python-setuptools: add ability to install on host

This depends on python-host.mk in PR #1984

Signed-off-by: Jeffery To <jeffery.to@gmail.com>

lang/python-setuptools/Makefile

@@ -15,10 +15,15 @@ PKG_SOURCE:=setuptools-$(PKG_VERSION).tar.gz
 PKG_SOURCE_URL:=https://pypi.python.org/packages/source/s/setuptools/
 PKG_MD5SUM:=533c868f01169a3085177dffe5e768bb
 
+HOST_BUILD_DEPENDS:=python/host
+
 PKG_BUILD_DIR:=$(BUILD_DIR)/setuptools-$(PKG_VERSION)
+HOST_BUILD_DIR:=$(BUILD_DIR_HOST)/setuptools-$(PKG_VERSION)
 
+include $(INCLUDE_DIR)/host-build.mk
 include $(INCLUDE_DIR)/package.mk
 $(call include_mk, python-package.mk)
+$(call include_mk, python-host.mk)
 
 define Package/python-setuptools
   SUBMENU:=Python
@@ -53,6 +58,18 @@ define PyPackage/python-setuptools/install
 	$(CP) $(PKG_INSTALL_DIR)/usr/bin/* $(1)/usr/bin/
 endef
 
+define Host/Compile
+	$(call Build/Compile/HostPyMod,,\
+		install --root="$(STAGING_DIR_HOST)" --prefix="" \
+		--single-version-externally-managed \
+	)
+endef
+
+define Host/Install
+endef
+
+$(eval $(call HostBuild))
+
 $(eval $(call PyPackage,python-setuptools))
 $(eval $(call BuildPackage,python-setuptools))