makes the test a bit more difficult, per discussions with Paul
Hargrove when going through the release process for hwloc 1.3.2.
This "improved" test is already on OMPI v1.4 -- not sure why it's not
on the trunk or OMPI v1.5 branch. It looks like the extra fprintf got
lost in the translation from AC_TRY_LINK to AC_LINK_IFELSE.
This commit was SVN r25909.