[dpdk-dev] [PATCH 2/2] config: allow overriding some build defaults

[Ma, LihongX]

Tested-by: lihongx Ma<lihongx.ma at intel.com>
Before apply this patchset, set config like DRTE_LIBRTE_I40E_QUEUE_NUM_PER_VM=8 will failed,
After apply this patchset, the the meson build can work find.
Cmd like below:
meson -Denable_kmods=True -Dlibdir=lib --default-library=static -Dexamples=vmdq_dcb -Dc_args='-DRTE_LIBRTE_I40E_QUEUE_NUM_PER_VM=8' config-test1
ninja -C config-test1

Regards,
Ma,lihong

> -----Original Message-----
> From: dev <dev-bounces at dpdk.org> On Behalf Of Bruce Richardson
> Sent: Tuesday, August 25, 2020 7:45 PM
> To: dev at dpdk.org
> Cc: bluca at debian.org; Richardson, Bruce <bruce.richardson at intel.com>
> Subject: [dpdk-dev] [PATCH 2/2] config: allow overriding some build
> defaults
> 
> In case a developer uses CFLAGS to set different default values for the
> defines in the rte_config.h file, use #ifndef / #endif guards around the
> setting of those values. For those lines just "defining" a macro without
> assigning it a value to be used by code, drop the value argument (where
> possible) to make it clearer that that is what is happening, since those
> don't need the #ifdef guard.
> 
> Signed-off-by: Bruce Richardson <bruce.richardson at intel.com>
> ---
>  config/rte_config.h | 110 +++++++++++++++++++++++++++++++++++++++-----
>  1 file changed, 99 insertions(+), 11 deletions(-)
> 
> diff --git a/config/rte_config.h b/config/rte_config.h index