[boost] Apple GCC conditional in boost.python ??

From: Marshall Clow (marshall_at_[hidden])
Date: 2005-02-20 22:57:39

In boost/libs/python/src/converter/registry.cpp, I found:

>#if defined(__APPLE__) && defined(__MACH__) && defined(__GNUC__) \
>  && __GNUC__ == 3 && __GNUC_MINOR__ <= 4 && !defined(__APPLE_CC__)
># define BOOST_PYTHON_CONVERTER_REGISTRY_APPLE_MACH_WORKAROUND
>#endif

I have no idea what defining that big long symbol does, but I think 
that the conditionals
are incorrect.

<http://developer.apple.com/technotes/tn2002/tn2071.html> says:
        __APPLE__	This macro is defined in any Apple computer.
        __MACH__	This macro is defined if Mach system calls 
are supported.
        __APPLE_CC__	This macro is set to an integer that 
represents the version number of the compiler. This lets you 
distinguish, for example, between compilers based on the same version 
of GCC, but with different bug fixes or features. Larger values 
denote later compilers.

I can't see any case where __APPLE__ and __GNUC__ are defined, and 
__APPLE_CC__ is not defined.

Metrowerks?	==> No __GNUC__
Not on a Mac?	==> No __APPLE__

__APPLE_CC__  was defined for Apple-released versions of GCC, 
starting with 2.95.2 (so says Chris Espinosa at Apple). More 
historical info is at 
<http://developer.apple.com/releasenotes/DeveloperTools/GCC2.html>

So, I think that that whole #if expression always evaluates to "false".
-- 
-- Marshall
Marshall Clow     Idio Software   <mailto:marshall_at_[hidden]>
It is by caffeine alone I set my mind in motion.
It is by the beans of Java that thoughts acquire speed,
the hands acquire shaking, the shaking becomes a warning.
It is by caffeine alone I set my mind in motion.