From a08ef90811a23e0a1e700bcb44f21fae75b9ecff Mon Sep 17 00:00:00 2001
From: Jakob Unterwurzacher <jakobunt@gmail.com>
Date: Sun, 6 Jun 2021 21:10:24 +0200
Subject: [PATCH] crossbuild.bash: skip Apple Silicon build on old Go versions

---
 crossbuild.bash | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/crossbuild.bash b/crossbuild.bash
index 2510bb0..0904d54 100755
--- a/crossbuild.bash
+++ b/crossbuild.bash
@@ -20,8 +20,12 @@ GOOS=linux  GOARCH=arm64         $B
 # MacOS on Intel
 GOOS=darwin GOARCH=amd64 $B
 
-# MacOS on Apple Silicon M1
-GOOS=darwin GOARCH=arm64 $B
+# MacOS on Apple Silicon M1.
+# Go 1.16 added support for the M1 and added ios/arm64,
+# so we use this to check if we should attempt a build.
+if go tool dist list | grep ios/arm64 ; then
+	GOOS=darwin GOARCH=arm64 $B
+fi
 
 # The cross-built binary is not useful on the compile host.
 rm gocryptfs