$NetBSD: patch-gcc_config.gcc,v 1.2 2025/06/08 07:37:45 wiz Exp $

Support Darwin/aarch64, from https://github.com/Homebrew/formula-patches.

--- gcc/config.gcc.orig	2025-05-23 11:02:04.272197204 +0000
+++ gcc/config.gcc
@@ -1177,13 +1177,22 @@ case ${target} in
   ;;
 esac
 
-# Figure out if we need to enable heap trampolines by default
+# Figure out if we need to enable heap trampolines
+# and variadic functions handling.
 case ${target} in
+aarch64*-*-darwin2*)
+  # This applies to arm64 Darwin variadic funtions.
+  tm_defines="$tm_defines STACK_USE_CUMULATIVE_ARGS_INIT=1"
+  # Executable stack is forbidden.
+  tm_defines="$tm_defines HEAP_TRAMPOLINES_INIT=1"
+  ;;
 *-*-darwin2*)
+  tm_defines="$tm_defines STACK_USE_CUMULATIVE_ARGS_INIT=0"
   # Currently, we do this for macOS 11 and above.
   tm_defines="$tm_defines HEAP_TRAMPOLINES_INIT=1"
   ;;
 *)
+  tm_defines="$tm_defines STACK_USE_CUMULATIVE_ARGS_INIT=0"
   tm_defines="$tm_defines HEAP_TRAMPOLINES_INIT=0"
   ;;
 esac
@@ -1227,6 +1236,14 @@ aarch64*-*-elf | aarch64*-*-fuchsia* | a
 	done
 	TM_MULTILIB_CONFIG=`echo $TM_MULTILIB_CONFIG | sed 's/^,//'`
 	;;
+aarch64-*-darwin* )
+	tm_file="${tm_file} aarch64/aarch64-errata.h"
+	tmake_file="${tmake_file} aarch64/t-aarch64 aarch64/t-aarch64-darwin"
+	tm_defines="${tm_defines} TARGET_DEFAULT_ASYNC_UNWIND_TABLES=1"
+	tm_defines="${tm_defines} DISABLE_AARCH64_AS_CRC_BUGFIX=1"
+	# Choose a default CPU version that will work for all current releases.
+	with_cpu=${with_cpu:-apple-m1}
+	;;
 aarch64*-*-freebsd*)
 	tm_file="${tm_file} elfos.h ${fbsd_tm_file}"
 	tm_file="${tm_file} aarch64/aarch64-elf.h aarch64/aarch64-errata.h aarch64/aarch64-freebsd.h"