signal: Switch to ffilib.

signal/metadata.txt

@@ -1,5 +1,5 @@
 srctype = micropython-lib
 type = module
-version = 0.3
+version = 0.3.1
 author = Paul Sokolovsky
-depends = libc
+depends = ffilib

signal/setup.py

@@ -6,7 +6,7 @@ from setuptools import setup
 
 
 setup(name='micropython-signal',
-      version='0.3',
+      version='0.3.1',
       description='signal module for MicroPython',
       long_description="This is a module reimplemented specifically for MicroPython standard library,\nwith efficient and lean design in mind. Note that this module is likely work\nin progress and likely supports just a subset of CPython's corresponding\nmodule. Please help with the development if you are interested in this\nmodule.",
       url='https://github.com/micropython/micropython/issues/405',
@@ -16,4 +16,4 @@ setup(name='micropython-signal',
       maintainer_email='micro-python@googlegroups.com',
       license='MIT',
       py_modules=['signal'],
-      install_requires=['micropython-libc'])
+      install_requires=['micropython-ffilib'])

signal/signal.py

@@ -1,4 +1,4 @@
-import _libc
+import ffilib
 
 
 SIG_DFL = 0
@@ -8,7 +8,7 @@ SIGINT = 2
 SIGPIPE = 13
 SIGTERM = 15
 
-libc = _libc.get()
+libc = ffilib.libc()
 
 signal_i = libc.func("i", "signal", "ii")
 signal_p = libc.func("i", "signal", "ip")