Re: [PATCH v2] mk: fix FreeBSD build

[Ferruh Yigit <ferruh.yigit@intel.com>]

On 7/18/2016 5:06 PM, Sergio Gonzalez Monroy wrote:
> The sed syntax of '0,/regexp/' is GNU specific and fails with
> non GNU sed in FreeBSD.
> 
> To solve the issue we can use awk instead to remove duplicates.
> 
> Fixes: b2063f104db7 ("mk: filter duplicate configuration entries")
> 
> Signed-off-by: Sergio Gonzalez Monroy <sergio.gonzalez.monroy@intel.com>
> ---
> 
> v2:
> - Use temp var instead of temp file
> 
>  mk/rte.sdkconfig.mk | 7 ++-----
>  1 file changed, 2 insertions(+), 5 deletions(-)
> 
> diff --git a/mk/rte.sdkconfig.mk b/mk/rte.sdkconfig.mk
> index e93237f..c2b6e13 100644
> --- a/mk/rte.sdkconfig.mk
> +++ b/mk/rte.sdkconfig.mk
> @@ -88,11 +88,8 @@ $(RTE_OUTPUT)/.config: $(RTE_CONFIG_TEMPLATE) FORCE | $(RTE_OUTPUT)
>  		$(CPP) -undef -P -x assembler-with-cpp \
>  		-ffreestanding \
>  		-o $(RTE_OUTPUT)/.config_tmp $(RTE_CONFIG_TEMPLATE) ; \
> -		for config in $$(grep -v "^#" $(RTE_OUTPUT)/.config_tmp | cut -d"=" -f1 | sort | uniq -d); do \
> -			while [ $$(grep "^$${config}=" $(RTE_OUTPUT)/.config_tmp -c ) -gt 1 ]; do \
> -				sed -i "0,/^$${config}=/{//d}" $(RTE_OUTPUT)/.config_tmp; \
> -			done; \
> -		done; \
> +		config=$$(grep -v "^#" $(RTE_OUTPUT)/.config_tmp) ; \
> +		echo "$$config" | awk -F'=' '{a[$$1]=$$0} END {for (i in a) print a[i]}' > $(RTE_OUTPUT)/.config_tmp ; \
This is another nice awk command.

A few comments about new command:
- Removes all comments from final config
- Spreads config option all over the file, logical grouping of options
removed.

When both happens at the same time, I have a concern that this may lead
missing some config options when somebody wants to update local config
file, but I am OK if everybody is OK.


>  		if ! cmp -s $(RTE_OUTPUT)/.config_tmp $(RTE_OUTPUT)/.config; then \
>  			cp $(RTE_OUTPUT)/.config_tmp $(RTE_OUTPUT)/.config ; \
>  			cp $(RTE_OUTPUT)/.config_tmp $(RTE_OUTPUT)/.config.orig ; \
>