Explicitly link to GObject (should fix #3840)

CMakeLists.txt

@@ -564,6 +564,7 @@ if(ENABLE_GAME OR ENABLE_TESTS)
 	if(NOT MSVC)
 		find_package(VorbisFile REQUIRED)
 		find_package( PkgConfig REQUIRED )
+		pkg_check_modules( GOBJECT REQUIRED gobject-2.0 )
 		pkg_check_modules( PANGOCAIRO REQUIRED pangocairo>=1.21.3 )
 		pkg_check_modules( FONTCONFIG REQUIRED fontconfig>=2.4.1 )
         pkg_check_modules( SYSTEMD systemd )

SConstruct

@@ -367,6 +367,7 @@ if env["prereqs"]:
     conf = client_env.Configure(**configure_args)
     have_client_prereqs = have_server_prereqs and \
         CheckAsio(conf) and \
+        conf.CheckPKG("gobject-2.0") and \
         conf.CheckPango("cairo", require_version = "1.21.3") and \
         conf.CheckPKG("fontconfig") and \
         conf.CheckBoost("program_options", require_version="1.35.0") and \

src/CMakeLists.txt

@@ -104,6 +104,7 @@ set(game-external-libs
 	${SDLMIXER_LIBRARY}
 	${ANA_LIBRARIES}
 	${SDLTTF_LIBRARY}
+	${GOBJECT_LIBRARIES}
 	${PANGOCAIRO_LIBRARIES}
 	${FONTCONFIG_LIBRARIES}
 	${LIBDBUS_LIBRARIES}