Subject: Re: [boost] lots of warning with gcc-4.8.1 + boost-1.54.0
From: Nathan Ridge (zeratul976_at_[hidden])
Date: 2013-07-03 05:09:24
> On 3 July 2013 02:41, Nathan Ridge wrote:
>>> Lots of warnings like this:
>>> ./boost/bind/arg.hpp:37:22: warning: typedef T_must_be_placeholder locally
>>> defined but not used [-Wunused-local-typedefs]
>>> when building 1.54.0 with gcc-4.8.1 (fedora f19)
>> This warning is new in GCC 4.8, and I have been seeing a ton of them
>> not just in boost, but in every codebase I've built.
> It was new in GCC 4.7, http://gcc.gnu.org/gcc-4.7/changes.html
I stand corrected. (What's new in 4.8 is it being included in -Wall,
which is why I never noticed it in 4.7).
> It affects Boost more than most code because of the prevalent use of
> concept checks and static assertions which are usually implemented
> using typedefs but only conditionally compiled.
I've seen spews of that warning for other large projects, such as
clang or wxWidgets, not just boost.
Would GCC consider removing it from -Wall?
>> CC'ing the gcc folks.
> That's not very helpful because posting to the Boost list is
> subscription only (you'll have two copies of this mail, because the
> first one I sent from an address subscribed to the GCC list but not
> this one.)
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