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Subject: Re: [Boost-users] boost 1.47: gcc file dependency generation trips over BOOST_PARAMETER_MAX_ARITY
From: Ytsen de Boer (yrdeboer_at_[hidden])
Date: 2011-09-15 08:33:57

  Thanks for your answer.
  You make a good point about the different preprocessor definitions,
I agree that they should be the same to those used at compile time.
  Thanks for your time.
  All the best,


2011/9/15 Ivan Le Lann <ivan.lelann_at_[hidden]>:
> ----- "Ytsen de Boer" <yrdeboer_at_[hidden]> a écrit :
>> Thank you for your answer.
>>   I believe we are not on the same page.
>>   Obviously, when I define the max arity to a value of 7 or more, the
>> preprocessor will finish properly.
>>   But the point I am trying to make is more subtle, namely, that the
>> generation of the project dependencies has not a thing to do with the
>> boost max arity.
> I think it does actually.
> How could gcc track inclusions without preprocessing ?
> #ifdef USE_LIB_A
> #  include "a.h"
> #else
> #  include "b.h"
> #endif
> It seems very dangerous to me to use "-MMD" with different
> preprocessor definitions than at real compile time.
> But I'm not an expert.
> Anyway :
>>   I don't know what the boost max arity means or what its for, but it
>> seems to me that it is a run time variable.
> Have you checked that ?
> My guess is that it is a compile time variable controlling
> the number of template arguments for a particular class or function.
> Pure compile time.
> Regards,
> Ivan
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