Re: [Boost-users] [1.53.0] Beta release candidates 2 now available for testing

On Jan 4, 2013, at 11:25 AM, Marshall Clow wrote:

Updated release candidate files for 1.53.0 beta 1 are available at http://boost.cowic.de/rc/

As always, the release managers would appreciate it if you download the candidate of your choice and give building it a try. Please report both success and failure, and anything else that is noteworthy.

I built the RC on Mac OS X with both clang and gcc w/o errors. However, when I built using clang and libc++ in C++11 mode, I found two problems: ./b2 toolset=clang cxxflags="-std=c++11 -stdlib=libc++ -Wno-unused-variable" linkflags="-stdlib=libc++" Issue #1:

clang-darwin.compile.c++ bin.v2/libs/chrono/build/clang-darwin-11/release/threading-multi/chrono.o In file included from libs/chrono/src/chrono.cpp:14: In file included from ./boost/chrono/detail/inlined/chrono.hpp:13: In file included from ./boost/chrono/chrono.hpp:11: ./boost/chrono/duration.hpp:353:49: error: constexpr function never produces a constant expression static BOOST_CHRONO_LIB_CONSTEXPR float lowest() BOOST_CHRONO_LIB_NOEXCEPT_OR_THROW ^ ./boost/chrono/duration.hpp:355:21: note: non-constexpr function 'max' cannot be used in a constant expression return -(std::numeric_limits<float>::max) (); ^ /usr/bin/../lib/c++/v1/limits:443:43: note: declared here _LIBCPP_INLINE_VISIBILITY static type max() _NOEXCEPT {return __base::max();} ^

This is a bug in libc++; std::numeric_limits<>::max() is not marked as constexpr. This has been fixed in the libc++ trunk, and should appear in the next clang/libc++ release. Issue #2:

clang-darwin.compile.c++ bin.v2/libs/filesystem/build/clang-darwin-11/release/threading-multi/path.o In file included from libs/filesystem/src/path.cpp:39: In file included from ./boost/filesystem/detail/utf8_codecvt_facet.hpp:18: ./boost/detail/utf8_codecvt_facet.hpp:171:17: warning: 'boost::filesystem::detail::utf8_codecvt_facet::do_length' hides overloaded virtual function [-Woverloaded-virtual] virtual int do_length( ^ /usr/bin/../lib/c++/v1/__locale:920:17: note: hidden overloaded virtual function 'std::__1::codecvt::do_length' declared here virtual int do_length(state_type&, const extern_type* __frm, const extern_type* __end, size_t __mx) const; ^

This is my fault - there's a change that I failed to merge. I will fix this before the release. -- Marshall