The following patch broke compilation of xf86-video-qxl:
commit b41220b1441b8adea6db9a98e9da1b43a8f426bb
Author: Christophe Fergeau <cfergeau@xxxxxxxxxx>
Date: Thu Mar 5 15:28:22 2015 +0100
Mark unused public API methods/code as deprecated
Acked-by: Jonathon Jongsma <jjongsma@xxxxxxxxxx>
The reason is it introduces a #include <glib.h> in spice-server.h which
is a *public* header! This means any application that needs to include
spice-server.h, like xf86-video-qxl, must now check for GLib even if
they don't use it, like xf86-video-qxl.
This does not make sense and thus the glib.h include must be removed.
However it was added to get G_GNUC_DEPRECATED. Fortunately there is
SPICE_GNUC_DEPRECATED, or maybe that's SPICE_DEPRECATED? It gets a bit
confusing from here:
First the macros to tag deprecated functions:
* spice uses G_GNUC_DEPRECATED directly in spice-server.h as seen above.
* spice-gtk defines SPICE_DEPRECATED in spice-util.h as a wrapper around
G_GNUC_DEPRECATED, or an empty macro if SPICE_NO_DEPRECATED is
defined.
* spice-gtk also has a SPICE_GNUC_DEPRECATED_FOR() macro which is not
defined anywhere else and a corresponding wrapper,
SPICE_DEPRECATED_FOR(), which is a no-op if SPICE_NO_DEPRECATED is
defined.
* spice-protocol defines SPICE_GNUC_DEPRECATED in spice/macro.h but
uses the gcc __attribute__ macro directly instead of using
G_GNUC_DEPRECATED.
Second the macros to 'enable/disable' deprecated APIs:
* In spice-gtk defining SPICE_NO_DEPRECATED disables the warnings.
* In spice-protocol you must define SPICE_DEPRECATED to get access to
the deprecated vd_agent.h VD_AGENT_CLIPBOARD_MAX_SIZE_DEFAULT and
VD_AGENT_CLIPBOARD_MAX_SIZE_ENV macros.
Of course spice-gtk's source files use both spice-util.h and vd_agent.h,
meaning they necessarily get the spice-protocol deprecated macros due to
the SPICE_DEPRECATED naming conflict.
So here is the proposed solution:
* spice-protocol's SPICE_DEPRECATED is in a public header so keep it as
is. Extend it to mean the user wants to use deprecated APIs. This
includes:
- Defining deprecated APIs and macros (as before).
- Disabling warnings about the use of deprecated APIs so it takes
over spice-gtk's SPICE_NO_DEPRECATED role.
* Disable spice-protocol's SPICE_GNUC_DEPRECATED warnings when
SPICE_DEPRECATED is defined.
* Add SPICE_GNUC_DEPRECATED_FOR() to spice-protocol next to
SPICE_GNUC_DEPRECATED.
* Extend spice-protocol's SPICE_GNUC_DEPRECATED to use G_GNUC_DEPRECATED
if available. This makes it a portable drop-in replacement for
G_GNUC_DEPRECATED in Spice's code, particularly in spice-server.h.
This implies spice and spice-gtk will need an up-to-date spice-protocol
to compile.
--
Francois Gouget <fgouget@xxxxxxxxxxxxxxx>
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