build: separate compiler and libs

compiler/internal/lib/runtime/runtime.go

@@ -0,0 +1,36 @@
+/*
+ * Copyright (c) 2024 The GoPlus Authors (goplus.org). All rights reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package runtime
+
+// llgo:skipall
+import (
+	_ "unsafe"
+)
+
+// GOROOT returns the root of the Go tree. It uses the
+// GOROOT environment variable, if set at process start,
+// or else the root used during the Go build.
+func GOROOT() string {
+	/*
+		s := gogetenv("GOROOT")
+		if s != "" {
+			return s
+		}
+		return defaultGOROOT
+	*/
+	panic("todo: GOROOT")
+}