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icmp6: Fix "LWIP_ICMP6_DATASIZE" redefined build warning if it was set to 0

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Need to undefine LWIP_ICMP6_DATASIZE before change the setting.
While at it, also remove the unneeded #ifndef LWIP_ICMP6_DATASIZE
checking because it is set in lwip/opt.h.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
This commit is contained in:
Axel Lin 2018-02-20 17:54:49 +08:00
parent a894140bb0
commit e9bd31b190
1 changed files with 1 additions and 3 deletions
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4
src/core/ipv6/icmp6.c
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@ -57,10 +57,8 @@
#include <string.h>
#ifndef LWIP_ICMP6_DATASIZE
#define LWIP_ICMP6_DATASIZE 8
#endif
#if LWIP_ICMP6_DATASIZE == 0
#undef LWIP_ICMP6_DATASIZE
#define LWIP_ICMP6_DATASIZE 8
#endif