[Boost-bugs] [Boost C++ Libraries] #11833: Boost usage of __int128 when compiled with clang-cl

Subject: [Boost-bugs] [Boost C++ Libraries] #11833: Boost usage of __int128 when compiled with clang-cl
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2015-12-07 21:55:48

#11833: Boost usage of __int128 when compiled with clang-cl
-----------------------------------------+-------------------------
 Reporter:  Yaron Keren <yaron.keren@…>  |      Owner:  johnmaddock
     Type:  Bugs                         |     Status:  new
Milestone:  To Be Determined             |  Component:  config
  Version:  Boost 1.59.0                 |   Severity:  Problem
 Keywords:                               |
-----------------------------------------+-------------------------
 Boost compiled with clang-cl targetting MSVC toolchain should not probably
 use __int128 as the support functions __umodti3 and friends, usually
 available from libgcc are not available from the MSVC libs leading to
 error LNK2019: unresolved external symbol __umodti3.

 This may be solved either by using compiler-rt along with the MSVC libs or
 by not defining BOOST_HAS_INT128 in clang.hpp:

 #if defined(__SIZEOF_INT128__) && !defined(__CUDACC__) &&
 !defined(_MSC_VER)
 #  define BOOST_HAS_INT128
 #endif

 I'm not sure which is the right way to go here, but this should be at
 least be documented.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/11833>
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