3rdparty: remove xcb libs and bump minimal required version to 1.11

With libxcb 1.11 as minimal required version we can:

(a) (Maybe) Enable threaded GL for MESA, see QTBUG-67277.

(b) Avoid performance issues described in QTBUG-46017. Bundled xcb libs don't
    contain the more modern SHM fd passing APIs. The official binaries use
    "-qt-xcb", therefore we were shipping with the performance fix #ifdef-ed out.

(c) Make xcb-xkb a mandatory dependency avoiding issues described in QTBUG-30911.
    Issues that appear when Qt was configure with "-no-xkb -xcb-xlib", but
    X server has the XKB extension.

(d) Drop all, but xcb-xinput sources from src/3rdparty/xcb/, for which
    we need "xcb-xinput >= 1.12". This way we can reduce maintenance
    work. The xcb libraries were origianlly bundled because of lack of availability
    on supported distributions. This is not the case anymore:

    CI for Qt 5.13 has:

      Ubuntu 18.04 - libxcb 1.13
      RHEL 7.4 - libxcb 1.13
      openSUSE 15.0 - libxcb 1.13

    CI for Qt 5.12 has:

      Ubuntu 16.04 - libxcb 1.11
      RHEL 7.4 - libxcb 1.13
      openSUSE 42.3 - libxcb 1.11
      RHEL 6.x - not relevant because it was dropped from supported platforms.

Why 1.11 (released on Aug, 2014), but not 1.13 (released on March 2018)?

Based on what we have in CI for 5.13 and 5.14 we could update to 1.13,
but it means that Qt would require a very recent version of 3rd party
dependency.

[ChangeLog][Configure][X11] The minimal required version of libxcb now is 1.11.

[ChangeLog][Third-Party Code][X11] Removed all bundled XCB libs, with
the exception of xcb-xinput, which is not available on systems with
libxcb 1.11.

[ChangeLog][Configure][X11] Removed -qt-xcb, -system-xcb, -xkb, -xcb-xinput switches.

[ChangeLog][Platform Specific Changes][X11] XKB and XInput2 now are mandatory
dependencies for XCB plugin. XCB-XKB is a part of libxcb 1.11 releases.
XCB-XInput is not part of libxcb 1.11 releases, but Qt builders can use
-bundled-xcb-xinput switch.

Fixes: QTBUG-73862
Fixes: QTBUG-73888
Task-number: QTBUG-67277
Task-number: QTBUG-30939
Change-Id: I4c2bd2a0e667220d32fd1fbfa1419c844f17fcce
Reviewed-by: Lars Knoll <lars.knoll@qt.io>

1 files changed, 7 insertions, 17 deletions

diff --git a/src/3rdparty/xcb/qt_attribution.json b/src/3rdparty/xcb/qt_attribution.json
index 30b9af3818..a04e1acdc5 100644
--- a/src/3rdparty/xcb/qt_attribution.json
+++ b/src/3rdparty/xcb/qt_attribution.json
@@ -1,24 +1,14 @@
 {
-    "Id": "xcb",
-    "Name": "XCB",
+    "Id": "xcb-xinput",
+    "Name": "XCB-XInput",
     "QDocModule": "qtgui",
-    "QtUsage": "Optionally used in xcb platform plugin if configured with -qt-xcb.",
-
-    "Description": "Selected xcb libraries.",
+    "QtUsage": "Used in XCB platform plugin if xcb-xinput was not present on the system
+ during Qt configuration or -bundled-xcb-xinput switch was used. To force using xcb-xinput from
+ the system, pass -no-bundled-xcb-xinput.",
+    "Description": "XInput 2 extension for XCB (The X protocol C-language Binding) library.",
     "Homepage": "https://xcb.freedesktop.org/",
     "License": "MIT License",
     "LicenseId": "MIT",
     "LicenseFile": "LICENSE",
-    "Copyright": "Copyright © 2000 Keith Packard
-Copyright © 2006 Jamey Sharp
-Copyright © 2007-2008 Vincent Torri <vtorri@univ-evry.fr>
-Copyright © 2007 Bart Massey
-Copyright © 2008-2009 Julien Danjou <julien@danjou.info>
-Copyright © 2008 Arnaud Fontaine <arnau@debian.org>
-Copyright © 2008 Bart Massey <bart@cs.pdx.edu>
-Copyright © 2008 Ian Osgood <iano@quirkster.com>
-Copyright © 2008 Jamey Sharp <jamey@minilop.net>
-Copyright © 2008 Josh Triplett <josh@freedesktop.org>
-Copyright © 2008 Ulrich Eckhardt <doomster@knuut.de>
-"
+    "Copyright": "Copyright (C) Free Software Foundation, Inc."
 }