Re: [dpdk-dev] [PATCH v1] build: ccache support for cross build

[Thomas Monjalon <thomas@monjalon.net>]

02/06/2022 11:43, Jerin Jacob:
> On Thu, Jun 2, 2022 at 3:11 PM Bruce Richardson
> <bruce.richardson@intel.com> wrote:
> >
> > On Thu, Jun 02, 2022 at 02:53:55PM +0530, jerinj@marvell.com wrote:
> > > From: Jerin Jacob <jerinj@marvell.com>
> > >
> > > By default, ccache is not used for cross build[1].
> > > Update all cross files to use ccache if it is available
> > > in build machine.
> > >
> > > [1]
> > > https://mesonbuild.com/Machine-files.html
> > >
> > > Signed-off-by: Jerin Jacob <jerinj@marvell.com>
> >
> > Does this still work even if ccache is not available? That's not fully
> 
> Yes.
> 
> > clear from the docs, but it seems to be that if an array is passed the
> > whole array is used as the command, rather than just one element of the
> > array. That would imply that cross-builds now require ccache. Is that
> > acceptable?
> 
> I have removed ccache from the build machine still it works.

I don't understand why it works without ccache.

In general, I would prefer we have a mechanism to update the cross file
on the fly, depending on the setup.
We have this for toolchain prefix name.
The prefix depends on where the toochain comes from.
In a "normal" build system, we set the prefix with an environment variable,
not by writing a file.