RE: [PATCH] config: set pkgconfig for ppc64le

[Ali Alnubani <alialnu@nvidia.com>]

> -----Original Message-----
> From: Thomas Monjalon <thomas@monjalon.net>
> Sent: Wednesday, July 13, 2022 12:12 PM
> To: Ali Alnubani <alialnu@nvidia.com>
> Cc: dev@dpdk.org; David Christensen <drc@linux.vnet.ibm.com>
> Subject: Re: [PATCH] config: set pkgconfig for ppc64le
> 
> 13/07/2022 09:39, Ali Alnubani:
> > > -----Original Message-----
> > > From: Thomas Monjalon <thomas@monjalon.net>
> > > Sent: Monday, July 11, 2022 11:11 PM
> > > To: Ali Alnubani <alialnu@nvidia.com>
> > > Cc: dev@dpdk.org; David Christensen <drc@linux.vnet.ibm.com>
> > > Subject: Re: [PATCH] config: set pkgconfig for ppc64le
> > >
> > > + PPC maintainer
> > >
> > > 07/07/2022 13:41, Ali Alnubani:
> > > > Meson fails to detect the dependencies that are included
> > > > in PKG_CONFIG_PATH and built for ppc64le if binaries.pkgconfig
> > > > is not set in the ppc64le cross-file for Ubuntu.
> > > >
> > > > This fixes the issue by setting binaries.pkgconfig to the
> > > > binary provided by the package 'pkg-config-powerpc64le-linux-gnu'.
> > > >
> > > > Signed-off-by: Ali Alnubani <alialnu@nvidia.com>
> > > > ---
> > > >  config/ppc/ppc64le-power8-linux-gcc-ubuntu | 1 +
> > >
> > > Why not adding the same for ppc64le-power8-linux-gcc?
> > >
> > > > +pkgconfig = 'powerpc64le-linux-gnu-pkg-config'
> >
> > I didn't find any operating systems that distribute the powerpc64le cross-
> compiler with the binary names found in config/ppc/ppc64le-power8-linux-
> gcc.
> > Both Ubuntu and Fedora use the -gnu suffix. Fedora doesn't seem to have
> a pkg-config binary for powerpc64le though.
> 
> So how does it work on Fedora?
> 

On Fedora, the pcc64 cross-compiler is provided by package 'gcc-powerpc64le-linux-gnu' with binary names /usr/bin/powerpc64le-linux-gnu-*, same as in Ubuntu.
The cross-file config/ppc/ppc64le-power8-linux-gcc doesn't work with Fedora since the binary names in the file don't have the -gnu suffix, so I'm not sure where this cross-file is being used.

Another issue I found is that when I set the correct binary names in config/ppc/ppc64le-power8-linux-gcc or use config/ppc/ppc64le-power8-linux-gcc-ubuntu, I get the following error on Fedora:
    config/ppc/meson.build:6:4: ERROR: Problem encountered: Only 64-bit compiles are supported for this platform type
It happens because cc.sizeof('void *') in https://git.dpdk.org/dpdk/tree/config/meson.build#n144 returns '-1'. I'm on Fedora 35.

Is anyone able to cross-build for ppc64le in Fedora?