initial buildroot for linux 5.15

support/misc/gen-glibc-locales.mk

@@ -0,0 +1,41 @@
+# Generates glibc locale data for target.
+
+inputfile = $(firstword $(subst ., ,$(1)))
+charmap = $(or $(word 2,$(subst ., ,$(1))),UTF-8)
+
+# Packages all the generated locale data into the final archive.
+#
+# We sort the file names to produce consistent output regardless of
+# the `find` outputs order.
+$(TARGET_DIR)/usr/lib/locale/locale-archive: $(LOCALES)
+	$(Q)rm -f $(@)
+	$(Q)find $(TARGET_DIR)/usr/lib/locale/ -maxdepth 1 -mindepth 1 -type d -print0 \
+	| sort -z \
+	| xargs -0 \
+		$(HOST_DIR)/bin/localedef \
+			--prefix=$(TARGET_DIR) \
+			--$(ENDIAN)-endian \
+			--add-to-archive
+
+# Generates locale data for each locale.
+#
+# The input data comes preferably from the toolchain, or if the toolchain
+# does not have them (Linaro toolchains), we use the ones available on the
+# host machine.
+#
+# Uses `localedef`, which is built by the `host-localedef` package.
+$(LOCALES): | $(TARGET_DIR)/usr/lib/locale/
+	$(Q)echo "Generating locale $(@)"
+	$(Q)I18NPATH=$(STAGING_DIR)/usr/share/i18n:/usr/share/i18n \
+	$(HOST_DIR)/bin/localedef \
+		--prefix=$(TARGET_DIR) \
+		--$(ENDIAN)-endian \
+		--no-archive \
+		-i $(call inputfile,$(@)) \
+		-f $(call charmap,$(@)) \
+		$(@)
+
+.PHONY: $(LOCALES)
+
+$(TARGET_DIR)/usr/lib/locale/:
+	$(Q)mkdir -p $(TARGET_DIR)/usr/lib/locale/