[PATCH 20/28] aarch64: Add glibc-hwcaps support

[Adhemerval Zanella]

On 01/10/2020 13:33, Florian Weimer via Libc-alpha wrote:
> At this point, only the "atomics" subdirectory is available,
> for libraries built using LSE atomics.

LGTM, thanks.

Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>

> ---
>  sysdeps/aarch64/dl-hwcaps-subdirs.c | 31 +++++++++++++++++++++++++++++
>  1 file changed, 31 insertions(+)
>  create mode 100644 sysdeps/aarch64/dl-hwcaps-subdirs.c
> 
> diff --git a/sysdeps/aarch64/dl-hwcaps-subdirs.c b/sysdeps/aarch64/dl-hwcaps-subdirs.c
> new file mode 100644
> index 0000000000..fd6325024e
> --- /dev/null
> +++ b/sysdeps/aarch64/dl-hwcaps-subdirs.c
> @@ -0,0 +1,31 @@
> +/* Architecture-specific glibc-hwcaps subdirectories.  aarch64 version.
> +   Copyright (C) 2020 Free Software Foundation, Inc.
> +   This file is part of the GNU C Library.
> +
> +   The GNU C Library is free software; you can redistribute it and/or
> +   modify it under the terms of the GNU Lesser General Public
> +   License as published by the Free Software Foundation; either
> +   version 2.1 of the License, or (at your option) any later version.
> +
> +   The GNU C Library is distributed in the hope that it will be useful,
> +   but WITHOUT ANY WARRANTY; without even the implied warranty of
> +   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
> +   Lesser General Public License for more details.
> +
> +   You should have received a copy of the GNU Lesser General Public
> +   License along with the GNU C Library; if not, see
> +   <https://www.gnu.org/licenses/>.  */
> +
> +#include <dl-hwcaps.h>
> +#include <ldsodefs.h>
> +
> +const char _dl_hwcaps_subdirs[] = "atomics";
> +
> +int32_t
> +_dl_hwcaps_subdirs_active (void)
> +{
> +  if (GLRO (dl_hwcap) & HWCAP_ATOMICS)
> +    return 1;
> +
> +  return 0;
> +}
> 

Ok.