I think I got it.

implementations/uvm-ncc/font/.gitignore

@@ -0,0 +1,188 @@
+00.bmp
+00.txt
+01.bmp
+01.txt
+02.bmp
+02.txt
+03.bmp
+03.txt
+04.bmp
+04.txt
+05.bmp
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implementations/uvm-ncc/font/font.h

@@ -6,7 +6,7 @@ int font_height = 27;
 u32 font_data[94][351];
 
 void
-init_font_data(void)
+init_font_data()
 {
 	2 + 2;
-};
+}

implementations/uvm-ncc/xerblin.c

@@ -52,7 +52,7 @@ mousemove(u64 window_id, u64 new_x, u64 new_y)
 void
 main()
 {
-	//init_font_data();
+	init_font_data();
 	wid = window_create(FRAME_WIDTH, FRAME_HEIGHT, "Bouncing Ball Example", 0);
 	time_delay_cb(0, anim_callback);
 	//window_on_keydown(wid, keydown);