cannot compile with autoconf error

[paolino]

archlinux up to date here

[paolino@localhost ~]$ git clone https://github.com/williamweston/phasex.git
Cloning into 'phasex'...
remote: Counting objects: 472, done.
remote: Compressing objects: 100% (300/300), done.
remote: Total 472 (delta 259), reused 383 (delta 170)
Receiving objects: 100% (472/472), 10.03 MiB | 447.00 KiB/s, done.
Resolving deltas: 100% (259/259), done.
[paolino@localhost ~]$ cd phasex/
[paolino@localhost phasex]$ aclocal && autoconf && automake && autoheader
configure.ac:213: error: possibly undefined macro: AC_DEFINE
If this token and others are legitimate, please use m4_pattern_allow.
See the Autoconf documentation.
configure.ac:221: error: possibly undefined macro: AC_MSG_WARN

configure.ac:213: error: possibly undefined macro: AC_DEFINE
If this token and others are legitimate, please use m4_pattern_allow.
See the Autoconf documentation.
configure.ac:221: error: possibly undefined macro: AC_MSG_WARN

It seems a syntax error catched as something different, but I'm not expert in autoconf.
Please fix.

Thanks
paolino

[williamweston]

This I have never been able to reproduce exactly, but I did run into other issues with the included autoconf scripts being out of date that I didn't see until updating my Fedora distro. The scripts have been updated, so there's a good chance this fixed your issue as well as mine.