William Stein wrote:
I just spent a while trying to figure out how to get R png graphics to
work again in Sage-6.2rc0 on Ubuntu 14.04. Note that graphics worked
fine with Sage-6.2beta1 on Ubuntu 12.04. Karl Dieter's many random
posts around the web asking about this problem were helpful, though in
this case the problem is new in sage-6.2rc0 due to trac #15742, and
will kill R usage for a lot of people if we release sage-6.2.rc0 as
is...
I tracked the problem down to pkg-config being in Sage-6.2rc0, whereas
it is not in Sage-6.2beta1.
This is because of http://trac.sagemath.org/ticket/15742, which is
very important to getting Sage to build at all on some wonky systems.
But on a mainstream modern Linux OS this ticket leads to problems.
Wouldn't it be better to only build/install pkgconfig on systems that
don't have a good one already?
My solution to deal with this R problem is:
cd $SAGE_ROOT/local/bin && mv pkg-config pkg-config.orig && ln -s
/usr/bin/pkg-config .
sage -f r
Could someone elaborate the problem(s), i.e., give an example of what
exactly broke? (Such that I could check the proposed solution at [1].)
Also, are there issues (regressions) on systems that *don't have* a
system-wide pkg-config installed at all?
-leif
[1] http://trac.sagemath.org/ticket/16274
Of course, I have to wonder what other components of Sage got built
incorrectly due to Sage's pkg-config returning misleading results
(e.g., saying that a system-wide library isn't available even though
it is)...
William
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