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meson: Introduce qemu_datadir option

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There is no guarantee that QEMU and libvirt have been configured
with the same prefix.

In particular, Homebrew on macOS will pass a different, private
prefix for each package version and then use symlinks to make
the files for a specific version appear in the usual locations.

This works perfectly fine as long as one package doesn't try to
go poking around another package's data - which is exactly what
libvirt needs to do in order to read and parse the QEMU interop
data.

qemu_datadir can now be explicitly provided to make this and
other uncommon scenarios work. The common scenario, where QEMU
and libvirt both use the same prefix, is unaffected.

https://gitlab.com/libvirt/libvirt/-/issues/168

Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
This commit is contained in:
Andrea Bolognani
2021-11-15 18:13:56 +01:00
parent c46c2e15d1
commit 794af15f24
3 changed files with 7 additions and 1 deletions
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meson_options.txt
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@@ -62,6 +62,7 @@ option('driver_qemu', type: 'feature', value: 'auto', description: 'QEMU/KVM dri
option('qemu_user', type: 'string', value: '', description: 'username to run QEMU system instance as')
option('qemu_group', type: 'string', value: '', description: 'groupname to run QEMU system instance as')
option('qemu_moddir', type: 'string', value: '', description: 'set the directory where QEMU modules are located')
option('qemu_datadir', type: 'string', value: '', description: 'set the directory where QEMU shared data is located')
option('driver_remote', type: 'feature', value: 'auto', description: 'remote driver')
option('remote_default_mode', type: 'combo', choices: ['legacy', 'direct'], value: 'direct', description: 'remote driver default mode')
option('driver_secrets', type: 'feature', value: 'auto', description: 'local secrets management driver')