From dc53edf2132fa7a25a75e2f8f12ed4623c4cbb2a Mon Sep 17 00:00:00 2001
From: "Thomas E. Dickey" <dickey@invisible-island.net>
Date: Thu, 4 Jul 2019 14:46:44 -0400
Subject: add --disable-const option, from libXt

---
 configure.ac | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/configure.ac b/configure.ac
index 577855a..a75e817 100644
--- a/configure.ac
+++ b/configure.ac
@@ -106,6 +106,14 @@ case $host_os in
 	;;
 esac
 
+AC_MSG_CHECKING(if C const-support is wanted)
+AC_ARG_ENABLE(const, AS_HELP_STRING([--disable-const], [Disable const-support]),
+	USE_CONST="$enableval", USE_CONST="yes")
+AC_MSG_RESULT($USE_CONST)
+if test "x$USE_CONST" = "xyes" ; then
+	AC_DEFINE(_CONST_X_STRING, 1, [Define to 1 to use standard C const feature.])
+fi
+
 AC_CONFIG_FILES([Makefile
 		include/Makefile
 		man/Makefile
-- 
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