$OpenBSD: patch-configure_ac,v 1.1 2020/01/09 23:31:25 sthen Exp $

Index: configure.ac
--- configure.ac.orig
+++ configure.ac
@@ -693,11 +693,12 @@ else
     if test `$SWIG -help 2>&1 | $EGREP -c '\-guile *- Generate'` = 0; then
       use_guile="No (swig does not support -guile option)"
     else
-      AC_CHECK_PROGS(GUILE,guile2 guile1.8 guile)
+      AC_CHECK_PROGS(GUILE,guile1.8 guile)
       if test "x$GUILE" = "x"; then
         use_guile="No (guile not available)"
       else
         [GUILE_VERSION=`$GUILE --version | sed -n '1 s/^.* \+\([0-9\.]\+\)$/\1/ p'`]
+        [GUILE_VERSION=`$GUILE --version | sed -n '1 s/^Guile \([0-9][0-9]*\.[0-9][0-9]*\.[0-9][0-9]*\)$/\1/ p'`]
         GUILE_VERSION_MAJOR=`echo $GUILE_VERSION | cut -d '.' -f 1`
         GUILE_VERSION_MINOR=`echo $GUILE_VERSION | cut -d '.' -f 2`
         if test 0$GUILE_VERSION_MAJOR -lt 2; then
