RE: [XEN PATCH] tools: Fix configure of upstream QEMU

[Paul Durrant <xadimgnik@xxxxxxxxx>]

> -----Original Message-----
> From: Anthony PERARD <anthony.perard@xxxxxxxxxx>
> Sent: 23 September 2020 12:03
> To: xen-devel@xxxxxxxxxxxxxxxxxxxx
> Cc: Paul Durrant <paul@xxxxxxx>; Anthony PERARD <anthony.perard@xxxxxxxxxx>; 
> Ian Jackson
> <iwj@xxxxxxxxxxxxxx>; Wei Liu <wl@xxxxxxx>
> Subject: [XEN PATCH] tools: Fix configure of upstream QEMU
> 
> QEMU as recently switch its build system to use meson and the
> ./configure step with meson is more restrictive that the step used to
> be, most installation path wants to be within prefix, otherwise we
> have this error message:
> 
>     ERROR: The value of the 'datadir' option is '/usr/share/qemu-xen' which 
> must be a subdir of the
> prefix '/usr/lib/xen'.
> 
> In order to workaround the limitation, we will set prefix to the same
> one as for the rest of Xen installation, and set all the other paths.
> 
> For reference, a thread in qemu-devel:
>     "configure with datadir outside of --prefix fails with meson"
>     
> https://lore.kernel.org/qemu-devel/20200918133012.GH2024@xxxxxxxxxxxxxxxxxxxxxxx/t/
> 
> And an issue in meson:
>     "artificial limitation of directories (forced to be in prefix)"
>     https://github.com/mesonbuild/meson/issues/2561
> 
> Signed-off-by: Anthony PERARD <anthony.perard@xxxxxxxxxx>
> 

Tested-by: Paul Durrant <paul@xxxxxxx>