“If two pointers p and q of the same type point to different that are
not members of the same object or elements of the same array or to
different functions, or if only one of them is null, the results of
p<q, p>q, p<=q, and p>=q are unspecified.”

Signed-off-by: Anders Kaseorg <andersk@mit.edu>

Closes #28 github issue.

Signed-off-by: Anders Kaseorg <andersk@mit.edu>

$(builddir) is always ., except apparently on automake 1.9 which
doesn’t define it.

Signed-off-by: Anders Kaseorg <andersk@mit.edu>

Signed-off-by: Anders Kaseorg <andersk@mit.edu>

Signed-off-by: Anders Kaseorg <andersk@mit.edu>

[andersk@mit.edu: Move code to new third/libstddjb directory]

Use selfpipe in our client, server, and examples.

Signed-off-by: Anders Kaseorg <andersk@mit.edu>

environ doesn’t work on OS X.

Signed-off-by: Anders Kaseorg <andersk@mit.edu>

[seph@directionless.org, andersk@mit.edu: add in even more places]

Add mach_absolute_time and gettimeofday timestamp implementations, and
fix clock_gettime check so that it can actually succeed

On most systems, even if __STDC_ISO_10646__ is not declared, wchar_t
will be correct in a UTF-8 locale. The client and server both enforce
a locale check on startup.