- seems some OpenGL related stuff got lost during merge. Reinstated checks for OpenGL itself but since GLU is no longer needed it was removed for good from the project files.

src/CMakeLists.txt

@@ -213,6 +213,18 @@ else( WIN32 )
 	endif( FPU_CONTROL_DIR )
 endif( WIN32 )
 
+if( X64 )
+	set( NO_ASM ON )
+endif( X64 )
+
+# Check if we have OpenGL
+
+if( NOT OPENGL_FOUND )
+	message( FATAL_ERROR "OpenGL is required for building." )
+endif( NOT OPENGL_FOUND )
+
+set( ZDOOM_LIBS ${ZDOOM_LIBS} ${OPENGL_LIBRARIES} )
+include_directories( ${OPENGL_INCLUDE_DIR} )
 
 if( NOT NO_OPENAL )
     find_package( OpenAL )