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build: use perl instead of GNU date for KBUILD_BUILD_TIMESTAMP 

Fixes warning on non-Linux systems

Signed-off-by: Felix Fietkau <nbd@nbd.name>
Felix Fietkau 2016-08-23 11:05:56 +02:00
parent 88b16da8c4
commit f5860f898a
1 changed files with 7 additions and 1 deletions
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8
include/kernel-defaults.mk
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@ -5,6 +5,12 @@
# See /LICENSE for more information.
#
ifneq ($(SOURCE_DATE_EPOCH),)
ifndef DUMP
KBUILD_BUILD_TIMESTAMP:=$(shell perl -e 'print scalar gmtime($(SOURCE_DATE_EPOCH))')
endif
endif
KERNEL_MAKEOPTS := -C $(LINUX_DIR) \
HOSTCFLAGS="$(HOST_CFLAGS) -Wall -Wmissing-prototypes -Wstrict-prototypes" \
CROSS_COMPILE="$(KERNEL_CROSS)" \
@ -12,7 +18,7 @@ KERNEL_MAKEOPTS := -C $(LINUX_DIR) \
KBUILD_HAVE_NLS=no \
KBUILD_BUILD_USER="$(call qstrip,$(CONFIG_KERNEL_BUILD_USER))" \
KBUILD_BUILD_HOST="$(call qstrip,$(CONFIG_KERNEL_BUILD_DOMAIN))" \
$(if $(SOURCE_DATE_EPOCH),KBUILD_BUILD_TIMESTAMP="$(shell date -u --date="@$(SOURCE_DATE_EPOCH)")") \
KBUILD_BUILD_TIMESTAMP="$(KBUILD_BUILD_TIMESTAMP)" \
KBUILD_BUILD_VERSION="0" \
CONFIG_SHELL="$(BASH)" \
$(if $(findstring c,$(OPENWRT_VERBOSE)),V=1,V='') \