$NetBSD: patch-configure,v 1.4 2019/09/21 09:52:42 adam Exp $

Portability fix.

--- configure.orig	2016-02-10 20:17:35.000000000 +0000
+++ configure
@@ -15087,7 +15087,7 @@ fi
 # (No need to use AC_SUBST on this default substituted environment variable.)
 # Only add these additional CFLAGS if we are using GCC. Other C compilers may
 # not support them.
-if test x"$GCC" == "xyes" ; then
+if test x"$GCC" = "xyes" ; then
 	CFLAGS="$CFLAGS -Wall -Wmissing-prototypes"
 fi