[dpdk-dev] [PATCH] build: support i686 target on x86 64-bit hosts

[Lance Richardson]

On Fri, Sep 25, 2020 at 5:13 AM Bruce Richardson
<bruce.richardson at intel.com> wrote:
>
> On Thu, Sep 24, 2020 at 12:37:42PM -0400, Lance Richardson wrote:
> > Add meson cross files for building i686 targets using gcc on x86_64
> > linux hosts.
> >
> > Uusage example:
> >
> >     meson --cross-file config/x86/cross-i686-linux-gcc build-i686
> >     ninja -C build-i686
> >
> > Signed-off-by: Lance Richardson <lance.richardson at broadcom.com>
> > ---
> > Red Hat distros use a different name for the 32-bit pkg-config
> > command from most other distros, maybe there is a better way
> > to handle this than using separate files.
> >
> > Others will probably have better naming suggestions for the files.
> >
> Just to note that rather than using cross-files, building i686 on x86_64
> should be possible by just setting environment variables.
>
> For example, on Ubuntu 20.04, this works for me:
>
> PKG_CONFIG_LIBDIR=/usr/lib/i386-linux-gnu/pkgconfig CFLAGS='-m32' LDFLAGS='-m32' meson --werror build-32bit
> ninja -C build-32bit/
>
> For Fedora or Redhat system the PKG_CONFIG_LIBDIR will be different (I
> think just /usr/lib/pkgconfig), but the rest should work identically.
>
> /Bruce

Thanks, that does work, although I'll have some trouble remembering it
for future
use (unlike using cross-files). Googling for "PKG_CONFIG_LIBDIR meson dpdk"
did lead me to this discussion, which makes it sound like cross-files
might still
worthy of consideration:

   https://patches.dpdk.org/patch/69067/

   Lance