[llvm-dev] compiler-rt linking failure on linux-sparcv9

[John Paul Adrian Glaubitz via llvm-dev]

Hi!

On 10/22/20 12:28 AM, John Paul Adrian Glaubitz via llvm-dev wrote:
> On 10/21/20 8:19 PM, John Paul Adrian Glaubitz wrote:
>> The build on linux-sparcv9 has recently started to fail with a linker failure that looks easy to
>> fix but so far I've been unable to find out where to include the necessary -latomic [1]:
> 
> This was introduced by:

So, the build actually fails in the 32-bit libraries and I think the main problem is in [1]:

The way atomic_load/store on 32 bits are implemented is just weird. The code could just use
__atomic_load() and __atomic_store() [2].

The build doesn't fail on x86 and MIPS because these architectures have custom headers for
this code. Not sure about PPC but it looks like the code is disabled on PPC completely?

Adrian

> [1] https://github.com/llvm/llvm-project/blob/master/compiler-rt/lib/sanitizer_common/sanitizer_atomic_clang.h
> [2] https://gcc.gnu.org/onlinedocs/gcc/_005f_005fatomic-Builtins.html

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 .''`.  John Paul Adrian Glaubitz
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