Emily Trau abc150085f LibC: Add missing sys/cdefs.h include ...

Some header files use __BEGIN_DECLS without including sys/cdefs.h.
This causes issues for C code that compiles against these headers,
which may occur with Ports.

2022-08-23 19:07:12 +01:00

..

if_arp.h

…

if.h

…

route.h

…