Third try's a charm.

sourcepawn/compiler/sc2.c

@@ -59,6 +59,14 @@ static short skiplevel; /* level at which we started skipping (including nested
 static unsigned char term_expr[] = "";
 static int listline=-1; /* "current line" for the list file */
 
+#if defined DARWIN
+static double pow10(double d)
+{
+  return pow(10, d);
+}
+#endif
+
+
 /*  pushstk & popstk
  *
  *  Uses a LIFO stack to store information. The stack is used by doinclude(),