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nd6: Fix build error if LWIP_ND6_RDNSS_MAX_DNS_SERVERS == 0

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Fix below build error when LWIP_ND6_RDNSS_MAX_DNS_SERVERS == 0
../../../../lwip/src/core/ipv6/nd6.c: In function ‘nd6_input’:
../../../../lwip/src/core/ipv6/nd6.c:400:10: error: unused variable ‘rdnss_server_idx’ [-Werror=unused-variable]
     u8_t rdnss_server_idx = 0;
          ^~~~~~~~~~~~~~~~
cc1: all warnings being treated as errors
../Common.mk:93: recipe for target 'nd6.o' failed
make: *** [nd6.o] Error 1

Fixes: 6b1950ec24bc ("nd6: add support for RDNSS option (as per RFC 6106)")
Signed-off-by: Axel Lin <axel.lin@ingics.com>
This commit is contained in:
Axel Lin 2016-12-15 14:11:20 +08:00 committed by goldsimon
parent 6b1950ec24
commit e3925cc359
1 changed files with 1 additions and 1 deletions
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src/core/ipv6/nd6.c
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@ -395,7 +395,7 @@ nd6_input(struct pbuf *p, struct netif *inp)
struct ra_header *ra_hdr;
u8_t *buffer; /* Used to copy options. */
u16_t offset;
#ifdef LWIP_ND6_RDNSS_MAX_DNS_SERVERS
#if LWIP_ND6_RDNSS_MAX_DNS_SERVERS
/* There can by multiple RDNSS options per RA */
u8_t rdnss_server_idx = 0;
#endif /* LWIP_ND6_RDNSS_MAX_DNS_SERVERS */