[Llvm-bgq-discuss] Does bgclang++11 implement thread_local

[Patrick E Gartung]

Hi Hal,

Can you add libc++abi to the bgclang build? It is supposed to provide thread local for clang.
http://libcxxabi.llvm.org/
As you can see from the link line I also tried to use libsupc++ for this.

Patrick 




On 7/14/16, 8:28 PM, "Hal Finkel" <hfinkel at anl.gov> wrote:

>Hi Patrick,
>
>Thanks for the report. I suspect this is another case where bgclang++11 needs to supplement the base system libraries; I'll need to see whether that is possible. thread_local should work on plain data types; I suspect this problem is tied to the need to call a destructor on this variable when the thread terminates.
>
> -Hal
>
>----- Original Message -----
>> From: "Patrick E Gartung" <gartung at fnal.gov>
>> To: llvm-bgq-discuss at lists.alcf.anl.gov
>> Sent: Tuesday, July 12, 2016 11:25:54 PM
>> Subject: [Llvm-bgq-discuss] Does bgclang++11 implement thread_local
>> 
>> Hi
>> 
>> I am trying to link code that uses thread_local and I get this error:
>> 
>> /soft/compilers/bgclang/nightly/wbin/bgclang++11   -g -fPIC
>> -fno-vectorize -fno-slp-vectorize -std=c++11 -std=c++14  -dynamic
>> -lsupc++ CMakeFiles/TBBDemo.dir/main.cpp.o  -o
>> ../BuildProducts/bin/TBBDemo -rdynamic
>> ../BuildProducts/lib64/libTBBFrameworkCore.a
>> ../BuildProducts/lib64/libTBBTestModules.so
>> ../BuildProducts/lib64/libTBBFrameworkCore.a
>> /home/gartung/tbb44_20160526oss/build/linux_bg_clang_cc4.4.7_libc2.12_kernel2.6.32_release/libtbbmalloc.a
>> /home/gartung/tbb44_20160526oss/build/linux_bg_clang_cc4.4.7_libc2.12_kernel2.6.32_release/libtbb.a
>> -Wl,-rpath,/home/gartung/build/BuildProducts/lib64:
>> ../BuildProducts/lib64/libTBBFrameworkCore.a(ModuleThreadStack.cpp.o):
>> In function `demo::ModuleThreadStack::privateStack()':
>> /home/gartung/toy-mt-framework/TBBProcessingDemo/TBBFrameworkCore/ModuleThreadStack.cpp:21:
>> undefined reference to `__cxa_thread_atexit’
>> 
>> This is line 21 of ModuleThreadStack.cpp
>> 
>>     thread_local std::vector<TransitionModuleID> s_stack;
>> 
>> Does bgclang++11 implement thread_local?
>> 
>> Patrick Gartung
>> _______________________________________________
>> llvm-bgq-discuss mailing list
>> llvm-bgq-discuss at lists.alcf.anl.gov
>> https://lists.alcf.anl.gov/mailman/listinfo/llvm-bgq-discuss
>> 
>
>-- 
>Hal Finkel
>Assistant Computational Scientist
>Leadership Computing Facility
>Argonne National Laboratory