[Python-Dev] Compiling 2.7.2 on OS/2

Fri Jan 6 00:55:58 CET 2012

On 1/5/2012 3:01 PM, Paul Smedley wrote:
>> File "./setup.py", line 1154, in detect_modules
>> for arg in sysconfig.get_config_var("__CONFIG_ARGS").split()]
>> AttributeError: 'NoneType' object has no attribute 'split'
>> make: *** [sharedmods] Error 1

> File "./setup.py", line 1368, in detect_modules
> if '--with-system-expat' in sysconfig.get_config_var("CONFIG_ARGS"):
> TypeError: argument of type 'NoneType' is not iterable
> make: *** [sharedmods] Error 1
>> Which again points to problems with
> sysconfig.get_config_var("CONFIG_ARGS"):

[The earlier call was with "__CONFIG_ARGS", for whatever difference that 
makes.] It appears to be returning None instead of [] (or a populated list).
In 3.2.2, at line 579 of sysconfig.py is
def get_config_var(name):
 return get_config_vars().get(name)
That defaults to None if name is not a key in the dict returned by 
get_config_vars(). My guess is that it always is and and the the value 
is always a list for tested win/*nix/mac systems. So either setup.py has 
the bug of assuming that there is always a list value for "CONFIG_ARGS" 
or sysconfig.py has the bug of not setting it for os2, perhaps because 
of a bug elsewhere.
At line 440 of sysconfig.py is
def get_config_var(*args):
 global _CONFIG_VARS
 if _CONFIG_VARS is None:
 _CONFIG_VARS = {}
 <code to populate _CONFIG_VARS, including>
 if os.name in ('nt', 'os2'):
 _init_non_posix(_CONFIG_VARS)
 if args:
 vals = []
 for name in args:
 vals.append(_CONFIG_VARS.get(name))
 return vals
 else:
 return _CONFIG_VARS
At 456 is
def _init_non_posix(vars):
 """Initialize the module as appropriate for NT"""
 # set basic install directories
 ...
"CONFIG_ARGS" is not set explicitly for any system anywhere in the file, 
so I do not know how the call ever works.
-- 
Terry Jan Reedy