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From: David Abrahams (dave_at_[hidden])
Date: 2007-05-04 20:41:57

on Wed May 02 2007, "Jonathan Franklin" <> wrote:

> On 5/2/07, David Abrahams <dave_at_[hidden]> wrote:...
>> > If you treat warnings as errors and if bjam has an option to "keep
>> > going" as much as possible, then you get builds as far as they can go
>> > (i.e. all the warnings) and builds fail if there are warnings. Then I
>> > think you don't need to depend on the regression reporting tools for the
>> > rest of time, atleast for this stuff.
>> It would take a lot to convince me to require that Boost builds with
>> all warnings enabled and treated as errors. There are just too many
>> "nuisance" warnings out there, and since GCC gives us no way to
>> explicitly suppress warnings in code, we'd have to write convoluted
>> (and sometimes even inefficient) code just to silence them.
> This is certainly the case with the MS compiler, who even at lower warning
> levels tends to make spurious comments about your code (not really warnings
> at all).

At least it gives me the #pragmas I need to silence them.

> However with gcc (and possibly other compilers), building w/ -Wall
> -Werror is tenable, and is usually the Right Thing. We have done
> this on the last several (extremely large) projects I have worked
> on.

In my experience it's the Right Thing for certain common coding
styles, but completely wrong for others. For example, GCC has a
warning about a derived class whose base doesn't have a virtual dtor.
It's actually *impossible* (not just inefficient or convoluted) to
implement is_polymorphic without generating that warning.

Dave Abrahams
Boost Consulting
Don't Miss BoostCon 2007! ==>

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