[ORBit2] Raise autoconf req to 2.60 and add AC_HEADER_RESOLV to fix some build problems on older Mac

[Kjartan Maraas <kmaraas src gnome org>]

commit ca0a28c01e101a0b8f4ae0a1a4f007fd2a9373e0
Author: Kjartan Maraas <kmaraas gnome org>
Date:   Tue May 14 13:47:43 2013 +0200

    Raise autoconf req to 2.60 and add AC_HEADER_RESOLV to fix some build problems on older Mac

 configure.ac |    7 ++++---
 1 files changed, 4 insertions(+), 3 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 5185ce0..bd6fcac 100644
--- a/configure.ac
+++ b/configure.ac
@@ -7,8 +7,8 @@ dnl Process this file with autoconf to produce a configure script.
 AC_INIT([ORBit2],[orbit_version],[http://bugzilla.gnome.org/enter_bug.cgi?product=ORBit2],[ORBit2])
 
 # Process this file with autoconf to produce a configure script.
-# require autoconf 2.54
-AC_PREREQ(2.54)
+# require autoconf 2.60
+AC_PREREQ(2.60)
 
 # Before making a release, the LT_VERSION string should be modified.
 # The string is of the form C:R:A.
@@ -277,10 +277,11 @@ AC_SUBST(LINC_CFLAGS)
 
 dnl Checks for header files.
 AC_HEADER_STDC
+AC_HEADER_RESOLV
 AC_CHECK_HEADERS(fcntl.h unistd.h sys/endian.h endian.h machine/endian.h sys/machine.h sys/isa_defs.h 
sys/poll.h)
 AC_CHECK_HEADERS(stddef.h wchar.h wcstr.h wctype.h machine/types.h)
 AC_CHECK_HEADERS(netinet/in.h netinet/tcp.h sys/un.h)
-AC_CHECK_HEADERS(arpa/nameser.h resolv.h)
+AC_CHECK_HEADERS(arpa/nameser.h)
 dnl AC_CHECK_HEADERS(linux/irda.h)
 
 dnl Checks for library functions.