RE: Strange errors regarding function '__alloca' on a Debian buster/sid i686 system

[Martin Dorey]

> checking whether closedir returns void... no
> ./configure: line 9678: PKG_PROG_PKG_CONFIG: command not found
> ./configure: line 9690: syntax error near unexpected token `GUILE,'
> ./configure: line 9690: `   PKG_CHECK_MODULES(GUILE, guile-2.0, 
> have_guile=yes,'
> debi686$

Perhaps it's:

https://askubuntu.com/questions/468661/how-to-fix-pkg-prog-pkg-config-command-not-found-error

I have that installed on the Debian box where I work on Make:

address@hidden:~$ dpkg -S /usr/share/aclocal/pkg.m4
pkg-config: /usr/share/aclocal/pkg.m4
address@hidden:~$

I don't know why that would have only kicked off now but, in my limited 
experience, autotools often works in ways that are similarly mysterious to me.