Added packaging using CPack and pkg-config.

Fixed installation dir of configs - it must be arch-independent for a header-only library.

CMakeLists.txt

@@ -1,6 +1,8 @@
 cmake_minimum_required(VERSION 3.1)
 
-project(argh)
+project(argh VERSION 1.3.1)
+set(PROJECT_DESCRIPTION "A minimalist argument handler.")
+set(PROJECT_HOMEPAGE_URL "https://github.com/adishavit/argh")
 
 set(CMAKE_CXX_STANDARD 11)
 
@@ -35,20 +37,54 @@ add_library(argh INTERFACE)
 target_include_directories(argh INTERFACE $<BUILD_INTERFACE:${CMAKE_CURRENT_LIST_DIR}> $<INSTALL_INTERFACE:include>)
 
 if(ARGH_MASTER_PROJECT)
-	install(TARGETS argh EXPORT arghTargets)
+	install(TARGETS argh EXPORT argh)
 
 	include(GNUInstallDirs)
+	string(REPLACE "/${CMAKE_LIBRARY_ARCHITECTURE}" "" CMAKE_INSTALL_LIBDIR_ARCHIND "${CMAKE_INSTALL_LIBDIR}")
 	install(FILES "${CMAKE_CURRENT_LIST_DIR}/argh.h" DESTINATION ${CMAKE_INSTALL_INCLUDEDIR})
 	install(FILES "${CMAKE_CURRENT_LIST_DIR}/LICENSE" DESTINATION ${CMAKE_INSTALL_DOCDIR})
 	install(FILES "${CMAKE_CURRENT_LIST_DIR}/README.md" DESTINATION ${CMAKE_INSTALL_DOCDIR})
+	set(PackagingTemplatesDir "${CMAKE_CURRENT_LIST_DIR}/packaging")
 
 	if(CMAKE_SYSTEM_NAME STREQUAL Linux)
 	# this might be a bit too restrictive, since for other (BSD, ...) this might apply also
 	# but this can be fixed later in extra pull requests from people on the platform
-		install(FILES argh-config.cmake DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/argh)
-		install(EXPORT arghTargets DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/argh)
+		install(FILES "${PackagingTemplatesDir}/argh-config.cmake" DESTINATION ${CMAKE_INSTALL_LIBDIR_ARCHIND}/cmake/argh)
+		install(EXPORT argh DESTINATION ${CMAKE_INSTALL_LIBDIR_ARCHIND}/cmake/argh)
 	else()
-		install(FILES argh-config.cmake DESTINATION CMake)
-		install(EXPORT arghTargets DESTINATION CMake)
+		install(FILES "${PackagingTemplatesDir}/argh-config.cmake" DESTINATION CMake)
+		install(EXPORT argh DESTINATION CMake)
 	endif()
+
+	set(CPACK_PACKAGE_NAME "${PROJECT_NAME}")
+	set(CPACK_PACKAGE_VENDOR "Argh developers")
+	set(CPACK_PACKAGE_DESCRIPTION "${PROJECT_DESCRIPTION}")
+	set(CPACK_DEBIAN_PACKAGE_NAME "${CPACK_PACKAGE_NAME}")
+	set(CPACK_RPM_PACKAGE_NAME "${CPACK_PACKAGE_NAME}")
+	set(CPACK_PACKAGE_HOMEPAGE_URL "${PROJECT_HOMEPAGE_URL}")
+	set(CPACK_PACKAGE_MAINTAINER "${CPACK_PACKAGE_VENDOR}")
+	set(CPACK_DEBIAN_PACKAGE_MAINTAINER "${CPACK_PACKAGE_MAINTAINER}")
+	set(CPACK_RESOURCE_FILE_LICENSE "${CMAKE_CURRENT_SOURCE_DIR}/LICENSE")
+	set(CPACK_RESOURCE_FILE_README "${CMAKE_CURRENT_SOURCE_DIR}/README.md")
+
+	set(CPACK_DEBIAN_PACKAGE_NAME "lib${PROJECT_NAME}-dev")
+	set(CPACK_DEBIAN_PACKAGE_DEPENDS "libc6-dev")
+	set(CPACK_DEBIAN_PACKAGE_SUGGESTS "cmake, pkg-config, pkg-conf")
+
+	set(CPACK_RPM_PACKAGE_NAME "lib${PROJECT_NAME}-devel")
+	set(CPACK_RPM_PACKAGE_SUGGESTS "${CPACK_DEBIAN_PACKAGE_SUGGESTS}")
+
+	set(CPACK_DEB_COMPONENT_INSTALL ON)
+	set(CPACK_RPM_COMPONENT_INSTALL ON)
+	set(CPACK_NSIS_COMPONENT_INSTALL ON)
+	set(CPACK_DEBIAN_COMPRESSION_TYPE "xz")
+
+	set(PKG_CONFIG_FILE_NAME "${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}.pc")
+	message(STATUS "PROJECT_DESCRIPTION ${PROJECT_DESCRIPTION}")
+	configure_file("${PackagingTemplatesDir}/pkgconfig.pc.in" "${PKG_CONFIG_FILE_NAME}" @ONLY)
+	install(FILES "${PKG_CONFIG_FILE_NAME}"
+		DESTINATION "${CMAKE_INSTALL_LIBDIR_ARCHIND}/pkgconfig"
+	)
+
+	include(CPack)
 endif()

packaging/pkgconfig.pc.in

@@ -0,0 +1,7 @@
+prefix=@CMAKE_INSTALL_PREFIX@
+includedir=${prefix}/@CMAKE_INSTALL_INCLUDEDIR@
+
+Name: @PROJECT_NAME@
+Description: @PROJECT_DESCRIPTION@
+Version: @PROJECT_VERSION@
+Cflags: -I${includedir}