Re: [dpdk-dev] [PATCH v1 2/2] mk: add sensible default target with defconfig

[Shreyansh Jain <shreyansh.jain@nxp.com>]

Hello David,

On Tuesday 23 May 2017 03:58 PM, David Hunt wrote:
> Users can now use 'make defconfig' to generate a configuration using
> the most appropriate defaults for the current machine.
>
> <arch-machine-execenv-toolchain>
>   arch taken from uname -m
>   machine defaults to native
>   execenv is taken from uname, Linux=linuxapp, otherwise bsdapp
>   toolchain is taken from $CC -v to see which compiler to use
>
> Signed-off-by: David Hunt <david.hunt@intel.com>
> ---
>  mk/rte.sdkconfig.mk | 15 ++++++++++++---
>  mk/rte.sdkroot.mk   |  4 ++--
>  2 files changed, 14 insertions(+), 5 deletions(-)
>
> diff --git a/mk/rte.sdkconfig.mk b/mk/rte.sdkconfig.mk
> index 1f2d6bd..4f30d56 100644
> --- a/mk/rte.sdkconfig.mk
> +++ b/mk/rte.sdkconfig.mk
> @@ -60,16 +60,25 @@ showconfigs:
>
>  .PHONY: notemplate
>  notemplate:
> -	@printf "No template specified. "
> -	@echo "Use T=template among the following list:"
> +	@printf "No template specified. Use 'make defconfig' or "
> +	@echo "use T=template from the following list:"
>  	@$(MAKE) -rR showconfigs | sed 's,^,  ,'
>
> +
> +.PHONY: defconfig
> +defconfig:
> +	@$(MAKE) config T=$(shell uname -m)-native-$(shell uname | \

The idea to have 'make defconfig' do the works looks great to me.
I am just worried about the above line - it wouldn't allow
configurations like
arm64-dpaa2-linuxapp-gcc or arm64-armv8a-linuxapp-gcc
Basically, having the MACHINE default to 'native' would not be right in 
all cases.

But, I don't have a better idea about how to detect this automatically.
Or, we might use RTE_MACHINE someway.

> +		awk '{ if ($$0 == "Linux") {print "linuxapp"} else \
> +		{print "bsdapp"} }')-$(shell ${CC} -v 2>&1 \
> +		| grep " version " | cut -d ' ' -f 1)
> +
>  .PHONY: config
>  ifeq ($(RTE_CONFIG_TEMPLATE),)
>  config: notemplate
>  else
>  config: $(RTE_OUTPUT)/include/rte_config.h $(RTE_OUTPUT)/Makefile
> -	@echo "Configuration done"
> +	@echo "Configuration done using "$(shell basename \
> +		$(RTE_CONFIG_TEMPLATE) | sed "s/defconfig_//g")
>  endif
>
>  $(RTE_OUTPUT):
> diff --git a/mk/rte.sdkroot.mk b/mk/rte.sdkroot.mk
> index 9bdaf20..8019603 100644
> --- a/mk/rte.sdkroot.mk
> +++ b/mk/rte.sdkroot.mk
> @@ -90,8 +90,8 @@ export ROOTDIRS-y ROOTDIRS- ROOTDIRS-n
>  .PHONY: default
>  default: all
>
> -.PHONY: config showconfigs showversion showversionum
> -config showconfigs showversion showversionum:
> +.PHONY: defconfig config showconfigs showversion showversionum
> +defconfig config showconfigs showversion showversionum:
>  	$(Q)$(MAKE) -f $(RTE_SDK)/mk/rte.sdkconfig.mk $@
>
>  .PHONY: cscope gtags tags etags
>

Other than that, I tried this patch for x86 and it worked fine.

-
Shreyansh