@twobob: If you're looking at Qt4, I think they're starting/planning to require a somewhat recent C++ compiler (GCC 4.5/4.6, clang 3/4 ?) to make use of some nifty C++11/C++0x features... It's possibly 'worse' with Qt5
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So, yeah, might have better success with a custom self-built TC based on GCC 4.[678], although the ABI compatibility dance might get a bit tricky... (I've never tried building Qt with my usual GCC 4.7/Glibc 2.9 TC, so I can't be more specific, but, it's C++, so, here be dragons...).