[LyX/master] Cmake build: Start demanding at least version 5.1 if compiling with gcc

[Kornel Benko]

Am Mon, 4 Nov 2024 18:32:27 +0100
schrieb Jean-Marc Lasgouttes <lasgouttes at lyx.org>:

> Le 04/11/2024 à 18:29, Jean-Marc Lasgouttes a écrit :
> > Le 25/10/2024 à 08:23, Pavel Sanda a écrit :  
> >> Googling around
> >> 16.04 has Qt 5.5.1 & Python 3.5 & gcc 5.4 available even if not default.
> >> 18.04 has Qt 5.9.5 & Python 3.6 & gcc 7.5 available
> >>
> >> We did unnecessarily drastic cut.
> >> We can require gcc 7 only, but I think you just killed support Qt 
> >> 5.9.5 anyway?  
> > 
> > With my latest commits, we now support Ubuntu 18.04, which actually has 
> > python 3.8 in its repositories.
> > 
> > Everything compiles fine with gcc 7 and Qt 5.9.5.  
> 
> Kornel, I did not modify CMake stuff for the Qt version (and I do not 
> know whether CMake 3.10, which is available with Ubuntu 18.04 is good 
> enough for 2.5.
> 
> JMarc
> 

This cmake version should be OK. We require only version 3.5.

gcc >= 7 and qt >= 5.9.5 with cmake committed at c5d6f2ea.

	Kornel

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