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test x"$have_sel_get_name" != x"yes" -a x"$have_sel_getName" != x"yes" && \
AC_ERROR(You need either sel_get_name or sel_getName in libobjc!)
AC_CHECK_FUNC(asprintf, AC_DEFINE(HAVE_ASPRINTF, 1, "Whether we have asprintf"))
AC_MSG_CHECKING(whether we have IPv6 support)
AC_TRY_RUN([
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
int
main()
{
int fd;
struct sockaddr_in6 addr;
fd = socket(AF_INET6, SOCK_STREAM, 0);
/* Do something with it to prevent an error due to -Werror */
memset(&addr, 0, sizeof(addr));
exit(fd >= 0 ? 0 : 1);
}],
have_ipv6="yes", have_ipv6="no", have_ipv6="no")
AC_MSG_RESULT($have_ipv6)
test x"$have_ipv6" = x"yes" && \
AC_DEFINE(HAVE_IPV6, 1, "Whether we have IPv6 support")
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