Re: [boost] Showstopper for Boost 1.56?

Subject: Re: [boost] Showstopper for Boost 1.56?
From: Niall Douglas (s_sourceforge_at_[hidden])
Date: 2014-07-30 12:03:38

On 30 Jul 2014 at 10:44, Edward Diener wrote:

> > Is anyone else seeing this warnings spew on Boost 1.56 beta when
> > compiled with clang 3.4?
> >
> > https://ci.nedprod.com/view/Boost.AFIO/job/Boost.AFIO%20Build%20POSIX_
> > Linux64_clang%203.4/11/consoleFull
> >
> > GCC 4.8 produces no such spew.
> 
> I cannot duplicate, using clang, the sort of excessive output in your 
> link above with the tests of the Boost PP library, or the tests in my 
> VMD library which exercise various Boost PP variadic macros pretty 
> extensively.

Others have also reported such spew, but not everyone. It might be a 
clang packaging thing.

> My clang command line options for the tests looks like:
> 
> "clang++" -c -x c++ -O0 -g -fno-inline -Wall -g -fPIC
> 
> Can you tell me what the clang command line in your AFIO tests in your 
> link above actually is ?

AFIO itself does not trigger any of the spew, as it does not use 
Preprocessor. Rather it is the dependent libraries such as Thread, 
Filesystem, ASIO, Test etc.

I did actually post this earlier, but as I have a SSH session open 
right now here it is again, this being an example from Boost.Test:

  "clang++" -c -x c++ -O0 -g -fno-inline -Wall -pedantic -g -pthread 
-fPIC  -DBOOST_ALL_NO_LIB=1 -DBOOST_TEST_DYN_LINK=1 -I"." -o 
"bin.v2/libs/test/build/clang-linux-3.4.2/debug/threading-multi/debug.
o" "libs/test/src/debug.cpp"

In file included from libs/test/src/debug.cpp:16:
In file included from ./boost/test/impl/debug.ipp:21:
In file included from ./boost/test/detail/global_typedef.hpp:18:
In file included from 
./boost/test/utils/basic_cstring/basic_cstring.hpp:21:
In file included from 
./boost/test/utils/basic_cstring/bcs_char_traits.hpp:22:
In file included from ./boost/type_traits/add_const.hpp:16:
In file included from 
./boost/type_traits/detail/type_trait_def.hpp:14:
In file included from 
./boost/type_traits/detail/template_arity_spec.hpp:12:
In file included from ./boost/mpl/aux_/preprocessor/params.hpp:46:
In file included from ./boost/preprocessor/repeat.hpp:15:
In file included from ./boost/preprocessor/repetition/repeat.hpp:21:
./boost/preprocessor/tuple/eat.hpp:23:26: warning: variadic macros 
are a C99 feature [-Wvariadic-macros]
#    define BOOST_PP_EAT(...)
                         ^
In file included from libs/test/src/debug.cpp:16:
In file included from ./boost/test/impl/debug.ipp:56:
In file included from ./boost/test/utils/class_properties.hpp:24:
In file included from ./boost/preprocessor/seq/for_each.hpp:20:
In file included from ./boost/preprocessor/tuple/elem.hpp:20:
In file included from 
./boost/preprocessor/facilities/overload.hpp:17:
./boost/preprocessor/variadic/size.hpp:25:40: warning: variadic 
macros are a C99 feature [-Wvariadic-macros]
#        define BOOST_PP_VARIADIC_SIZE(...) 
BOOST_PP_VARIADIC_SIZE_I(__VA_ARGS__, 64, 63, 62, 61, 60, 59, 58, 57, 
56, 55, 54, 53, 52, 51, 50, 49, 48, 47, 46, 45, 44, 43, 42, 41, 40, 
39, 38, 37, 36, 35, 34, 33, 32, 31, 30, 29, 28, 27, 26, 25, 24, 23, 
22, 21, 20, 19, 18, 17, 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 
3, 2, 1,)
                                       ^
./boost/preprocessor/variadic/size.hpp:27:354: warning: variadic 
macros are a C99 feature [-Wvariadic-macros]
#    define BOOST_PP_VARIADIC_SIZE_I(e0, e1, e2, e3, e4, e5, e6, e7, 
e8, e9, e10, e11, e12, e13, e14, e15, e16, e17, e18, e19, e20, e21, 
e22, e23, e24, e25, e26, e27, e28, e29, e30, e31, e32, e33, e34, e35, 
e36, e37, e38, e39, e40, e41, e42, e43, e44, e45, e46, e47, e48, e49, 
e50, e51, e52, e53, e54, e55, e56, e57, e58, e59, e60, e61, e62, e63, 
size, ...) size
                                                       

I have set it running to generate a complete set of spew with how 
clang++ was called so you can nail all the occasions with #pragma. 
It's only a wee ARM board, so it will take a while as there are a few 
hundred Mb of stuff. Once done I'll upload it to Google Drive and 
post the link here.

Niall

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