Hi,

A major blocker for Sage-5.0 is supporting OS X (version 10.7 -- the
version that has been out for months now).

Fortunately, it is now "relatively easy" to build sage-5.0.beta1 on OS
X 10.7 with XCode 4.x, and have it start up.

(1) Build [1] as usual.
(2) Apply Simon's patch trac11900_fix_singleton_hash.patch  from #11900 [2].
(3) Fix the static Python library problem:
$ cd SAGE_ROOT
$ rm local/lib/python2.7/config/libpython2.7.a
$ cp local/lib/libpython2.7.dylib local/lib/python2.7/config/
$ ./sage -f spkg/standard/pynac-0.2.3.p0.spkg
$ ./sage -ba

I expect there will be numerous subtle test failures though, just as
there were two months ago when John Palmieri built Sage on 10.7 and
ran the test suite.    I'll post later about this.

[1] http://sage.math.washington.edu/home/release/sage-5.0.beta1/
[2] http://trac.sagemath.org/sage_trac/ticket/11900
 -- William

-- 
William Stein
Professor of Mathematics
University of Washington
http://wstein.org

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