Hi, qreal is a Qt typedef that used to be defined as float on ARM and double on all other platforms.
However, since Qt 5.2 release candidate 1, qreal is double everywhere (in Debian we are considering to keep it double on armel, but that isn’t relevant to Ubuntu). Please be prepared to update your packages if they rely on the old behaviour. We will probably need to do a transition (i.e. rebuild everything that has armhf binaries), however the problem is that upstream did not bump the SONAME of Qt libraries, so we are considering doing the bump as a Debian/Ubuntu-specific change. Feel free to express your opinion about (not) bumping the SONAME at http://bugs.debian.org/731261 (that bug also contains links to previous discussions on this subject). -- Dmitry Shachnev
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