dont include the preview.blend in headless mode

source/blender/editors/datafiles/CMakeLists.txt

@@ -37,13 +37,16 @@ if(WITH_BLENDER)
 	# blender only
 	list(APPEND SRC
 		startup.blend.c
-		preview.blend.c
 		bmonofont.ttf.c
 	)
 
 	if(NOT WITH_HEADLESS)
 		# blender UI only
 		list(APPEND SRC
+			# blends
+			preview.blend.c
+
+			# images
 			splash.png.c
 			blenderbuttons.c
 

source/blender/editors/render/CMakeLists.txt

@@ -60,4 +60,8 @@ if(WITH_OPENMP)
 	add_definitions(-DPARALLEL=1)
 endif()
 
+if(WITH_HEADLESS)
+	add_definitions(-DWITH_HEADLESS)
+endif()
+
 blender_add_lib(bf_editor_render "${SRC}" "${INC}" "${INC_SYS}")

source/blender/editors/render/render_preview.c

@@ -171,6 +171,7 @@ static Main *pr_main= NULL;
 
 void ED_preview_init_dbase(void)
 {
+#ifndef WITH_HEADLESS
 	BlendFileData *bfd;
 	extern int datatoc_preview_blend_size;
 	extern char datatoc_preview_blend[];
@@ -184,6 +185,7 @@ void ED_preview_init_dbase(void)
 		MEM_freeN(bfd);
 	}
 	G.fileflags= fileflags;
+#endif
 }
 
 void ED_preview_free_dbase(void)