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configure: Fix in6_pktinfo auto detection

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This commit fixes auto detection of in6_pktinfo.
When negotiating an IPv6 IKE session charon reported an error

"Jun 30 16:42:49 03[NET] error reading IP header"

The cause of error was missing in6_pktinfo declaration, which is
auto detected. This auto detection may fail with an error depending
on compiler flags:

configure:19850: checking for in6_pktinfo
configure:19870: gcc -c -g -O0 -Wall -Wno-format -Wno-format-security
-Wno-pointer-sign -Werror -Wfatal-errors -Wno-error=stringop-truncation
conftest.c >&5
conftest.c: In function 'main':
conftest.c:73:11: error: 'pi.ipi6_ifindex' is used uninitialized in this
function [-Werror=uninitialized]
   73 |     if (pi.ipi6_ifindex)
      |         ~~^~~~~~~~~~~~~
compilation terminated due to -Wfatal-errors.
cc1: all warnings being treated as errors

Signed-off-by: Antony Antony <antony.antony@secunet.com>
This commit is contained in:
Antony Antony 2023-09-04 11:18:23 +02:00 committed by Tobias Brunner
parent 0bff5c98bc
commit cdc34ddea2
1 changed files with 1 additions and 1 deletions
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2
configure.ac
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@ -744,7 +744,7 @@ AC_COMPILE_IFELSE(
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>]],
[[struct in6_pktinfo pi;
[[struct in6_pktinfo pi = {};
if (pi.ipi6_ifindex)
{
return 0;