can't compile with reiser4

[David Masover <ninja@slaphack.com>]

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glibc) on my system now either fail to install, continue trying to
install forever (make caught in an infinite loop), or install but don't
work later.  My / is reiser4, with separate mountpoints for /boot, /sys,
/proc, /dev, /dev/pts, and /dev/shm.  So this doesn't make sense...

I think I've figured out one reason it's failing, though:  I've found a
certain place where if I do something like 'make foo.o', it builds foo.o
just fine (out of foo.c), but foo.c gets its mtime updated right along
with foo.o -- making foo.o out of date.  This is not just defeating the
purpose of 'make' (being able to rebuild a selective portion of a
program and not the whole thing, based on mtimes) but causes at least
one program (sudo) to not install properly.

The way that works is that 'make' is called once for the build, with all
the paths (including --sysconfdir) set to their ultimate destinations in
/, and then 'make install' is called again, with these paths set to the
same thing, but inside the install tree -- so instead of /etc, we get
/var/tmp/portage/sudo-1.6.7/install//etc
(I may not have those versions or paths right.)

This is fine, because 'make install' is usually just copying files
around, so we want the files copied to that temporary install directory
(so we can do an atomic merge).  But because so many .c files are just
as new as the .o files, so much (if not everything) must be rebuilt
during 'make install' -- which means sudo becomes hardcoded to look for
its config file somewhere in /var/tmp.

More details if you want them...
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