build: ip6.h is not required

Remove the check from configure.ac that errors out when ip6.h is not
found. The code does not actually depend on any structures from it.

Reported-by: anonymous
Signed-off-by: Jan Engelhardt <jengelh@medozas.de>
Signed-off-by: Patrick McHardy <kaber@trash.net>

diff --git a/configure.ac b/configure.ac
index 2d2f90fd5cf8e800db355350222c519bf4431d37..09e5d0d44664ac0e3c3e00ae11317c7b6ee886e5 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -38,7 +38,6 @@ AC_ARG_ENABLE([devel],
 AC_ARG_ENABLE([libipq],
        AS_HELP_STRING([--enable-libipq], [Build and install libipq]))
 
-AC_CHECK_HEADER([netinet/ip6.h], [], [AC_MSG_ERROR(but we need that for IPv6)])
 AC_CHECK_HEADER([linux/dccp.h])
 
 blacklist_modules="";