K 10
svn:author
V 8
bdrewery
K 8
svn:date
V 27
2017-06-17T20:33:11.741814Z
K 7
svn:log
V 1290
Fix Makefiles which override LIBDIR to not add incorrect dependencies into .depend.

This fixes these cases which would rebuild every time:
    make[6]: /usr/obj/usr/src/libexec/rtld-elf/tests/libpythagoras/.depend, 1: ignoring stale .depend for /usr/obj/usr/src/tmp/usr/tests/libexec/rtld-elf/libm.a
    make[6]: /usr/obj/usr/src/lib/libxo/tests/encoder/.depend, 1: ignoring stale .depend for /usr/obj/usr/src/tmp/usr/tests/lib/libxo/libxo.a
    make[7]: /usr/obj/usr/src/lib/libthr/tests/dlopen/dso/.depend, 1: ignoring stale .depend for /usr/obj/usr/src/tmp/usr/tests/lib/libthr/dlopen/libpthread.a

The problem is that some Makefiles will override LIBDIR to where they want
their library to install.  bsd.libnames.mk will then use ${LIBDIR} to define
where *existing* libraries are.  This then leads to looking for the
libraries in the *target* place rather than the *expected* place.

We may want to expand this (and all of the other *DIR variables in bsd.own.mk)
into something like what Ports has, a PREFIX and a LOCALBASE.  PREFIX being
where things are being installed to and LOCALBASE being where they already are.

For now store the default expected LIBDIR into LIBDIR_BASE and use that for
library locations.

Reported by:	sbruno
MFC after:	1 week
Sponsored by:	Dell EMC Isilon

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