$NetBSD: patch-aj,v 1.4 2013/07/22 14:24:17 drochner Exp $

--- hacks/fireworkx.c.orig	2013-07-05 18:54:55.000000000 +0000
+++ hacks/fireworkx.c
@@ -141,7 +141,11 @@ static void render_light_map(struct stat
 		for (x = 0; x < st->width; x += 2, v += SHELLCOUNT)
 		{
 			float f;
+#ifdef HAVE_SQRTF
 			f = sqrtf((fs->cx - x) * (fs->cx - x) + (fs->cy - y) * (fs->cy - y)) + 4.0;
+#else
+			f = sqrt((fs->cx - x) * (fs->cx - x) + (fs->cy - y) * (fs->cy - y)) + 4.0;
+#endif
 			f = FLASH_ZOOM / f;
 			f += pow(f,0.1) * frand(0.0001); /* dither */
 			st->light_map[v] = f;