[cfe-dev] Qt 4.7.3 moc and libc++

Ashok Nalkund ashoknn at qualcomm.com
Mon Sep 10 13:47:49 PDT 2012

Hi All,
   I've compiled Qt 4.7.3 (yes, its an older version but 4.8 has a few 
issues) with clang + libc++. When I compile one of my resource files 
using Qt's moc, it reports:
> ...x86_64-centos-linux-clang-libcxx/include/QtCore/QObjec:0: Warning: No relevant classes found. No output generated.

I traced it to the presence of libc++ include path in the compilation:

> -Ix86_64-centos-linux-clang-libcxx/include

which is the location of libc++ headers. If I remove that include path, 
moc works fine and generates the expected output.

   Has anybody seen this? I'm posting to the Qt's forums also to see if 
they know about this.


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