touch-packages team mailing list archive

[Timo Jyrinki <timo.jyrinki@xxxxxxxxxxxxx>]

Just omitting "-reduce-relocations" doesn't change anything. For
reference, http://paste.ubuntu.com/11431050/ lists the changes that I
tried first - enabling the four commented out patches, modifying the
enable_pie.patch accordingly which is actually also from upstream even
though listed as being Ubuntu specific, and adding the gcc5.patch.

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https://bugs.launchpad.net/bugs/1403758

Title:
  Unity8 shows black screen with Qt 5.4.0

Status in binutils package in Ubuntu:
  New
Status in gcc-defaults package in Ubuntu:
  New
Status in qtbase-opensource-src package in Ubuntu:
  Fix Released
Status in ubuntu-ui-toolkit package in Ubuntu:
  Invalid
Status in unity8 package in Ubuntu:
  Fix Released

Bug description:
  With bug #1403511 taken care of in Qt, apps do not anymore crash with
  Qt 5.4 and device does not anymore go into reboot loop. However,
  nothing is visible on the screen.

  It seems unity8, unity8-dash etc are all running. unity8.log attached

  05/2015 status:
  - We require at least -fPIE on arm for QObject::connect to work, but on the other hand -fPIC armhf is broken like described in this bug
  - Upstream is moving to require -fPIC while banning -fPIE, which means we should move to -fPIC too and use -reduce-relocations (requires -fPIC from now on) on all archs

  Relevant upstream links referring GCC5 as the reason to require -fPIC:
  http://code.qt.io/cgit/qt/qtbase.git/commit/?id=36d6eb721e7d5997ade75e289d4088dc48678d0d
  http://code.qt.io/cgit/qt/qtbase.git/commit/?id=3eca75de67b3fd2c890715b30c7899cebc096fe9

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