[Boost-bugs] [Boost C++ Libraries] #10994: Using boost::atomic for 128-bit type results in build error with GCC 4.4

Subject: [Boost-bugs] [Boost C++ Libraries] #10994: Using boost::atomic for 128-bit type results in build error with GCC 4.4
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2015-02-04 10:40:36


#10994: Using boost::atomic for 128-bit type results in build error with GCC 4.4
-----------------------------------------+--------------------------
 Reporter: Martin Srom <srom.martin@…> | Owner: timblechmann
     Type: Bugs | Status: new
Milestone: To Be Determined | Component: atomic
  Version: Boost 1.57.0 | Severity: Problem
 Keywords: |
-----------------------------------------+--------------------------
 When using boost::atomic with 128-bit type it results into a build error
 with GCC 4.4.

 With GCC 4.6 it works fine.
 With 64-bit type it works fine.

 Minimal example:

 '''main.cpp''':
 {{{
 #include <boost/atomic.hpp>

 int main()
 {
     boost::atomic<__int128_t> variable(0);
     variable.load();
 }
 }}}

 '''Build command''':
 {{{
 g++-4.4 -O3 -mcx16 main.cpp -Iboost_1_57_0/
 }}}

 '''Error output''':
 {{{
 boost_1_57_0/boost/atomic/detail/ops_gcc_x86_dcas.hpp: In function ‘int
 main()’:
 boost_1_57_0/boost/atomic/detail/ops_gcc_x86_dcas.hpp:261: error:
 impossible constraint in ‘asm’
 }}}

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/10994>
Boost C++ Libraries <http://www.boost.org/>
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