python-lxml: add initial version (with python3 variant included)

This package requires libxml2 & libxslt to be built, has some
C code so it's not installable via pip.
It needs cross-compilation.

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

lang/python/python-lxml/Makefile

@@ -0,0 +1,94 @@
+#
+# Copyright (C) 2017 OpenWrt.org
+#
+# This is free software, licensed under the GNU General Public License v2.
+# See /LICENSE for more information.
+#
+
+include $(TOPDIR)/rules.mk
+
+PKG_NAME:=python-lxml
+PKG_VERSION:=3.7.2
+PKG_RELEASE:=1
+
+PKG_SOURCE:=lxml-$(PKG_VERSION).tgz
+PKG_SOURCE_URL:=http://lxml.de/files/
+PKG_HASH:=59d9176360dbc3919e9d4bfca85c1ca64ab4f4ee00e6f119d7150ba887e3410a
+
+PKG_BUILD_DIR:=$(BUILD_DIR)/$(BUILD_VARIANT)-lxml-$(PKG_VERSION)
+PKG_UNPACK=$(HOST_TAR) -C $(PKG_BUILD_DIR) --strip-components=1 -xzf $(DL_DIR)/$(PKG_SOURCE)
+
+PKG_LICENSE:=BSD
+PKG_LICENSE_FILES:=LICENSES.txt
+PKG_MAINTAINER:=Alexandru Ardelean <ardeleanalex@gmail.com>
+
+include $(INCLUDE_DIR)/package.mk
+$(call include_mk, python-package.mk)
+$(call include_mk, python3-package.mk)
+
+define Package/python-lxml/Default
+  SECTION:=lang
+  CATEGORY:=Languages
+  SUBMENU:=Python
+  URL:=http://lxml.de
+  DEPENDS:=+libxml2 +libxslt +libexslt
+endef
+
+define Package/python-lxml
+$(call Package/python-lxml/Default)
+  TITLE:=python-lxml
+  DEPENDS+=+python-light +python-codecs
+  VARIANT:=python
+endef
+
+define Package/python3-lxml
+$(call Package/python-lxml/Default)
+  TITLE:=python3-lxml
+  DEPENDS+=+python3-light
+  VARIANT:=python3
+endef
+
+define Package/python-lxml/description
+The lxml XML toolkit is a Pythonic binding
+for the C libraries libxml2 and libxslt.
+endef
+
+define Package/python3-lxml/description
+$(call Package/python-lxml/description)
+.
+(Variant for Python3)
+endef
+
+TARGET_LDFLAGS += -lxml2 -lxslt -lexslt
+
+define PyBuild/Compile/Default
+	$(call Build/Compile/PyMod,, \
+		install --prefix="/usr" --root="$(PKG_INSTALL_DIR)" \
+		--static \
+		--single-version-externally-managed \
+		, \
+		INCLUDE="$(STAGING_DIR)/usr/include/ $(STAGING_DIR)/usr/include/libxml2" \
+		LIBRARY="$(STAGING_DIR)/usr/lib $(STAGING_DIR)/lib" \
+		CFLAGS="$(TARGET_CFLAGS)" \
+		LDFLAGS="$(TARGET_LDFLAGS)" \
+	)
+endef
+
+define Py3Build/Compile/Default
+	$(call Build/Compile/Py3Mod,, \
+		install --prefix="/usr" --root="$(PKG_INSTALL_DIR)" \
+		--static \
+		--single-version-externally-managed \
+		, \
+		INCLUDE="$(STAGING_DIR)/usr/include/ $(STAGING_DIR)/usr/include/libxml2" \
+		LIBRARY="$(STAGING_DIR)/usr/lib $(STAGING_DIR)/lib" \
+		CFLAGS="$(TARGET_CFLAGS)" \
+		LDFLAGS="$(TARGET_LDFLAGS)" \
+	)
+endef
+
+$(eval $(call PyPackage,python-lxml))
+$(eval $(call BuildPackage,python-lxml))
+
+$(eval $(call Py3Package,python3-lxml))
+$(eval $(call BuildPackage,python3-lxml))