[lwip-devel] [bug #35928] BSD sockets functions must set errno for POSIX-compliance

[Simon Goldschmidt]

Follow-up Comment #3, bug #35928 (project lwip):

I can understand you're upset about wasting several hours. Still, I don't
think defining LWIP_SOCKET is the correct guard here: we don't define other
functions to their standard name by default (e.g. 'bind()', 'listen()' etc.)
but prefix them with 'lwip_' and only use standard names when
LWIP_COMPAT_SOCKETS==1.

Using this, we should be good and backwards compatible:

#ifndef set_errno
#if LWIP_COMPAT_SOCKETS || defined(ERRNO)
#define set_errno(err) errno = (err)
#else /* LWIP_COMPAT_SOCKETS || defined(ERRNO) */
#define set_errno(err)
#endif /* LWIP_COMPAT_SOCKETS || defined(ERRNO) */
#endif /* set_errno */

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