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-rw-r--r--ares/configure.ac2
1 files changed, 2 insertions, 0 deletions
diff --git a/ares/configure.ac b/ares/configure.ac
index aa1fede91..3af08b44b 100644
--- a/ares/configure.ac
+++ b/ares/configure.ac
@@ -1,6 +1,8 @@
dnl Process this file with autoconf to produce a configure script.
+AC_PREREQ(2.57)
AC_INIT(ares_init.c)
+AC_CONFIG_SRCDIR([ares_ipv6.h])
AM_CONFIG_HEADER(config.h)
AM_MAINTAINER_MODE
AM_INIT_AUTOMAKE(c-ares, CVS)