- add my working draft for busybox-initramfs (not yet finished, so still commented out in Config.in)

package/busybox/initramfs.mk

@@ -0,0 +1,96 @@
+#############################################################
+#
+# busybox image for initramfs
+#
+#############################################################
+
+BUSYBOX_INITRAMFS_DIR:=$(BUSYBOX_DIR)-initramfs
+
+$(BUSYBOX_INITRAMFS_DIR)/.unpacked: $(DL_DIR)/$(BUSYBOX_SOURCE)
+	rm -rf $(BUILD_DIR)/tmp $(BUSYBOX_INITRAMFS_DIR)
+	-mkdir $(BUILD_DIR)/tmp
+	$(BUSYBOX_UNZIP) $(DL_DIR)/$(BUSYBOX_SOURCE) | tar -C $(BUILD_DIR)/tmp $(TAR_OPTIONS) -
+ifeq ($(strip $(BR2_PACKAGE_BUSYBOX_SNAPSHOT)),y)
+	mv $(BUILD_DIR)/tmp/busybox $(BUSYBOX_INITRAMFS_DIR)
+else
+	mv $(BUILD_DIR)/tmp/busybox-$(BUSYBOX_VERSION) $(BUSYBOX_INITRAMFS_DIR)
+endif
+	touch $@
+
+$(BUSYBOX_INITRAMFS_DIR)/.configured: $(BUSYBOX_INITRAMFS_DIR)/.unpacked
+	(echo CONFIG_CAT=y; \
+	 echo CONFIG_CHROOT=y; \
+	 echo CONFIG_DD=y; \
+	 echo CONFIG_FEATURE_DD_IBS_OBS=y; \
+	 echo CONFIG_FALSE=y; \
+	 echo CONFIG_GUNZIP=y; \
+	 echo CONFIG_HALT=y; \
+	 echo CONFIG_INSMOD=y; \
+	 echo CONFIG_KILL=y; \
+	 echo CONFIG_LN=y; \
+	 echo CONFIG_PS=y; \
+	 echo CONFIG_MDEV=y; \
+	 echo CONFIG_MKDIR=y; \
+	 echo CONFIG_MKFIFO=y; \
+	 echo CONFIG_MKNOD=y; \
+	 echo CONFIG_MODPROBE=y; \
+	 echo CONFIG_FEATURE_MODPROBE_MULTIPLE_OPTIONS=y; \
+	 echo CONFIG_FEATURE_MODPROBE_FANCY_ALIAS=y; \
+	 echo CONFIG_FEATURE_CHECK_TAINTED_MODULE=n; \
+	 echo CONFIG_FEATURE_2_4_MODULES=n; \
+	 echo CONFIG_MOUNT=y; \
+	 echo CONFIG_SWITCH_ROOT=y; \
+	 echo CONFIG_READLINK=y; \
+	 echo CONFIG_RMMOD=y; \
+	 echo CONFIG_MSH=y; \
+	 echo CONFIG_FEATURE_SH_IS_MSH=y; \
+	 echo CONFIG_SLEEP=y; \
+	 echo CONFIG_STATIC=y; \
+	 echo CONFIG_TRUE=y; \
+	 echo CONFIG_UMOUNT=y; \
+	 echo CONFIG_FEATURE_UMOUNT_ALL=y; \
+	 echo CONFIG_UNAME=y; \
+	) > $(BUSYBOX_INITRAMFS_DIR)/.config 
+	yes "" | $(MAKE) CC=$(TARGET_CC) CROSS_COMPILE="$(TARGET_CROSS)" \
+		CROSS="$(TARGET_CROSS)" -C $(BUSYBOX_INITRAMFS_DIR) oldconfig
+	touch $@
+
+
+$(BUSYBOX_INITRAMFS_DIR)/inst/busybox: $(BUSYBOX_INITRAMFS_DIR)/.configured
+	-mkdir $(@D)
+	$(MAKE) CC=$(TARGET_CC) CROSS_COMPILE="$(TARGET_CROSS)" \
+		CROSS="$(TARGET_CROSS)" PREFIX="$(TARGET_DIR)" \
+		ARCH=$(KERNEL_ARCH) \
+		EXTRA_CFLAGS="$(TARGET_CFLAGS)" -C $(BUSYBOX_INITRAMFS_DIR) \
+		busybox.links busybox
+ifeq ($(BR2_PREFER_IMA)$(BR2_PACKAGE_BUSYBOX_SNAPSHOT),yy)
+	rm -f $@
+	$(MAKE) CC=$(TARGET_CC) CROSS_COMPILE="$(TARGET_CROSS)" \
+		CROSS="$(TARGET_CROSS)" PREFIX="$(TARGET_DIR)" \
+		ARCH=$(KERNEL_ARCH) STRIP="$(STRIP)" \
+		EXTRA_CFLAGS="$(TARGET_CFLAGS)" -C $(BUSYBOX_INITRAMFS_DIR) \
+		-f scripts/Makefile.IMA
+endif
+	cp -f $(BUSYBOX_INITRAMFS_DIR)/busybox $@
+	$(STRIP) $(STRIP_STRIP_ALL) $@
+
+busybox-initramfs: uclibc $(BUSYBOX_INITRAMFS_DIR)/inst/busybox
+
+busybox-initramfs-menuconfig: host-sed $(BUILD_DIR) busybox-source $(BUSYBOX_INITRAMFS_DIR)/.configured
+	$(MAKE) __TARGET_ARCH=$(ARCH) -C $(BUSYBOX_INITRAMFS_DIR) menuconfig
+
+busybox-initramfs-clean:
+	rm -f $(BUSYBOX_INITRAMFS_DIR)/busybox \
+		$(BUSYBOX_INITRAMFS_DIR)/inst/busybox
+	-$(MAKE) -C $(BUSYBOX_INITRAMFS_DIR) clean
+
+busybox-initramfs-dirclean:
+	rm -rf $(BUSYBOX_INITRAMFS_DIR)
+#############################################################
+#
+# Toplevel Makefile options
+#
+#############################################################
+ifeq ($(strip $(BR2_PACKAGE_BUSYBOX_INITRAMFS)),y)
+TARGETS+=busybox-initramfs
+endif