remove dep of goplus/gop

build_install_run.go

@@ -18,10 +18,18 @@ package llgo
 
 import (
 	"github.com/goplus/llgo/x/gocmd"
+	"github.com/goplus/mod/gopmod"
 )
 
 // -----------------------------------------------------------------------------
 
+// NotFound returns if cause err is ErrNotFound or not
+func NotFound(err error) bool {
+	return gopmod.IsNotFound(err)
+}
+
+// -----------------------------------------------------------------------------
+
 func BuildDir(dir string, conf *Config, build *gocmd.BuildConfig) (err error) {
 	panic("todo")
 }