$NetBSD: patch-configure,v 1.1 2019/10/01 14:55:22 nia Exp $

Shell portability.

--- configure.orig	2019-04-14 14:11:32.000000000 +0000
+++ configure
@@ -13005,7 +13005,7 @@ SDL_CFLAGS=
 SDL_LIBS=
 no_sdl=yes
 no_sdl2=yes
-if test "$OS_TYPE" == darwin -a "$WITH_FINK" = no; then
+if test "$OS_TYPE" = darwin -a "$WITH_FINK" = no; then
 
     { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether compiler supports framework SDL" >&5
 $as_echo_n "checking whether compiler supports framework SDL... " >&6; }
@@ -13971,7 +13971,7 @@ fi
 
 #
 # SDL2 on macOS needs 10.6 or above
-if test "$enable_sdl2" = yes -a "$OS_TYPE" == darwin; then
+if test "$enable_sdl2" = yes -a "$OS_TYPE" = darwin; then
 	export MACOSX_DEPLOYMENT_TARGET=10.6
 fi