libxfce4ui fails to cross build from source, because it fails running
the gtk-doc scanner with an Exec format error. This is fairly usual.
Fortunately, it also splits out its documentation to an Arch:all
package. Hence, we can disable gtk-doc in arch-only builds and thus
side-step this problem making the cross build succeed. I'm attaching a
patch for your convenience.

Helmut

Hi Helmut, thanks for the report and the patch.

The patch looks small, and I don't know a lot about cross-building, but would
it be better to use something like:

 ifneq (,$(filter cross,$(DEB_BUILD_PROFILES))

inside override_dh_auto_configure to only add gtk-doc when not cross-building?

Regards,

Hi Helmut, thanks for the report and the patch.

The patch looks small, and I don't know a lot about cross-building, but would
it be better to use something like:

 ifneq (,$(filter cross,$(DEB_BUILD_PROFILES))

inside override_dh_auto_configure to only add gtk-doc when not cross-building?

Regards,

Hi,

While that might technically work, such cross vs native differences are
fragile and in a lot of cases, I've had to fix them, so I strongly
prefer to not add cross vs native differences to the build unless
necessary.

Here, no part of an arch-only build needs gtk-doc. For this, it does not
matter whether the build is cross or native. It applies to any arch-only
build. In particular, disabling gtk-doc, also speeds up the build. I
actually performed an arch-only and a full build to verify that no
files go missing by this change using reproducible builds.

Is this line of reasoning convincing to you?

Helmut

Yes indeed, thanks for the explanation then. I'll import the diff to our
repository.

Regards,