[Pythonmac-SIG] Python 2.2 Framework _REENTRANT

[Jack Jansen]

You should probably compile without preprocessed headers (sorry, not
behind my OSX machine right now so I don't know the exact command line
switch).

The problem is that Python needs the _REENTRANT macro defined (for the
reason stated in pyconfig.h, so that you get thread-safe errno and
such), but that the set of precompile headers supplied by Apple was
generated with it undefined. This is a general problem with
precompiled headers: they only work if you don't use any special
switches.

Recently, Adam Eijdenberg <adam@switchedonsoftware.com> said:
> Hi,
> 
> I'm developing a Mach-O Carbon application that embeds Python and I'm 
> getting a few funny warnings when I try to compile it.
> 
> I've installed the Unix version of Python with the commands "./configure 
> --enable-framework && make && make framework" install as per 
> documentation and that all seems to work fine.
> 
> But when I compile my application with:
> cc *.c -framework Carbon -framework Python
> 
> I get the following warnings: (widget.h is one of my files, line 6 
> #includes <Python/Python.h>)
> 
> widget.h:6: warning: could not use precompiled header 
> '/System/Library/Frameworks/Carbon.framework/Headers/Carbon.p', because:
> widget.h:6: warning: #ifdef '_REENTRANT' not defined when precompiled, 
> but now defined:
> widget.h:6: warning:   at 
> /Library/Frameworks/Python.framework/Headers/pyconfig.h:208
> 
> Lines 207 and 208 in pyconfig.h are:
> 
> /* Define to force use of thread-safe errno, h_errno, and other 
> functions */
> #define _REENTRANT 1
> 
> Commenting out this line removes all warnings.
> 
> Everything seems to work fine, but could commenting this line out cause 
> any problems?
> 
> Kind regards,
> Adam Eijdenberg
> 
> Switched on Software
> adam@switchedonsoftware.com
> 
> 
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> 
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