bug#36882: Qemu 4.2.0 build for x86_64-linux fails

[Ludovic Courtès]

Hi,

Mathieu Othacehe <address@hidden> skribis:

> On core-updates, qemu-minimal (4.2.0), fails to build. This seems to be
> the same issue as this bug. The error is:
>
> In file included from 
> /gnu/store/jsjsczgr8xdnbdminl7lm2v56b7dq7lq-glibc-2.31/include/features.h:489:0,
>                  from 
> /gnu/store/jsjsczgr8xdnbdminl7lm2v56b7dq7lq-glibc-2.31/include/bits/libc-header-start.h:33,
>                  from 
> /gnu/store/jsjsczgr8xdnbdminl7lm2v56b7dq7lq-glibc-2.31/include/stdint.h:26,
>                  from linuxboot_dma.c:65:
> /gnu/store/jsjsczgr8xdnbdminl7lm2v56b7dq7lq-glibc-2.31/include/gnu/stubs.h:7:11:
>  fatal error: gnu/stubs-32.h: No such file or directory
>  # include <gnu/stubs-32.h>
>            ^~~~~~~~~~~~~~~~
>
> Because of this gcc command:
>
> /gnu/store/dcnp1h3q6qyipwkm0g7l7r1bkvlqvaqa-gcc-7.5.0/bin/gcc -iquote 
> /tmp/guix-build-qemu-minimal-4.2.0.drv-0/qemu-4.2.0/. -iquote . -iquote 
> /tmp/guix-build-qemu-minimal-4.2.0.drv-0/qemu-4.2.0/tcg -iquote 
> /tmp/guix-build-qemu-minimal-4.2.0.drv-0/qemu-4.2.0/tcg/i386 
> -I/tmp/guix-build-qemu-minimal-4.2.0.drv-0/qemu-4.2.0/linux-headers 
> -I/tmp/guix-build-qemu-minimal-4.2.0.drv-0/qemu-4.2.0/linux-headers -iquote . 
> -iquote /tmp/guix-build-qemu-minimal-4.2.0.drv-0/qemu-4.2.0 -iquote 
> /tmp/guix-build-qemu-minimal-4.2.0.drv-0/qemu-4.2.0/accel/tcg -iquote 
> /tmp/guix-build-qemu-minimal-4.2.0.drv-0/qemu-4.2.0/include 
> -I/tmp/guix-build-qemu-minimal-4.2.0.drv-0/qemu-4.2.0 -Wstrict-prototypes 
> -Wredundant-decls -Wall -Wundef -Wwrite-strings -Wmissing-prototypes 
> -Wexpansion-to-defined -Wendif-labels -Wno-shift-negative-value 
> -Wno-missing-include-dirs -Wempty-body -Wnested-externs -Wformat-security 
> -Wformat-y2k -Winit-self -Wignored-qualifiers -Wold-style-declaration 
> -Wold-style-definition -Wtype-limits -fno-pie -ffreestanding   
> -fno-stack-protector   -m16   -Wa,-32 -MMD -MP -MT linuxboot_dma.o -MF 
> ./linuxboot_dma.d -O2 -march=i486  -c -o linuxboot_dma.o linuxboot_dma.c

How was this bug initially reported against QEMU 4.0.0 fixed?

On master there’s pretty much the same command as above, with ‘-m16’,
and “yet it works”.

  https://ci.guix.gnu.org/log/ymzp5yz2r3zfw4xczwwlykyjv2kqcqs0-qemu-4.2.0

Ludo’.