cmd: llgo -abi flag (default 2)

cmd/internal/flags/flags.go

@@ -14,12 +14,14 @@ var Verbose bool
 var BuildEnv string
 var Tags string
 var Target string
+var AbiMode int
 
 func AddBuildFlags(fs *flag.FlagSet) {
 	fs.BoolVar(&Verbose, "v", false, "Verbose mode")
 	fs.StringVar(&Tags, "tags", "", "Build tags")
 	fs.StringVar(&BuildEnv, "buildenv", "", "Build environment")
 	fs.StringVar(&Target, "target", "", "Target platform (e.g., rp2040, wasi)")
+	fs.IntVar(&AbiMode, "abi", 2, "ABI mode (default 2). 0 = none, 1 = cfunc, 2 = allfunc.")
 }
 
 var Gen bool