[Linuxppc-users] undefined reference to __tls_get_addr_opt

[Lorenzo Chelini]

Hi All,

Thanks so much for the comments. The problem was Clang that was picking up 
the system installed GCC and not the one in the advanced toolchain.
To address the issue I used --gcc-toolchain=/opt/at10.0 and now compiles.
But I have still a problem while trying to execute.

./gemm: /lib64/ld64.so.2: version `GLIBC_2.22' not found (required by 
/dataL/lch/polly/llvm_build/lib/libGPURuntime.so)
        linux-vdso64.so.1 =>  (0x00007fff81440000)
        libGPURuntime.so => 
/dataL/lch/polly/llvm_build/lib/libGPURuntime.so (0x00007fff81410000)
        libdl.so.2 => /lib64/libdl.so.2 (0x00007fff813b0000)
        libc.so.6 => /lib64/libc.so.6 (0x00007fff811c0000)
        /lib64/ld64.so.2 (0x00007fff81460000)

        Version information:
        ./gemm:
                libc.so.6 (GLIBC_2.17) => /lib64/libc.so.6
        /dataL/lch/polly/llvm_build/lib/libGPURuntime.so:
                ld64.so.2 (GLIBC_2.22) => not found
                libc.so.6 (GLIBC_2.17) => /lib64/libc.so.6
        /lib64/libdl.so.2:
                ld64.so.2 (GLIBC_PRIVATE) => /lib64/ld64.so.2
                libc.so.6 (GLIBC_PRIVATE) => /lib64/libc.so.6
                libc.so.6 (GLIBC_2.17) => /lib64/libc.so.6
        /lib64/libc.so.6:
                ld64.so.2 (GLIBC_2.17) => /lib64/ld64.so.2
                ld64.so.2 (GLIBC_PRIVATE) => /lib64/ld64.so.2

Do you have some suggestions on how I can fix this issue as well?

This is the compilation string I am using:

clang -O3 --gcc-toolchain=/opt/at10.0 -mllvm -polly -mllvm 
-polly-target=gpu -I utilities -I linear-algebra/kernels/gemm 
utilities/polybench.c linear-algebra/kernels/gemm/gemm.c 
-L/dataL/lch/polly/llvm_build -lGPURuntime -L/opt/at10.0 -ldl -o gemm

Looking forward to hearing from you.
Best regards,
Lorenzo Chelini.




From:   "Bill Schmidt" <wschmidt at linux.ibm.com>
To:     "Segher Boessenkool" <segher at linux.ibm.com>, "Lorenzo Chelini" 
<LCH at zurich.ibm.com>
Cc:     linuxppc-users at lists.ozlabs.org
Date:   03/29/2019 18:10
Subject:        Re: [Linuxppc-users] undefined reference to 
__tls_get_addr_opt



On 3/29/19 11:16 AM, Segher Boessenkool wrote:
> Hi!
>
> On Thu, Mar 28, 2019 at 12:25:43PM +0100, Lorenzo Chelini wrote:
>> I am a PhD at IBM Zurich working on compiler. I am having the following 

>> error “undefined reference to `__tls_get_addr_opt at GLIBC_2.22'” while 
>> linking a runtime library in LLVM/Polly. Do you know how I can fix this 

>> error?
>> I am using a P9 architecture running Linux and I am using the latest 
>> advance toolchain (gcc (GCC) 8.2.1 20180813 (Advance-Toolchain-at12.0))
> No you're not:
>
>> Selected GCC installation: /usr/lib/gcc/ppc64le-redhat-linux/4.8.5
> It is picking up the system toolchain of your OS (RHEL 7?), which 
probably
> gives you a glibc 2.17, which won't work with that 2.22 symbol something
> wants (you didn't show what, or how it got that 2.22 version; either 
way,
> you don't want to use 2.17 (or 4.8.5) when developing new code).
>
> Probably if you make everything find the newer toolchain all will work
> well.  It's either a configuration problem on your side, or one of the
> tools you're trying to build is misbehaving.
These resources may help you:

https://developer.ibm.com/linuxonpower/advance-toolchain/adv-tool-usage/
https://developer.ibm.com/linuxonpower/advance-toolchain/advtool-faq/

Bill
>
> Good luck,
>
>
> Segher
>
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> Linuxppc-users at lists.ozlabs.org
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