Hi Andreas,
> -----Original Message-----
> From: Gcc-patches <gcc-patches-boun...@gcc.gnu.org> On Behalf Of
> Andreas Tobler
> Sent: 06 May 2020 21:17
> To: GCC Patches <gcc-patches@gcc.gnu.org>
> Subject: [PATCH] libgcc: aarch64: Get hwcap for FreeBSD
>
> Hi all,
>
> Since FreeBSD 12, FreeBSD has a sys/auxv.h header too but it doesn't
> provide the getauxval function. Instead it offers the elf_aux_info
> function which provides a similar functionality.
> This patch gets the hwcap for FreeBSD.
>
> Is this ok for trunk?
This whole thing is gated on __gnu_linux__. Does FreeBSD set that?
Thanks,
Kyrill
>
> TIA,
> Andreas
>
> +2020-05-05 Andreas Tobler <andre...@gcc.gnu.org>
> +
> + * config/aarch64/lse-init.c: Get hwcap for FreeBSD.
> +
>
> diff --git a/libgcc/config/aarch64/lse-init.c
> b/libgcc/config/aarch64/lse-init.c
> index 00e9ab8cd1c..ab0d6b2f754 100644
> --- a/libgcc/config/aarch64/lse-init.c
> +++ b/libgcc/config/aarch64/lse-init.c
> @@ -41,7 +41,16 @@ unsigned long int __getauxval (unsigned long int);
> static void __attribute__((constructor))
> init_have_lse_atomics (void)
> {
> +#ifndef __FreeBSD__
> unsigned long hwcap = __getauxval (AT_HWCAP);
> +#else
> + unsigned long hwcap;
> + int err;
> +
> + err = elf_aux_info(AT_HWCAP, &hwcap, sizeof(hwcap));
> + if (err)
> + hwcap = 0;
> +#endif
> __aarch64_have_lse_atomics = (hwcap & HWCAP_ATOMICS) != 0;
> }
