bug#66249: Building for armv7 fails

bug#66249: Building for armv7 fails

[Sébastien Lerique]

Dear Guix!

I'm packaging ripgrep in an ARM VM, which needs to build Rust itself,
and fails with the following end of the log file (with the terminal
colours not represented):

--8<---------------cut here---------------start------------->8---
root@vm-remarkable2:~# guix pack -R -S /emacsbin=bin \
                         emacs-no-x fd ripgrep sqlite \
                         htop fish \
                         aspell aspell-dict-en aspell-dict-fr

[...]
ESC[32m(43/173) BUILDING typenum v1.12.0ESC[0m
> /tmp/guix-build-rust-1.54.0.drv-0/mrustc/bin/mrustc rustc-1.54.0-src/vendor/typenum/src/lib.rs -o output/rustc-build/libtypenum-1_12_0.rlib --crate-name typenum --crate-type rlib -C emit-depfile=output/rustc-build/libtypenum-1_12_0.rlib.d --crate-tag 1_12_0 --cfg debug_assertions -O -L output -L output/rustc-build
/tmp/guix-build-rust-1.54.0.drv-0/mrustc/output/rustc-build/build_typenum-1_12_0/consts.rs:2113: error:0:Duplicate definition of name 'U2' in namespace scope (::""::generated::consts) crate::generated::consts::U2/*t:TypeAlias[::""::generated::consts::U2]*/, and crate::generated::consts::U2/*t:TypeAlias[::""::generated::consts::U2]*/
ESC[31mProcess was terminated with signal 6
ESC[0mFAILING COMMAND:  /tmp/guix-build-rust-1.54.0.drv-0/mrustc/bin/mrustc rustc-1.54.0-src/vendor/typenum/src/lib.rs -o output/rustc-build/libtypenum-1_12_0.rlib --crate-name typenum --crate-type rlib -C emit-depfile=output/rustc-build/libtypenum-1_12_0.rlib.d --crate-tag 1_12_0 --cfg debug_assertions -O -L output -L output/rustc-build
BUILD FAILED
make: *** [minicargo.mk:228: output/rustc] Error 1
error: in phase 'build': uncaught exception:
%exception #<&invoke-error program: "make" arguments: ("-f" "minicargo.mk" "output/rustc" "RUSTC_TARGET=armv7-unknown-linux-gnueabihf" "RUSTC_VERSION=1.54.0" "MRUSTC_TARGET_VER=1.54" "CFLAGS=-std=gnu11" "OUTDIR_SUF=") exit-status: 2 term-signal: #f stop-signal: #f>
phase `build' failed after 10098.8 seconds
command "make" "-f" "minicargo.mk" "output/rustc" "RUSTC_TARGET=armv7-unknown-linux-gnueabihf" "RUSTC_VERSION=1.54.0" "MRUSTC_TARGET_VER=1.54" "CFLAGS=-std=gnu11" "OUTDIR_SUF=" failed with status 2
--8<---------------cut here---------------end--------------->8---

Here's the current guix version:

--8<---------------cut here---------------start------------->8---
root@vm-remarkable2:~# guix describe
Generation 2	Sep 26 2023 12:59:04	(current)
  guix b2887da
    repository URL: https://git.savannah.gnu.org/git/guix.git
    branch: master
    commit: b2887da40c6cb9d541a9df67aa726694f64d8943
--8<---------------cut here---------------end--------------->8---

And if more needed:

--8<---------------cut here---------------start------------->8---
root@vm-remarkable2:~# uname -a
Linux vm-remarkable2 6.1.0-12-armmp-lpae #1 SMP Debian 6.1.52-1 (2023-09-07) armv7l GNU/Linux
--8<---------------cut here---------------end--------------->8---


I have no idea what is triggering this, would anybody have hints to
debug?

Thanks for anything!
And best,
Sébastien

bug#66249: Acknowledgement (Building for armv7 fails)

[Sébastien Lerique]

Actually the command is:
--8<---------------cut here---------------start------------->8---
root@vm-remarkable2:~# guix pack -R -S /emacsbin=bin \
                         emacs-no-x fd ripgrep sqlite \
                         htop fish \
                         aspell aspell-dict-en aspell-dict-fr
[... fails ...]
--8<---------------cut here---------------end--------------->8---

Then the log cited in my previous message is
`/var/log/guix/drvs/sc/r2cc0imq25c45r8amvjsa4wbbxwhwc-rust-1.54.0.drv.gz`

Best,
S.

bug#66249: Acknowledgement (Building for armv7 fails)

[Sébastien Lerique]

retitle 66249 Building rust-1.54 fails on armv7

bug#66249: Building for armv7 fails

[Maxim Cournoyer]

Hello,

Sébastien Lerique <sl@eauchat.org> writes:

> retitle 66249 Building rust-1.54 fails on armv7

As you've found out, this is something that has to do with building rust
on that architecture, more precisely building 'mrustc', which is used in
Guix to boostrap rust.  The upstream issue would be this one I think:
<https://github.com/thepowersgang/mrustc/issues/78>.  It's about GCC
requiring more memory than 32 bit can address but the author mentioned a
2 GiB or something limit, I'm not sure what that is attributable to.

If you want to solve this I'd recommend you get in touch with the mrustc
author!  There is a #mrustc channel on Libera.chat IRC, as far as I
recall.

-- 
Thanks,
Maxim