Hi,  
  
It looks like  
  
sudo apt-get install libgl1-mesa-dev  


  
  
replaces   
  
sudo apt-get install libgl-mesa-dev  


  
I'm guessing...  
  
cheers  
  
bruce
> > On 2020-03-13, at 6:56 PM, tim Rowledge wrote:  
>  >  
>  > More as it happens...  
>   
>  Well, wasn't *that* fun.  
>   
>  a) sometihng 'interesting' has happened to the CIFS setup connecting my Pi to my iMac; somehow new files (as in stuff downloaded from github or files created and saved by the Pi) cannot be seen by *some* programs; like the asasm assembler for the fast bitblt code. This is goinf to be interesting to find a fix for.  
>   
>  b) as a workaround I copied the vm source tree onto my Pi SSD. Just in case it triggers any idea about the CIFS stuff I'll mention that it failed to handle the directory links relating to the alsa lib stuff  
>   
>  c) As best I recall the makefile/config stuff used to check for openGL include files and wouldn't try to make the B3DAcceleratorPlugin if they were absent. The current makefile tried to make it and that stalled the make and caused assorted other annoyance.  
>   
>  d) after installing (most of) the libraries listed in the HowToBuild (because libgl-mesa-dev is not found?), a clean build makes a vm that fails in the same way as the release vm  
>   
>  So at least we can now debug...  
>   
>  tim  
>  --  
>  tim Rowledge; tim at rowledge.org; http://www.rowledge.org/tim  
>  Useful random insult:- Only playing with 51 cards.
  

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