Bug#976942: multiboot: FTBFS on ppc64el (arch:all-only src pkg): boot.S:44: Error: unrecognized opcode: `jmp'

[Lucas Nussbaum]

Source: multiboot
Version: 0.6.96+20101113-2
Severity: serious
Justification: FTBFS on ppc64el
Tags: bullseye sid ftbfs
Usertags: ftbfs-20201209 ftbfs-bullseye ftbfs-ppc64el

Hi,

During a rebuild of all packages in sid, your package failed to build
on ppc64el. At the same time, it did not fail on amd64.

I'm marking this bug as severity:serious since your package has only
Architecture:all binary packages, and should thus, in theory, build
everywhere. Failure to build on ppc64el might indicate a serious issue
in this package or in another package.

But feel free to downgrade or close if you believe that this is only a
build-time issue. (I would personnally prefer a severity:minor bug just to
track that the package can only be built on specific architectures.)

Relevant part (hopefully):
> gcc -DHAVE_CONFIG_H -I. -I..  -m32 -nostdlib -fno-builtin -nostdinc -O -g -Wall -imacros ../config.h -Wdate-time  -DHAVE_CONFIG_H -I. -I..  -Wdate-time -g -O2 -fdebug-prefix-map=/<<PKGBUILDDIR>>=. -specs=/usr/share/dpkg/no-pie-compile.specs -c -o kernel-boot.o `test -f 'boot.S' || echo './'`boot.S
> boot.S: Assembler messages:
> boot.S:44: Error: unrecognized opcode: `jmp'
> boot.S:82: Error: unrecognized opcode: `movl'
> boot.S:85: Error: unrecognized opcode: `pushl'
> boot.S:86: Error: unrecognized opcode: `popf'
> boot.S:89: Error: unrecognized opcode: `pushl'
> boot.S:91: Error: unrecognized opcode: `pushl'
> boot.S:94: Error: unrecognized opcode: `call'
> boot.S:97: Error: unrecognized opcode: `pushl'
> boot.S:98: Error: unrecognized opcode: `call'
> boot.S:100: Error: unrecognized opcode: `hlt'
> boot.S:101: Error: unrecognized opcode: `jmp'
> make[4]: *** [Makefile:430: kernel-boot.o] Error 1

The full build log is available from:
   http://qa-logs.debian.net/2020/12/09/multiboot_0.6.96+20101113-2_unstable.log

A list of current common problems and possible solutions is available at
http://wiki.debian.org/qa.debian.org/FTBFS . You're welcome to contribute!

If you reassign this bug to another package, please marking it as 'affects'-ing
this package. See https://www.debian.org/Bugs/server-control#affects

If you fail to reproduce this, please provide a build log and diff it with me
so that we can identify if something relevant changed in the meantime.

About the archive rebuild: The rebuild was done on a Power8 cluster part of the
Grid'5000 testbed. Hardware specs: https://www.grid5000.fr/w/Grenoble:Hardware#drac