Re: [boost] [test] como doesn't like #warning

From: Angus Leeming (angus.leeming_at_[hidden])
Date: 2005-12-19 07:08:32

Markus Schöpflin wrote:

> Angus Leeming wrote:
> 
>> Something like:
>> 
>> #ifdef BOOST_PP_HAS_WARNINGS
>> #warning foo bar
>> #endif
>> 
>> where BOOST_PP_HAS_WARNINGS is defined in boost/config/compiler/gcc.hpp
>> 
>> ?
>> 
>> Or, given the proposed rewrite of the config stuff have the macro
>> defined to 0 for all compilers except gcc and use as #if
>> BOOST_PP_HAS_WARNINGS
> 
> I don't think this will help, because the preprocessor seems to scan the
> whole file.

Interesting. We've used that solution for ever with LyX and I never had a
problem with my (admittedly old) version of DEC's cxx. That machine is now
history however.

Presumably, therefore, the solution is to define BOOST_WARNING(text) which
expands to nothing with all compilers except gcc for which it expands to
#warning text.

Angus