Re: RM: oclgrind [armel] -- ROP; FTBFS with clang 7

[Andreas Beckmann <anbe@debian.org>]

On 2019-02-18 11:25, John Paul Adrian Glaubitz wrote:
> Hi Andreas!
> 
>> /usr/bin/ld: liboclgrind-18.3.so: undefined reference to `__atomic_fetch_add_4'
>> /usr/bin/ld: liboclgrind-18.3.so: undefined reference to `__atomic_exchange_4'
>> /usr/bin/ld: liboclgrind-18.3.so: undefined reference to `__atomic_fetch_sub_4'
>> /usr/bin/ld: liboclgrind-18.3.so: undefined reference to `__atomic_load_1'
>> /usr/bin/ld: liboclgrind-18.3.so: undefined reference to `__atomic_store_4'
>> /usr/bin/ld: liboclgrind-18.3.so: undefined reference to `__atomic_load_4'
>> /usr/bin/ld: liboclgrind-18.3.so: undefined reference to `__atomic_store_1'
>> /usr/bin/ld: liboclgrind-18.3.so: undefined reference to `__atomic_compare_exchange_4'
>> collect2: error: ld returned 1 exit status
>>
>> and I don't have time to debug this.
> 
> This is most likely caused by a missing -latomic in the linker options,
> see [1]. armel doesn't have these atomics built-in in hardware, so you
> need to use an external helper library for that.
> 
> Adrian
> 
>> [1] https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=915046

Thanks for the pointer, will look into it.


Andreas