Qt 5.2 fails to build on Solaris 10

Qt 5.2 (and previous 5 versions) does not build on Solaris. I managed to fix some issues such that it is successfully built and normal Qt programs work.

You can find the patches and some comments on them under:

http://stackoverflow.com/a/20879716/427158

I think that some patches are easy to adopt - and also increase the portability of the code for other platforms.

Other patches are more Solaris specific (e.g. to get the stack-size for the java-script engine) - but are protected by a platform specific CPP construct.

The fix for using a POSIX-conforming shell is more like a Solaris-specific workaround - in the comments is a method described how to find a shell in a truly portable way. But for this you would have to make the shell configurable via something like a mkspec file - and avoid using it in shell-script bang lines - cf. also QTBUG-28857.