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, 0 insertions, 71 deletions

diff --git a/src/3rdparty/xcb/include/xcb/xcb_keysyms.h b/src/3rdparty/xcb/include/xcb/xcb_keysyms.h
deleted file mode 100644
index 9d34a50ad1..0000000000
--- a/src/3rdparty/xcb/include/xcb/xcb_keysyms.h
+++ /dev/null
@@ -1,71 +0,0 @@
-#ifndef __XCB_KEYSYMS_H__
-#define __XCB_KEYSYMS_H__
-
-#include <xcb/xcb.h>
-
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-
-typedef struct _XCBKeySymbols xcb_key_symbols_t;
-
-xcb_key_symbols_t *xcb_key_symbols_alloc        (xcb_connection_t         *c);
-
-void           xcb_key_symbols_free         (xcb_key_symbols_t         *syms);
-
-xcb_keysym_t      xcb_key_symbols_get_keysym    (xcb_key_symbols_t         *syms,
-					  xcb_keycode_t             keycode,
-					  int                    col);
-
-/**
- * @brief Get the keycodes attached to a keysyms.
- * There can be several value, so what is returned is an array of keycode
- * terminated by XCB_NO_SYMBOL. You are responsible to free it.
- * Be aware that this function can be slow. It will convert all
- * combinations of all available keycodes to keysyms to find the ones that
- * match.
- * @param syms Key symbols.
- * @param keysym The keysym to look for.
- * @return A XCB_NO_SYMBOL terminated array of keycode, or NULL if nothing is found.
- */
-xcb_keycode_t * xcb_key_symbols_get_keycode(xcb_key_symbols_t *syms,
-                                            xcb_keysym_t keysym);
-
-xcb_keysym_t      xcb_key_press_lookup_keysym   (xcb_key_symbols_t         *syms,
-					  xcb_key_press_event_t      *event,
-					  int                    col);
-
-xcb_keysym_t      xcb_key_release_lookup_keysym (xcb_key_symbols_t         *syms,
-					  xcb_key_release_event_t    *event,
-					  int                    col);
-
-int            xcb_refresh_keyboard_mapping (xcb_key_symbols_t         *syms,
-					  xcb_mapping_notify_event_t *event);
-
-/* TODO:  need XLookupString equivalent */
-
-/* Tests for classes of symbols */
-
-int xcb_is_keypad_key        (xcb_keysym_t keysym);
-
-int xcb_is_private_keypad_key (xcb_keysym_t keysym);
-
-int xcb_is_cursor_key        (xcb_keysym_t keysym);
-
-int xcb_is_pf_key            (xcb_keysym_t keysym);
-
-int xcb_is_function_key      (xcb_keysym_t keysym);
-
-int xcb_is_misc_function_key  (xcb_keysym_t keysym);
-
-int xcb_is_modifier_key      (xcb_keysym_t keysym);
-
-
-#ifdef __cplusplus
-}
-#endif
-
-
-#endif /* __XCB_KEYSYMS_H__ */