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

[Iain Sandoe]

Hi Richard,

> On 5 Nov 2021, at 17:39, Richard Earnshaw <Richard.Earnshaw@foss.arm.com> wrote:
> 
> 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.

Done - it would be easier not to have two designations anyway.

the canonical triple is aarch64-*-darwin* (that is agreed between the config.* folks and the Apple OSS folks).

However, of course, the end users know the port as “arm64” and that’s the arch tag that has to be applied (but I think we can most likely keep it out of config stuff).

>> 
>> +	$(COMPILE) $<
>> +	$(POSTCOMPILE)
> 
> Otherwise, OK.

thanks - this is what I pushed:

[PATCH] Darwin, aarch64 : Initial support for the self-host driver.

At present, there is no special action needed for aarch64-darwin
this just pulls in generic Darwin code.

Signed-off-by: Iain Sandoe <iain@sandoe.co.uk>

gcc/ChangeLog:

	* config.host: Add support for aarch64-*-darwin.
	* config/aarch64/host-aarch64-darwin.c: New file.
	* config/aarch64/x-darwin: New file.
---
 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..81ff7ed1043 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*)
     case ${target} in
       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*)
+    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)
-- 
2.24.3 (Apple Git-128)