native-comp branch on Raspberry Pi 4

native-comp branch on Raspberry Pi 4

[Frank Haun]

Hello,

I'm not sure, should this branch compile on ARM Devices?

I've tried Raspbian 32bit and Ubuntu Core 64bit.

All necessary libs are installed.

| $ git status
| On branch feature/native-comp
| Your branch is up to date with 'origin/feature/native-comp'.

| $ ./autogen.sh
| $ ./configure --without-imagemagick --with-x-toolkit=lucid --with-pop --with-jpeg=no --with-gif=no --with-tiff=no --without-makeinfo
| $ make

First everything does fine, but then I get this:

| ...
| Loading /home/ubuntu/CVS/emacs/lisp/tooltip.el (source)...
| Finding pointers to doc strings...
| Finding pointers to doc strings...done
| Dumping under the name bootstrap-emacs.pdmp
| dumping fingerprint: 9be4874d483d5c67b257e1d30440bebceb4673d531a3b39f69150175f6101e76
| Dump complete
| Byte counts: header=96 hot=14987776 discardable=122208 cold=9776976
| Reloc counts: hot=1010305 discardable=6007
| make -C ../lisp compile-first EMACS="../src/bootstrap-emacs"
| make[2]: Entering directory '/home/ubuntu/CVS/emacs/lisp'
|   ELC      emacs-lisp/macroexp.elc
| /bin/bash: line 1: 24525 Segmentation fault      (core dumped) EMACSLOADPATH= '../src/bootstrap-emacs' -batch --no-site-file --no-site-lisp --eval '(setq load-prefer-newer t)' -f batch-byte-compile emacs-lisp/macroexp.el
| make[2]: *** [Makefile:316: emacs-lisp/macroexp.elc] Error 139
| make[2]: Leaving directory '/home/ubuntu/CVS/emacs/lisp'
| make[1]: *** [Makefile:828: bootstrap-emacs.pdmp] Error 2
| make[1]: Leaving directory '/home/ubuntu/CVS/emacs/src'
| make: *** [Makefile:424: src] Error 2

Frank
-- 
Linux ubuntu 5.3.0-1022 aarch64 GNU/Linux
Experimental Blog: <http://fhaun.de>

Re: native-comp branch on Raspberry Pi 4

[Gong-Yi Liao 廖宮毅]

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I got exactly the same error with gcc 8/9/10  on a raspberry pi 4 running
Debian buster/Sid and fedora 31/rawhide in podman container.

It seems in gccjit issue as the hello world example on gccjit doc web site
does not compile on raspberry pi 4 as  well

On Thu, Apr 16, 2020, 11:23 Frank Haun <fh@fhaun.de> wrote:

> Hello,
>
> I'm not sure, should this branch compile on ARM Devices?
>
> I've tried Raspbian 32bit and Ubuntu Core 64bit.
>
> All necessary libs are installed.
>
> | $ git status
> | On branch feature/native-comp
> | Your branch is up to date with 'origin/feature/native-comp'.
>
> | $ ./autogen.sh
> | $ ./configure --without-imagemagick --with-x-toolkit=lucid --with-pop
> --with-jpeg=no --with-gif=no --with-tiff=no --without-makeinfo
> | $ make
>
> First everything does fine, but then I get this:
>
> | ...
> | Loading /home/ubuntu/CVS/emacs/lisp/tooltip.el (source)...
> | Finding pointers to doc strings...
> | Finding pointers to doc strings...done
> | Dumping under the name bootstrap-emacs.pdmp
> | dumping fingerprint:
> 9be4874d483d5c67b257e1d30440bebceb4673d531a3b39f69150175f6101e76
> | Dump complete
> | Byte counts: header=96 hot=14987776 discardable=122208 cold=9776976
> | Reloc counts: hot=1010305 discardable=6007
> | make -C ../lisp compile-first EMACS="../src/bootstrap-emacs"
> | make[2]: Entering directory '/home/ubuntu/CVS/emacs/lisp'
> |   ELC      emacs-lisp/macroexp.elc
> | /bin/bash: line 1: 24525 Segmentation fault      (core dumped)
> EMACSLOADPATH= '../src/bootstrap-emacs' -batch --no-site-file
> --no-site-lisp --eval '(setq load-prefer-newer t)' -f batch-byte-compile
> emacs-lisp/macroexp.el
> | make[2]: *** [Makefile:316: emacs-lisp/macroexp.elc] Error 139
> | make[2]: Leaving directory '/home/ubuntu/CVS/emacs/lisp'
> | make[1]: *** [Makefile:828: bootstrap-emacs.pdmp] Error 2
> | make[1]: Leaving directory '/home/ubuntu/CVS/emacs/src'
> | make: *** [Makefile:424: src] Error 2
>
> Frank
> --
> Linux ubuntu 5.3.0-1022 aarch64 GNU/Linux
> Experimental Blog: <http://fhaun.de>
>
>
>

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Re: native-comp branch on Raspberry Pi 4

[Andrea Corallo]

I've built many times on aarch64 but not in the last weeks and always
with a libgccjit compiled form source.  Still have to try aarch32.

Andrea

-- 
akrl@sdf.org

Re: native-comp branch on Raspberry Pi 4

[Gong-Yi Liao 廖宮毅]

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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...



On Thu, Apr 16, 2020, 12:18 Andrea Corallo <akrl@sdf.org> wrote:

> I've built many times on aarch64 but not in the last weeks and always
> with a libgccjit compiled form source.  Still have to try aarch32.
>
> Andrea
>
> --
> akrl@sdf.org
>

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Re: native-comp branch on Raspberry Pi 4

[Andrea Corallo]

Gong-Yi Liao 廖宮毅 <gongyi.liao@gmail.com> 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

-- 
akrl@sdf.org