function(get_relative_link REL PATH)
	get_filename_component(NAME ${PATH} NAME_WE)
	if(${NAME} MATCHES "^lib")
		string(REGEX REPLACE "^lib" "-l" LINK ${NAME})
	elseif(${NAME} MATCHES "^-")
		set(LINK ${NAME})
	else()
		string(CONCAT LINK "-l" ${NAME})
	endif()
	set(${REL} ${LINK} PARENT_SCOPE)
endfunction()

function(generate_pkgconfig TARGET DESCRIPTION)
	message("generating pkg-config for ${TARGET}")
	get_filename_component(PREFIX ${CMAKE_INSTALL_PREFIX} ABSOLUTE)

	get_target_property(LIST ${TARGET} LINK_LIBRARIES)
	set(REQS "")
	set(LIBS "")
	foreach(LIB ${LIST})
		if(TARGET ${LIB})
			set(HAS_REQS 1)
			list(APPEND REQS ${LIB})
		else()
			set(HAS_LIBS 1)
			get_relative_link(LINK ${LIB})
			list(APPEND LIBS ${LINK})
		endif()
	endforeach()

	if(HAS_REQS)
		set(REQUIRES "\nRequires.private:")
		foreach (REQ ${REQS})
			string(APPEND REQUIRES " ${REQ}")
		endforeach()
	endif()
	if(HAS_LIBS)
		set(LIBRARIES "\nLibs.private:")
		foreach (LIB ${LIBS})
			string(APPEND LIBRARIES " ${LIB}")
		endforeach()
	endif()

	file(GENERATE OUTPUT "${CMAKE_CURRENT_BINARY_DIR}/pkgconfig/${TARGET}.pc" CONTENT 
"prefix=${PREFIX}
includedir=\${prefix}/include
libdir=\${prefix}/lib

Name: ${TARGET}
Description: ${DESCRIPTION}
Version: ${PROJECT_VERSION}

CFlags: -I\${includedir}
Libs: -L\${libdir} -l${TARGET}${REQUIRES}${LIBRARIES}")

	install(FILES "pkgconfig/${TARGET}.pc" DESTINATION "${CMAKE_INSTALL_PREFIX}/lib/pkgconfig")
endfunction()