Ooh, here's a yucky problem. Last night, I installed Oliver Andrich's
Python 1.5.2 RPM on my Linux box at home, so now I have two Python
installations there:
* my build, in /usr/local/python and /usr/local/python.i86-linux
(I need to test Distutils in the prefix != exec_prefix case)
* Oliver's RPM, in /usr
I have a symlink /usr/local/bin/python pointing to
../../python.i86-linux/bin/python, and /usr/local/bin is first in my
path:
$ ls -lF `which python`
lrwxrwxrwx 1 root root 30 Aug 28 1999 /usr/local/bin/python -> ../python.i86-linux/bin/python*
Since I installed the RPM, /usr/local/bin/python reports an incorrect
prefix:
$ /usr/local/bin/python
Python 1.5.2 (#1, Jun 20 1999, 19:56:42) [GCC 2.7.2.3] on linux2
Copyright 1991-1995 Stichting Mathematisch Centrum, Amsterdam
>>> import sys ; sys.prefix, sys.exec_prefix
('/usr', '/usr/local/bin/../python.i86-linux')
Essentially the same thing if I run it directly, not through the
symlink:
$ /usr/local/python.i86-linux/bin/python
Python 1.5.2 (#1, Jun 20 1999, 19:56:42) [GCC 2.7.2.3] on linux2
Copyright 1991-1995 Stichting Mathematisch Centrum, Amsterdam
>>> import sys ; sys.prefix, sys.exec_prefix
('/usr', '/usr/local/python.i86-linux')
/usr/bin/python gets it right, though:
$ /usr/bin/python
Python 1.5.2 (#1, Apr 18 1999, 16:03:16) [GCC pgcc-2.91.60 19981201
(egcs-1.1.1 on linux2
Copyright 1991-1995 Stichting Mathematisch Centrum, Amsterdam
>>> import sys ; sys.prefix, sys.exec_prefix
('/usr', '/usr')
This strikes me as a pretty reasonable and straightforward way to have
multiple Python installations; if Python is fooled into getting the
wrong sys.prefix, then the Distutils are going to have a much tougher
job! Don't tell me I have to write my own prefix-finding code now...
(And no, I have not tried this under 1.6 yet.)
Damn and blast my last-minute pre-release testing... I should have just
released the bloody thing and let the bugs fly. Oh hell, I think I will
anyways.
Greg
--
Greg Ward - software developer gward@mems-exchange.org
MEMS Exchange / CNRI voice: +1-703-262-5376
Reston, Virginia, USA fax: +1-703-262-5367
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