> bmake: 
> "../../mk/wrapper/../../mk/buildlink3/../../mk/wrapper/../../mk/buildlink3/bsd.buildlink3.mk" 
> line 48: warning: Couldn't read shell's output for "true Computing 
> BUILDLINK_PREFIX.pthread;                        /usr/sbin/pkg_info -K . 
> -qp  |  /bin/sed  -e "s,^[^/]*,,;q""


I should have mentioned my LOCALBASE is /usr.

My workaround for this is now in my mk.conf:

PREFER_NATIVE_PTHREADS=         no
_PKG_PTHREAD?=                  glibc
_PKG_PTHREAD_DEPENDS?=          glibc>=2.3.0
_PKG_PTHREAD_PKGSRCDIR?=        ../../wip/${_PKG_PTHREAD}
_PKG_PTHREAD_BUILDLINK3_MK?=    ${_PKG_PTHREAD_PKGSRCDIR}/buildlink3.mk

(That buildlink3.mk is not committed yet.)

Does anyone have ideas on how to do this properly for pkgsrc? Also for 
getopt, dlopen, and others that can use the glibc package?