Re: [Python-Dev] c99 comments in the 2.6 code base?

2008-10-02 Thread Christian Heimes

Fredrik Lundh wrote:

http://drj11.wordpress.com/2008/10/02/python-and-bragging-about-c89/

mentions that Objects/frameobject.c contains a C99-style comment, which 
means that Python 2.6 won't build on AIX.


shouldn't we use a suitable gcc option for the buildbots to prevent that 
from happening?


Ouch! This shouldn't have happend. I'm going to discuss the matter on 
#python-dev. Perhaps --with-pydebug could add more restrict error 
checking to the Makefile like -std=c89 -pedantic -Werror


Christian

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Re: [Python-Dev] c99 comments in the 2.6 code base?

2008-10-02 Thread Antoine Pitrou
Christian Heimes lists at cheimes.de writes:
 
 Ouch! This shouldn't have happend. I'm going to discuss the matter on 
 #python-dev. Perhaps --with-pydebug could add more restrict error 
 checking to the Makefile like -std=c89 -pedantic -Werror

As discussed on python-dev, I think it should also be added in release mode.
Some developers probably never compile in debug mode (*), and compiling in
release mode is useful when you want to do performance tuning.

(*) not thinking of anyone in particular !

Regards

Antoine.


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Re: [Python-Dev] c99 comments in the 2.6 code base?

2008-10-02 Thread Christian Heimes

Fredrik Lundh wrote:

http://drj11.wordpress.com/2008/10/02/python-and-bragging-about-c89/


I've found several more occasions of // comments and one usage of 
inline. We *really* should have some way to compile Python with C89 checks


Python doesn't compile with the -pedantic option but it compiles with 
-std=c89 -Werror after I've applied some patches. I've added a new make 
command to add extra checks. Maybe the build bots could use make c89 
instead of make to build Python?


c89:
$(MAKE) CFLAGS=$(CFLAGS) -std=c89 -Werror


Christian

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Re: [Python-Dev] c99 comments in the 2.6 code base?

2008-10-02 Thread Christian Heimes

Martin v. Löwis wrote:

shouldn't we use a suitable gcc option for the buildbots to prevent that
from happening?


Which one specifically?


I suggest we add -std=c89 to CFLAGS. We could also add a new target 
called buildbot to the Makefile that appends -std=c89 -Werror to 
CFLAGS. I don't think it's wise to add -Werror to the standard build 
target. However a new build target with extra checks should help to 
detect errors much sooner.


Christian
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Re: [Python-Dev] c99 comments in the 2.6 code base?

2008-10-02 Thread Martin v. Löwis
 shouldn't we use a suitable gcc option for the buildbots to prevent that
 from happening?

 Which one specifically?
 
 I suggest we add -std=c89 to CFLAGS.

That needs thorough testing, in particular across many old Linux
distributions. It might be that some sets of Linux header files
rely on GNU C extensions, without using the __extension__ keyword.

 We could also add a new target
 called buildbot to the Makefile that appends -std=c89 -Werror to
 CFLAGS. I don't think it's wise to add -Werror to the standard build
 target. However a new build target with extra checks should help to
 detect errors much sooner.

That would need to go along with a policy that Python must never cause
GCC to emit any warnings.

Regards,
Martin
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Re: [Python-Dev] c99 comments in the 2.6 code base?

2008-10-02 Thread skip

 shouldn't we use a suitable gcc option for the buildbots to prevent
 that from happening?
 
 Which one specifically?
 
 I suggest we add -std=c89 to CFLAGS.

Martin That needs thorough testing, in particular across many old Linux
Martin distributions. It might be that some sets of Linux header files
Martin rely on GNU C extensions, without using the __extension__
Martin keyword.

Surely we don't need to be that careful with the buildbots do we?  If
anything, I think it would be a good idea to be more strict for them than
the default.

Skip
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