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

[Bruce Richardson <bruce.richardson@intel.com>]

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@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