[LLVMdev] [3.5 Release] Release Candidate 4 Now Available

[Larry Evans]

On 08/28/2014 02:07 PM, Bill Wendling wrote:
> We had to roll a release candidate 4 for the 3.5 release. It’s up at the normal place:
> 
> 	http://llvm.org/pre-releases/3.5
> 
> Please test it and report any major bugs you may find.
> 
> Thanks!
> -bw
> 
I tried to use libcxxabi, as downloaded from:

http://llvm.org/pre-releases/3.5/rc4/libcxxabi-3.5.0rc4.src.tar.xz

However, on my system:

~/dwnlds/llvm/3.5/rc4 $ uname -a
Linux lje-OptiPlex-9020 3.13.0-35-generic #62-Ubuntu SMP Fri Aug 15
01:58:42 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux

after doing cmake then make, getting some error about missing __sync_swap:


[ 11%] make[3]: Leaving directory
`/home/evansl/dwnlds/llvm/3.5/rc4/build-variants/Release/cmake-build'
Building C object
projects/compiler-rt/lib/builtins/CMakeFiles/clang_rt.builtins-x86_64.dir/absvti2.c.o
make[3]: Entering directory
`/home/evansl/dwnlds/llvm/3.5/rc4/build-variants/Release/cmake-build'
/home/evansl/dwnlds/llvm/3.5/rc4/sources/llvm-3.5.0rc4.src/projects/libcxxabi/src/cxa_default_handlers.cpp:
In function ‘void (* std::set_unexpected(std::unexpected_handler))()’:
/home/evansl/dwnlds/llvm/3.5/rc4/sources/llvm-3.5.0rc4.src/projects/libcxxabi/src/cxa_default_handlers.cpp:106:52:
error: ‘__sync_swap’ was not declared in this scope
  return __sync_swap(&__cxa_unexpected_handler, func);
                                                    ^
Also, later getting warning about exception_ptr:

[ 13%] Building CXX object
projects/libcxx/lib/CMakeFiles/cxx.dir/__/src/exception.cpp.o
[ 13%] Building C object
projects/compiler-rt/lib/builtins/CMakeFiles/clang_rt.builtins-x86_64.dir/ffsdi2.c.o
/home/evansl/dwnlds/llvm/3.5/rc4/sources/llvm-3.5.0rc4.src/projects/libcxx/src/exception.cpp:118:9:
warning: #warning is a GCC extension [enabled by default]
 #       warning uncaught_exception not yet implemented
         ^
/home/evansl/dwnlds/llvm/3.5/rc4/sources/llvm-3.5.0rc4.src/projects/libcxx/src/exception.cpp:118:9:
warning: #warning uncaught_exception not yet implemented [-Wcpp]


Is the __sync_swap error related to the subject of this post:

http://lists.cs.uiuc.edu/pipermail/cfe-dev/2014-May/036861.html

, and therefore, should the code in the downloaded
libcxxabi-3.5.0rc4.src.tar.xz be updated?  Also, should I worry
about the warnings?

TIA.

-regards,
Larry