pip,setuptools: move as part of python,python3 build

Signed-off-by: Alexandru Ardelean <ardeleanalex@gmail.com>

lang/python3/Makefile

@@ -14,7 +14,7 @@ PYTHON_VERSION:=$(PYTHON3_VERSION)
 PYTHON_VERSION_MICRO:=$(PYTHON3_VERSION_MICRO)
 
 PKG_NAME:=python3
-PKG_RELEASE:=3
+PKG_RELEASE:=4
 PKG_VERSION:=$(PYTHON_VERSION).$(PYTHON_VERSION_MICRO)
 
 PKG_SOURCE:=Python-$(PKG_VERSION).tar.xz
@@ -96,7 +96,9 @@ define Py3BasePackage
   endif
   PYTHON3_LIB_FILES_DEL+=$(2)
   define Py3Package/$(1)/filespec
-    $(subst $(space),$(newline),$(foreach lib_file,$(2),+|$(lib_file)))
+    ifneq ($(2),)
+      $(subst $(space),$(newline),$(foreach lib_file,$(2),+|$(lib_file)))
+    endif
   endef
 endef
 
@@ -140,8 +142,8 @@ CONFIGURE_ARGS+= \
 	--without-cxx-main \
 	--with-threads \
 	--with-system-ffi \
-	--without-pymalloc \
 	--with-ensurepip=no \
+	--without-pymalloc \
 	PYTHON_FOR_BUILD="$(PYTHON_FOR_BUILD)" \
 	$(ENABLE_IPV6) \
 	CONFIG_SITE="$(PKG_BUILD_DIR)/config.site" \
@@ -152,6 +154,31 @@ define Build/Prepare
 	$(CP) ./files/config.site $(PKG_BUILD_DIR)/config.site
 endef
 
+ifdef CONFIG_PACKAGE_python3-setuptools
+define Build/Compile/python3-setuptools
+	$(STAGING_DIR_HOSTPKG)/bin/pip3 install \
+		--ignore-installed \
+		--root=$(PKG_BUILD_DIR)/install-setuptools --prefix=. \
+		$(PKG_BUILD_DIR)/Lib/ensurepip/_bundled/setuptools-*.whl
+endef
+endif # CONFIG_PACKAGE_python3-setuptools
+
+ifdef CONFIG_PACKAGE_python3-pip
+define Build/Compile/python3-pip
+	$(STAGING_DIR_HOSTPKG)/bin/pip3 install \
+		--ignore-installed \
+		--root=$(PKG_BUILD_DIR)/install-pip --prefix=. \
+		$(PKG_BUILD_DIR)/Lib/ensurepip/_bundled/pip-*.whl
+endef
+endif # CONFIG_PACKAGE_python3-pip
+
+define Build/Compile
+	$(call Build/Compile/Default)
+	# Use host pip to install python-setuptools
+	$(call Build/Compile/python3-setuptools)
+	$(call Build/Compile/python3-pip)
+endef
+
 define Build/InstallDev
 	$(INSTALL_DIR) $(STAGING_DIR)/mk/
 	$(INSTALL_DIR) $(1)/usr/include/ $(1)/usr/lib/