[PATCH] generic empty __check_native implementation

[Pino Toscano]

Hi,

sysdeps/posix/getaddrinfo.c calls a __check_native function to 
eventually check whether an interface uses a native transport; however, 
the only existing implementation of it is in 
sysdeps/unix/sysv/linux/check_native.c, meaning any GNU non-Linux OS 
will get an undefined reference when linking libc due to its lack.

Attached there is an empty implementation of __check_native, in the same 
place as another internal inet function (__check_pf) has its generic 
version. At least at a quick look it seems the empty implementation 
should pose no issues (the Linux one can even not change a1_native and 
a2_native).

Does it look good?
-- 
Pino Toscano

generic-check_native.diff
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