Re: An error of building mcron from git

[Wensheng Xie]

Thanks for the reply, Mathieu.

I had guile 2.2 installed, which I think does not have GUILE_PKG.

I tried it again under guile 3.0. The bootstrap then has an error.

```
./bootstrap
+ exec autoreconf -vfi
autoreconf: export WARNINGS=
autoreconf: Entering directory '.'
autoreconf: configure.ac: not using Gettext
autoreconf: running: aclocal --force 
autoreconf: configure.ac: tracing
autoreconf: configure.ac: not using Libtool
autoreconf: configure.ac: not using Intltool
autoreconf: configure.ac: not using Gtkdoc
autoreconf: running: 
/gnu/store/dyijx4x1js04zpk731q93fmmzywllad0-autoconf-2.71/bin/autoconf --force
configure.ac:46: warning: PKG_PROG_PKG_CONFIG is m4_require'd but not m4_defun'd
aclocal.m4:49: GUILE_PKG is expanded from...
configure.ac:46: the top level
configure:2650: error: possibly undefined macro: PKG_PROG_PKG_CONFIG
      If this token and others are legitimate, please use m4_pattern_allow.
      See the Autoconf documentation.
configure:2677: error: possibly undefined macro: PKG_CHECK_EXISTS
autoreconf: error: 
/gnu/store/dyijx4x1js04zpk731q93fmmzywllad0-autoconf-2.71/bin/autoconf failed 
with exit status: 1
wxie@guix ~/work/mcron$ guile -v
guile (GNU Guile) 3.0.5
Copyright (C) 2021 Free Software Foundation, Inc.

License LGPLv3+: GNU LGPL 3 or later <http://gnu.org/licenses/lgpl.html>.
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
wxie@guix ~/work/mcron$
```

There are more undefined macros. What did I have missed?

best regards,
wxie