Make component available for CMake's find_package()

This PR adds cmake code to generate `sqlite3mcConfig.cmake`, `sqlite3mcConfigVersion.cmake`, `sqlite3mcTargets.cmake`. CMake's `find_package()` can be used to compile other projects with this library.

Author: utelle

CMakeLists.txt

@@ -1,5 +1,5 @@
 cmake_minimum_required(VERSION 3.24.0.0)
-project(sqlite3mc)
+project(sqlite3mc VERSION 2.1.1)
 
 # Helper macro
 macro(_Enable_MT _target)
@@ -300,10 +300,19 @@ else()
 endif()
 
 # Lib Project
-add_library(${SQLITE3MC_TARGET} ${SQLITE3MC_LINK}
-  ${SQLITE3MC_BASE_SRCS}
+add_library(${SQLITE3MC_TARGET} ${SQLITE3MC_LINK})
+add_library(${PROJECT_NAME}::${SQLITE3MC_TARGET} ALIAS ${SQLITE3MC_TARGET})
+
+target_sources(${SQLITE3MC_TARGET}
+  PRIVATE
+    ${SQLITE3MC_BASE_SRCS}
+
+  PUBLIC
+    FILE_SET HEADERS
+    BASE_DIRS src
+    FILES ${SQLITE3MC_PUBLIC_HEADERS}
 )
-target_include_directories(${SQLITE3MC_TARGET} PUBLIC
+target_include_directories(${SQLITE3MC_TARGET} PRIVATE
   ${SQLITE3MC_INCLUDEDIRS}
 )
 target_compile_definitions(${SQLITE3MC_TARGET} PRIVATE
@@ -337,7 +346,7 @@ if(SQLITE3MC_WITH_ICU)
   target_compile_definitions(${SQLITE3MC_TARGET} PRIVATE
     ${SQLITE3MC_ICU_DEFINITIONS}
   )
-  target_include_directories(${SQLITE3MC_TARGET} PRIVATE 
+  target_include_directories(${SQLITE3MC_TARGET} PRIVATE
     ${ICU_INCLUDE_DIRS}
   )
   target_link_libraries(${SQLITE3MC_TARGET} PRIVATE
@@ -352,12 +361,35 @@ if(SQLITE3MC_STATIC_RUNTIME_LINK)
 endif()
 message("Will build ${SQLITE3MC_TARGET} as ${SQLITE3MC_LINK}")
 
-set_target_properties(${SQLITE3MC_TARGET} PROPERTIES PUBLIC_HEADER "${SQLITE3MC_PUBLIC_HEADERS}")
+include(GNUInstallDirs)
 INSTALL(TARGETS ${SQLITE3MC_TARGET}
-  ARCHIVE DESTINATION lib
-  LIBRARY DESTINATION lib
-  PUBLIC_HEADER DESTINATION include/${PROJECT_NAME}
-  RUNTIME DESTINATION bin
+  EXPORT ${SQLITE3MC_TARGET}Targets
+  ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
+  LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
+  RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
+  FILE_SET HEADERS DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/${PROJECT_NAME}
+  COMPONENT libraries
+)
+
+install(EXPORT ${SQLITE3MC_TARGET}Targets DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/${SQLITE3MC_TARGET})
+
+# Create config for find_package()
+include(CMakePackageConfigHelpers)
+write_basic_package_version_file(${CMAKE_CURRENT_BINARY_DIR}/${SQLITE3MC_TARGET}ConfigVersion.cmake COMPATIBILITY SameMajorVersion)
+set(SQLITE3MC_CONFIG_CONTENT "@PACKAGE_INIT@\n")
+string(APPEND SQLITE3MC_CONFIG_CONTENT "include(\"\${CMAKE_CURRENT_LIST_DIR}/${SQLITE3MC_TARGET}Targets.cmake\")")
+file(WRITE ${CMAKE_CURRENT_BINARY_DIR}/${SQLITE3MC_TARGET}Config.cmake.in ${SQLITE3MC_CONFIG_CONTENT})
+
+configure_package_config_file(
+  ${CMAKE_CURRENT_BINARY_DIR}/${SQLITE3MC_TARGET}Config.cmake.in
+  ${SQLITE3MC_TARGET}Config.cmake
+  INSTALL_DESTINATION "${CMAKE_INSTALL_LIBDIR}/cmake/${SQLITE3MC_TARGET}"
+)
+
+install(FILES
+  ${CMAKE_CURRENT_BINARY_DIR}/${SQLITE3MC_TARGET}ConfigVersion.cmake
+  ${CMAKE_CURRENT_BINARY_DIR}/${SQLITE3MC_TARGET}Config.cmake
+  DESTINATION "${CMAKE_INSTALL_LIBDIR}/cmake/${SQLITE3MC_TARGET}"
 )
 
 # Shell Executable project
@@ -390,7 +422,7 @@ if(SQLITE3MC_BUILD_SHELL)
     target_compile_definitions(${SQLITE3MC_SHELL_TARGET} PRIVATE
       ${SQLITE3MC_ICU_DEFINITIONS}
     )
-    target_include_directories(${SQLITE3MC_SHELL_TARGET} PRIVATE 
+    target_include_directories(${SQLITE3MC_SHELL_TARGET} PRIVATE
       ${ICU_INCLUDE_DIRS}
     )
     target_link_libraries(${SQLITE3MC_SHELL_TARGET} PRIVATE
@@ -401,14 +433,13 @@ if(SQLITE3MC_BUILD_SHELL)
 
   if(SQLITE3MC_RUNTIME_LINK)
     message("Will build ${SQLITE3MC_SHELL_TARGET} with static runtime")
-    _Enable_MT(${SQLIT3MC_SHELL_TARGET})
+    _Enable_MT(${SQLITE3MC_SHELL_TARGET})
   endif()
   message("Will build ${SQLITE3MC_SHELL_TARGET}")
 
   INSTALL(TARGETS ${SQLITE3MC_SHELL_TARGET}
-    ARCHIVE DESTINATION lib
-    LIBRARY DESTINATION lib
-    PUBLIC_HEADER DESTINATION include/${PROJECT_NAME}
-    RUNTIME DESTINATION bin
+    ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
+    LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
+    RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
   )
 endif()