From: Mark Wooding <mdw@distorted.org.uk>
Date: Mon, 10 Mar 2025 13:44:45 +0000 (+0000)
Subject: m4/mdw-libtool-version-info.m4: Don't try to parse `UNKNOWN' token.
X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~mdw/git/cfd/commitdiff_plain/e4b3c2cce051f89b2701838d0c80fc359b2de43d?ds=inline

m4/mdw-libtool-version-info.m4: Don't try to parse `UNKNOWN' token.
---

diff --git a/m4/mdw-libtool-version-info.m4 b/m4/mdw-libtool-version-info.m4
index a4932b2..109603f 100644
--- a/m4/mdw-libtool-version-info.m4
+++ b/m4/mdw-libtool-version-info.m4
@@ -42,7 +42,14 @@ dnl -*-autoconf-*-
 
 # serial 1
 AC_DEFUN([mdw_LIBTOOL_VERSION_INFO],
-[set -- $(echo $PACKAGE_VERSION |
-	    sed 's:[^\([0-9][0-9]*\)\.\([0-9][0-9]*\)\.\([0-9][0-9]*\).*$]:\1 \2 \3:')
+[case $PACKAGE_VERSION in
+  UNKNOWN)
+    set -- 0 0 0
+    ;;
+  *)
+    num="\(@<:@0-9@:>@@<:@0-9@:>@*\)"
+    set -- $(echo $PACKAGE_VERSION | sed "s:^$num\.$num\.$num.*\$:\1 \2 \3:")
+    ;;
+esac
 LIBTOOL_VERSION_INFO="$(expr $[]1 + $[]2):$[]3:$[]2"
 AC_SUBST([LIBTOOL_VERSION_INFO])])