[lwip-devel] [patch #9262] Support for 32bit errno codes

[Simon Goldschmidt]

Follow-up Comment #1, patch #9262 (project lwip):

It would have helped to include a description in the original submission.

Excerpt from lwip-users:
"I was trying to compile LwIP in the Hurd and many warnings like this
one raised when compiling sockets.c:

./api/sockets.c: In function 'lwip_getsockopt_impl':
./api/sockets.c:1892:12: warning: large integer implicitly truncated
to unsigned type [-Woverflow]
return EBADF;
^~~~~

EBADF macro is defined in the Hurd's errno.h:"

Essentially, Hurd's errnos are defined in an enum (which is of type 'int' by
the standard) and include "(0x10 << 26)", which is of course way out of our
u8_t.

However, there are two things wrong with the patch:
a) struct sock -> err must be changed, too
b) you'd want to use 'int' instead of 'u32_t' to stay portable

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