Mr. Squyres,
We appreciate that you submitted patches to the libtool development team and were are able have these patches accepted. As far as we can tell libtool is correct, however it has exposed a bug in our driver (see Linker option) where we are not preserving the order of position sensitive flags when passed to the linker. We have submitted a techinal problem report (TPR#3477) to our engineers and hope to have the issue resolved in the near future.
The correct work around here would be to either call ld directly or use gcc. In this case, both pgcc and gcc simply envoke ld, pgcc just puts some of the flags in the wrong place.
Thank you for your efforts!
Mat