+tools-$(BUILD_TOOLCHAIN) += gmp mpfr mpc libelf expat
+tools-y += m4 libtool autoconf automake flex bison pkg-config mklibs
+tools-y += sstrip make-ext4fs e2fsprogs mtd-utils mkimage
+tools-y += firmware-utils patch-image quilt padjffs2
+tools-y += mm-macros missing-macros cmake scons bc findutils gengetopt patchelf
+tools-y += mtools dosfstools libressl
+tools-$(CONFIG_TARGET_orion_generic) += wrt350nv2-builder upslug2
+tools-$(CONFIG_powerpc) += upx
+tools-$(CONFIG_TARGET_x86) += qemu
+tools-$(CONFIG_TARGET_mxs) += elftosb sdimage
+tools-$(CONFIG_TARGET_ar71xx) += lzma-old squashfs
+tools-$(CONFIG_USES_MINOR) += kernel2minor
+tools-y += lzma squashfs4
+tools-$(BUILD_B43_TOOLS) += b43-tools
+tools-$(BUILD_ISL) += isl
+tools-$(CONFIG_USE_SPARSE) += sparse
+tools-$(CONFIG_TARGET_apm821xx) += genext2fs
+
+# builddir dependencies
+$(curdir)/bison/compile := $(curdir)/flex/install
+$(curdir)/flex/compile := $(curdir)/libtool/install
+$(curdir)/libtool/compile := $(curdir)/m4/install $(curdir)/autoconf/install $(curdir)/automake/install $(curdir)/missing-macros/install
+$(curdir)/squashfs/compile := $(curdir)/lzma-old/install
+$(curdir)/squashfs4/compile := $(curdir)/xz/install
+$(curdir)/quilt/compile := $(curdir)/autoconf/install $(curdir)/findutils/install
+$(curdir)/autoconf/compile := $(curdir)/m4/install
+$(curdir)/automake/compile := $(curdir)/m4/install $(curdir)/autoconf/install $(curdir)/pkg-config/install $(curdir)/xz/install
+$(curdir)/gmp/compile := $(curdir)/libtool/install
+$(curdir)/mpc/compile := $(curdir)/mpfr/install $(curdir)/gmp/install
+$(curdir)/mpfr/compile := $(curdir)/gmp/install
+$(curdir)/mtd-utils/compile := $(curdir)/e2fsprogs/install
+$(curdir)/mklibs/compile := $(curdir)/libtool/install
+$(curdir)/qemu/compile := $(curdir)/e2fsprogs/install
+$(curdir)/upslug2/compile := $(curdir)/libtool/install
+$(curdir)/mm-macros/compile := $(curdir)/libtool/install
+$(curdir)/missing-macros/compile := $(curdir)/autoconf/install
+$(curdir)/e2fsprogs/compile := $(curdir)/libtool/install
+$(curdir)/libelf/compile := $(curdir)/libtool/install
+$(curdir)/sdcc/compile := $(curdir)/bison/install
+$(curdir)/b43-tools/compile := $(curdir)/bison/install
+$(curdir)/padjffs2/compile := $(curdir)/findutils/install
+$(curdir)/isl/compile := $(curdir)/gmp/install
+$(curdir)/bc/compile := $(curdir)/bison/install
+$(curdir)/findutils/compile := $(curdir)/bison/install
+$(curdir)/gengetopt/compile := $(curdir)/libtool/install
+$(curdir)/patchelf/compile := $(curdir)/libtool/install
+$(curdir)/dosfstools/compile := $(curdir)/autoconf/install $(curdir)/automake/install
+$(curdir)/libressl/compile := $(curdir)/pkg-config/install
+$(curdir)/mkimage/compile += $(curdir)/libressl/install
+$(curdir)/firmware-utils/compile += $(curdir)/libressl/install
+$(curdir)/cmake/compile += $(curdir)/libressl/install
+
+ifneq ($(HOST_OS),Linux)
+ tools-y += coreutils
+endif
+
+ifneq ($(CONFIG_CCACHE)$(CONFIG_SDK),)
+$(foreach tool, $(filter-out xz patch,$(tools-y)), $(eval $(curdir)/$(tool)/compile += $(curdir)/ccache/install))
+tools-y += ccache
+endif
+
+# in case there is no patch tool on the host we need to make patch tool a
+# dependency for tools which have patches directory
+$(foreach tool, $(tools-y), $(if $(wildcard $(curdir)/$(tool)/patches),$(eval $(curdir)/$(tool)/compile += $(curdir)/patch/install)))
+
+$(foreach tool, $(filter-out xz,$(tools-y)), $(eval $(curdir)/$(tool)/compile += $(curdir)/xz/install))