[Development] Werror check for headers causing FTBFS in sparc (cast-align)

[Lisandro Damián Nicanor Pérez Meyer]

Hi! I've hitted a FTBFS in sparc while building qtsvg-opensource-src (by 
enabling the tests):

  /usr/include/qt5/QtCore/qhash.h:283:45: error: cast from 'QHashData::Node*'
  to 'QHash<QString, QVariant>::Node* {aka QHashNode<QString, QVariant>*}'
  increases required alignment of target type [-Werror=cast-align]

The full build log can be read here:

<https://buildd.debian.org/status/fetch.php?pkg=qtsvg-opensource-src&arch=sparc&ver=5.2.0-1&stamp=1387521942>

If I understand correctly Werror gets defined in 
qtbase/mkspecs/features/qt_headersclean.prf to check that public API abides 
certain rules.

Fixing this would be simple for me (distro-wide), just removing 
qtsvg/tests/auto/headersclean/* before building the package, but I would like 
to know if this kind of error is between the ones you want to catch in the 
public headers. If not, maybe adding -Wno-error=cast-align to 
qt_headersclean.prf could be a good idea.

Kinds regards, Lisandro.


-- 

Lisandro Damián Nicanor Pérez Meyer
http://perezmeyer.com.ar/
http://perezmeyer.blogspot.com/
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