[PATCH] enable build support without systemd compatibility libraries

[Simon McVittie]

On 02/09/14 08:02, Umut Tezduyar Lindskog wrote:
> systemd 209 merged all the libraries to libsystemd. Old
> libraries can still be enabled with --enable-compat-libs
> switch in systemd but this increases the binary size.

Please send patches to Bugzilla so they don't get lost.

>      PKG_CHECK_MODULES(SYSTEMD,
>          [libsystemd-login >= 32, libsystemd-daemon >= 32, libsystemd-journal >= 32],
>          have_systemd=yes,
> -        have_systemd=no)
> +        PKG_CHECK_MODULES(SYSTEMD,
> +            [libsystemd >= 209],
> +            have_systemd=yes,
> +            have_systemd=no))

This looks reasonable, but is "underquoted" (the rule of thumb should be
one pair of [] per pair of ()).

Shouldn't the check be the other way round, so we check for libsystemd
if available, and fall back to libsystemd-* if not?

If you want to reduce binary size in a packaged distribution, it would
seem reasonable to package the compat *.pc files in a -dev/-devel
package, but not package the compat libraries: that's API-compatible
(but not ABI-compatible) with systemd < 209, and would allow dbus to be
compiled without changes.

    S