Re: First go at adding GCC_VERSIONS_ACCEPTED support

[David Sainty <david.sainty%gmail.com@localhost>]

On 10/10/15 10:27, atomicules wrote:
> Perhaps I should have come up with a better subject line when I 
> started this because here's my second attempt at *not* adding 
> GCC_VERSIONS_ACCEPTED support, but instead just seeing if there are 
> any gcc versions installed that are equal to or greater than GCC_REQD 
> and if there is, it uses the highest version available.

I think you're not intending this as something to commit yet, but I just 
want to mention that this style of solution is probably wrong for C++.  
The problem with C++ is that, depending on package build ordering, 
packages may end up linking with multiple stdc++ libraries (and 
including different c++ includes) from different compilers.

The current GCC_REQD behaviour avoids this problem (at a hefty cost).  I 
believe PKGSRC_GCC_MIN also avoids this problem, so long as 
PKGSRC_GCC_MIN doesn't get changed (!?).

This style of solution is probably harmless enough for pure C packages 
though.  The lack of guarantee of a consistent build (consistent 
compiler selection) for a given system configuration worries me, but I 
think that's perhaps just a theoretical worry and perhaps not a 
practical one.