cmake build static/shared with two demo opengl3+{sdl3,glfw}
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Charles Wong
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8ab8965713
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deb4d73317
237
CMakeLists.txt
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237
CMakeLists.txt
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cmake_minimum_required(VERSION 3.25)
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project(imgui VERSION 1.90.8 LANGUAGES CXX)
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set(imgui_VERSION "${imgui_VERSION}-WIP")
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if(IMGUI_COMMIT_HASH)
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set(imgui_VERSION "${imgui_VERSION}-g${IMGUI_COMMIT_HASH}")
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endif()
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if(NOT CMAKE_BUILD_TYPE)
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set(CMAKE_BUILD_TYPE Release)
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endif()
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set(CMAKE_DEBUG_POSTFIX d)
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set(CMAKE_CXX_STANDARD 20)
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set(CMAKE_CXX_STANDARD_REQUIRED)
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option(IMGUI_BUILD_EXAMPLES "Build ImGUI Examples" OFF)
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option(BUILD_SHARED_LIBS "Build shared library by default" ON)
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option(CMAKE_POSITION_INDEPENDENT_CODE "Enable PIC for all" ON)
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option(CMAKE_VERBOSE_MAKEFILE "Enable Makefile verbose output" OFF)
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option(CMAKE_EXPORT_COMPILE_COMMANDS "Export compile cmds as JSON" OFF)
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option(IMGUI_IMPL_COMBINE_STATIC "Combine static IMPL into libimgui.a" ON)
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include(CMakeDependentOption)
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# TODO Add more graphical backends
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# NOTE Linux show current OpenGL version: $ glxinfo | grep version
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# NOTE set <CMAKE_PREFIX_PATH> for none standard install of SDL3, GLFW, etc.
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cmake_dependent_option(IMGUI_BUILD_IMPL_directx "Build GB/IMPL DirectX" ON "WIN32" OFF)
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cmake_dependent_option(IMGUI_BUILD_IMPL_vulkan "Build GB/IMPL Vulkan" OFF "UNIX" OFF)
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cmake_dependent_option(IMGUI_BUILD_IMPL_opengl3 "Build GB/IMPL OpenGL" ON "UNIX" OFF)
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cmake_dependent_option(IMGUI_BUILD_IMPL_sdl3 "Build GB/IMPL SDL" ON "UNIX" OFF)
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cmake_dependent_option(IMGUI_BUILD_IMPL_glfw "Build GB/IMPL GLFW" ON "UNIX" OFF)
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# https://cmake.org/cmake/help/latest/module/FindOpenGL.html
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if(IMGUI_BUILD_EXAMPLES AND IMGUI_BUILD_IMPL_opengl3)
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find_package(OpenGL REQUIRED) # apt show libopengl-dev
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set(IMGUI_IMPL_API_opengl3 ${CMAKE_SOURCE_DIR}/backends/imgui_impl_opengl3.h)
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set(IMGUI_IMPL_SRC_opengl3 ${CMAKE_SOURCE_DIR}/backends/imgui_impl_opengl3.cpp)
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endif()
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if(IMGUI_BUILD_EXAMPLES AND IMGUI_BUILD_IMPL_sdl3)
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find_package(SDL3 REQUIRED) # apt show libsdl{2,3}-dev
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set(IMGUI_IMPL_API_sdl3 ${CMAKE_SOURCE_DIR}/backends/imgui_impl_sdl3.h)
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set(IMGUI_IMPL_SRC_sdl3 ${CMAKE_SOURCE_DIR}/backends/imgui_impl_sdl3.cpp)
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endif()
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if(IMGUI_BUILD_EXAMPLES AND IMGUI_BUILD_IMPL_glfw)
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find_package(glfw3 REQUIRED) # apt show libglfw3
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set(IMGUI_IMPL_API_glfw ${CMAKE_SOURCE_DIR}/backends/imgui_impl_glfw.h)
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set(IMGUI_IMPL_SRC_glfw ${CMAKE_SOURCE_DIR}/backends/imgui_impl_glfw.cpp)
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endif()
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set(IMGUI_HEADER_FILES
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${CMAKE_SOURCE_DIR}/imgui.h
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${CMAKE_SOURCE_DIR}/imconfig.h
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)
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set(IMGUI_SOURCE_FILES
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${CMAKE_SOURCE_DIR}/imgui.cpp
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${CMAKE_SOURCE_DIR}/imgui_demo.cpp
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${CMAKE_SOURCE_DIR}/imgui_draw.cpp
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${CMAKE_SOURCE_DIR}/imgui_tables.cpp
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${CMAKE_SOURCE_DIR}/imgui_widgets.cpp
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)
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if(BUILD_SHARED_LIBS)
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set(xLibType SHARED)
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set(IMGUI_IMPL_COMBINE_STATIC OFF)
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else()
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set(xLibType STATIC)
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endif()
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add_library(imgui ${xLibType}
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${IMGUI_HEADER_FILES}
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${IMGUI_SOURCE_FILES}
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# Internal Private Headers
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${CMAKE_SOURCE_DIR}/imgui_internal.h
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${CMAKE_SOURCE_DIR}/imstb_rectpack.h
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${CMAKE_SOURCE_DIR}/imstb_textedit.h
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${CMAKE_SOURCE_DIR}/imstb_truetype.h
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)
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target_include_directories(imgui PUBLIC
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$<BUILD_INTERFACE:${CMAKE_SOURCE_DIR}>
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$<INSTALL_INTERFACE:include>
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)
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if(IMGUI_BUILD_EXAMPLES AND IMGUI_BUILD_IMPL_opengl3)
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if(IMGUI_IMPL_COMBINE_STATIC)
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target_sources(imgui PRIVATE
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${IMGUI_IMPL_API_opengl3}
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${IMGUI_IMPL_SRC_opengl3}
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)
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target_include_directories(imgui PUBLIC
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$<BUILD_INTERFACE:${CMAKE_SOURCE_DIR}>
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$<INSTALL_INTERFACE:include>
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)
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target_link_libraries(imgui PUBLIC OpenGL::GL)
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else()
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add_library(imgui-impl-opengl3 ${xLibType}
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${IMGUI_IMPL_API_opengl3}
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${IMGUI_IMPL_SRC_opengl3}
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)
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target_include_directories(imgui-impl-opengl3 PUBLIC
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$<BUILD_INTERFACE:${CMAKE_SOURCE_DIR}>
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$<INSTALL_INTERFACE:include>
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)
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target_link_libraries(imgui-impl-opengl3 PUBLIC OpenGL::GL)
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endif()
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endif()
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if(IMGUI_BUILD_EXAMPLES AND IMGUI_BUILD_IMPL_sdl3)
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if(IMGUI_IMPL_COMBINE_STATIC)
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target_sources(imgui PRIVATE
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${IMGUI_IMPL_API_sdl3}
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${IMGUI_IMPL_SRC_sdl3}
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)
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target_include_directories(imgui PUBLIC
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$<BUILD_INTERFACE:${CMAKE_SOURCE_DIR}>
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$<INSTALL_INTERFACE:include>
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)
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target_link_libraries(imgui PUBLIC SDL3::SDL3)
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target_compile_options(imgui PUBLIC -DSDL_ENABLE_OLD_NAMES)
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else()
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add_library(imgui-impl-sdl3 ${xLibType}
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${IMGUI_IMPL_API_sdl3}
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${IMGUI_IMPL_SRC_sdl3}
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)
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target_include_directories(imgui-impl-sdl3 PUBLIC
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$<BUILD_INTERFACE:${CMAKE_SOURCE_DIR}>
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$<INSTALL_INTERFACE:include>
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)
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target_link_libraries(imgui-impl-sdl3 PUBLIC SDL3::SDL3)
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# TODO use SDL3 New Name and this can be safely removed
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target_compile_options(imgui-impl-sdl3 PUBLIC -DSDL_ENABLE_OLD_NAMES)
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endif()
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endif()
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if(IMGUI_BUILD_EXAMPLES AND IMGUI_BUILD_IMPL_glfw)
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if(IMGUI_IMPL_COMBINE_STATIC)
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target_sources(imgui PRIVATE
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${IMGUI_IMPL_API_glfw}
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${IMGUI_IMPL_SRC_glfw}
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)
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target_include_directories(imgui PUBLIC
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$<BUILD_INTERFACE:${CMAKE_SOURCE_DIR}>
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$<INSTALL_INTERFACE:include>
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)
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target_link_libraries(imgui PUBLIC glfw)
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else()
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add_library(imgui-impl-glfw ${xLibType}
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${IMGUI_IMPL_API_glfw}
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${IMGUI_IMPL_SRC_glfw}
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)
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target_include_directories(imgui-impl-glfw PUBLIC
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$<BUILD_INTERFACE:${CMAKE_SOURCE_DIR}>
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$<INSTALL_INTERFACE:include>
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)
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target_link_libraries(imgui-impl-glfw PUBLIC glfw)
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endif()
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endif()
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install(TARGETS imgui DESTINATION lib EXPORT imgui-targets)
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export(TARGETS imgui NAMESPACE imgui:: FILE imgui-targets.cmake)
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install(EXPORT imgui-targets NAMESPACE imgui::
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DESTINATION lib/cmake/imgui
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)
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install(FILES ${IMGUI_HEADER_FILES}
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DESTINATION include/imgui
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)
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if(IMGUI_BUILD_EXAMPLES)
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foreach(xIMPL opengl3 sdl3 glfw vulkan)
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if(IMGUI_BUILD_IMPL_${xIMPL})
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if(NOT IMGUI_IMPL_COMBINE_STATIC)
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install(TARGETS imgui-impl-${xIMPL}
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DESTINATION lib EXPORT imgui-${xIMPL}-targets
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)
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export(TARGETS imgui-impl-${xIMPL} NAMESPACE imgui-impl::
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FILE imgui-${xIMPL}-targets.cmake
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)
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install(EXPORT imgui-${xIMPL}-targets NAMESPACE imgui-impl::
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DESTINATION lib/cmake/imgui
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)
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endif()
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install(FILES ${IMGUI_IMPL_API_${xIMPL}}
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DESTINATION include/imgui/impl RENAME ${xIMPL}.h
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)
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endif()
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endforeach()
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endif()
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include(CMakePackageConfigHelpers)
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write_basic_package_version_file(
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"${CMAKE_CURRENT_BINARY_DIR}/imgui-config-version.cmake"
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VERSION "${imgui_VERSION}" COMPATIBILITY AnyNewerVersion
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)
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install(FILES
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"${CMAKE_CURRENT_BINARY_DIR}/imgui-config-version.cmake"
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DESTINATION lib/cmake/imgui
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)
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if(IMGUI_BUILD_EXAMPLES)
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string(TOLOWER "${xLibType}" xLibType)
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# xGLP = Graphical Library Platform, xGRL = Graphical Renderer Library
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foreach(xGLP vulkan opengl3)
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if(NOT IMGUI_BUILD_IMPL_${xGLP})
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continue()
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endif()
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foreach(xGRL glfw sdl3)
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if(NOT IMGUI_BUILD_IMPL_${xGRL})
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continue()
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endif()
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set(xDemoName "demo-${xGRL}-${xGLP}-${xLibType}")
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add_executable(${xDemoName}
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"${CMAKE_SOURCE_DIR}/examples/example_${xGRL}_${xGLP}/main.cpp"
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)
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target_include_directories(${xDemoName} PRIVATE
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$<BUILD_INTERFACE:${CMAKE_SOURCE_DIR}/backends>
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)
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if(IMGUI_IMPL_COMBINE_STATIC)
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target_link_libraries(${xDemoName} PRIVATE
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imgui
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)
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else()
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target_link_libraries(${xDemoName} PRIVATE
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imgui imgui-impl-${xGLP} imgui-impl-${xGRL}
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)
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endif()
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endforeach()
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endforeach()
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endif()
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