[Boost-bugs] [Boost C++ Libraries] #11239: clang++ emits lots of warnings about unused local defines

Subject: [Boost-bugs] [Boost C++ Libraries] #11239: clang++ emits lots of warnings about unused local defines
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2015-04-24 20:32:20

#11239: clang++ emits lots of warnings about unused local defines
--------------------------------------+------------------------------
 Reporter:  Moritz Bunkus <moritz@…>  |       Type:  Bugs
   Status:  new                       |  Milestone:  To Be Determined
Component:  None                      |    Version:  Boost 1.58.0
 Severity:  Regression                |   Keywords:
--------------------------------------+------------------------------
 When compiling anything using `BOOST_RANGE_CONCEPT_ASSERT()` cland++ emits
 tons of warnings about used local defines with `-Wall`.

 This is a regression compared to 1.57.0.

 Trivial example program:

 {{{
 #include <vector>
 #include <boost/range/algorithm.hpp>

 int
 main(int, char**) {
   std::vector<int> v;
   boost::range::sort(v);
 }
 }}}

 Compiled with:

 {{{
 clang++ -Wall -I$HOME/opt/boost/boost_1_58_0/include/ \
   -L$HOME/opt/boost/boost_1_58_0/lib/ -o cpp1 cpp1.cpp
 }}}

 Output (excerpt):

 {{{
 In file included from cpp1.cpp:46:
 In file included from
 /home/mosu/opt/boost/boost_1_58_0/include/boost/range/algorithm.hpp:29:
 In file included from
 /home/mosu/opt/boost/boost_1_58_0/include/boost/range/concepts.hpp:19:
 /home/mosu/opt/boost/boost_1_58_0/include/boost/concept_check.hpp:51:7:
 warning: unused typedef 'boost_concept_check51' [-Wunused-local-typedef]
       BOOST_CONCEPT_ASSERT((Model));
 …
 313 warnings generated.
 }}}

 These are 313 warnings for that trivial example program above.

 g++ 4.9.2 does not emit such warnings, with neither version.

 clang++ 3.6.0 emits those warnings with Boost 1.58.0 but not with 1.57.0
 or earlier.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/11239>
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