python: new module cffi

Foreign Function Interface for Python calling C code.

[Thomas: add dependency on host-pkgconf and libffi, enable on Python 3
since the module builds fine and loads fine with Python 3 as well.]

Signed-off-by: oli vogt <oli.vogt.pub01@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/Config.in

@@ -469,6 +469,7 @@ endif
 if BR2_PACKAGE_PYTHON || BR2_PACKAGE_PYTHON3
 menu "external python modules"
 	source "package/python-bottle/Config.in"
+	source "package/python-cffi/Config.in"
 	source "package/python-configobj/Config.in"
 	source "package/python-crc16/Config.in"
 	source "package/python-daemon/Config.in"

package/python-cffi/Config.in

@@ -0,0 +1,10 @@
+config BR2_PACKAGE_PYTHON_CFFI
+	bool "python-cffi"
+	depends on BR2_PACKAGE_PYTHON || BR2_PACKAGE_PYTHON3
+	select BR2_PACKAGE_LIBFFI
+	help
+	  This is the Foreign Function Interface for Python calling C
+	  code.  The aim of this project is to provide a convenient
+	  and reliable way of calling C code from Python.
+
+	  https://pypi.python.org/pypi/cffi

package/python-cffi/python-cffi.mk

@@ -0,0 +1,15 @@
+################################################################################
+#
+# python-cffi
+#
+################################################################################
+
+PYTHON_CFFI_VERSION = 0.8.2
+PYTHON_CFFI_SOURCE = cffi-$(PYTHON_CFFI_VERSION).tar.gz
+PYTHON_CFFI_SITE = https://pypi.python.org/packages/source/c/cffi/
+PYTHON_CFFI_SETUP_TYPE = setuptools
+PYTHON_CFFI_DEPENDENCIES = host-pkgconf libffi
+PYTHON_CFFI_LICENSE = MIT
+PYTHON_CFFI_LICENSE_FILES = LICENSE
+
+$(eval $(python-package))