[PATCH v3 2/2] build: export dpdk_includes for subproject usage.

[Bruce Richardson]

On Thu, Oct 13, 2022 at 05:35:39PM +0200, Markus Theil wrote:
> From: Thorben Roemer <thorben.roemer at secunet.com>
> 
> In order to perform things like LTO more easily in
> our DPDK applications, we use DPDK as a meson subproject.
> Also export includes in order to be usable in this context.
> 
> Signed-off-by: Thorben Roemer <thorben.roemer at secunet.com>
> ---
>  drivers/baseband/fpga_5gnr_fec/meson.build | 2 ++
>  drivers/dma/dpaa2/meson.build              | 2 ++
>  drivers/event/dlb2/meson.build             | 2 ++
>  drivers/mempool/dpaa2/meson.build          | 2 ++
>  drivers/net/atlantic/meson.build           | 2 ++
>  drivers/net/bnxt/meson.build               | 2 ++
>  drivers/net/bonding/meson.build            | 2 ++
>  drivers/net/cnxk/meson.build               | 2 ++
>  drivers/net/dpaa/meson.build               | 2 ++
>  drivers/net/dpaa2/meson.build              | 2 ++
>  drivers/net/i40e/meson.build               | 2 ++
>  drivers/net/iavf/meson.build               | 2 ++
>  drivers/net/ixgbe/meson.build              | 2 ++
>  drivers/net/memif/meson.build              | 2 ++
>  drivers/net/mlx5/meson.build               | 2 ++
>  drivers/net/ring/meson.build               | 2 ++
>  drivers/net/softnic/meson.build            | 2 ++
>  drivers/net/vhost/meson.build              | 2 ++
>  drivers/raw/cnxk_bphy/meson.build          | 2 ++
>  drivers/raw/cnxk_gpio/meson.build          | 2 ++
>  drivers/raw/dpaa2_cmdif/meson.build        | 2 ++
>  drivers/raw/ifpga/meson.build              | 2 ++
>  drivers/raw/ntb/meson.build                | 2 ++
>  lib/meson.build                            | 1 +
>  meson.build                                | 1 +
>  25 files changed, 48 insertions(+)
> 

Rather than changing all these meson.build files, I think we should be able
to check in drivers/meson.build if the "headers" array is empty. If not,
then add the include path, otherwise skip it.

/Bruce