commit 4c93aab0bac46a52015d3f3e0760127028af54a8
author Tom Tan <Tom.Tan@microsoft.com> Tue Sep 24 00:29:25 2019
committer Commit Bot <commit-bot@chromium.org> Tue Sep 24 08:34:04 2019
tree 92a02fa71eae84adf4846c642189678a31d65b31
parent ef14f072a96608884cf913470c6dc05f495b89fe

Handle macro _M_ARM64 for MSVC build

MSVC only defines _M_ARM64 to identify Windows ARM64, so detect this macro is
necessary to building WebRTC with MSVC.

Bug: chromium:893460
Change-Id: Idd49dfb6dcf367d5efdec705b84db55087de37c1
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/154281
Commit-Queue: Tommi <tommi@webrtc.org>
Reviewed-by: Tommi <tommi@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#29280}

rtc_base/system/arch.h

diff --git a/rtc_base/system/arch.h b/rtc_base/system/arch.h
index eb77ffa..ed216e6 100644
--- a/rtc_base/system/arch.h
+++ b/rtc_base/system/arch.h
@@ -23,7 +23,7 @@
 #define WEBRTC_ARCH_X86_64
 #define WEBRTC_ARCH_64_BITS
 #define WEBRTC_ARCH_LITTLE_ENDIAN
-#elif defined(__aarch64__)
+#elif defined(_M_ARM64) || defined(__aarch64__)
 #define WEBRTC_ARCH_ARM_FAMILY
 #define WEBRTC_ARCH_64_BITS
 #define WEBRTC_ARCH_LITTLE_ENDIAN