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sage install error

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Bruce Meier — 1336425298Mon, 07 May 2012 21:14:58 +0000 (UTC) 
Freebsd 8.2 release

processor amd64

#more start.log
[2012-05-07 01:11:58] Sage version 4.8, released 2012-01-20
Setting permissions of DOT_SAGE directory so only you can read and write it.
Traceback (most recent call last):
   File "/usr/ports/math/sage/work/sage-4.8/local/bin/sage-eval", line 
4, in <module>
     from sage.all import *
   File 
"/usr/ports/math/sage/work/sage-4.8/local/lib/python2.6/site-packages/sage/all.py", 
line 78, in <module>
     import sage.symbolic.pynac
   File "expression.pxd", line 6, in init sage.symbolic.pynac 
(sage/symbolic/pynac.cpp:19189)
   File "expression.pyx", line 145, in init sage.symbolic.expression 
(sage/symbolic/expression.cpp:35722)
   File "function.pyx", line 31, in init sage.symbolic.function 
(sage/symbolic/function.cpp:11736)
ImportError: 
/usr/ports/math/sage/work/sage-4.8/local/lib/python2.6/site-packages/sage/ext/fast_eval.so: 
Undefined symbol "log2"
[2012-05-07 08:23:04] Sage version 4.8, released 2012-01-20
Traceback (most recent call last):
   File "/usr/ports/math/sage/work/sage-4.8/local/bin/sage-eval", line 
4, in <module>
     from sage.all import *
   File 
"/usr/ports/math/sage/work/sage-4.8/local/lib/python2.6/site-packages/sage/all.py", 
line 78, in <module>
     import sage.symbolic.pynac
   File "expression.pxd", line 6, in init sage.symbolic.pynac 
(sage/symbolic/pynac.cpp:19189)
   File "expression.pyx", line 145, in init sage.symbolic.expression 
(sage/symbolic/expression.cpp:35722)
   File "function.pyx", line 31, in init sage.symbolic.function 
(sage/symbolic/function.cpp:11736)
ImportError: 
/usr/ports/math/sage/work/sage-4.8/local/lib/python2.6/site-packages/sage/ext/fast_eval.so: 
Undefined symbol "log2"
Stephen Montgomery-Smith — 1336438935Tue, 08 May 2012 01:02:15 +0000 (UTC) 
On 05/07/2012 04:14 PM, Bruce Meier wrote:
> Freebsd 8.2 release
>
> processor amd64
>
> #more start.log
> [2012-05-07 01:11:58] Sage version 4.8, released 2012-01-20
> Setting permissions of DOT_SAGE directory so only you can read and write
> it.
> Traceback (most recent call last):
> File "/usr/ports/math/sage/work/sage-4.8/local/bin/sage-eval", line 4,
> in <module>
> from sage.all import *
> File
> "/usr/ports/math/sage/work/sage-4.8/local/lib/python2.6/site-packages/sage/all.py",
> line 78, in <module>
> import sage.symbolic.pynac
> File "expression.pxd", line 6, in init sage.symbolic.pynac
> (sage/symbolic/pynac.cpp:19189)
> File "expression.pyx", line 145, in init sage.symbolic.expression
> (sage/symbolic/expression.cpp:35722)
> File "function.pyx", line 31, in init sage.symbolic.function
> (sage/symbolic/function.cpp:11736)
> ImportError:
> /usr/ports/math/sage/work/sage-4.8/local/lib/python2.6/site-packages/sage/ext/fast_eval.so:
> Undefined symbol "log2"
> [2012-05-07 08:23:04] Sage version 4.8, released 2012-01-20
> Traceback (most recent call last):
> File "/usr/ports/math/sage/work/sage-4.8/local/bin/sage-eval", line 4,
> in <module>
> from sage.all import *
> File
> "/usr/ports/math/sage/work/sage-4.8/local/lib/python2.6/site-packages/sage/all.py",
> line 78, in <module>
> import sage.symbolic.pynac
> File "expression.pxd", line 6, in init sage.symbolic.pynac
> (sage/symbolic/pynac.cpp:19189)
> File "expression.pyx", line 145, in init sage.symbolic.expression
> (sage/symbolic/expression.cpp:35722)
> File "function.pyx", line 31, in init sage.symbolic.function
> (sage/symbolic/function.cpp:11736)
> ImportError:
> /usr/ports/math/sage/work/sage-4.8/local/lib/python2.6/site-packages/sage/ext/fast_eval.so:
> Undefined symbol "log2"
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I am happy to work with you as hard as I can to resolve this issue, but 
I am mystified.  I created the sage port on the amd64 using 
FreeBSD-Stable-8.2, which is almost identical to what you have.

Somehow python is not finding the libm library, which is where log2 is 
defined.
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