Bugs item #1105699, was opened at 2005-01-20 01:52
Message generated for change (Comment added) made by loewis
You can respond by visiting:
https://sourceforge.net/tracker/?func=detail&atid=105470&aid=1105699&group_id=5470
Category: Build
>Group: 3rd Party
>Status: Closed
>Resolution: Invalid
Priority: 5
Submitted By: Bob Ippolito (etrepum)
Assigned to: Nobody/Anonymous (nobody)
Summary: Warnings in Python.h with gcc 4.0.0
Initial Comment:
(this happens for every file that includes Python.h)
In file included from ../Include/Python.h:55,
from ../Objects/intobject.c:4:
../Include/pyport.h:396: warning: 'struct winsize' declared inside
parameter list
../Include/pyport.h:397: warning: 'struct winsize' declared inside
parameter list
The source lines look like this:
extern int openpty(int *, int *, char *, struct termios *, struct
winsize *);
extern int forkpty(int *, char *, struct termios *, struct winsize *);
----------------------------------------------------------------------
>Comment By: Martin v. Löwis (loewis)
Date: 2005-03-15 09:06
Message:
Logged In: YES
user_id=21627
Still, for the record: what operating system is this on?
I don't believe the analysis that this is a GCC bug, but I'm
willing to accept it <wink>. Closing this as third-party.
----------------------------------------------------------------------
Comment By: Bob Ippolito (etrepum)
Date: 2005-03-14 23:52
Message:
Logged In: YES
user_id=139309
Turns out that this is a GCC4 bug (not sure which, though). The OS
headers are fine.
----------------------------------------------------------------------
Comment By: Martin v. Löwis (loewis)
Date: 2005-03-04 21:15
Message:
Logged In: YES
user_id=21627
What operating system is this on? struct winsize should have
been included through <termios.h>. Then, the mentioning of
it in the propotypes is not a declaration, just a reference.
So if you get this warning, it probably indicates a problem
with your system headers.
----------------------------------------------------------------------
Comment By: Richard Kettlewell (rjk1002)
Date: 2005-01-31 16:43
Message:
Logged In: YES
user_id=217390
C does guarantee that all struct pointers share the same
*representation* (section 6.2.5 of C99). That's not what
the compiler is complaining about here.
Rather, a struct declared inside a parameter list is
restricted in scope to that parameter list, and so is not
the same structure as one declared outside it, even if the
tag is the same.
The solution is to forward-declare the struct (as an
incomplete type, i.e. just "struct winsize;") before any of
the declarations that use it. Then the struct tag will mean
the same thing in every scope.
----------------------------------------------------------------------
Comment By: Tim Peters (tim_one)
Date: 2005-01-21 00:13
Message:
Logged In: YES
user_id=31435
The warning almost certainly means that there's no
declaration of struct winsize in scope when these externs are
declared. That's bad, because C doesn't guarantee that all
pointers are the same size (although they are on all Python
platforms I'm aware of).
Some quality time with Google suggested that other projects
wormed around this by #include'ing <termio.h> instead of
<termios.h>, because the former but not the latter #include's
<sys/ioctl.h> where the winsize struct was defined. Beats
me -- ain't a Windows problem <wink>.
----------------------------------------------------------------------
Comment By: Bob Ippolito (etrepum)
Date: 2005-01-20 23:49
Message:
Logged In: YES
user_id=139309
Beats me, it's probably just "bad style".
It's a problem because it shows up a lot in the output, so we should at
least figure out how to disable this warning so that it doesn't become
annoying.
----------------------------------------------------------------------
Comment By: Michael Hudson (mwh)
Date: 2005-01-20 16:18
Message:
Logged In: YES
user_id=6656
Why is this a problem? Is it not valid C or something?
----------------------------------------------------------------------
You can respond by visiting:
https://sourceforge.net/tracker/?func=detail&atid=105470&aid=1105699&group_id=5470
_______________________________________________
Python-bugs-list mailing list
Unsubscribe:
http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
