Possibly fixed the issues with LibGME mentioned in issue #14.

Not even the HAVE_LIBGME macro was defined apparently, huh.

cmake/Modules/FindGME.cmake

@@ -6,16 +6,16 @@ find_path(GME_INCLUDE_DIR
 	NAMES gme.h
 	PATHS
 		${GME_PKGCONF_INCLUDE_DIRS}
-		/usr/include/gme
-		/usr/local/include/gme
+		"/usr/include/gme"
+		"/usr/local/include/gme"
 )
 
 find_library(GME_LIBRARY
 	NAMES gme
 	PATHS
 		${GME_PKGCONF_LIBRARY_DIRS}
-		/usr/lib
-		/usr/local/lib
+		"/usr/lib"
+		"/usr/local/lib"
 )
 
 set(GME_PROCESS_INCLUDES GME_INCLUDE_DIR)

src/CMakeLists.txt

@@ -314,6 +314,7 @@ if(${SRB2_CONFIG_HAVE_GME})
 	find_package(GME)
 	if(${GME_FOUND})
 		set(SRB2_HAVE_GME ON)
+		add_definitions(-DHAVE_LIBGME)
 	else()
 		message(WARNING "You have specified that GME is available but it was not found.")
 	endif()

src/sdl/CMakeLists.txt

@@ -122,6 +122,7 @@ if(${SDL2_FOUND})
 		add_framework(SDL2 SRB2SDL2)
 		add_framework(SDL2_mixer SRB2SDL2)
 		target_link_libraries(SRB2SDL2 PRIVATE
+			${GME_LIBRARIES}
 			${PNG_LIBRARIES}
 			${ZLIB_LIBRARIES}
 			${OPENGL_LIBRARIES}
@@ -131,6 +132,7 @@ if(${SDL2_FOUND})
 		target_link_libraries(SRB2SDL2 PRIVATE
 			${SDL2_LIBRARIES}
 			${SDL2_MIXER_LIBRARIES}
+			${GME_LIBRARIES}
 			${PNG_LIBRARIES}
 			${ZLIB_LIBRARIES}
 			${OPENGL_LIBRARIES}
@@ -198,6 +200,7 @@ if(${SDL2_FOUND})
 	target_include_directories(SRB2SDL2 PRIVATE
 		${SDL2_INCLUDE_DIRS}
 		${SDL2_MIXER_INCLUDE_DIRS}
+		${GME_INCLUDE_DIRS}
 		${PNG_INCLUDE_DIRS}
 		${ZLIB_INCLUDE_DIRS}
 		${OPENGL_INCLUDE_DIRS}