CMakeLists.txt: Add cmake config package export

Basically done the same thing as in concurrentqueue to make it
easy for cmake based project to pick up the install location / header
files.

Signed-off-by: Matthias Schoepfer <[email protected]>

Author: DasRoteSkelett

CMakeLists.txt

@@ -2,10 +2,65 @@ cmake_minimum_required(VERSION 3.9)
 project(readerwriterqueue VERSION 1.0.0)
 
 include(GNUInstallDirs)
+include(CMakePackageConfigHelpers)
 
 add_library(${PROJECT_NAME} INTERFACE)
 
-target_include_directories(readerwriterqueue INTERFACE ${CMAKE_CURRENT_SOURCE_DIR})
+target_include_directories(readerwriterqueue INTERFACE
+                                             $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}>
+                                             $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}/${PROJECT_NAME}/>
+)
 
 install(FILES atomicops.h readerwriterqueue.h readerwritercircularbuffer.h LICENSE.md
         DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/${PROJECT_NAME})
+
+install(TARGETS ${PROJECT_NAME}
+    EXPORT ${PROJECT_NAME}Targets
+)
+
+write_basic_package_version_file(
+        ${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}ConfigVersion.cmake
+    VERSION
+        ${PROJECT_VERSION}
+    COMPATIBILITY AnyNewerVersion
+)
+
+configure_package_config_file(${PROJECT_NAME}Config.cmake.in
+                ${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}Config.cmake
+        INSTALL_DESTINATION
+                ${CMAKE_INSTALL_LIBDIR}/cmake/${PROJECT_NAME}/
+)
+
+install(EXPORT
+                ${PROJECT_NAME}Targets
+        FILE
+                ${PROJECT_NAME}Targets.cmake
+        NAMESPACE
+                "${PROJECT_NAME}::"
+        DESTINATION
+                ${CMAKE_INSTALL_LIBDIR}/cmake/${PROJECT_NAME}
+        COMPONENT
+                Devel
+)
+
+install(
+        FILES
+                ${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}Config.cmake
+                ${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}ConfigVersion.cmake
+        DESTINATION
+                ${CMAKE_INSTALL_LIBDIR}/cmake/${PROJECT_NAME}
+        COMPONENT
+                Devel
+)
+
+set(CPACK_PACKAGE_NAME ${PROJECT_NAME})
+set(CPACK_PACKAGE_VENDOR "Cameron Desrochers <[email protected]>")
+set(CPACK_PACKAGE_DESCRIPTION_SUMMARY "A single-producer, single-consumer lock-free queue for C++.")
+set(CPACK_PACKAGE_VERSION "${PROJECT_VERSION}")
+set(CPACK_PACKAGE_VERSION_MAJOR "${PROJECT_VERSION_MAJOR}")
+set(CPACK_PACKAGE_VERSION_MINOR "${PROJECT_VERSION_MINOR}")
+set(CPACK_PACKAGE_VERSION_PATCH "${PROJECT_VERSION_PATCH}")
+set(CPACK_DEBIAN_PACKAGE_MAINTAINER ${CPACK_PACKAGE_VENDOR})
+set(CPACK_GENERATOR "RPM;DEB")
+
+include(CPack)

readerwriterqueueConfig.cmake.in

@@ -0,0 +1,3 @@
+@PACKAGE_INIT@
+
+include(${CMAKE_CURRENT_LIST_DIR}/@PROJECT_NAME@Targets.cmake)