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

[Mathieu Othacehe]

Hello,

On core-updates, qemu-minimal (4.2.0), fails to build. This seems to be
the same issue as this bug. The error is:

--8<---------------cut here---------------start------------->8---
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:

--8<---------------cut here---------------start------------->8---
/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
--8<---------------cut here---------------end--------------->8---

Any idea? Do we still need to add "multilib header" support to our
glibc build?

Thanks,

Mathieu