Can I build emacs 27.1 with native-comp?

[Sleepful]

I run doom emacs, and they only support up to emacs 27, readme says that native-comp installs eamcs 28.

What's the difference between these:

• ./build-emacs-for-macos emacs-27.1 --native-comp
• ./build-emacs-for-macos feature/native-comp

[jimeh]

In short, no. Native-comp is based on top of the current master branch, which is Emacs 28.

From what I recall with doom-emacs, it required Emacs 26.1 or later, with 27 being recommended. And I'm pretty sure I've toyed with doom-emacs on a native comp build without issue.

To answer your question of what the difference is between those commands:

• ./build-emacs-for-macos emacs-27.1 --native-comp will download and build from the emacs-27.1 branch, and due the --native-comp flag it will check for native-comp support in the configure script, which will fail, and it should exit with an error.
• ./build-emacs-for-macos feature/native-comp will download and buld from the feature/native-comp branch. As neither --native-comp or --no-native-comp is given to explicitly enable/disable native-comp, it will attempt to detect support for native-comp, and enable it if detected.

I'm closing this issue now, but feel free to reply if you've got any more questions.