in the awk code to extract the version number from a header, avoid

the non-standard "gensub" function, from Alexander Nasonov per PM

math/mpfr/builtin.mk

@@ -1,4 +1,4 @@
-# $NetBSD: builtin.mk,v 1.1 2011/07/08 09:40:57 drochner Exp $
+# $NetBSD: builtin.mk,v 1.2 2011/07/14 18:06:59 drochner Exp $
 
 BUILTIN_PKG:=	mpfr
 
@@ -7,7 +7,7 @@ PKGCONFIG_BASE.mpfr=	/usr
 
 BUILTIN_VERSION_SCRIPT.mpfr= ${AWK} \
 	'/\#define[ \t]*MPFR_VERSION_STRING[ \t]/ { \
-	v = substr($$3, 2, length($$3)-2); } \
-	END { print gensub("-p",".",0,v); }'
+	v = substr($$3, 2, length($$3)-2) } \
+	END { gsub("-p",".",v); print v }'
 
 .include "../../mk/buildlink3/pkgconfig-builtin.mk"