initial buildroot for linux 5.15

package/tzdata/Config.in

@@ -0,0 +1,9 @@
+# This package is not meant to be user-visible.
+# It gets selected by BR2_TARGET_TZ in system/Config.in
+
+config BR2_PACKAGE_TZDATA
+	bool
+	help
+	  Time zone database
+
+	  http://www.iana.org/time-zones/repository/tz-link.html

package/tzdata/tzdata.hash

@@ -0,0 +1,4 @@
+# From https://mm.icann.org/pipermail/tz-announce/2021-January/000065.html
+sha512  7cdd762ec90ce12a30fa36b1d66d1ea82d9fa21e514e2b9c7fcbe2541514ee0fadf30843ff352c65512fb270857b51d1517b45e1232b89c6f954ba9ff1833bb3  tzdata2021a.tar.gz
+# Locally computed:
+sha256  0613408568889f5739e5ae252b722a2659c02002839ad970a63dc5e9174b27cf  LICENSE

package/tzdata/tzdata.mk

@@ -0,0 +1,66 @@
+################################################################################
+#
+# tzdata
+#
+################################################################################
+
+TZDATA_VERSION = 2021a
+TZDATA_SOURCE = tzdata$(TZDATA_VERSION).tar.gz
+TZDATA_SITE = https://www.iana.org/time-zones/repository/releases
+TZDATA_STRIP_COMPONENTS = 0
+TZDATA_DEPENDENCIES = host-tzdata
+HOST_TZDATA_DEPENDENCIES = host-zic
+TZDATA_LICENSE = Public domain
+TZDATA_LICENSE_FILES = LICENSE
+
+# Take care when re-ordering this list since this might break zone
+# dependencies
+TZDATA_DEFAULT_ZONELIST = \
+	africa antarctica asia australasia europe northamerica \
+	southamerica etcetera backward factory
+
+ifeq ($(call qstrip,$(BR2_TARGET_TZ_ZONELIST)),default)
+TZDATA_ZONELIST = $(TZDATA_DEFAULT_ZONELIST)
+else
+TZDATA_ZONELIST = $(call qstrip,$(BR2_TARGET_TZ_ZONELIST))
+endif
+
+TZDATA_LOCALTIME = $(call qstrip,$(BR2_TARGET_LOCALTIME))
+ifneq ($(TZDATA_LOCALTIME),)
+define TZDATA_SET_LOCALTIME
+	if [ ! -f $(TARGET_DIR)/usr/share/zoneinfo/$(TZDATA_LOCALTIME) ]; then \
+		printf "Error: '%s' is not a valid timezone, check your BR2_TARGET_LOCALTIME setting\n" \
+			"$(TZDATA_LOCALTIME)"; \
+		exit 1; \
+	fi
+	ln -sf ../usr/share/zoneinfo/$(TZDATA_LOCALTIME) $(TARGET_DIR)/etc/localtime
+	echo "$(TZDATA_LOCALTIME)" >$(TARGET_DIR)/etc/timezone
+endef
+endif
+
+define TZDATA_INSTALL_TARGET_CMDS
+	$(INSTALL) -d -m 0755 $(TARGET_DIR)/usr/share/zoneinfo
+	cp -a $(HOST_DIR)/share/zoneinfo/* $(TARGET_DIR)/usr/share/zoneinfo
+	cd $(TARGET_DIR)/usr/share/zoneinfo; \
+	for zone in posix/*; do \
+	    ln -sfn "$${zone}" "$${zone##*/}"; \
+	done
+	$(TZDATA_SET_LOCALTIME)
+endef
+
+define HOST_TZDATA_BUILD_CMDS
+	(cd $(@D); \
+		for zone in $(TZDATA_ZONELIST); do \
+			$(ZIC) -b fat -d _output/posix $$zone || exit 1; \
+			$(ZIC) -b fat -d _output/right -L leapseconds $$zone || exit 1; \
+		done; \
+	)
+endef
+
+define HOST_TZDATA_INSTALL_CMDS
+	$(INSTALL) -d -m 0755 $(HOST_DIR)/share/zoneinfo
+	cp -a $(@D)/_output/* $(@D)/*.tab $(HOST_DIR)/share/zoneinfo
+endef
+
+$(eval $(generic-package))
+$(eval $(host-generic-package))