ran go mod vendor on the whole project

vendor/golang.org/x/sys/unix/sockcmsg_unix.go

@@ -8,33 +8,17 @@
 
 package unix
 
-import (
-	"runtime"
-	"unsafe"
-)
+import "unsafe"
 
 // Round the length of a raw sockaddr up to align it properly.
 func cmsgAlignOf(salen int) int {
-	salign := SizeofPtr
-
-	switch runtime.GOOS {
-	case "aix":
-		// There is no alignment on AIX.
-		salign = 1
-	case "darwin", "dragonfly", "solaris", "illumos":
-		// NOTE: It seems like 64-bit Darwin, DragonFly BSD,
-		// illumos, and Solaris kernels still require 32-bit
-		// aligned access to network subsystem.
-		if SizeofPtr == 8 {
-			salign = 4
-		}
-	case "netbsd", "openbsd":
-		// NetBSD and OpenBSD armv7 require 64-bit alignment.
-		if runtime.GOARCH == "arm" {
-			salign = 8
-		}
+	salign := sizeofPtr
+	// NOTE: It seems like 64-bit Darwin, DragonFly BSD and
+	// Solaris kernels still require 32-bit aligned access to
+	// network subsystem.
+	if darwin64Bit || dragonfly64Bit || solaris64Bit {
+		salign = 4
 	}
-
 	return (salen + salign - 1) & ^(salign - 1)
 }