From 54e9b9d2b392b33e0a518fe3cfc55598f63cd51b Mon Sep 17 00:00:00 2001
From: gahr <gahr@gahr.ch>
Date: Mon, 30 Dec 2019 13:48:44 +0000
Subject: Fix equality check, reported by Emiliano

---
 unix/configure.ac | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/unix/configure.ac b/unix/configure.ac
index b2370b7..b893d1a 100644
--- a/unix/configure.ac
+++ b/unix/configure.ac
@@ -175,7 +175,7 @@ AC_ARG_WITH(system-libtommath,
 AC_HELP_STRING([--with-system-libtommath],
 	[use external libtommath (default: true if available, false otherwise)]),
 	libtommath_ok=${withval})
-if test x"${libtommath_ok}" == x -o x"${libtommath_ok}" != xno; then
+if test x"${libtommath_ok}" = x -o x"${libtommath_ok}" != xno; then
     AC_CHECK_HEADER([tommath.h],[
 	AC_CHECK_TYPE([mp_int],[],[libtommath_ok=no],[#include <tommath.h>])],[
 	libtommath_ok=no])
-- 
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