$NetBSD: patch-configure.ac,v 1.1 2022/04/24 12:02:14 tnn Exp $

shell portability

--- configure.ac.orig	2018-03-24 13:37:56.000000000 +0000
+++ configure.ac
@@ -21,33 +21,33 @@ AC_PROG_CPP
 AC_PROG_INSTALL
 
 AC_CHECK_PROG([FOUND_CLANG], [clang], [yes])
-if test "x$FOUND_CLANG" == "xyes" ; then
+if test "x$FOUND_CLANG" = "xyes" ; then
   CC="clang"
 fi
 
-if test "x$GCC" == "xyes" -o "x$CC" == "xclang"; then
+if test "x$GCC" = "xyes" -o "x$CC" = "xclang"; then
   CFLAGS="$CFLAGS -Wall"
 fi
 
 dnl Checks for html conversion tool from man page
 AC_CHECK_PROG([FOUND_GROFF], [groff], [yes])
-if test x"$FOUND_GROFF" == x"yes" ; then
+if test x"$FOUND_GROFF" = x"yes" ; then
   if $(groff -Thtml -mdoc rtpplay.1 > /dev/null 2>&1) ; then
     WORKS_GROFF="yes"
   fi
 fi
-AM_CONDITIONAL([HAVE_GROFF], [test x"$WORKS_GROFF" == x"yes"])
+AM_CONDITIONAL([HAVE_GROFF], [test x"$WORKS_GROFF" = x"yes"])
 
 AC_CHECK_PROG([FOUND_MANDOC], [mandoc], [yes])
-if test x"$FOUND_MANDOC" == x"yes" ; then
+if test x"$FOUND_MANDOC" = x"yes" ; then
   if $(mandoc -Thtml rtpplay.1 > /dev/null 2>&1)  ; then
     WORKS_MANDOC="yes"
   fi
 fi
-AM_CONDITIONAL([HAVE_MANDOC], [test x"$WORKS_MANDOC" == x"yes"])
+AM_CONDITIONAL([HAVE_MANDOC], [test x"$WORKS_MANDOC" = x"yes"])
 
-AM_CONDITIONAL([FOUND_GEN_HTML], [test x"$WORKS_GROFF" == x"yes"] || 
-  [test x"$WORKS_MANDOC" == x"yes"])
+AM_CONDITIONAL([FOUND_GEN_HTML], [test x"$WORKS_GROFF" = x"yes"] || 
+  [test x"$WORKS_MANDOC" = x"yes"])
 
 dnl Checks for header files.
 AC_HEADER_STDC