From 589f958662a2dcaacdb9a66f1088c74828a39577 Mon Sep 17 00:00:00 2001
From: Fabian Jahr <fjahr@protonmail.com>
Date: Sun, 20 Dec 2020 22:08:15 +0100
Subject: [PATCH] build: Check for 128 bit integer support

Used in MuHash3072 implementation.

Co-authored-by: Pieter Wuille <pieter.wuille@gmail.com>
---
 configure.ac | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/configure.ac b/configure.ac
index ef2f31e582..e1c78c1a69 100644
--- a/configure.ac
+++ b/configure.ac
@@ -753,6 +753,9 @@ if test x$use_lcov_branch != xno; then
   AC_SUBST(LCOV_OPTS, "$LCOV_OPTS --rc lcov_branch_coverage=1")
 fi
 
+dnl Check for __int128
+AC_CHECK_TYPES([__int128])
+
 dnl Check for endianness
 AC_C_BIGENDIAN