Add ARM and ARM64 GCC drivers to OpenBSD host tools

Fixes a linker error when cross-compiling GCC to OpenBSD:

ld: error: undefined symbol: host_detect_local_cpu(int, char const**)
>>> referenced by gcc.cc
>>>               gcc.o:(static_spec_functions)
collect2: error: ld returned 1 exit status
make[2]: *** [Makefile:2336: xgcc] Error 1

Author: Kartatz

build.sh

@@ -302,6 +302,7 @@ if ! [ -f "${gcc_tarball}" ]; then
 	patch --directory="${gcc_directory}" --strip='1' --input="${workdir}/patches/0001-Turn-Wint-conversion-back-into-an-warning.patch"
 	patch --directory="${gcc_directory}" --strip='1' --input="${workdir}/patches/0001-Fix-libgcc-build-on-arm.patch"
 	patch --directory="${gcc_directory}" --strip='1' --input="${workdir}/patches/0001-Add-relative-RPATHs-to-GCC-host-tools.patch"
+	patch --directory="${gcc_directory}" --strip='1' --input="${workdir}/patches/0001-Add-ARM-and-ARM64-drivers-to-OpenBSD-host-tools.patch"
 
 	if [[ "${CROSS_COMPILE_TRIPLET}" == *'-openbsd'* ]]; then
 		patch --directory="${gcc_directory}" --strip='1' --input="${workdir}/patches/0001-Fix-missing-stdint.h-include-when-compiling-host-tools-on-OpenBSD.patch"

patches/0001-Add-ARM-and-ARM64-drivers-to-OpenBSD-host-tools.patch

@@ -0,0 +1,34 @@
+From a289af598ca58a5b7a61aea87a112f23dc66d984 Mon Sep 17 00:00:00 2001
+From: Kartatz <105828205+Kartatz@users.noreply.github.com>
+Date: Fri, 11 Jul 2025 15:54:18 -0300
+Subject: [PATCH] Add ARM and ARM64 drivers to OpenBSD host tools
+
+---
+ gcc/config.host | 4 ++--
+ 1 file changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/gcc/config.host b/gcc/config.host
+index 4c1a5e991..362ed53da 100644
+--- a/gcc/config.host
++++ b/gcc/config.host
+@@ -100,7 +100,7 @@ esac
+ 
+ case ${host} in
+   aarch64*-*-freebsd* | aarch64*-*-linux* | aarch64*-*-fuchsia* |\
+-  aarch64*-*-darwin*)
++  aarch64*-*-darwin* | aarch64*-*-openbsd*)
+     case ${target} in
+       aarch64*-*-*)
+ 	host_extra_gcc_objs="driver-aarch64.o"
+@@ -108,7 +108,7 @@ case ${host} in
+ 	;;
+     esac
+     ;;
+-  arm*-*-freebsd* | arm*-*-netbsd* | arm*-*-linux* | arm*-*-fuchsia*)
++  arm*-*-freebsd* | arm*-*-netbsd* | arm*-*-linux* | arm*-*-fuchsia* | arm*-*-openbsd*)
+     case ${target} in
+       arm*-*-*)
+ 	host_extra_gcc_objs="driver-arm.o"
+-- 
+2.49.0
+