[PATCH] openssl: Use linux-latomic target for ARC

[Alexey Brodkin]

Hello,

Please disregard this patch, as it was meant for OE-core,
where it is now posted, see https://lists.openembedded.org/g/openembedded-core/message/159312

-Alexey

> From: Alexey Brodkin <abrodkin at synopsys.com>
> Sent: Tuesday, December 7, 2021 6:59 PM
> To: openembedded-devel at lists.openembedded.org <openembedded-devel at lists.openembedded.org>
> Cc: linux-snps-arc at lists.infradead.org <linux-snps-arc at lists.infradead.org>; Alexey Brodkin <abrodkin at synopsys.com>
> Subject: [PATCH] openssl: Use linux-latomic target for ARC 
>  
> Some atomic ops for 32-bit ARC processors are implemented in GCC's libatomic.
> For example those dealing with 64-bit data (e.g. __atomic_load_8()) as well as
> some others. That said it's required to add "-latomic" for successful linkage.
> 
> Otherwise error messages like this happen on OpenSSL building for ARC:
> ------------------------------->8------------------------------
> | ...ld: libcrypto.a(libcrypto-lib-threads_pthread.o): in function `CRYPTO_atomic_or':
> | .../openssl-3.0.0/crypto/threads_pthread.c:219: undefined reference to `__atomic_is_lock_free'
> | ...ld: .../openssl-3.0.0/crypto/threads_pthread.c:219: undefined reference to `__atomic_is_lock_free'
> | ...ld: .../openssl-3.0.0/crypto/threads_pthread.c:220: undefined reference to `__atomic_fetch_or_8'
> ------------------------------->8------------------------------
> 
> Fix that by using a special target, which does exactly what's needed.
> See [1] and [2] for more details on the matter.
> 
> [1] https://github.com/openssl/openssl/commit/cdf2986a70d92668d882eb29737225f1aaafd0f1
> [2] https://github.com/openssl/openssl/pull/15640
> 
> Signed-off-by: Alexey Brodkin <abrodkin at synopsys.com>
> ---
>  meta/recipes-connectivity/openssl/openssl_3.0.0.bb | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/meta/recipes-connectivity/openssl/openssl_3.0.0.bb b/meta/recipes-connectivity/openssl/openssl_3.0.0.bb
> index 4b1ae71a85..da73ed6bc3 100644
> --- a/meta/recipes-connectivity/openssl/openssl_3.0.0.bb
> +++ b/meta/recipes-connectivity/openssl/openssl_3.0.0.bb
> @@ -70,6 +70,9 @@ do_configure () {
>          esac
>          target="$os-${HOST_ARCH}"
>          case $target in
> +       linux-arc)
> +               target=linux-latomic
> +               ;;
>          linux-arm*)
>                  target=linux-armv4
>                  ;;
> -- 
> 2.16.2
>