Add a target config for MINGW on ARM64

This is necessary to build OpenSSL native on Windows on Arm64 with gcc or clang.
It also works when cross compiling on Linux for aarch64-w64-windows-gnu.

This patch is used since years on MSYS2:
  https://github.com/msys2/MINGW-packages/blob/master/mingw-w64-openssl/001-support-aarch64.patch

Fixes #10533

Reviewed-by: Saša Nedvědický <sashan@openssl.org>
Reviewed-by: Tomas Mraz <tomas@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/26605)

diff --git a/Configurations/10-main.conf b/Configurations/10-main.conf
index 947cf568ecaf70c2d71ba0e4b1faa1a62f452eec..61ee0ce338f5249b9bd0c83c4d112a9ffe17c2bf 100644 (file)
--- a/Configurations/10-main.conf
+++ b/Configurations/10-main.conf
@@ -1746,6 +1746,18 @@ my %targets = (
         multilib         => "64",
     },
 
+    "mingwarm64" => {
+        inherit_from     => [ "mingw-common" ],
+        cflags           => "",
+        sys_id           => "MINGWARM64",
+        bn_ops           => add("SIXTY_FOUR_BIT"),
+        asm_arch         => 'aarch64',
+        uplink_arch      => 'armv8',
+        perlasm_scheme   => "win64",
+        shared_rcflag    => "",
+        multilib         => "-arm64",
+    },
+
 #### UEFI
     "UEFI" => {
         inherit_from     => [ "BASE_unix" ],