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ifdef CONFIG_USE_MKLIBS
  define mklibs
        rm -rf $(TMP_DIR)/mklibs-progs $(TMP_DIR)/mklibs-out
        # first find all programs and add them to the mklibs list
        find $(STAGING_DIR_ROOT) -type f -perm /100 -exec \
                file -r -N -F '' {} + | \
                awk ' /executable.*dynamically/ { print $$1 }' > $(TMP_DIR)/mklibs-progs
        # find all loadable objects that are not regular libraries and add them to the list as well
        find $(STAGING_DIR_ROOT) -type f -name \*.so\* -exec \
                file -r -N -F '' {} + | \
                awk ' /shared object/ { print $$1 }' > $(TMP_DIR)/mklibs-libs
        mkdir -p $(TMP_DIR)/mklibs-out
        $(STAGING_DIR_HOST)/bin/mklibs -D \
                -d $(TMP_DIR)/mklibs-out \
                --sysroot $(STAGING_DIR_ROOT) \
                `cat $(TMP_DIR)/mklibs-libs | sed 's:/*[^/]\+/*$$::' | uniq | sed 's:^$(STAGING_DIR_ROOT):-L :'` \
                --ldlib $(patsubst $(STAGING_DIR_ROOT)/%,/%,$(firstword $(wildcard \
                        $(foreach name,ld-uClibc.so.* ld-linux.so.* ld-*.so ld-musl-*.so.*, \
                          $(STAGING_DIR_ROOT)/lib/$(name) \
                        )))) \
                --target $(REAL_GNU_TARGET_NAME) \
                `cat $(TMP_DIR)/mklibs-progs $(TMP_DIR)/mklibs-libs` 2>&1
        $(RSTRIP) $(TMP_DIR)/mklibs-out
        for lib in `ls $(TMP_DIR)/mklibs-out/*.so.* 2>/dev/null`; do \
                LIB="$${lib##*/}"; \
                DEST="`ls "$(1)/lib/$$LIB" "$(1)/usr/lib/$$LIB" 2>/dev/null`"; \
                [ -n "$$DEST" ] || continue; \
                echo "Copying stripped library $$lib to $$DEST"; \
                cp "$$lib" "$$DEST" || exit 1; \
        done
  endef
endif

# where to build (and put) .ipk packages
opkg = \
  IPKG_NO_SCRIPT=1 \
  IPKG_INSTROOT=$(1) \
  TMPDIR=$(1)/tmp \
  $(STAGING_DIR_HOST)/bin/opkg \
        --offline-root $(1) \
        --force-postinstall \
        --add-dest root:/ \
        --add-arch all:100 \
        --add-arch $(if $(ARCH_PACKAGES),$(ARCH_PACKAGES),$(BOARD)):200

TARGET_DIR_ORIG := $(TARGET_ROOTFS_DIR)/root.orig-$(BOARD)

ifdef CONFIG_CLEAN_IPKG
  define clean_ipkg
        -find $(1)/usr/lib/opkg/info -type f -and -not -name '*.control' | $(XARGS) rm -rf
        -sed -i -ne '/^Require-User: /p' $(1)/usr/lib/opkg/info/*.control
        awk ' \
                BEGIN { conffiles = 0; print "Conffiles:" } \
                /^Conffiles:/ { conffiles = 1; next } \
                !/^ / { conffiles = 0; next } \
                conffiles == 1 { print } \
        ' $(1)/usr/lib/opkg/status >$(1)/usr/lib/opkg/status.new
        mv $(1)/usr/lib/opkg/status.new $(1)/usr/lib/opkg/status
        -find $(1)/usr/lib/opkg -empty | $(XARGS) rm -rf
  endef
endif

define prepare_rootfs
        $(if $(2),@if [ -d '$(2)' ]; then \
                $(call file_copy,$(2)/.,$(1)); \
        fi)
        @mkdir -p $(1)/etc/rc.d
        @mkdir -p $(1)/var/lock
        @( \
                cd $(1); \
                for script in ./usr/lib/opkg/info/*.postinst; do \
                        IPKG_INSTROOT=$(1) $$(which bash) $$script; \
                        ret=$$?; \
                        if [ $$ret -ne 0 ]; then \
                                echo "postinst script $$script has failed with exit code $$ret" >&2; \
                                exit 1; \
                        fi; \
                done; \
                for script in ./etc/init.d/*; do \
                        grep '#!/bin/sh /etc/rc.common' $$script >/dev/null || continue; \
                        IPKG_INSTROOT=$(1) $$(which bash) ./etc/rc.common $$script enable; \
                done || true \
        )
        $(if $(SOURCE_DATE_EPOCH),sed -i "s/Installed-Time: .*/Installed-Time: $(SOURCE_DATE_EPOCH)/" $(1)/usr/lib/opkg/status)
        @-find $(1) -name CVS   | $(XARGS) rm -rf
        @-find $(1) -name .svn  | $(XARGS) rm -rf
        @-find $(1) -name .git  | $(XARGS) rm -rf
        @-find $(1) -name '.#*' | $(XARGS) rm -f
        rm -rf $(1)/tmp/*
        rm -f $(1)/usr/lib/opkg/lists/*
        rm -f $(1)/usr/lib/opkg/info/*.postinst*
        rm -f $(1)/var/lock/*.lock
        $(call clean_ipkg,$(1))
        $(call mklibs,$(1))
endef