[Pythonmac-SIG] MacOS X _POSIX_C_SOURCES and stuff

[Bill Northcott]

Not happy with the replies I received, I have ground this very small  
and think I now understand what is going on.

Try the following test program:
#define	_POSIX_C_SOURCE 200112L
#include <Carbon/carbon.h>
int main ()
{
}

Save it once as posix_test.c and again as posix_test.cpp.  Try to  
compile them:

[PM-G5BN:Shared/Public/Python] billn% gcc posix_test.c
[PM-G5BN:Shared/Public/Python] billn% gcc posix_test.cpp
In file included from /System/Library/Frameworks/ 
CoreServices.framework/Frameworks/CarbonCore.framework/Headers/ 
CarbonCore.h:65,
                  from /System/Library/Frameworks/ 
CoreServices.framework/Headers/CoreServices.h:21,
                  from /System/Library/Frameworks/Carbon.framework/ 
Headers/carbon.h:20,
                  from posix_test.cpp:3:
/System/Library/Frameworks/CoreServices.framework/Frameworks/ 
CarbonCore.framework/Headers/MacMemory.h: In
    function `void BlockZero(void*, long int)':
/System/Library/Frameworks/CoreServices.framework/Frameworks/ 
CarbonCore.framework/Headers/MacMemory.h:1585: error: `
    bzero' undeclared (first use this function)
/System/Library/Frameworks/CoreServices.framework/Frameworks/ 
CarbonCore.framework/Headers/MacMemory.h:1585: error: (Each
    undeclared identifier is reported only once for each function it  
appears
    in.)
In file included from /System/Library/Frameworks/ 
CoreServices.framework/Frameworks/CarbonCore.framework/Headers/ 
CarbonCore.h:161,
                  from /System/Library/Frameworks/ 
CoreServices.framework/Headers/CoreServices.h:21,
                  from /System/Library/Frameworks/Carbon.framework/ 
Headers/carbon.h:20,
                  from posix_test.cpp:3:
/System/Library/Frameworks/CoreServices.framework/Frameworks/ 
CarbonCore.framework/Headers/fp.h: In
    function `long double gammal(long double)':
/System/Library/Frameworks/CoreServices.framework/Frameworks/ 
CarbonCore.framework/Headers/fp.h:2031: error: `
    gamma' undeclared (first use this function)
/System/Library/Frameworks/CoreServices.framework/Frameworks/ 
CarbonCore.framework/Headers/fp.h: In
    function `long int rinttoll(long double)':
/System/Library/Frameworks/CoreServices.framework/Frameworks/ 
CarbonCore.framework/Headers/fp.h:2145: error: `
    rinttol' undeclared (first use this function)
/System/Library/Frameworks/CoreServices.framework/Frameworks/ 
CarbonCore.framework/Headers/fp.h: In
    function `long int roundtoll(long double)':
/System/Library/Frameworks/CoreServices.framework/Frameworks/ 
CarbonCore.framework/Headers/fp.h:2183: error: `
    roundtol' undeclared (first use this function)
[PM-G5BN:Shared/Public/Python] billn%

The POSIX specifications only cover C not C++.  It is nonsense to  
define _POSIX_C_SOURCE or _XOPEN_SOURCE in a C++ program.  So it  
seems to me that the correct fix for the problems is not to to drop  
the _POSIX_C_SOURCE and _XOPEN_SOURCE definitions.  That is throwing  
the baby out with the bathwater.  The right approach is to wrap them  
in '#if !defined(__cplusplus).

Nothing I have seen so far provides any evidence to contradict  
Apple's assertion that Tiger is POSIX compliant.

Cheers
Bill Northcott