svn commit: r452962 - head/math/libRmath

[Joseph Mingrone]

Tijl Coosemans <tijl at FreeBSD.org> writes:
> It's not a gfortran problem.  It's a kernel or libthr problem.  You can
> work around it by avoiding the combination of recycled thread stacks and
> exception handling done by ports libgcc_s.  When you switched from curl
> to wget you avoided threads and that fixed the problem.  Switching to
> flang avoids ports libgcc_s and that also fixes the problem, but it's not
> necessary to go this way.  You could probably go back to curl if you
> build it with the CARES option instead of THREADED_RESOLVER.

I missed this paragraph last time around.

It's not really a switch to wget.  We just pull it in as RUN_DEPENDS
when gfortran is on.  R still defaults to downloading packages with
curl.  Users can create/edit configuration to switch to wget, which is
not a big deal, but not ideal.  I've copied sunpoet@, the maintainer of
ftp/curl.  sunpoet@, what do you think about switching ftp/curl's
default to c-ares instead of THREADED_RESOLVER to work around this
problem (until there are fixes for the threading problem that is
triggered with ports libgcc_s)?

Here is a quick-and-dirty poudriere testport run.  I say quick-and_dirty
because 1) I just included ports, which have a Makefile with
USES.*fortran in them, so there are probably some ports missing and 2) I
haven't looked in detail at the build logs to see what is going on.
math/lapack resulted in, by far, the most severe fallout.

http://pkg.awarnach.mathstat.dal.ca/build.html?mastername=11amd64-default&build=2017-10-28_12h15m47s
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