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67 lines
2.0 KiB
CMake
67 lines
2.0 KiB
CMake
#[[
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Custom find module for SDL for Emscripten compilation.
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Input variables:
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none
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Output variables:
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SDL2_FOUND
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SDL2_VERSION
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Resulting targets:
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SDL2::SDL2
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More info:
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https://emscripten.org/docs/porting/multimedia_and_graphics/OpenGL-support.html
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]]
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include(FindPackageHandleStandardArgs)
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include(FindPackageMessage)
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if(NOT TARGET SDL2::SDL2)
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# If no version was specified, set default
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if(NOT DEFINED SDL2_FIND_VERSION)
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set(SDL2_FIND_VERSION "2")
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endif()
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# Check if requested SDL version is valid
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if((SDL2_FIND_VERSION VERSION_LESS "2") OR (SDL2_FIND_VERSION VERSION_GREATER_EQUAL "3"))
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message(FATAL_ERROR "The requested SDL2 version ${SDL2_FIND_VERSION} is invalid.")
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endif()
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# Emscripten includes SDL support as part of it's SDK, meaning there's no need to find it
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set(SDL2_FOUND TRUE)
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add_library(SDL2::SDL2 INTERFACE IMPORTED)
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# Set found SDL version based on latest Emscripten SDK at the time of writing this file
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# Version set based on latest Emscripten SDK at the time of writing this file
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set(SDL2_VERSION "2.24.2")
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# Version number to pass to compiler
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set(SDL2_EMSCRIPTEN_COMPILER_SELECTED_VERSION "2")
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# Enable compilation and linking against SDL
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target_compile_options(SDL2::SDL2 INTERFACE "-sUSE_SDL=${SDL2_EMSCRIPTEN_COMPILER_SELECTED_VERSION}")
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target_link_libraries(SDL2::SDL2 INTERFACE "-sUSE_SDL=${SDL2_EMSCRIPTEN_COMPILER_SELECTED_VERSION}")
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# Get final compiler and linker flags to print them
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get_target_property(SDL2_COMPILE_FLAGS SDL2::SDL2 "INTERFACE_COMPILE_OPTIONS")
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get_target_property(SDL2_LINK_FLAGS SDL2::SDL2 "INTERFACE_LINK_OPTIONS")
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find_package_message(
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"SDL2"
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"SDL ${SDL2_VERSION} has been found as part of the Emscripten SDK."
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"[${SDL2_COMPILE_FLAGS}][${SDL2_LINK_FLAGS}]"
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)
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# Clean scope
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unset(SDL2_COMPILE_FLAGS)
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unset(SDL2_COMPILE_FLAGS)
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unset(SDL2_EMSCRIPTEN_COMPILER_SELECTED_VERSION)
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else()
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# Since the target already exists, we declare it as found
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set(SDL2_FOUND TRUE)
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if(NOT DEFINED SDL2_VERSION)
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set(SDL2_VERSION "UNKNOWN")
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endif()
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endif()
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