trouble on Ubuntu, where the Gtk test programs don't check the return value
from system() and thus fall foul of the combination of our -Werror and
<https://wiki.ubuntu.com/CompilerFlags#-D_FORTIFY_SOURCE=2>.
[originally from svn r8638]
in the presence of GTK 2 we also check to see whether we have a
prehistoric Pango (since Pango itself helpfully doesn't provide that
functionality, bah).
[originally from svn r7964]
<sys/time.h>. Cope with this. Where <sys/select.h> _is_ available, though,
use it (since it's where POSIX puts select()). Problem reported by Mike
Protts.
[originally from svn r6310]
X/Open and actually seems to be more common (NetBSD has it). Also use
updwtmpx() rather than directly writing to the wtmpx file, though more for
reasons of aesthetics than anything practical.
[originally from svn r5678]
necessary on Solaris if we want to use SIOCATMARK. Using sockatmark() might
be preferable, but despite being notionally standard it's missing on
Solaris 9 and Mac OS X 10.3.9, whereas everyone seems to have SIOCATMARK
somewhere.
[originally from svn r5676]
rather than relying on the user to edit the Makefile. Makefile.gtk
still works as well as it ever did, but now we get a Makefile.in alongside
it. mkunxarc.sh now relies on autoconf and friends to build the configure
script for the Unix source distribution.
[originally from svn r5673]
