From a46e6af65061b65c048c1e023b298e082ab03a0b Mon Sep 17 00:00:00 2001
From: Petr Fedchenkov <giggsoff@gmail.com>
Date: Fri, 9 Sep 2022 23:30:10 +0300
Subject: [PATCH] Allow build for darwin without CGO

It is not easy to use cross-platform build with CGO enabled so lets
allow build without cgo for darwin and use virtualization framework only
 if we built with CGO.

Signed-off-by: Petr Fedchenkov <giggsoff@gmail.com>
---
 docs/platform-virtualization-framework.md          |  1 +
 src/cmd/linuxkit/Makefile                          |  1 +
 ..._virtualizationframework_darwin_cgo_disabled.go | 14 ++++++++++++++
 ..._virtualizationframework_darwin_cgo_enabled.go} |  4 ++--
 4 files changed, 18 insertions(+), 2 deletions(-)
 create mode 100644 src/cmd/linuxkit/run_virtualizationframework_darwin_cgo_disabled.go
 rename src/cmd/linuxkit/{run_virtualizationframework_darwin.go => run_virtualizationframework_darwin_cgo_enabled.go} (99%)

diff --git a/docs/platform-virtualization-framework.md b/docs/platform-virtualization-framework.md
index 69cc25e9f..8b743b8fb 100644
--- a/docs/platform-virtualization-framework.md
+++ b/docs/platform-virtualization-framework.md
@@ -9,6 +9,7 @@ with updated versions of both.
 
 Alternatively, you can install Virtualization.Framework and VPNKit standalone and use it without Docker for Mac.
 
+Virtualization.Framework is enabled on macOS only when built with CGO enabled.
 
 ## Boot
 
diff --git a/src/cmd/linuxkit/Makefile b/src/cmd/linuxkit/Makefile
index 401fb3042..53e8fbd14 100644
--- a/src/cmd/linuxkit/Makefile
+++ b/src/cmd/linuxkit/Makefile
@@ -61,6 +61,7 @@ ifeq ($(STATIC), 1)
 endif
 
 # darwin needs CGO to build for virtualization framework
+# without CGO attempt to use virtualization framework will ends with error
 ifeq ($(GOOS), darwin)
 	CGO_ENABLED=1
 endif
diff --git a/src/cmd/linuxkit/run_virtualizationframework_darwin_cgo_disabled.go b/src/cmd/linuxkit/run_virtualizationframework_darwin_cgo_disabled.go
new file mode 100644
index 000000000..114438f91
--- /dev/null
+++ b/src/cmd/linuxkit/run_virtualizationframework_darwin_cgo_disabled.go
@@ -0,0 +1,14 @@
+//go:build darwin && !cgo
+// +build darwin,!cgo
+
+package main
+
+import (
+	log "github.com/sirupsen/logrus"
+)
+
+// Process the run arguments and execute run
+func runVirtualizationFramework(args []string) {
+	log.Fatal("This build of linuxkit was compiled without virtualization framework capabilities. " +
+		"To perform 'linuxkit run' on macOS, please use a version of linuxkit compiled with virtualization framework.")
+}
diff --git a/src/cmd/linuxkit/run_virtualizationframework_darwin.go b/src/cmd/linuxkit/run_virtualizationframework_darwin_cgo_enabled.go
similarity index 99%
rename from src/cmd/linuxkit/run_virtualizationframework_darwin.go
rename to src/cmd/linuxkit/run_virtualizationframework_darwin_cgo_enabled.go
index 79a3eb060..ed5d5f1b0 100644
--- a/src/cmd/linuxkit/run_virtualizationframework_darwin.go
+++ b/src/cmd/linuxkit/run_virtualizationframework_darwin_cgo_enabled.go
@@ -1,5 +1,5 @@
-//go:build darwin
-// +build darwin
+//go:build darwin && cgo
+// +build darwin,cgo
 
 package main