Implement generating cmake package config files.

Author: giladreich

CMakeLists.txt

@@ -1208,6 +1208,44 @@ if(INSTALL_PKG_CONFIG_FILES)
     endforeach(versuffix)
 endif(INSTALL_PKG_CONFIG_FILES)
 
+# Generate CMake package-config files
+include(CMakePackageConfigHelpers)
+
+set(PKG_NAME "Allegro")
+string(TOLOWER ${PKG_NAME} PKG_NAME_LOWER)
+
+set(PKG_CONFIG_INSTALL_DIR "lib/cmake/${PKG_NAME_LOWER}")
+set(PKG_GENERATED_DIR "${CMAKE_CURRENT_BINARY_DIR}/generated")
+set(PKG_TARGETS_NAME "${PKG_NAME}Targets")
+set(PKG_CONFIG_FILE "${PKG_GENERATED_DIR}/${PKG_NAME}Config.cmake")
+set(PKG_VERSION_FILE "${PKG_GENERATED_DIR}/${PKG_NAME}ConfigVersion.cmake")
+
+configure_package_config_file(
+  "${CMAKE_CURRENT_LIST_DIR}/cmake/${PKG_NAME}Config.cmake.in"
+  ${PKG_CONFIG_FILE}
+  INSTALL_DESTINATION ${PKG_CONFIG_INSTALL_DIR}
+  NO_SET_AND_CHECK_MACRO
+  NO_CHECK_REQUIRED_COMPONENTS_MACRO
+)
+write_basic_package_version_file(${PKG_VERSION_FILE}
+  VERSION ${ALLEGRO_VERSION}
+  COMPATIBILITY AnyNewerVersion
+)
+install(
+  TARGETS ${ALLEGRO_TARGETS}
+  EXPORT ${PKG_TARGETS_NAME}
+)
+install(
+  EXPORT ${PKG_TARGETS_NAME}
+  NAMESPACE ${PKG_NAME}::
+  DESTINATION ${PKG_CONFIG_INSTALL_DIR}
+)
+install(
+  FILES ${PKG_CONFIG_FILE} ${PKG_VERSION_FILE}
+  DESTINATION ${PKG_CONFIG_INSTALL_DIR}
+)
+
+
 #-----------------------------------------------------------------------------#
 #
 #   Documentation

cmake/AllegroConfig.cmake.in

@@ -0,0 +1,24 @@
+#
+# Allegro Package Config
+#
+@PACKAGE_INIT@
+
+set(ALLEGRO_PKG_BUGREPORT "@PROJECT_HOMEPAGE_URL@/issues")
+
+# Allegro Targets
+set(ALLEGRO_PKG_TARGETS "@ALLEGRO_TARGETS@")
+
+# Allegro Package Version
+set(ALLEGRO_PKG_VERSION_MAJOR @PROJECT_VERSION_MAJOR@)
+set(ALLEGRO_PKG_VERSION_MINOR @PROJECT_VERSION_MINOR@)
+set(ALLEGRO_PKG_VERSION_PATCH @PROJECT_VERSION_PATCH@)
+set(ALLEGRO_PKG_VERSION @PROJECT_VERSION@)
+
+# Architecture, compiler and other low level flags
+set(ALLEGRO_PKG_LIBRARY_ARCHITECTURE "@CMAKE_LIBRARY_ARCHITECTURE@")
+set(ALLEGRO_PKG_COMPILER "@CMAKE_C_COMPILER_ID@")
+set(ALLEGRO_PKG_COMPILER_VERSION "@CMAKE_C_COMPILER_VERSION@")
+set(ALLEGRO_PKG_HOST_SYSTEM "@CMAKE_HOST_SYSTEM@")
+
+# Targets
+include("${CMAKE_CURRENT_LIST_DIR}/@[email protected]")

cmake/Common.cmake

@@ -85,6 +85,10 @@ endfunction(sanitize_cmake_link_flags)
 function(add_our_library target framework_name sources extra_flags link_with)
     # BUILD_SHARED_LIBS controls whether this is a shared or static library.
     add_library(${target} ${sources})
+    target_include_directories(${target} INTERFACE $<INSTALL_INTERFACE:include>)
+    list(APPEND ALLEGRO_TARGETS "${target}")
+    list(REMOVE_DUPLICATES ALLEGRO_TARGETS)
+    set(ALLEGRO_TARGETS "${ALLEGRO_TARGETS}" CACHE STRING "Available allegro libraries" FORCE)
 
     if(MSVC)
         # Compile with multiple processors