build: separate compiler and libs

compiler/cl/internal/linktarget/foo.go

@@ -0,0 +1,23 @@
+package linktarget
+
+import (
+	"github.com/goplus/llgo/c"
+)
+
+func F(a, b *c.Char) {
+	c.Printf(c.Str("a: %s, b: %s\n"), a, b)
+}
+
+var _ m
+
+type m struct {
+	s string
+}
+
+func (t m) info() string {
+	return t.s
+}
+
+func (t *m) setInfo(s string) {
+	t.s = s
+}