staden: possibly undefined macro: AC_MSG_ERROR despite pkg-config was added to Build-Depends

[Andreas Tille <andreas@an3as.eu>]

Hi,

I tried to build staden[1] using debhelper 11 but I get

...
   dh_autoreconf
aclocal: warning: autoconf input should be named 'configure.ac', not 'configure.in'
configure.in:32: error: possibly undefined macro: AC_MSG_ERROR
      If this token and others are legitimate, please use m4_pattern_allow.
      See the Autoconf documentation.
configure.in:33: error: possibly undefined macro: AC_MSG_WARN
autoreconf: /usr/bin/autoconf failed with exit status: 1
...

Since usually the solution is to add pkg-config to Build-Depends
I tried this but this does not change anything.  Any idea how to
fix this?

Kind regards

       Andreas.

[1] https://salsa.debian.org/med-team/staden

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