gcc: Add some patches to get gcc 10.2 building on ARM based Mac

Pull in a change from upstream GCC and one from the gcc-darwin-arm64
repo that gets an initial cross compiler building on ARM based Mac.

Signed-off-by: Kumar Gala <kumar.gala@linaro.org>

2 files changed, 132 insertions, 0 deletions

diff --git a/packages/gcc/10.2.0/0020-Darwin-Adjust-the-PCH-area-to-allow-for-16384byte-pa.patch b/packages/gcc/10.2.0/0020-Darwin-Adjust-the-PCH-area-to-allow-for-16384byte-pa.patch
new file mode 100644
index 0000000..4904368
--- /dev/null
+++ b/packages/gcc/10.2.0/0020-Darwin-Adjust-the-PCH-area-to-allow-for-16384byte-pa.patch
@@ -0,0 +1,35 @@
+From 22a26745add0b02a96d1b65c953529f217a52bad Mon Sep 17 00:00:00 2001
+From: Iain Sandoe <iain@sandoe.co.uk>
+Date: Sat, 8 Aug 2020 12:15:09 +0100
+Subject: [PATCH 1/2] Darwin: Adjust the PCH area to allow for 16384byte page
+ size.
+
+Newer versions of Darwin report pagesize 20 which means that we
+need to adjust the aligment of the PCH area.
+
+gcc/ChangeLog:
+
+	* config/host-darwin.c: Align pch_address_space to 16384.
+---
+ gcc/config/host-darwin.c | 5 ++++-
+ 1 file changed, 4 insertions(+), 1 deletion(-)
+
+diff --git a/gcc/config/host-darwin.c b/gcc/config/host-darwin.c
+index 0face6c450f..c862935dcf3 100644
+--- a/gcc/config/host-darwin.c
++++ b/gcc/config/host-darwin.c
+@@ -24,7 +24,10 @@
+ #include "config/host-darwin.h"
+ 
+ /* Yes, this is really supposed to work.  */
+-static char pch_address_space[1024*1024*1024] __attribute__((aligned (4096)));
++/* This allows for a pagesize of 16384, which we have on Darwin20, but should
++   continue to work OK for pagesize 4096 which we have on earlier versions.
++   The size is 1 (binary) Gb.  */
++static char pch_address_space[65536*16384] __attribute__((aligned (16384)));
+ 
+ /* Return the address of the PCH address space, if the PCH will fit in it.  */
+ 
+-- 
+2.28.0
+
diff --git a/packages/gcc/10.2.0/0021-Darwin-Arm64-Initial-support-for-the-self-host-drive.patch b/packages/gcc/10.2.0/0021-Darwin-Arm64-Initial-support-for-the-self-host-drive.patch
new file mode 100644
index 0000000..12d99f8
--- /dev/null
+++ b/packages/gcc/10.2.0/0021-Darwin-Arm64-Initial-support-for-the-self-host-drive.patch
@@ -0,0 +1,97 @@
+From ffecb0ce72f51ec134dc33636eedcebe53e4ec9e Mon Sep 17 00:00:00 2001
+From: Iain Sandoe <iain@sandoe.co.uk>
+Date: Tue, 18 Aug 2020 22:29:51 +0100
+Subject: [PATCH 2/2] Darwin, Arm64: Initial support for the self-host driver.
+
+At present, this just includes the generic Darwin stuff.
+
+NOTE:
+
+This patch is pulled from: https://github.com/iains/gcc-darwin-arm64/
+
+See commit 89dc5a9d5ed3e6b2ba6a4725bd51841ee758b6cd
+
+Its been backported to gcc-10.2
+---
+ gcc/config.host                          |  7 +++++-
+ gcc/config/aarch64/host-aarch64-darwin.c | 32 ++++++++++++++++++++++++
+ gcc/config/aarch64/x-darwin              |  3 +++
+ 3 files changed, 41 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 84f0433e2ad..8489145e1b1 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
+       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-0.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..1a2cd4c9dab
+--- /dev/null
++++ b/gcc/config/aarch64/host-aarch64-darwin.c
+@@ -0,0 +1,32 @@
++/* Arm64-darwin host-specific hook definitions.
++   Copyright (C) 2020 Free Software Foundation, Inc.
++
++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)
+-- 
+2.28.0
+