Re: [dpdk-dev] [PATCH 1/2] mk: overriding CC also overrides HOSTCC

["Richardson, Bruce" <bruce.richardson@intel.com>]

> -----Original Message-----
> From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Richardson, Bruce
> Sent: Tuesday, June 24, 2014 10:22 AM
> To: Thomas Monjalon
> Cc: dev@dpdk.org
> Subject: Re: [dpdk-dev] [PATCH 1/2] mk: overriding CC also overrides HOSTCC
> 
> > -----Original Message-----
> > From: Thomas Monjalon [mailto:thomas.monjalon@6wind.com]
> > Sent: Tuesday, June 24, 2014 2:39 AM
> > To: Richardson, Bruce
> > Cc: dev@dpdk.org
> > Subject: Re: [dpdk-dev] [PATCH 1/2] mk: overriding CC also overrides HOSTCC
> >
> > Hi Bruce,
> >
> > 2014-06-24 01:23, Bruce Richardson:
> > > when overriding the CC variable on the commandline, the HOSTCC value
> > > was remaining at "gcc", which caused errors on Free BSD10 when using a gcc
> > > as e.g. gcc48, without a binary just called "gcc". This change overrides
> > > HOSTCC when CC is overridden, which means that setting CC=gcc48, will
> > > now also set HOSTCC=gcc48, allowing the "testhost" app to compile on
> BSD10
> >
> > So you are mixing CC and HOSTCC which would break cross-compilation.
> > Why don't you set HOSTCC on command line?
> >
> 
> Because I shouldn't need to set HOSTCC unless I am cross compiling and need a
> different CC and HOSTCC. If my compiler is called "gcc48", and I tell the build
> system that my compiler is called "gcc48", it should use that value everywhere in
> place of gcc, unless I also tell it that my HOSTCC should be something
> completely different. This patch only affects HOSTCC if you specify CC on the
> command-line to override that value, otherwise things are left as they are.
> If you do want to override CC and do cross compiling with a separate HOSTCC
> that can be done too, by overriding HOSTCC also, i.e. CC=x HOSTCC=y. For those
> not cross compiling, they should never need to know about HOSTCC at all.

Is the above explanation clear enough? Anyone any other comments or care to ack the patch. I think this is really needed to make it easy to use v1.7 on BSD 10, which has no gcc by default.

/Bruce