$NetBSD$

Address portability issues.

--- configure.orig	2023-06-24 01:23:06.000000000 +0000
+++ configure
@@ -7450,7 +7450,7 @@ $as_echo "no" >&6; }
 	{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for (guessing) appropriate ${CC_VENDOR} optimization flags" >&5
 $as_echo_n "checking for (guessing) appropriate ${CC_VENDOR} optimization flags... " >&6; }

-	if test "$fla_enable_compiler_optimizations" == "yes" ; then
+	if test "$fla_enable_compiler_optimizations" = "yes" ; then

 				case ${CC_VENDOR} in
 						gcc)
@@ -7568,7 +7568,7 @@ $as_echo "no" >&6; }
 	{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for (guessing) appropriate ${CC_VENDOR} warning flags" >&5
 $as_echo_n "checking for (guessing) appropriate ${CC_VENDOR} warning flags... " >&6; }

-	if test "$fla_enable_compiler_warnings" == "yes" ; then
+	if test "$fla_enable_compiler_warnings" = "yes" ; then

 				case ${CC_VENDOR} in
 						gcc)
@@ -7685,7 +7685,7 @@ $as_echo "no" >&6; }
 	{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for (guessing) appropriate ${CC_VENDOR} debug flags" >&5
 $as_echo_n "checking for (guessing) appropriate ${CC_VENDOR} debug flags... " >&6; }

-	if test "$fla_enable_compiler_debug" == "yes" ; then
+	if test "$fla_enable_compiler_debug" = "yes" ; then

 				case ${CC_VENDOR} in
 						gcc)
@@ -7803,7 +7803,7 @@ $as_echo "no" >&6; }
 	{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for (guessing) appropriate ${CC_VENDOR} profiling flags" >&5
 $as_echo_n "checking for (guessing) appropriate ${CC_VENDOR} profiling flags... " >&6; }

-	if test "$fla_enable_compiler_profiling" == "yes" ; then
+	if test "$fla_enable_compiler_profiling" = "yes" ; then

 				case ${CC_VENDOR} in
 						gcc)