[stdlib] Use GNUInstallDirs in CMakeLists.txt

Source: #669

CMakeLists.txt

@@ -9,6 +9,7 @@ include(CheckIncludeFile)
 include(FindPkgConfig)
 include(ExternalProject)
 include(FindBacktrace)
+include(GNUInstallDirs)
 
 # -D_DARWIN_C_SOURCE - SIGWINCH and friends on MacOS
 # -D_XOPEN_SOURCE - strptime on Linux
@@ -127,19 +128,19 @@ target_link_libraries(ngs m Threads::Threads ${CMAKE_DL_LIBS} ${LIBGC_LIBRARIES}
 add_custom_target(man ALL WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/doc COMMAND make man DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/doc/*.1.md)
 
 
-install(FILES "${PROJECT_BINARY_DIR}/ngs" DESTINATION bin)
-install(PROGRAMS ${CMAKE_CURRENT_BINARY_DIR}/ngs DESTINATION bin)
-install(DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/lib/ DESTINATION lib/ngs)
+install(FILES "${PROJECT_BINARY_DIR}/ngs" DESTINATION ${CMAKE_INSTALL_BINDIR})
+install(PROGRAMS ${CMAKE_CURRENT_BINARY_DIR}/ngs DESTINATION ${CMAKE_INSTALL_BINDIR})
+install(DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/lib/ DESTINATION ${CMAKE_INSTALL_LIBDIR}/ngs)
 
 if(INSTALL_EXAMPLE_SCRIPTS)
 	install(
 		DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/bin/
-		DESTINATION bin FILES_MATCHING PATTERN "*.ngs"
+		DESTINATION ${CMAKE_INSTALL_BINDIR} FILES_MATCHING PATTERN "*.ngs"
 		PERMISSIONS OWNER_READ OWNER_WRITE OWNER_EXECUTE GROUP_READ GROUP_WRITE GROUP_EXECUTE WORLD_READ WORLD_WRITE WORLD_EXECUTE
 	)
 endif()
-install(FILES ${CMAKE_CURRENT_SOURCE_DIR}/LICENSE DESTINATION share/doc/ngs)
-install(DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/doc/ DESTINATION share/man/man1 FILES_MATCHING PATTERN "*.1")
+install(FILES ${CMAKE_CURRENT_SOURCE_DIR}/LICENSE DESTINATION ${CMAKE_INSTALL_DOCDIR})
+install(DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/doc/ DESTINATION ${CMAKE_INSTALL_MANDIR}/man1 FILES_MATCHING PATTERN "*.1")
 
 enable_testing()
 add_test(all bash -c "${CMAKE_CURRENT_BINARY_DIR}/ngs ${CMAKE_CURRENT_SOURCE_DIR}/test.ngs")