[Pkg-libvirt-maintainers] Bug#775761: libguestfs incorrectly detects host CPU architecture -> virt-customize

[Pierre Neyron]

Hi,

I also have an issue with libguestfs incorrectly detecting the host CPU
architecture in Debian, when using the virt-customize command on a
aarch64 machine.

E.g.:

neyron at digarm:~/scm/environments-recipes/build/debian-buster-arm64$
virt-customize -a base_debian-buster-arm64.qcow2 --run-command "mkdir /test"
[   0.0] Examining the guest ...
[  11.1] Setting a random seed
virt-customize: warning: random seed could not be set for this type of
guest
[  11.2] Running: mkdir /test
virt-customize: error: host cpu (x86_64) and guest arch (aarch64) are not
compatible, so you cannot use command line options that involve running
commands in the guest.  Use --firstboot scripts instead.

If reporting bugs, run virt-customize with debugging enabled and include
the complete output:

  virt-customize -v -x [...]


This seems due to the fact that the package is built with
the ocaml mlstdutils/guestfs_config host_cpu set to "X86_64", whatever
the actual system architechure is.

Indeed, when rebuilding the arm64 package with the following patch
included, virt-customize works as expected.

--- libguestfs-1.40.2.orig/common/mlstdutils/guestfs_config.ml
+++ libguestfs-1.40.2/common/mlstdutils/guestfs_config.ml
@@ -22,4 +22,4 @@ let package_version = "1.40.2"
 let package_version_full = "1.40.2"
 let prefix = "/usr"
 let datadir = prefix ^ "/share"
-let host_cpu = "x86_64"
+let host_cpu = "aarch64"

However this patch of course will break virt-customize on other archs !.

My understanding is that this should be fixed in the packages rules, so
that "@host_cpu@" is correctly set with regard to the target arch. But I
did not find out how to do that for now.


-- System Information:
Debian Release: 10.1
  APT prefers unstable
  APT policy: (500, 'unstable'), (500, 'stable')
Architecture: arm64 (aarch64)

Kernel: Linux 4.19.0-6-arm64 (SMP w/2 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8) (ignored:
LC_ALL set to en_US.UTF-8), LANGUAGE=en_US:en (charmap=UTF-8) (ignored:
LC_ALL set to en_US.UTF-8)
Shell: /bin/sh linked to /usr/bin/bash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages libguestfs-tools depends on:
ii  curl                       7.64.0-4
ii  libc6                      2.29-3
ii  libconfig9                 1.5-0.4
ii  libfuse2                   2.9.9-1
ii  libguestfs-perl            1:1.40.2-2+b12
ii  libguestfs0                1:1.40.2-2+b12
ii  libintl-perl               1.26-2
ii  libjansson4                2.12-1
ii  liblzma5                   5.2.4-1
ii  libpcre3                   2:8.39-12
ii  libreadline8               8.0-3
ii  libstring-shellquote-perl  1.04-1
ii  libsys-virt-perl           5.6.0-1+b1
ii  libtinfo6                  6.1+20181013-2+deb10u2
ii  libvirt0                   5.6.0-2
ii  libwin-hivex-perl          1.3.18-2
ii  libxml2                    2.9.4+dfsg1-7+b3

Versions of packages libguestfs-tools recommends:
ii  gnupg  2.2.12-1+deb10u1

libguestfs-tools suggests no packages.

-- no debconf information