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

[Hal Finkel]

Hi Patrick,

Thanks! Indeed; shipping a newer libstdc++ with bgclang is also an option ;)

 -Hal

----- 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 9:04:42 PM
> Subject: Re: [Llvm-bgq-discuss] Does bgclang++11 implement thread_local
> 
> 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
> 

-- 
Hal Finkel
Assistant Computational Scientist
Leadership Computing Facility
Argonne National Laboratory