systemd >= 209 merged the individual libraries libsystemd-journal,
libsystemd-login, libsystemd-id128 and libsystemd-daemon into
a single library, libsystemd. To ease the transition one could pass
an option to its build to generate stub libraries and matching
pkg-config files. With systemd >= 229 this option has now been
removed, causing the build to fail when the journald option is
enabled.
Change-Id: I26670f207f1a9e79c16be5ce8c8a49353143c5ba
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@theqtcompany.com>
Reviewed-by: Robin Burchell <robin.burchell@viroteck.net>
Instead of merely intercepting logging output from stdout/stderr from the
journal side of started processes, this has the advantage of meaning that the
origin process name will be correct.
fprintf won't work, because if a process starts children (like e.g. a
homescreen does), then their stdout/stderr are merged into their parent, and
journal has no way of differentiating the origin.
We are also able to store information about the context of logging, which might
be useful in post-mortem cases.
[ChangeLog][Platform Specific Changes][Linux] Systems with systemd may now pass
-journald to configure to send logging output to journald. Logging will still be
sent to stderr for interactive applications (run from a tty) or with
QT_NO_JOURNALD_LOG set to a non-empty value.
Change-Id: Ib260cec1ea87390bf44f267d217d795583407d00
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
