ports / Makefile / check if default compiler is GCC and version is 4.2+

[Andras Horvath]

There is something similar here:
http://lists.freebsd.org/pipermail/freebsd-ports-bugs/2013-August/259882.html

I put that like the following. Does this seem ok? I tested it on 8 stable and 10 current and seems to work just fine:

CCISCLANG!= ${CC} --version
.if empty(CCISCLANG:M*clang*)
...
.endif



On Sat, 5 Oct 2013 15:18:03 +0200
Baptiste Daroussin <bapt at FreeBSD.org> wrote:

> On Sat, Oct 05, 2013 at 02:44:27PM +0200, Andras Horvath wrote:
> > Dear Members,
> > 
> > I'd like to ask your help. I'm a developer and maintainer of a port and I intend to give different compile options for different compilers when building my software. I'm using the OpenMP feature of GCC that is available from GCC version 4.2 and above.
> > 
> > I would like to know how I could determine in my Makefile whether the default compiler is GCC and it's version is >= 4.2 ?
> > 
> > I'd like to go with the preffered standard way.
> > 
> > Does it make any sense to try to support GCC version lower than 4.2? If not, I reckon it would be enough for me to check against GCC only without its version. If so, then would this be enough? :
> > 
> > .if ${CC} == "gcc"
> > 
> > 
> It doesn't make sense, $[CC} == "gcc" is not enough at all for that, if you
> Some patches allowing to better play with different compilers is coming.
> 
> regards,
> Bapt