From 96bb1b50e1eeb49ddf31369f3f5a077027a7cca5 Mon Sep 17 00:00:00 2001
From: Andy Wingo <wingo@pobox.com>
Date: Wed, 31 May 2017 21:50:09 +0200
Subject: [PATCH] guile.m4 fix for 3.0 prereleases

* meta/guile.m4 (GUILE_PROGS): Allow prereleases of Guile with a new
  major version.
---
 meta/guile.m4 | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/meta/guile.m4 b/meta/guile.m4
index 23c2c63bc..4978880a3 100644
--- a/meta/guile.m4
+++ b/meta/guile.m4
@@ -287,6 +287,9 @@ AC_DEFUN([GUILE_PROGS],
     else
       as_fn_error $? "Guile $_guile_required_version required, but $_guile_prog_version found" "$LINENO" 5
     fi
+  elif test "$GUILE_EFFECTIVE_VERSION" = "$_major_version.$_minor_version" -a -z "$_micro_version"; then
+    # Allow prereleases that have the right effective version.
+    true
   else
     AC_MSG_ERROR([Guile $_guile_required_version required, but $_guile_prog_version found])
   fi