARCHITECTURES} MATCHES "i386")
add_flag_append(CMAKE_Pascal_FLAGS "-fPIC")
endif()
endif(UNIX)
# convert list into pascal array
if(FONTS_DIRS)
list(LENGTH FONTS_DIRS ndirs)
set(FONTS_DIRS_ARRAY "array [0..${ndirs}] of PChar = (")
foreach(fontdir ${FONTS_DIRS})
set(FONTS_DIRS_ARRAY "${FONTS_DIRS_ARRAY}\n_P'${fontdir}',")
endforeach(fontdir)
set(FONTS_DIRS_ARRAY "${FONTS_DIRS_ARRAY}\nnil);\n")
else(FONTS_DIRS)
set(FONTS_DIRS_ARRAY "array [0..1] of PChar = (nil, nil);")
endif(FONTS_DIRS)
configure_file(${CMAKE_CURRENT_SOURCE_DIR}/config.inc.in ${CMAKE_CURRENT_BINARY_DIR}/config.inc)
include_directories(${CMAKE_CURRENT_BINARY_DIR})
#set the sources with the correct order of dependencies so that cmake won't be confused
set(engine_sources
SDLh.pas
uSinTable.pas
uFloat.pas
uConsts.pas
LuaPas.pas
uTypes.pas
uVariables.pas
uUtils.pas
uMisc.pas
uConsole.pas
uCommands.pas
uDebug.pas
uKeyNames.pas
uInputHandler.pas
uTextures.pas
uRenderUtils.pas
uRender.pas
uCaptions.pas
uIO.pas
uChat.pas
uPhysFSLayer.pas
uSound.pas
ArgParsers.pas
uRandom.pas
uLocale.pas
uStats.pas
uCursor.pas
uVideoRec.pas
uAILandMarks.pas
adler32.pas
uLandTemplates.pas
uLandTexture.pas
uLandGraphics.pas
uLandPainted.pas
uLandOutline.pas
uLandGenMaze.pas
uLandGenPerlin.pas
uLandGenTemplateBased.pas
uLandUtils.pas
#this is where dependency tracking becomes hard
uStore.pas
uAmmos.pas
uLandObjects.pas
uLand.pas
uGearsList.pas
uCollisions.pas
uAIMisc.pas
uAIActions.pas
uAIAmmoTests.pas
uAI.pas
uWorld.pas
uVisualGearsList.pas
uVisualGearsHandlers.pas
uVisualGears.pas
uGears.pas
uGame.pas
uCommandHandlers.pas
uGearsRender.pas
uGearsHedgehog.pas
uGearsHandlers.pas
uGearsHandlersRope.pas
uGearsHandlersMess.pas
uGearsUtils.pas
uTeams.pas
#these interact with everything, so compile last
uScript.pas
)
if(${CMAKE_Pascal_COMPILER_VERSION} VERSION_LESS 2.2 OR # older versions are just ancient
(${CMAKE_Pascal_COMPILER_VERSION} VERSION_LESS 2.6 AND APPLE)) # because of 64bit and opengl bindings
message(FATAL_ERROR "Your FreePascal installation is too old (fpc ${CMAKE_Pascal_COMPILER_VERSION})!")
elseif(${CMAKE_Pascal_COMPILER_VERSION} VERSION_GREATER 2.4)
#enable INLINE only with a recent version of fpc
add_flag_prepend(CMAKE_Pascal_FLAGS_RELEASE -Si)
endif()
#generic folder where our libraries reside
add_flag_append(CMAKE_Pascal_FLAGS "-Fl${LIBRARY_OUTPUT_PATH}")
#DEPENDECIES AND EXECUTABLES SECTION
if(APPLE AND (NOT BUILD_ENGINE_LIBRARY))
#OpenGL deps
add_flag_append(CMAKE_Pascal_FLAGS "-k-framework -kCocoa")
add_flag_append(CMAKE_Pascal_FLAGS "-k-framework -kOpenGL")
#set the correct library or framework style depending on the main SDL
string(FIND "${SDL2_LIBRARIES}" "dylib" sdl_framework)
if(${sdl_framework} GREATER -1)
add_flag_append(CMAKE_Pascal_FLAGS "-k-lsdl2 -k-lsdl2_image -k-lsdl2_mixer -k-lsdl2_ttf -k-lsdl2_net")
else()
add_flag_append(CMAKE_Pascal_FLAGS "-k-framework -kSDL2 -k-framework -kSDL2_image -k-framework -kSDL2_mixer -k-framework -kSDL2_net -k-framework -kSDL2_net -k-framework -kSDL2_ttf")
endif()
endif()
if(LIBAV_FOUND)
add_subdirectory(avwrapper)
list(APPEND HW_LINK_LIBS avwrapper)
add_definitions(-dUSE_VIDEO_RECORDING)
endif()
if(NOT WIN32)
find_package_or_disable_msg(PNG NOPNG "Screenshots will be saved in BMP")
if(PNG_FOUND)
list(INSERT engine_sources 0 PNGh.pas)
list(REMOVE_AT PNG_LIBRARIES 1) #removing the zlib library path
get_filename_component(PNG_LIBRARY_DIR ${PNG_LIBRARIES} PATH)
add_flag_append(CMAKE_Pascal_FLAGS "-k-L${PNG_LIBRARY_DIR} -Fl${PNG_LIBRARY_DIR}")
add_definitions(-dPNG_SCREENSHOTS)
endif()
endif()
if(LUA_SYSTEM)
get_filename_component(LUA_LIBRARY_DIR ${LUA_LIBRARY} PATH)
get_filename_component(LUA_LIBRARY_NAME ${LUA_LIBRARY} NAME)
#NAME_WE would strip the .1 (or .2) next to the ".so"
string(REGEX REPLACE "${CMAKE_SHARED_LIBRARY_PREFIX}(.*)${CMAKE_SHARED_LIBRARY_SUFFIX}" "\\1" LUA_LIBRARY_NAME "${LUA_LIBRARY_NAME}")
add_flag_append(CMAKE_Pascal_FLAGS "-Fl${LUA_LIBRARY_DIR} -XLAlua=${LUA_LIBRARY_NAME}")
else()
add_definitions(-dLUA_INTERNAL)
list(APPEND HW_LINK_LIBS lua)
add_flag_append(CMAKE_Pascal_FLAGS "-XLAlua=${lua_output_name}")
endif()
# PhysFS
get_filename_component(PHYSFS_LIBRARY_DIR ${PHYSFS_LIBRARY} PATH)
add_flag_append(CMAKE_Pascal_FLAGS "-Fl${PHYSFS_LIBRARY}")
list(APPEND HW_LINK_LIBS physlayer)
#opengl 2
IF(GL2)
add_definitions(-dGL2)
ENDIF(GL2)
#needs to be last
add_definitions(-dDEBUGFILE)
# source files are with full path after this
set(sourcefiles_sofar "${CMAKE_CURRENT_SOURCE_DIR}/options.inc" "${CMAKE_CURRENT_BINARY_DIR}/config.inc")
foreach(loop_var ${engine_sources})
list(APPEND sourcefiles_sofar "${CMAKE_CURRENT_SOURCE_DIR}/${loop_var}")
endforeach(loop_var)
if (WIN32 AND VCPKG_TOOLCHAIN)
add_definitions(-dWIN32_VCPKG)
add_flag_append(CMAKE_Pascal_FLAGS_DEBUG "-dVCPKG_DEBUG")
endif()
if (WIN32_WIN64_CROSS_COMPILE)
add_flag_append(CMAKE_Pascal_FLAGS "-Px86_64 -Twin64")
endif()
#SOURCE AND PROGRAMS SECTION
if(BUILD_ENGINE_LIBRARY)
message("***Engine will be built as library (experimental)***")
if(APPLE)
if (${current_macosx_version} VERSION_GREATER "10.5")
# due to compiler/linker issues on Max OS X 10.6 -k-no_order_inits is needed to avoid linking fail
add_flag_prepend(CMAKE_Pascal_FLAGS "-k-no_order_inits")
endif()
endif()
#workaround for missing <TARGET> support during object generation
set(engine_output_name "${CMAKE_SHARED_LIBRARY_PREFIX}hwengine${CMAKE_SHARED_LIBRARY_SUFFIX}")
set(destination_dir ${target_library_install_dir})
add_flag_prepend(CMAKE_Pascal_FLAGS "-o${LIBRARY_OUTPUT_PATH}/${engine_output_name}")
add_definitions(-dHWLIBRARY)
set_source_files_properties(hwLibrary.pas PROPERTIES OBJECT_DEPENDS "${sourcefiles_sofar};${CMAKE_CURRENT_SOURCE_DIR}/hwengine.pas")
add_library(hwengine SHARED hwLibrary.pas)
else()
if(APPLE)
# Handle large linker install_names
add_flag_prepend(CMAKE_Pascal_FLAGS "-k-headerpad_max_install_names")
endif()
# no need to change name here because target has same name
set(engine_output_name "hwengine${CMAKE_EXECUTABLE_SUFFIX}")
set(destination_dir ${target_binary_install_dir})
set_source_files_properties(hwengine.pas PROPERTIES OBJECT_DEPENDS "${sourcefiles_sofar}")
add_executable(hwengine hwengine.pas)
endif()
#even though not actually used, this will trigger relink if any lib changes
target_link_libraries(hwengine ${HW_LINK_LIBS})
install(PROGRAMS "${EXECUTABLE_OUTPUT_PATH}/${engine_output_name}" DESTINATION ${destination_dir})