bug#24857: emacs24/25 FTBFS since a long time on GNU/Hurd

[Eli Zaretskii]

> From: Svante Signell <svante.signell@gmail.com>
> Cc: eggert@cs.ucla.edu, 24857@debbugs.gnu.org
> Date: Fri, 11 Nov 2016 12:33:25 +0100
> 
> > Evidently, you do have libsystemd on your machine, because the
> > configure script detects its presence (by calling pkg-config), and
> > also the link step of the build succeeds to link against libsystemd.
> > What is the story here?
> 
> There is a dummy systemd development library installed, to enable build of 
> some
> packages:
> ii  libsystemd-dev    222-1         hurd-i386     Dummy systemd utility 
> library
> 
> This is a Debian construct.
> 
> #> dpkg -s libsystemd-dev
> Package: libsystemd-dev
> Status: install ok installed
> Priority: extra
> Section: oldlibs
> Installed-Size: 27
> Maintainer: Debian systemd Maintainers 
> <pkg-systemd-maintainers@lists.alioth.deb
> ian.org>
> Architecture: hurd-i386
> Source: libsystemd-dummy
> Version: 222-1
> Description: Dummy systemd utility library
>  This package provides a dummy version of the libsystemd-dev
>  package for the architectures which lack an implementation of the library.
> 
> #> dpkg -L libsystemd-dev
> /.
> /usr
> /usr/include
> /usr/include/systemd
> /usr/include/systemd/sd-daemon.h
> /usr/lib
> /usr/lib/pkgconfig
> /usr/lib/pkgconfig/libsystemd.pc
> /usr/share
> /usr/share/doc
> /usr/share/doc/libsystemd-dev
> /usr/share/doc/libsystemd-dev/copyright
> /usr/share/doc/libsystemd-dev/changelog.Debian.gz
> /usr/lib/pkgconfig/libsystemd-daemon.pc
> 
> Maybe you should have some better way of detecting libsystemd presence?

If you can suggest a way to detect this dummy version, we can
incorporate it in the configure script.

> I don't really understand why a GNU project adds support for the systemd
> disaster.

One man's disaster is another man's most wanted feature.  The world is
divided wrt systemd, and Emacs as a project doesn't have a firm stand
about that.

Thanks.