docs: compiling.html: pass -d to xz to decompress

tar on macOS recognizes XZ compression automatically, but that is
not the case for GNU tar (1.32 at least).  On Fedora 33 the current
instructions result in the following error:

  $ xz -c libvirt-6.9.0.tar.xz | tar xvf -
  tar: Archive is compressed. Use -J option
  tar: Error is not recoverable: exiting now

Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Signed-off-by: Jonathan Watt <jwatt@jwatt.org>

diff --git a/docs/compiling.html.in b/docs/compiling.html.in
index c898d163130eb2fc8aa7421e20bd7789ca492311..c2c9d9f0edf8ca6812593ca03a4ce129e26f9129 100644 (file)
--- a/docs/compiling.html.in
+++ b/docs/compiling.html.in
@@ -14,7 +14,7 @@
     </p>
 
     <pre>
-$ xz -c libvirt-x.x.x.tar.xz | tar xvf -
+$ xz -dc libvirt-x.x.x.tar.xz | tar xvf -
 $ cd libvirt-x.x.x
 $ meson build</pre>