bksys/generic.py cleanup

[Christian Ehrlicher]

Ralf Habacker schrieb:

> Hi all,
> 
> when I create a Makefile for qt's examples (for example 
> examples\network\blockingfortuneclient) and compare the resulting 
> preprocesser definitions I see three definitions, which are not covered 
> by recent detect_qt4.py
> 
> -DQT_DLL -DQT_THREAD_SUPPORT -DQT_NEEDS_QMAIN
> 
> I suggest to set this in env['CXXFLAGS_QT']. Are there any problems to 
> expect ?
QT_NEEDS_QMAIN is only for g++/win32 and borland - see windows.prf:
    win32-g++:DEFINES += QT_NEEDS_QMAIN
    win32-borland:DEFINES += QT_NEEDS_QMAIN

QT_THREAD_SUPPORT is only for win32 - but don't know if this isn't
obsolete - or can qt4 be build without thread support?
This define isn't used anywhere in qt4/src

QT_DLL win32 only too, only for libraries -> sets correct
__declspec(dllimport) but should work without too (only dllexport is
really needed)

Christian

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