On Thu, Jan 20, 2022 at 1:38 PM Paul Smith <psm...@gnu.org> wrote: > > On Thu, 2022-01-20 at 08:59 +0800, Hongyi Zhao wrote: > > Maybe I didn't express my question clearly. I actually meant to say > > if the following one are equivalent to obtain the exit code: > > > > $($?) and $$? > > It's essentially impossible to talk about variables by themselves: the > only way it makes sense to talk about them is by showing how they are > used. If you show me a complete example makefile that uses those two > different forms, I can tell you what it will do and how make will treat > them. > > Of course, if you do that you can just run make yourself and see what > happens without needing to ask :). > > However, the short answer is no, they are not even close to being > equivalent.
Ok, thanks for the clarification. HZ
