undefined reference to `__atomic_is_lock_free'

[Richard Levitte]

The impact of BROKEN_CLANG_ATOMICS is that fallback code using thread
locking is used instead of the atomics calls.

Cheers,
Richard

On Tue, 20 Dec 2022 14:11:36 +0100,
Samiya Khanum via openssl-users wrote:
> 
> Hi,
> 
> After upgrading openssl to 3.0.7 from 1.1.1 , I see below errors.
> 
> libcrypto.so: undefined reference to `__atomic_is_lock_free'
> libcrypto.so: undefined reference to `__atomic_fetch_or_8'
> libcrypto.so: undefined reference to `__atomic_load_8'
> libcrypto.so: undefined reference to `__atomic_fetch_add_8'
> I tried  this patch, still seeing the same errors .
> Prevent Clang from emitting atomic libcalls by xtkoba · Pull Request #16584 · openssl/openssl ·
> GitHub
> 
> If we define "-DBROKEN_CLANG_ATOMICS" , it works. What is the impact If we define "
> BROKEN_CLANG_ATOMICS".
> 
> Can someone please suggest the correct way? 
> 
> Thanks & Regards,
> Samiya khanum
> 
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-- 
Richard Levitte         levitte at openssl.org
OpenSSL Project         http://www.openssl.org/~levitte/