#12315: OS X Lion: pari fails self tests
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Reporter: jhpalmieri | Owner: tbd
Type: defect | Status: needs_review
Priority: major | Milestone: sage-5.0
Component: packages | Keywords: pari darwin lion osx
Work_issues: | Upstream: N/A
Reviewer: | Author:
Merged: | Dependencies:
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Changes (by jhpalmieri):
* status: new => needs_review
Old description:
> On OS X Lion, if you set SAGE_CHECK=yes and build pari, some tests fail.
> See
>
> [http://sage.math.washington.edu/home/palmieri/misc/pari-2.5.0.p3.log]
>
> for a log file.
New description:
On OS X Lion, if you set SAGE_CHECK=yes and build pari, some tests fail.
See
[http://sage.math.washington.edu/home/palmieri/misc/pari-2.5.0.p3.log]
for a log file.
----
New spkg:
[http://sage.math.washington.edu/home/palmieri/SPKG/pari-2.5.1.p0.spkg]
--
Comment:
Okay, nailed it. On OS X Lion, 'gcc' is a symbolic link to '/usr/bin
/llvm-gcc-4.2', but '/usr/bin/gcc-4.2' is a plain version of gcc. So if,
when building Pari, we do `export CC=gcc-4.2`, then self-tests pass when
building with standard (`-O3`) optimization. So we have an easy solution,
but it leads to several questions:
- Is the version of OS X (Lion vs. Snow Leopard) important, or is it only
the version of XCode? That is, should we just test whether 'LLVM' is in
the output from `gcc --version` (or perhaps something more refined, like
'LLVM' is in the output from `gcc --version` and gcc is version 4.2.1, or
`gcc --version` contains the string "LLVM build 2.335.15.00")?
- Should we make this change only for Pari, or should we do this when
building all of Sage? I have a feeling we do it on a case-by-case basis,
since I think that not all spkgs respect the CC variable. I tried it with
cvxopt (see #12011), and it didn't seem to help, but it's worth exploring
more...
I've posted an spkg which tests whether we're using an 'LLVM' version of
gcc 4.2.1.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/12315#comment:12>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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