Fix shell code portability


(joerg)

$NetBSD: patch-autoconf_Makefile.common.in,v 1.1 2020/03/18 18:02:11 joerg Exp $

--- autoconf/Makefile.common.in.orig	2020-03-18 14:06:28.445542718 +0000
+++ autoconf/Makefile.common.in
@@ -40,7 +40,7 @@ uninstall.script:
 
 indent:
 		@SRCS=`echo "$(OBJS) " | sed "s/.o /.c /g"`; \
-		if test "x$$SRCS" == "x"; then exit; fi; \
+		if test "x$$SRCS" = "x"; then exit; fi; \
 		for i in $$SRCS; do \
 		  if (indent -di14 -ts4 -i4 -l100 -lc80 -bad -nbbb -bli0 -c48 -cd48 -ce -cli1 -ncs -nbs -nbbo -hnl < $$i > /tmp/$$i); then \
 		    echo "indent $$i"; \

$NetBSD: patch-autoconf_Makefile.common.lib.in,v 1.1 2020/03/18 18:02:11 joerg Exp $

--- autoconf/Makefile.common.lib.in.orig	2020-03-18 14:06:31.401515544 +0000
+++ autoconf/Makefile.common.lib.in
@@ -170,7 +170,7 @@ distclean:
 
 indent:
 		@SRCS=`echo "$(LIB_OBJS) " | sed "s/.o /.c /g"`; \
-		if test "x$$SRCS" == "x"; then exit; fi; \
+		if test "x$$SRCS" = "x"; then exit; fi; \
 		for i in $$SRCS; do \
 		  if (indent -di14 -ts4 -i4 -l120 -lc80 -bad -nbbb -bli0 -c48 -cd48 -ce -cli1 -ncs -nbs -nbbo -hnl < $$i > /tmp/$$i); then \
 		    echo "indent $$i"; \

$NetBSD: patch-autoconf_configure.in,v 1.1 2020/03/18 18:02:11 joerg Exp $

--- autoconf/configure.in.orig	2020-03-18 14:07:14.156091126 +0000
+++ autoconf/configure.in
@@ -105,7 +105,7 @@ AC_ARG_ENABLE(send-postcard-to-developer
 AC_ARG_ENABLE(data-reinstall,   [  --enable-data-reinstall will prevent AfterStep from reinstalling image and font files.[[yes]] ],data_reinstall=$enableval,data_reinstall="yes")
 
 AC_ARG_ENABLE(script,		[  --enable-script         compile Script module [[yes]] ], enable_script=$enableval,enable_script="yes")
-AC_ARG_ENABLE(reuse-font,	[  --enable-reuse-font     enables reuse of loaded font resource by modules (don't use with TrueType fonts !)[[no]] ],[if test x$enableval == "xyes"; then AC_DEFINE(MODULE_REUSE_LOADED_FONT,1,Enables reuse of loaded font resource by modules) fi])
+AC_ARG_ENABLE(reuse-font,	[  --enable-reuse-font     enables reuse of loaded font resource by modules (don't use with TrueType fonts !)[[no]] ],[if test x$enableval = "xyes"; then AC_DEFINE(MODULE_REUSE_LOADED_FONT,1,Enables reuse of loaded font resource by modules) fi])
 
 dnl# For FreeBSD, add -I/usr/local/include
 

$NetBSD: patch-libAfterBase_Makefile.in,v 1.1 2020/03/18 18:02:11 joerg Exp $

--- libAfterBase/Makefile.in.orig	2020-03-18 14:06:35.861132200 +0000
+++ libAfterBase/Makefile.in
@@ -249,7 +249,7 @@ distclean:	clean
 
 indent:
 		@SRCS=`echo "$(LIB_OBJS) " | sed "s/.o /.c /g"`; \
-		if test "x$$SRCS" == "x"; then exit; fi; \
+		if test "x$$SRCS" = "x"; then exit; fi; \
 		for i in $$SRCS; do \
 		  if (indent -di14 -ts4 -i4 -l120 -lc80 -bad -nbbb -bli0 -c48 -cd48 -ce -cli1 -ncs -nbs -nbbo -hnl < $$i > /tmp/$$i); then \
 		    echo "indent $$i"; \

$NetBSD: patch-libAfterImage_Makefile.in,v 1.1 2020/03/18 18:02:11 joerg Exp $

--- libAfterImage/Makefile.in.orig	2020-03-18 14:05:16.947587042 +0000
+++ libAfterImage/Makefile.in
@@ -297,7 +297,7 @@ distclean: clean
 
 indent:
 		@SRCS=`echo "$(AFTERIMAGE_OBJS) " | sed "s/.o /.c /g"`; \
-		if test "x$$SRCS" == "x"; then exit; fi; \
+		if test "x$$SRCS" = "x"; then exit; fi; \
 		for i in $$SRCS; do \
 		  if (indent -di14 -ts4 -i4 -l120 -lc80 -bad -nbbb -bli0 -c48 -cd48 -ce -cli1 -ncs -nbs -nbbo -hnl < $$i > /tmp/$$i); then \
 		    echo "indent $$i"; \

$NetBSD: patch-libAfterImage_aftershow_Makefile.in,v 1.1 2020/03/18 18:02:11 joerg Exp $

--- libAfterImage/aftershow/Makefile.in.orig	2020-03-18 14:06:01.994412756 +0000
+++ libAfterImage/aftershow/Makefile.in
@@ -84,7 +84,7 @@ distclean:
 
 indent:
 		@SRCS=`find . -name "*.c"`; \
-		if test "x$$SRCS" == "x"; then exit; fi; \
+		if test "x$$SRCS" = "x"; then exit; fi; \
 		for i in $$SRCS; do \
 		  if (indent -di14 -ts4 -i4 -l100 -lc80 -bad -nbbb -bli0 -c48 -cd48 -ce -cli1 -ncs -nbs -nbbo -hnl < $$i > /tmp/$$i); then \
 		    echo "indent $$i"; \

$NetBSD: patch-libAfterImage_apps_Makefile.in,v 1.1 2020/03/18 18:02:11 joerg Exp $

--- libAfterImage/apps/Makefile.in.orig	2020-03-18 14:05:44.569598848 +0000
+++ libAfterImage/apps/Makefile.in
@@ -81,7 +81,7 @@ distclean:
 
 indent:
 		@SRCS=`find . -name "*.c"`; \
-		if test "x$$SRCS" == "x"; then exit; fi; \
+		if test "x$$SRCS" = "x"; then exit; fi; \
 		for i in $$SRCS; do \
 		  if (indent -di14 -ts4 -i4 -l100 -lc80 -bad -nbbb -bli0 -c48 -cd48 -ce -cli1 -ncs -nbs -nbbo -hnl < $$i > /tmp/$$i); then \
 		    echo "indent $$i"; \