how does -no-qt3support help distro-independence of statically linked programs?

Over at the wiki page about statically compiling Qt 4 / X11 it says that -no-qt3support is useful for making a statically linked Qt 4 program more widely usable.

Though I understand that -qt-zlib etc tell Qt to use its own internal zlib-etc libraries and hence not require that a system on which this program may be used must have the zlib library installed, how does -no-qt3support help towards this end?

Thank you.

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Originally Posted by jamadagni

how does -no-qt3support help towards this end?

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Probably it doesn't. Most likely it was there just because it might reduce the executable size.