In ompi/contrib/vt/vt/extlib/otf/acinclude.m4, in the macros WITH_DEBUG and WITH_VERBOSE, dubious constructs such as
AC_CACHE_CHECK([debug], [debug], [debug=]) are used. These have the following problems: * Cache variables need to match *_cv_* in order to actually be saved (where the bit before _cv_ is preferably a package or author prefix, for namespace cleanliness; see <http://www.gnu.org/software/autoconf/manual/html_node/Cache-Variable-Names.html>. The next Autoconf version will warn about this. * There is little need to cache information that the user provided on the configure command line. If configure is rerun by './config.status --recheck', it remembers the original configure command line. Only if the user manually reruns configure (and keeps config.cache) does this make a difference. So I suggest you remove those two instances of AC_CACHE_CHECK usage, or forward this information to the author of oft. Thanks, Ralf