Log message:
workaround poll() being a compatibility function on Darwin 7
(MacOSX 10.3) by adding a custom test for _POLL_EMUL_H_ which is
defined in poll.h on some MacOSX 10.3 systems.

not all 10.3 systems have poll.h, so only do the poll() test if at
least one of the header files is found.

Log message:
no need to test for poll() twice.

Log message:
Include limits.h if available to shut down warnings about UINT_MAX on
Unixware.
Also tested on Linux, Solaris and NetBSD.

Log message:
Use statvfs on UnixWare, similar to Solaris and IRIX.

Log message:
remove NO_TOOLS. we need the tools stuff to have the .sunpro/.gcc
links created so the compiler can be found.

fixes build problem in sketch's bulk build.

Log message:
bump to 20040321 for vis.c multiple char[] fix.

Log message:
Some compilers (e.g. Sunpro) emit one char[] per string, even when
multiple identical strings appear in a source file.
As a result, comparing char *o to the "" pointer gives the wrong result
in vis.c, as the "" pointer we're checking against isn't the same as the
"" which initialised char *o.
Use a global pointer initialised to "", and use it for MAKEEXTRALIST()
calls.
Thanks to Christos Zoulas for suggesting the right solution :)

Log message:
#if 0 out the __weak_alias stuff, which isn't needed here. should fix
build on OpenBSD ELF platforms.

Log message:
Solaris has fsid_t in sys/vfs.h, so include appropriately.

This gets the new pkgsrc bootstrap working on Solaris.

Log message:
bump to 20040311 for Interix changes.