Re: First go at adding GCC_VERSIONS_ACCEPTED support

[atomicules <base%atomicules.co.uk@localhost>]

Hi Greg,

thanks very much for so much feedback.

On 25-Sep-2015 11:14:41, Greg Troxel wrote:
> * New versions keep appearing.  It's at best awkward to have to go edit
>  packages to say the new version is ok, and in practice it isn't going
>  to happen.

Good point.

> That could lead us to:
>
>  GCC_REQD = (lowest versions that is ok, must be just one)
>
>  GCC_INCOMPATIBLE = (list of vesrions > REQD that are not ok)

Ok. Well, if you don't mind me bumbling along I'll carry on and make 
changes based on that idea. I'll just do things in small steps and 
post here for help and feedback.

> This approach would have the side effect of causing most packages 
> with GCC_REQD=4.5, for example, to be ok with a 4.8 compiler.
> This is actually what's documented already in
> mk/compiler/gcc.mk, but it seems that it doesn't do it.

Sorry, you've lost me here. I don't follow where this is documented or 
what you mean by GCC_REQD=4.5 being ok with 4.8. Is this a known 
thing, that anything that compiles under 4.5 can go up to 4.8, but 
anything above that is questionable?