cmake: create and install pkg-config file

This was one requirement in rafaelsteil#27 to make it easier for other, non CMake
projects to use libcgi.

Signed-off-by: Alexander Dahl <[email protected]>

CMakeLists.txt

@@ -16,6 +16,9 @@ set(PROJECT_VERSION_PATCH 0)
 set(PROJECT_VERSION "${PROJECT_VERSION_MAJOR}.${PROJECT_VERSION_MINOR}.${PROJECT_VERSION_PATCH}")
 message(STATUS "PROJECT_VERSION: ${PROJECT_VERSION}")
 
+set(CGI_DESCRIPTION "A C library to build CGI applications.")
+set(CGI_URL "https://github.com/rafaelsteil/libcgi")
+
 # includes
 include(CMakePackageConfigHelpers)	# cmake 2.8.8
 include(FeatureSummary)
@@ -45,6 +48,17 @@ install(FILES
 	DESTINATION "${CMAKE_INSTALL_LIBDIR}/cmake/${PROJECT_NAME}"
 )
 
+# pkg-config stuff
+configure_file(
+	"${CMAKE_CURRENT_SOURCE_DIR}/libcgi.pc.cmake.in"
+	"${CMAKE_CURRENT_BINARY_DIR}/libcgi.pc"
+	@ONLY
+)
+install(FILES
+	"${CMAKE_CURRENT_BINARY_DIR}/libcgi.pc"
+	DESTINATION "${CMAKE_INSTALL_LIBDIR}/pkgconfig"
+)
+
 # feature summary
 message(STATUS "CMAKE_BUILD_TYPE: ${CMAKE_BUILD_TYPE}")
 feature_summary(WHAT ALL)
@@ -56,7 +70,7 @@ set(CPACK_PACKAGE_VERSION_MINOR ${PROJECT_VERSION_MINOR})
 set(CPACK_PACKAGE_VERSION_PATCH ${PROJECT_VERSION_PATCH})
 set(CPACK_PACKAGE_VERSION ${PROJECT_VERSION})
 set(CPACK_PACKAGE_DESCRIPTION_FILE "${PROJECT_SOURCE_DIR}/README.md")
-set(CPACK_PACKAGE_DESCRIPTION_SUMMARY "A C library to build CGI applications.")
+set(CPACK_PACKAGE_DESCRIPTION_SUMMARY "${CGI_DESCRIPTION}")
 set(CPACK_SOURCE_PACKAGE_FILE_NAME "${CPACK_PACKAGE_NAME}-${CPACK_PACKAGE_VERSION}")
 set(CPACK_SOURCE_IGNORE_FILES "/\\\\.kdev4/;\\\\.kdev4$;/\\\\.git/;\\\\.gitignore;\\\\.swp$")
 include(CPack)

libcgi.pc.cmake.in

@@ -0,0 +1,9 @@
+libdir=@CMAKE_INSTALL_FULL_LIBDIR@
+includedir=@CMAKE_INSTALL_FULL_INCLUDEDIR@
+
+Name: libcgi
+Description: @CGI_DESCRIPTION@
+URL: @CGI_URL@
+Version: @PROJECT_VERSION@
+Libs: -L${libdir} -lcgi
+Cflags: -I${includedir}