New submission from Samuel John:
In the `_osx_support.py` module, there seems to be a bug in the method
`compiler_fixup` which occurs if
* the `customize_compiler` method from `distutils/sysconfig` has been called
and after that
* `_compile` from `distutils/unixcompiler.py` is called. The `_compile` method
uses `_osx_support.compiler_fixup`.
The critical line in compiler_fixup is:
`compiler_so = list(compiler_so)`.
Usually `compiler_so` is a list like `['cc']` but not when `customize_compiler`
(from sysconfig) has been called. The value returned by
`sysconfig.get_config_var('LDSHARED')` is a unicode like for example in the
case of a Python 2.7.5 built via Homebrew:
"cc -bundle -undefined dynamic_lookup -L/homebrew/lib
-L/homebrew/opt/sqlite/lib -isysroot
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.8.sdk".
When `list()` is applied to the value, it is split at each character and that
cannot be intended.
I am not sure if I fully understand, but to fix this in `compiler_fixup`,
instead of `compiler_so = list(compiler_so)`, I'd propose something along the
lines of:
if isinstance(compiler_so, (str,unicode)):
compiler_so = compiler_so.split()
I found this by trying to `pip install cython` (it uses customize_compiler, I
guess) on a homebrewed python.
To reproduce in an interactive shell we can emulate what is going on by calling
`compiler_fixup` directly with the values sysconfig has stored. The exact
string does not matter, because I think the any value returned by
`sysconfig_get_config_var` is a (unicode) string and not a list:
import sysconfig
import _osx_support
_osx_support.compiler_fixup(sysconfig.get_config_var('LDSHARED'),sysconfig.get_config_var('CFLAGS'))
Not sure if other python versions are affected. I wasn't aware of
`_osx_support` at all until now.
----------
assignee: ronaldoussoren
components: Macintosh
messages: 190140
nosy: hynek, ned.deily, ronaldoussoren, samueljohn
priority: normal
severity: normal
status: open
title: _osx_support compiler_fixup
versions: Python 2.7
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Python tracker <[email protected]>
<http://bugs.python.org/issue18071>
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