Adding --with-systemdsystemunitdir configure option

[Ray Strode]

sure, pushed. thanks.

On Fri, Mar 20, 2015 at 6:20 AM, Enrico Tagliavini
<enrico.tagliavini at gmail.com> wrote:
> Hi there,
>
> while packaging plymouth 0.9.2 for gentoo we got a minor issue in case
> systemd is not installed on the building machine. I think this problem
> can also happen where the machine where the package is built might
> have a different init system / different configuration than the one
> the package is installed to (like OBS, koji and the like). See [1].
>
> In short there seems to be a shortcoming in the way the systemd unit
> directory is detected in AC:
>
> if test x$enable_systemd_integration = xyes; then
>   AC_DEFINE(PLY_ENABLE_SYSTEMD_INTEGRATION, 1, [Coordinate boot up
> with systemd])
>   SYSTEMD_UNIT_DIR=$($PKG_CONFIG --variable=systemdsystemunitdir systemd)
>   AC_SUBST(SYSTEMD_UNIT_DIR)
> fi
>
> if systemd is not installed the SYSTEMD_UNIT_DIR variable will be
> empty, but the failure is not handled and unit files will be installed
> under /.
>
> Gentoo developer Yixun Lan developed the patch, available at [2], to
> introduce the --with-systemdsystemunitdir configure argument. With
> this patch the package can be built also in systems where systemd is
> not installed or with a different path for the unit directory. This
> same option is commonly used by other packages, for example lvm2,
> udisk, firewalld, rsyslog, networkmanager, gdm,upower and many others.
>
> Would you be interested to merge this patch or something along those lines?
>
> Best regards.
> Enrico Tagliavini
>
>
> [1] https://bugs.gentoo.org/show_bug.cgi?id=543712
> [2] https://543712.bugs.gentoo.org/attachment.cgi?id=399310
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