[135847] trunk/dports/science/volk

[Michael Dickens]

Thanks for the pointers on using {} only when using [] but not *; I'll
update the Portfile shortly. I prefer to be "transparent" in compiler
selection, so blacklisting even compilers that won't be chosen is better
than not & really does no harm.

As for using the compiler_blacklist_versions, there is a line in the
cxx11 variant that reads:
{{{
        compiler.blacklist-append *gcc* {clang < 500}
}}}

Isn't the 2nd part what this PortGroup is used for? Or, am I mistaken
here? If so, then I'll move the PortGroup inclusion to just inside that
clause. Thanks! - MLD

On Tue, May 5, 2015, at 05:36 PM, Lawrence Velázquez wrote:
> On May 5, 2015, at 2:49 PM, Ryan Schmidt <ryandesign at macports.org> wrote:
> 
> > It doesn't look like you're using the capabilities of the compiler_blacklist_versions portgroup here.
> 
> Doesn't look like it, so the portgroup is unnecessary.
> 
> > In the context of Tcl I'm unfamiliar with the "[3-6]" notation that you're using so I'm not sure how or if that works.
> 
> The elements of compiler.blacklist are treated as patterns for "string
> match", which closely resemble shell globs.
> 
> http://www.tcl.tk/man/tcl8.5/TclCmd/string.htm#M39
> 
> So this matches (and thus blacklists) GCC 4.0, 4.1, and 4.2:
> 
>     compiler.blacklist {*gcc-4.[0-2]}
> 
> > If it works, then I understand the use of curly brackets to quote them, because otherwise the square brackets would be interpreted as a request to run a Tcl procedure.
> 
> Right. Asterisks and hyphens don't have to be quoted, but brackets do.
> 
> > Blacklisting gcc 4.3 and greater is probably never needed since there is no circumstance in which MacPorts would have chosen that compiler anyway.
> 
> I've done this before in the name of thoroughness, but it's generally not
> necessary.