Updating GCC

[RW]

On Thu, 22 Mar 2007 14:18:03 -0700 (PDT)
youshi10 at u.washington.edu wrote:

> On Thu, 22 Mar 2007, White Hat wrote:
> 
> > --- Chuck Swiger <cswiger at mac.com> wrote:
> >
> >> On Mar 22, 2007, at 12:34 PM, White Hat wrote:
> >>>> Add:
> >>>>
> >>>> CC?=	/usr/local/bin/gcc
> >>>> CXX?=	/usr/local/bin/g++
> >>>>
> >>>> ...to /etc/make.conf.  You might also find
> >> looking
> >>>> at /usr/ports/Mk/
> >>>> bsd.gcc.mk to be informative...
> >>>
> >>> Thanks! One other question; why the '?' mark? I
> > was
> >>> Googling for information on gcc, and it listed
> >> 'cxx='
> >>> sans a question mark in it.
> >>
> >> It means "set CC to this value if it's not already
> >> set to something".
> >>
> >> Some ports already know they need a newer version of
> >> gcc (using
> >> "USE_GCC="), and the "make world" infrastructure to
> >> rebuild the
> >> kernel/userland need to use the system-provided
> >> compiler, so using
> >> the question mark lets things which know better use
> >> the exact
> >> compiler they want.
> >
> > Thanks! I could not find that information anywhere,
> > although I am sure it does exist.
> 
> Does the make.conf manpage need to be updated? It doesn't appear to
> reference either USE_GCC= or CC= or CXX= at all.. -Garrett
> 
From the porters' Handbook 

"Note: It is always incorrect to set any USE_* in /etc/make.conf."