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

[Patrick E Gartung]

Hi Hal,

I managed to get things compiled with gcc4.8.4 in the $MPICH_CC wrapper. This is what I have in ~/.soft

#@default
+accttools     
+os_paths      
+trackdeps     
+user_paths    
+utility_paths 
+git-2.3.0
+cmake-3.5.1
+python-2.7.9
+bgqdriver-V1R2M2
+mpiwrapper-gcc 
+bgqtoolchain-gcc484



Patrick




On 7/14/16, 9:01 PM, "Hal Finkel" <hfinkel at anl.gov> wrote:

>----- Original Message -----
>> From: "Patrick E Gartung" <gartung at fnal.gov>
>> To: "Hal Finkel" <hfinkel at anl.gov>
>> Cc: llvm-bgq-discuss at lists.alcf.anl.gov
>> Sent: Thursday, July 14, 2016 8:53:17 PM
>> Subject: Re: [Llvm-bgq-discuss] Does bgclang++11 implement thread_local
>> 
>> Hi Hal,
>> 
>> Can you add libc++abi to the bgclang build? It is supposed to provide
>> thread local for clang.
>> http://libcxxabi.llvm.org/
>
>Not directly (integration here is tricky because of the need to support statically linking against g++-compiled code - like the BG/Q PAMI implementation), however, I plan to try extracting the implementation from there if practical.
>
>> As you can see from the link line I also tried to use libsupc++ for
>> this.
>
>Yep; the system libraries on the BG/Q are old. That's why bgclang has to supplement in many circumstances.
>
>Thanks again,
>Hal
>
>> 
>> 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
>> 
>
>-- 
>Hal Finkel
>Assistant Computational Scientist
>Leadership Computing Facility
>Argonne National Laboratory