Re: [dpdk-dev] [PATCH] build: add PPC64 Meson build

[Luca Boccassi <bluca@debian.org>]

On Mon, 2018-09-10 at 11:50 +0100, Bruce Richardson wrote:
> On Fri, Sep 07, 2018 at 07:35:02PM +0100, Luca Boccassi wrote:
> > This has been only build-tested for now, on a native ppc64el
> > POWER8E
> > machine running Debian sid.
> > 
> > Signed-off-by: Luca Boccassi <bluca@debian.org>
> > ---
> > The build box cannot be used to run DPDK as it doesn't have
> > supported
> > NICs and root access. Would be great if someone could run-test it,
> > but
> > at this point I think build support is enough to get started.
> > 
> >  config/meson.build                               |  8 ++++++++
> >  config/ppc_64/meson.build                        | 15
> > +++++++++++++++
> >  lib/librte_eal/common/arch/ppc_64/meson.build    |  5 +++++
> >  .../common/include/arch/ppc_64/meson.build       | 16
> > ++++++++++++++++
> >  4 files changed, 44 insertions(+)
> >  create mode 100644 config/ppc_64/meson.build
> >  create mode 100644 lib/librte_eal/common/arch/ppc_64/meson.build
> >  create mode 100644
> > lib/librte_eal/common/include/arch/ppc_64/meson.build
> > 
> > diff --git a/config/meson.build b/config/meson.build
> > index 4d755323f4..8e87b344c2 100644
> > --- a/config/meson.build
> > +++ b/config/meson.build
> > @@ -9,7 +9,13 @@ else
> >  endif
> >  dpdk_conf.set('RTE_MACHINE', machine)
> >  machine_args = []
> > +# ppc64 does not support -march=native
> > +if host_machine.cpu_family().startswith('ppc') and machine ==
> > 'native'
> > +machine_args += '-mcpu=' + machine
> > +machine_args += '-mtune=' + machine
> > +else
> >  machine_args += '-march=' + machine
> > +endif
> 
> Indentation?

Was left in the keyboard

> >  
> >  toolchain = cc.get_id()
> >  dpdk_conf.set_quoted('RTE_TOOLCHAIN', toolchain)
> > @@ -84,6 +90,8 @@ if host_machine.cpu_family().startswith('x86')
> >  	arch_subdir = 'x86'
> >  elif host_machine.cpu_family().startswith('arm') or
> > host_machine.cpu_family().startswith('aarch')
> >  	arch_subdir = 'arm'
> > +elif host_machine.cpu_family().startswith('ppc')
> > +	arch_subdir = 'ppc_64'
> >  endif
> >  subdir(arch_subdir)
> >  dpdk_conf.set('RTE_COMPILE_TIME_CPUFLAGS',
> > ','.join(compile_time_cpuflags))
> > diff --git a/config/ppc_64/meson.build b/config/ppc_64/meson.build
> > new file mode 100644
> > index 0000000000..d6faa7d64f
> > --- /dev/null
> > +++ b/config/ppc_64/meson.build
> > @@ -0,0 +1,15 @@
> > +# SPDX-License-Identifier: BSD-3-Clause
> > +# Copyright(c) 2018 Luca Boccassi <bluca@debian.org>
> > +
> > +# for checking defines we need to use the correct compiler flags
> > +march_opt = '-march=@0@'.format(machine)
> 
> This contradicts the statement above in config/meson.build where you
> state
> that ppc64 doesn't support "-march=native"?

Yeah I copy-pasted the arm file to get started, but it doesn't seem to
me march_opt is used anywhere else other than in the x86 specific file,
so I've dropped that line in v2

-- 
Kind regards,
Luca Boccassi