catch linker warnings in some config tests

Forwarded: https://codereview.qt-project.org/163214 (rejected)
Bug: https://bugs.debian.org/827935
Last-Update: 2019-03-02

Without this, qmake wrongly thinks that the tests succeed, for example:

./config.tests/unix/futimens/futimens.cpp:44: warning: futimens is not implemented and will always fail
test config.corelib.tests.futimens succeeded

Gbp-Pq: Name gnukfreebsd_linker_warnings.diff

build ibase sql plugin against firebird

Forwarded: no
Last-Update: 2017-06-30

Gbp-Pq: Name link_fbclient.diff

remove non-used privacy-breach code

Forwarded: not-needed
Last-Update: 2015-02-18

This code makes Lintian unhappy. But we are really not using it, it only
gets inserted when building the online doc.
Anyways the best way to calm down Lintian is to simply remove it.

Gbp-Pq: Name remove_privacy_breaches.diff

disable htmlinfo example which contains non-free files

Forwarded: not-needed
Last-Update: 2014-12-17

Gbp-Pq: Name no_htmlinfo_example.diff

Initial GNU/kFreeBSD support

Last-Update: 2015-06-03
Forwarded: no

- add a gnukfreebsd-g++ qmake mkspec, mostly copied from the hurd-g++ one
- properly use LD_LIBRARY_PATH on GNU/* systems

Gbp-Pq: Name gnukfreebsd.diff

Avoid use-after-free in QXcbConnection::initializeScreens()

Origin: upstream, https://code.qt.io/cgit/qt/qtbase.git/commit/?id=86b8c5c3f32c2457
Last-Update: 2020-11-23

Gbp-Pq: Name xcb_screens_uaf.patch

ask clone() to use the SIGCHLD as the termination signal

Origin: upstream, https://code.qt.io/cgit/qt/qtbase.git/commit/?id=a82032351c921c3d
Last-Update: 2020-11-19

Because of these lines in the Linux kernel (kernel/fork.c, see [1][3]):

    if (clone_flags & CLONE_VFORK)
        trace = PTRACE_EVENT_VFORK;
    else if (args->exit_signal != SIGCHLD)
        trace = PTRACE_EVENT_CLONE;
    else
        trace = PTRACE_EVENT_FORK;

Without CLONE_VFORK (which we can't use), if the exit signal isn't
SIGCHLD, the debugger will get a PTRACE_EVENT_CLONE, which makes it
think the process we're starting is a thread, not a new process. Both
gdb and lldb remain attached to the child and when it later performs an
execve(), they get mightily confused. See gdb bug report[5].

The idea of not having an exit_signal was so that no SIGCHLD would be
delivered to the parent process in the first place. That way, some
misguided SIGCHLD handler (*cough* GLib *cough*) wouldn't reap our
processes. Unfortunately, what I didn't realize was that the kernel
sends SIGCHLD anyway (see [2][4]), so this defensive measure didn't
actually work. Consequently, we can pass SIGCHLD to clone() and get the
debuggers working again.

[1] https://code.woboq.org/linux/linux/kernel/fork.c.html#_do_fork
[2] https://code.woboq.org/linux/linux/kernel/signal.c.html#do_notify_parent
[3] https://elixir.bootlin.com/linux/v5.8/source/kernel/fork.c#L2432
[4] https://elixir.bootlin.com/linux/v5.8/source/kernel/signal.c#L1925
[5] https://sourceware.org/bugzilla/show_bug.cgi?id=26562

Gbp-Pq: Name clone_sigchld.diff

emit QScreen::geometryChanged when the logical DPI changes

Origin: upstream, https://code.qt.io/cgit/qt/qtbase.git/commit/?id=5c7307775d32ae0a
Last-Update: 2020-09-30

Add the missing call to QScreenPrivate::emitGeometryChangeSignals()
along with an emission of physicalDotsPerInchChanged()
since that is calculated from geometry and physical size.

Rearrange the code in
QGuiApplicationPrivate::processScreenGeometryChange()
to prevent duplicate emissions of geometryChanged(),
physicalDotsPerInchChanged() which this change would introduce.

Gbp-Pq: Name emit_geometry_changed.diff

qtbase-opensource-src (5.15.1+dfsg-4) unstable; urgency=medium

  [ Alexander Volkov ]
  * Backport upstream patch xcb_screens_uaf.patch in order to fix
    use-after-free in the xcb plugin.

[dgit import unpatched qtbase-opensource-src 5.15.1+dfsg-4]

Import qtbase-opensource-src_5.15.1+dfsg-4.debian.tar.xz

[dgit import tarball qtbase-opensource-src 5.15.1+dfsg-4 qtbase-opensource-src_5.15.1+dfsg-4.debian.tar.xz]

Import qtbase-opensource-src_5.15.1+dfsg.orig.tar.xz

[dgit import orig qtbase-opensource-src_5.15.1+dfsg.orig.tar.xz]