compile without splash and icons when WITH_HEADLESS is set.

source/blender/editors/datafiles/CMakeLists.txt

@@ -29,12 +29,21 @@ set(INC_SYS
 
 set(SRC
 	Bfont.c
-	add.png.c
 	bfont.ttf.c
+	bmonofont.ttf.c
+	startup.blend.c
+	preview.blend.c
+)
+
+if(NOT WITH_HEADLESS)
+	list(APPEND SRC
+		splash.png.c
 		blenderbuttons.c
+
+		# brushes
+		add.png.c
 		blob.png.c
 		blur.png.c
-	bmonofont.ttf.c
 		clay.png.c
 		clone.png.c
 		crease.png.c
@@ -50,20 +59,18 @@ set(SRC
 		multiply.png.c
 		nudge.png.c
 		pinch.png.c
-	preview.blend.c
 		prvicons.c
 		scrape.png.c
 		smear.png.c
 		smooth.png.c
 		snake_hook.png.c
 		soften.png.c
-	splash.png.c
-	startup.blend.c
 		subtract.png.c
 		texdraw.png.c
 		thumb.png.c
 		twist.png.c
 		vertexdraw.png.c
 	)
+endif()
 
 blender_add_lib(bf_editor_datafiles "${SRC}" "${INC}" "${INC_SYS}")

source/blender/editors/interface/CMakeLists.txt

@@ -63,6 +63,10 @@ if(WITH_INTERNATIONAL)
 	add_definitions(-DINTERNATIONAL)
 endif()
 
+if(WITH_HEADLESS)
+	add_definitions(-DWITH_HEADLESS)
+endif()
+
 if(WITH_PYTHON)
 	add_definitions(-DWITH_PYTHON)
 endif()

source/blender/editors/interface/interface_draw.c

@@ -471,6 +471,9 @@ void uiEmboss(float x1, float y1, float x2, float y2, int sel)
 
 void ui_draw_but_IMAGE(ARegion *UNUSED(ar), uiBut *UNUSED(but), uiWidgetColors *UNUSED(wcol), rcti *rect)
 {
+#ifdef WITH_HEADLESS
+	(void)rect;
+#else
 	extern char datatoc_splash_png[];
 	extern int datatoc_splash_png_size;
 	ImBuf *ibuf;
@@ -507,6 +510,7 @@ void ui_draw_but_IMAGE(ARegion *UNUSED(ar), uiBut *UNUSED(but), uiWidgetColors *
 	*/
 	
 	IMB_freeImBuf(ibuf);
+#endif
 }
 
 #if 0

source/blender/editors/interface/interface_icons.c

@@ -461,6 +461,7 @@ static void vicon_move_down_draw(int x, int y, int w, int h, float UNUSED(alpha)
 	glDisable(GL_LINE_SMOOTH);
 }
 
+#ifndef WITH_HEADLESS
 static void init_brush_icons(void)
 {
 
@@ -588,7 +589,7 @@ static void init_internal_icons(void)
 
 	IMB_freeImBuf(bbuf);
 }
-
+#endif // WITH_HEADLESS
 
 static void init_iconfile_list(struct ListBase *list)
 {
@@ -704,6 +705,7 @@ ListBase *UI_iconfile_list(void)
 
 void UI_icons_free(void)
 {
+#ifndef WITH_HEADLESS
 	if(icongltex.id) {
 		glDeleteTextures(1, &icongltex.id);
 		icongltex.id= 0;
@@ -711,6 +713,7 @@ void UI_icons_free(void)
 
 	free_iconfile_list(&iconfilelist);
 	BKE_icons_free();
+#endif
 }
 
 void UI_icons_free_drawinfo(void *drawinfo)
@@ -792,10 +795,14 @@ int UI_icon_get_height(int icon_id)
 
 void UI_icons_init(int first_dyn_id)
 {
+#ifdef WITH_HEADLESS
+	(void)first_dyn_id;
+#else
 	init_iconfile_list(&iconfilelist);
 	BKE_icons_init(first_dyn_id);
 	init_internal_icons();
 	init_brush_icons();
+#endif
 }
 
 /* Render size for preview images and icons

source/blender/editors/space_file/CMakeLists.txt

@@ -51,6 +51,10 @@ set(SRC
 	fsmenu.h
 )
 
+if(WITH_HEADLESS)
+	add_definitions(-DWITH_HEADLESS)
+endif()
+
 if(WITH_IMAGE_OPENEXR)
 	add_definitions(-DWITH_OPENEXR)
 endif()

source/blender/editors/space_file/filelist.c

@@ -373,7 +373,11 @@ void filelist_init_icons(void)
 	short x, y, k;
 	ImBuf *bbuf;
 	ImBuf *ibuf;
+#ifdef WITH_HEADLESS
+	bbuf = NULL;
+#else
 	bbuf = IMB_ibImageFromMemory((unsigned char*)datatoc_prvicons, datatoc_prvicons_size, IB_rect);
+#endif
 	if (bbuf) {
 		for (y=0; y<SPECIAL_IMG_ROWS; y++) {
 			for (x=0; x<SPECIAL_IMG_COLS; x++) {