[PATCH] Darwin, Arm64 : Initial support for the self-host driver.

Richard Earnshaw Richard.Earnshaw@foss.arm.com
Fri Nov 5 17:39:47 GMT 2021



On 05/11/2021 15:14, Iain Sandoe via Gcc-patches wrote:
> This allows people to host a c-family/fortran GCC cross-compiler on
> aarch64-apple-darwin (support for Ada will follow in a separate patch).
> 
> At present, there is no special action needed for aarch64-darwin;
> this just pulls in generic Darwin code.
> 
> Tested on aarch64-darwin20,
> OK for master?
> thanks,
> Iain
> 
> ---
>   gcc/config.host                          |  7 ++++-
>   gcc/config/aarch64/host-aarch64-darwin.c | 33 ++++++++++++++++++++++++
>   gcc/config/aarch64/x-darwin              |  3 +++
>   3 files changed, 42 insertions(+), 1 deletion(-)
>   create mode 100644 gcc/config/aarch64/host-aarch64-darwin.c
>   create mode 100644 gcc/config/aarch64/x-darwin
> 
> diff --git a/gcc/config.host b/gcc/config.host
> index 0a02c33cc80..37f9c719b68 100644
> --- a/gcc/config.host
> +++ b/gcc/config.host
> @@ -99,7 +99,8 @@ case ${host} in
>   esac
>   
>   case ${host} in
> -  aarch64*-*-freebsd* | aarch64*-*-linux* | aarch64*-*-fuchsia*)
> +  aarch64*-*-freebsd* | aarch64*-*-linux* | aarch64*-*-fuchsia* |\
> +  aarch64*-*-darwin* | arm64*-*-darwin*)
>       case ${target} in

I think we should avoid the term arm64.  Historically we had patterns 
that matched arm* or arm6* for the 32-bit tools.


>         aarch64*-*-*)
>   	host_extra_gcc_objs="driver-aarch64.o"
> @@ -251,6 +252,10 @@ case ${host} in
>       host_extra_gcc_objs="${host_extra_gcc_objs} driver-mingw32.o"
>       host_lto_plugin_soname=liblto_plugin.dll
>       ;;
> +  aarch64*-*-darwin* | arm64*-*-darwin*)
> +    out_host_hook_obj="${out_host_hook_obj} host-aarch64-darwin.o"
> +    host_xmake_file="${host_xmake_file} aarch64/x-darwin"
> +    ;;
>     i[34567]86-*-darwin* | x86_64-*-darwin*)
>       out_host_hook_obj="${out_host_hook_obj} host-i386-darwin.o"
>       host_xmake_file="${host_xmake_file} i386/x-darwin"
> diff --git a/gcc/config/aarch64/host-aarch64-darwin.c b/gcc/config/aarch64/host-aarch64-darwin.c
> new file mode 100644
> index 00000000000..d70f2df3bf1
> --- /dev/null
> +++ b/gcc/config/aarch64/host-aarch64-darwin.c
> @@ -0,0 +1,33 @@
> +/* aarch64/arm64-darwin host-specific hook definitions.
> +
> +Copyright The GNU Toolchain Authors.
> +
> +This file is part of GCC.
> +
> +GCC is free software; you can redistribute it and/or modify it under
> +the terms of the GNU General Public License as published by the Free
> +Software Foundation; either version 3, or (at your option) any later
> +version.
> +
> +GCC 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 General Public License
> +for more details.
> +
> +You should have received a copy of the GNU General Public License
> +along with GCC; see the file COPYING3.  If not see
> +<http://www.gnu.org/licenses/>.  */
> +
> +#define IN_TARGET_CODE 1
> +
> +#include "config.h"
> +#include "system.h"
> +#include "coretypes.h"
> +#include "hosthooks.h"
> +#include "hosthooks-def.h"
> +#include "config/host-darwin.h"
> +
> +/* Darwin doesn't do anything special for arm64/aarch64 hosts; this file
> +   exists just to include the generic config/host-darwin.h.  */
> +
> +const struct host_hooks host_hooks = HOST_HOOKS_INITIALIZER;
> diff --git a/gcc/config/aarch64/x-darwin b/gcc/config/aarch64/x-darwin
> new file mode 100644
> index 00000000000..6d788d5e89c
> --- /dev/null
> +++ b/gcc/config/aarch64/x-darwin
> @@ -0,0 +1,3 @@
> +host-aarch64-darwin.o : $(srcdir)/config/aarch64/host-aarch64-darwin.c
> +	$(COMPILE) $<
> +	$(POSTCOMPILE)
> 

Otherwise, OK.

R.


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