From 142182514b84ee233bc27e574df2ca2074291525 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ludovic=20Court=C3=A8s?= <ludo@gnu.org>
Date: Sat, 6 Jan 2018 14:45:01 +0100
Subject: build: Detect broken 'equal?' in Guile 2.2.1.

Fixes <https://bugs.gnu.org/29903>.
Reported by Mathieu Lirzin <mthl@gnu.org>.

* m4/guix.m4 (GUIX_ASSERT_SYNTAX_OBJECT_EQUAL): New macro.
* configure.ac: Use it.
---
 configure.ac | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'configure.ac')

diff --git a/configure.ac b/configure.ac
index aa70f140d3..53efa4a684 100644
--- a/configure.ac
+++ b/configure.ac
@@ -113,6 +113,10 @@ AM_CONDITIONAL([HAVE_GUILE_JSON], [test "x$have_guile_json" = "xyes"])
 dnl Make sure we have a full-fledged Guile.
 GUIX_ASSERT_GUILE_FEATURES([regex posix socket net-db threads])
 
+dnl Make sure we don't suffer from the bug in 'equal?' wrt. syntax objects
+dnl found in 2.2.1.  See <https://bugs.gnu.org/29903>.
+GUIX_ASSERT_SYNTAX_OBJECT_EQUAL
+
 dnl Decompressors, for use by the substituter and other modules.
 AC_PATH_PROG([GZIP], [gzip])
 AC_PATH_PROG([BZIP2], [bzip2])
-- 
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