Re: native-comp branch on Raspberry Pi 4

[Andrea Corallo]

Gong-Yi Liao 廖宮毅 <address@hidden> writes:

> Just curious... how long does it take to compile gcc & emacs native
> on your aarch64 machine?  I have never successfully get it done on a
> Rpi4b... 

Aarch64 can be quite satisfying for compiling depending on the machine.
On the one I used speed 2 compile time was about 100min (64 cores),
newer generations should be faster.

Anyway configuring libgccjit with "--enable-host-shared
--enable-languages=jit --disable-bootstrap --enable-checking=release"
makes compilation surprisingly cheap.

And regarding Emacs

make NATIVE_FAST_BOOT=1 BYTE_COMPILE_EXTRA_FLAGS='--eval "(setq comp-speed 0)"'

Is the recipe to start with on constrained HW.  On "normal" machines it
completes in ~10 min so should be sustainable on any system.

Andrea

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