[Scons-users] Error when passing from python 3.5.4 to python 3.6

[Mats Wichmann]

On 7/27/20 11:36 AM, Pierre-Luc Boily wrote:
> Posted a question on qt forum about *-impl* option : 
> https://forum.qt.io/topic/117400/user-interface-compiler-uic-qt3-vs-qt4-5-impl-argument-equivalence/4
> 
> It looks like -impl is implicit and not needed anymore.
> 
> So, in the following action : 
> 
> Command 1:
> [['$QT_UIC', '$QT_UICDECLFLAGS', '-o', '${TARGETS[0]}', '$SOURCE'], 
> 
> Command 2 :
> ['$QT_UIC', '$QT_UICIMPLFLAGS', '-impl', '${TARGETS[0].file}', '-o',
> '${TARGETS[1]}', '$SOURCE'], 
> 
> Command 3 :
> ['$QT_MOC', '$QT_MOCFROMHFLAGS', '-o', '${TARGETS[2]}', '${TARGETS[0]}']]  
> 
> 
> Command #2 is completely obsolete for qt4 and qt5.
> 
> Like I said, I find this strange that nobody else raised that before,
> qt4 came up in 2005....  Maybe I am doing something wrong?!  I would
> understand that if someone is still using qt3, Command 2 above is still
> necessary....

Is there a way to reliably do a version check? A number of other tools
do some kind of version check by calling subprocess to run a command and
dig through the result, so there's precedent.

Or is there any actual need to keep the qt3 flag and it could just be
dropped?  Bill would probably demand a deprecation period, but qt3 is
really ancient, we've dropped some other things that were not nearly
that old.