Re: [boost] [integer] long long warning

Subject: Re: [boost] [integer] long long warning
From: John Maddock (john_at_[hidden])
Date: 2009-11-10 04:48:39

> if, in SVN trunk as of revision 57535, I go to libs/program_options/test
> and run:
>
> bjam warnings=all cxxflags=-Wextra
>
> I get a pile of warnings like this:
>
> ../../../boost/integer.hpp:145:24: warning: use of C99 long long integer 
> constant
>
> These are actually only warnings that are now printed. Does anybody know 
> what
> to do with them?

Not yet, but it hits my stuff as well, so sometime I want to see it fixed. 
BTW I believe there are quite a few changes to Boost.Integer in Trunk that 
have never been merged to release as well, which adds extra complications 
:-(

Looking at the code in question, it appears the warning is from the 
preprocessor phase as the line in question reads:

#if BOOST_HAS_XINT && (BOOST_UXINT_MAX > ULONG_MAX)

So we can't just declare constants-as-variables in one place to fix this as 
we need values usable in preprocessor directives.  Looks like we'll need 
another #pragma GCC system_header, and as suggested elsewhere I'll try and 
add a way to turn off those pragmas in Boost.Config.

HTH, John.

PS don't let warnings in dependencies stop you from declaring the library 
"clean" on https://svn.boost.org/trac/boost/wiki/WarningFixes, it's 
understood that dependencies may cause warnings, but they'll get fixed at 
some point if we all work through the list.