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Re: lwip socket errors
- From: John Dallaway <john at dallaway dot org dot uk>
- To: William Wagner <will_wagner at carallon dot com>
- Cc: ecos-discuss at ecos dot sourceware dot org
- Date: Fri, 18 Feb 2011 20:41:05 +0000
- Subject: [ECOS] Re: lwip socket errors
- References: <4D5EABC2.8090700@carallon.com>
Hi Will
William Wagner wrote:
> Been looking at getting lwip to set errno when errors occur and am
> struggling a bit. The problem is in
> packages\net\lwip_tcpip\current\src\api\sockets.c:152
>
> To get it so that errno is set with the macro set_errno you must have
> ERRNO defined. I have changed the cdl so that this is set. However you
> then get a compilation error as errno is undefined. Attached is my
> proposed patch to fix the issue. I realise this is a change to lwip code
> which is best avoided but I can't see any other way of making it work.
> Opinions?
According to the lwIP documentation file doc/sys_arch.txt, the file
include/arch/cc.h "must either include a system-local <errno.h> which
defines the standard *nix error codes, or it should #define
LWIP_PROVIDE_ERRNO to make lwip/arch.h define the codes which are used
throughout".
Try including errno.h from the file include/arch/cc.h and let us know if
it helps...
John Dallaway
eCos maintainer
http://www.dallaway.org.uk/john
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