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greybus: makefile: use POSIX functions for kernel cmp 

[[, == and echo -e are bash/zsh-ism and not POSIX, so when using a POSIX
shell the kernel_cmp can issue some warnings and not work properly.

Use only POSIX operators for kernel version compare.

Signed-off-by: Rui Miguel Silva <rui.silva@linaro.org>
Tested-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
This commit is contained in:
Rui Miguel Silva 2015-08-16 00:48:03 +01:00 committed by Greg Kroah-Hartman
parent 2870b52bae
commit 1ab2e8918d
1 changed files with 1 additions and 1 deletions
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2
drivers/staging/greybus/Makefile
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@ -61,7 +61,7 @@ ifneq ($(KERNELRELEASE),)
# This function returns the argument version if current kernel version is minor
# than the passed version, return 1 if equal or the current kernel version if it
# is greater than argument version.
kvers_cmp=$(shell [[ "$(KERNELVERSION)" == "$(1)" ]] && echo 1 || echo -e "$(1)\n$(KERNELVERSION)" | sort -V | tail -1)
kvers_cmp=$(shell [ "$(KERNELVERSION)" = "$(1)" ] && echo 1 || printf "$(1)\n$(KERNELVERSION)" | sort -V | tail -1)
ifneq ($(call kvers_cmp,"3.19.0"),3.19.0)
CONFIG_OPTIONS_ENABLE += LEDS_CLASS_FLASH