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Add CMake Find modules for OpenAL and GLFW3 with FetchContent fallback
Create FindOpenAL.cmake and Findglfw3.cmake modules that support multiple detection methods: CONFIG mode first, then standard find_path/find_library, and finally FetchContent as fallback. Both modules create standardized imported targets (OpenAL::OpenAL and glfw) and set appropriate include directories and library variables.
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‎attachments/simple_engine/CMake/FindOpenAL.cmake‎

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# FindOpenAL.cmake
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#
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# Finds the OpenAL library
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#
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# This will define the following variables:
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#
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# OpenAL_FOUND
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# OPENAL_INCLUDE_DIR
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# OPENAL_LIBRARY
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#
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# and the following imported targets:
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#
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# OpenAL::OpenAL
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#
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# Try to find OpenAL using CONFIG mode first
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find_package(OpenAL CONFIG QUIET)
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if (OpenAL_FOUND)
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if (NOT TARGET OpenAL::OpenAL)
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if (TARGET OpenAL)
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add_library(OpenAL::OpenAL ALIAS OpenAL)
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endif ()
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endif ()
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# Set variables for find_package_handle_standard_args
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if (NOT OPENAL_INCLUDE_DIR)
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get_target_property(OPENAL_INCLUDE_DIR OpenAL::OpenAL INTERFACE_INCLUDE_DIRECTORIES)
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endif ()
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if (NOT OPENAL_LIBRARY)
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set(OPENAL_LIBRARY OpenAL)
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endif ()
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endif ()
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if (NOT OpenAL_FOUND)
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# Try to find using standard find_path/find_library
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find_path(OPENAL_INCLUDE_DIR NAMES AL/al.h OpenAL/al.h)
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find_library(OPENAL_LIBRARY NAMES OpenAL al openal OpenAL32)
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if (OPENAL_INCLUDE_DIR AND OPENAL_LIBRARY)
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set(OpenAL_FOUND TRUE)
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if (NOT TARGET OpenAL::OpenAL)
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add_library(OpenAL::OpenAL UNKNOWN IMPORTED)
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set_target_properties(OpenAL::OpenAL PROPERTIES
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IMPORTED_LOCATION "${OPENAL_LIBRARY}"
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INTERFACE_INCLUDE_DIRECTORIES "${OPENAL_INCLUDE_DIR}"
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)
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endif ()
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endif ()
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endif ()
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if (NOT OpenAL_FOUND)
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# If not found, use FetchContent to download and build openal-soft
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include(FetchContent)
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message(STATUS "OpenAL not found, fetching openal-soft from GitHub...")
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FetchContent_Declare(
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openal-soft
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GIT_REPOSITORY https://github.com/kcat/openal-soft.git
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GIT_TAG 1.23.1
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)
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# Set options to minimize OpenAL build
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set(ALSOFT_EXAMPLES OFF CACHE BOOL "" FORCE)
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set(ALSOFT_TESTS OFF CACHE BOOL "" FORCE)
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set(ALSOFT_UTILS OFF CACHE BOOL "" FORCE)
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set(ALSOFT_NO_CONFIG_UTIL ON CACHE BOOL "" FORCE)
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set(ALSOFT_INSTALL OFF CACHE BOOL "" FORCE)
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FetchContent_MakeAvailable(openal-soft)
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# openal-soft defines a target named 'OpenAL'
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if (TARGET OpenAL)
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set(OpenAL_FOUND TRUE)
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if (NOT TARGET OpenAL::OpenAL)
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add_library(OpenAL::OpenAL ALIAS OpenAL)
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endif ()
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# Satisfy find_package_handle_standard_args
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FetchContent_GetProperties(openal-soft SOURCE_DIR openal_SOURCE_DIR)
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set(OPENAL_INCLUDE_DIR "${openal_SOURCE_DIR}/include")
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set(OPENAL_LIBRARY OpenAL)
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endif ()
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endif ()
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include(FindPackageHandleStandardArgs)
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find_package_handle_standard_args(OpenAL
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REQUIRED_VARS OPENAL_INCLUDE_DIR OPENAL_LIBRARY
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)

‎attachments/simple_engine/CMake/Findglfw3.cmake‎

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# Findglfw3.cmake
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#
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# Finds the GLFW3 library
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#
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# This will define the following variables:
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#
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# glfw3_FOUND
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# GLFW3_INCLUDE_DIR
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# GLFW3_LIBRARY
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#
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# and the following imported targets:
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#
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# glfw
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#
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# Try to find GLFW3 using CONFIG mode first (common for vcpkg)
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find_package(glfw3 CONFIG QUIET)
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if (glfw3_FOUND)
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if (NOT TARGET glfw)
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if (TARGET glfw3::glfw)
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add_library(glfw ALIAS glfw3::glfw)
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endif ()
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endif ()
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# Set variables for find_package_handle_standard_args
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if (NOT GLFW3_INCLUDE_DIR)
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get_target_property(GLFW3_INCLUDE_DIR glfw INTERFACE_INCLUDE_DIRECTORIES)
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endif ()
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if (NOT GLFW3_LIBRARY)
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set(GLFW3_LIBRARY glfw)
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endif ()
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endif ()
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if (NOT glfw3_FOUND)
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# Try to find using standard find_path/find_library
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find_path(GLFW3_INCLUDE_DIR NAMES GLFW/glfw3.h)
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find_library(GLFW3_LIBRARY NAMES glfw glfw3)
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if (GLFW3_INCLUDE_DIR AND GLFW3_LIBRARY)
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set(glfw3_FOUND TRUE)
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if (NOT TARGET glfw)
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add_library(glfw UNKNOWN IMPORTED)
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set_target_properties(glfw PROPERTIES
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IMPORTED_LOCATION "${GLFW3_LIBRARY}"
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INTERFACE_INCLUDE_DIRECTORIES "${GLFW3_INCLUDE_DIR}"
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)
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endif ()
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endif ()
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endif ()
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if (NOT glfw3_FOUND)
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# If not found, use FetchContent to download and build
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include(FetchContent)
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message(STATUS "glfw3 not found, fetching from GitHub...")
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FetchContent_Declare(
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glfw
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GIT_REPOSITORY https://github.com/glfw/glfw.git
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GIT_TAG 3.4
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)
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# Set options to minimize GLFW build
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set(GLFW_BUILD_EXAMPLES OFF CACHE BOOL "" FORCE)
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set(GLFW_BUILD_TESTS OFF CACHE BOOL "" FORCE)
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set(GLFW_BUILD_DOCS OFF CACHE BOOL "" FORCE)
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set(GLFW_INSTALL OFF CACHE BOOL "" FORCE)
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FetchContent_MakeAvailable(glfw)
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# GLFW's CMakeLists.txt defines a target named 'glfw'
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if (TARGET glfw)
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set(glfw3_FOUND TRUE)
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# Satisfy find_package_handle_standard_args
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FetchContent_GetProperties(glfw SOURCE_DIR glfw_SOURCE_DIR)
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set(GLFW3_INCLUDE_DIR "${glfw_SOURCE_DIR}/include")
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set(GLFW3_LIBRARY glfw)
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endif ()
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endif ()
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include(FindPackageHandleStandardArgs)
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find_package_handle_standard_args(glfw3
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REQUIRED_VARS GLFW3_INCLUDE_DIR GLFW3_LIBRARY
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)

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