[lwip-devel] Compilation Errors in the Updated Code (IPv6)

[Anil M]

Hi All,

I have taken lwip-1.4.0.rc1 code from VSS and applied
2011-01-18_IPv6_for_LwIP_1_4_0_RC1_patch.zip on top of the code.

When i am trying to compile the code in Microsoft Visual Studio 2008, with
LWIP_IPV6, i am facing the below errors.

1. src\core\snmp\mib2.c

1>mib2.c
1>..\..\..\src\core\snmp\mib2.c(1798) : warning C4133: 'function' :
incompatible types - from '*' to 'ip_addr_t *'
1>..\..\..\src\core\snmp\mib2.c(1851) : warning C4133: 'function' :
incompatible types - from '*' to 'ip_addr_t *'
1>..\..\..\src\core\snmp\mib2.c(1860) : error C2039: 'addr' : is not a
member of '<unnamed-tag>'
1>        F:\Working\Rakesh\LWIP_DIR\src\include\lwip/udp.h(114) : see
declaration of '<unnamed-tag>'
1>..\..\..\src\core\snmp\mib2.c(1860) : error C2039: 'addr' : is not a
member of '<unnamed-tag>'
1>        F:\Working\Rakesh\LWIP_DIR\src\include\lwip/udp.h(114) : see
declaration of '<unnamed-tag>'
1>..\..\..\src\core\snmp\mib2.c(3892) : error C2039: 'addr' : is not a
member of '<unnamed-tag>'
1>        F:\Working\Rakesh\LWIP_DIR\src\include\lwip/udp.h(114) : see
declaration of '<unnamed-tag>'


I am able to fix this problem, please check the below code changes:

line 1798:   snmp_iptooid(&pcb->local_ip.ip4, &udpidx[0]);

line 1851:   snmp_iptooid(&pcb->local_ip.ip4, &udpidx[0]);

line 1860: if (ip_addr_cmp(&npcb->local_ip.ip4, &pcb->local_ip.ip4) &&

line 3892:        !(ip_addr_cmp(&pcb->local_ip.ip4, &ip) &&

2. src\api\sockets.c 

1>sockets.c
1>..\..\..\src\api\sockets.c(464) : error C2121: '#' : invalid character :
possibly the result of a macro expansion
1>..\..\..\src\api\sockets.c(464) : error C2059: syntax error : 'if'
1>..\..\..\src\api\sockets.c(464) : error C2121: '#' : invalid character :
possibly the result of a macro expansion
1>..\..\..\src\api\sockets.c(464) : error C2121: '#' : invalid character :
possibly the result of a macro expansion
1>..\..\..\src\api\sockets.c(464) : error C2059: syntax error : '}'
1>..\..\..\src\api\sockets.c(547) : error C2121: '#' : invalid character :
possibly the result of a macro expansion
1>..\..\..\src\api\sockets.c(547) : error C2059: syntax error : 'if'
1>..\..\..\src\api\sockets.c(547) : error C2121: '#' : invalid character :
possibly the result of a macro expansion
1>..\..\..\src\api\sockets.c(547) : error C2121: '#' : invalid character :
possibly the result of a macro expansion
1>..\..\..\src\api\sockets.c(547) : error C2059: syntax error : '}'
1>..\..\..\src\api\sockets.c(961) : error C2121: '#' : invalid character :
possibly the result of a macro expansion
1>..\..\..\src\api\sockets.c(961) : error C2059: syntax error : 'if'
1>..\..\..\src\api\sockets.c(961) : error C2121: '#' : invalid character :
possibly the result of a macro expansion
1>..\..\..\src\api\sockets.c(961) : error C2121: '#' : invalid character :
possibly the result of a macro expansion
1>..\..\..\src\api\sockets.c(961) : error C2059: syntax error : '}'

I have found the problem, the problem is with LWIP_ERROR statement in the
above lines. LWIP_ERROR macro will take 3 arguments, but the statement in
the above lines has 4 arguments. 
Please let me know the fix for this problem.

Thanks for your support.

Regards,
Anil Kumar Maguluri
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