Re: [dpdk-dev] [PATCH v5 2/2] build: add support for detecting march on ARM

[Pavan Nikhilesh <pbhagavatula@caviumnetworks.com>]

On Mon, Jan 22, 2018 at 12:30:53PM +0000, Bruce Richardson wrote:
> On Mon, Jan 22, 2018 at 05:16:49PM +0530, Pavan Nikhilesh wrote:
> > Added support for detecting march and mcpu by reading midr_el1 register.
> > The implementer, primary part number values read can be used to figure
> > out the underlying arm cpu.
> >
> > Signed-off-by: Pavan Nikhilesh <pbhagavatula@caviumnetworks.com>
> > ---
> >  app/test-pmd/meson.build    |  2 +-
> >  config/arm/armv8_machine.py | 18 +++++++++
> >  config/arm/meson.build      | 95 +++++++++++++++++++++++++++++++++++++++++----
> >  config/meson.build          | 19 ++++-----
> >  drivers/meson.build         |  2 +-
> >  examples/meson.build        |  2 +-
> >  lib/meson.build             |  2 +-
> >  meson.build                 |  2 +-
> >  test/test/meson.build       |  2 +-
> >  9 files changed, 121 insertions(+), 23 deletions(-)
> >  create mode 100755 config/arm/armv8_machine.py
> >
<snip>
> > +
> > +	if machine == 'generic'
> > +		machine = impl_generic
> > +		cmd_output = cmd_generic
> > +	endif
> > +
> > +	message('Implementer : ' + machine[0])
>
> When cross-compiling for arm I get an error at this line:
>
>   Meson encountered an error in file config/arm/meson.build, line 69, column 1:
>   Index 0 out of bounds of array of size 0.
>
Will be sending v2 of the cross patch soon(once directory structure and file
name is fininlized) that would resolve this issue.

> Regards,
> /Bruce

Thanks,
Pavan.
>
>