I've not tested any other recent RCs, but had a chance today to run this one on a subset of my normal pile of test platforms.

I am not sure why this has only hit me on NetBSD, because the problem looks pretty generic.
When looking at
   ompi/contrib/vt/vt/extlib/otf/tools/otfaux/Makefile.am
I find the following:
   otfaux_LDADD = \
           $(top_builddir)/otfauxlib/libotfaux.la \
           $(top_builddir)/otflib/libotf.la \
           $(MATHLIB)
   otfaux_DEPENDENCIES = $(otfaux_LDADD)

Since "MATHLIB = -lm" the dependencies list "-lm" as a target and results in a build which ends with
   Making all in otfaux
      CXX    otfaux.o
      CXX    Control.o
      CXX    Handler.o
      CXX    Stats.o
    make: don't know how to make -lm. Stop

In my testing the following patch resolves the problem by expressing LDADD in terms of DEPENDENCIES, instead of the other way around:
--- ompi/contrib/vt/vt/extlib/otf/tools/otfaux/Makefile.am.orig 2012-09-11 10:59:05.000000000 -0700
+++ ompi/contrib/vt/vt/extlib/otf/tools/otfaux/Makefile.am      2012-09-11 11:00:08.000000000 -0700
@@ -8,11 +8,12 @@
        otfaux
 endif
 
-otfaux_LDADD = \
+otfaux_DEPENDENCIES = \
        $(top_builddir)/otfauxlib/libotfaux.la \
-       $(top_builddir)/otflib/libotf.la \
+       $(top_builddir)/otflib/libotf.la
+otfaux_LDADD = \
+       $(otfaux_otfaux_DEPENDENCIES) \
        $(MATHLIB)
-otfaux_DEPENDENCIES = $(otfaux_LDADD)
 otfaux_SOURCES = \
        Control.h \
        Handler.h \


-Paul


On Tue, Sep 11, 2012 at 7:10 AM, Jeff Squyres <jsquyres@cisco.com> wrote:
1.6.2rc2 is out -- please test:

    http://www.open-mpi.org/software/ompi/v1.6/

Changes since rc1:

- VT compile fix on Solaris
- rmaps segv fix

--
Jeff Squyres
jsquyres@cisco.com
For corporate legal information go to: http://www.cisco.com/web/about/doing_business/legal/cri/


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--
Paul H. Hargrove                          PHHargrove@lbl.gov
Future Technologies Group
Computer and Data Sciences Department     Tel: +1-510-495-2352
Lawrence Berkeley National Laboratory     Fax: +1-510-486-6900