diff -up c-ares-1.10.0/ares_build.h.in.multilib c-ares-1.10.0/ares_build.h.in

--- c-ares-1.10.0/ares_build.h.in.multilib	2013-05-13 11:40:22.697814087 +0200

+++ c-ares-1.10.0/ares_build.h.in	2013-05-13 11:40:26.236813966 +0200

@@ -96,7 +96,14 @@

 #endif

 /* The size of `long', as computed by sizeof. */

-#undef CARES_SIZEOF_LONG

+#include <bits/wordsize.h>

+#if __WORDSIZE == 32

+#define CARES_SIZEOF_LONG 4

+#elif __WORDSIZE == 64

+#define CARES_SIZEOF_LONG 8

+#else

+#error "Unknown word size"

+#endif

 /* Integral data type used for ares_socklen_t. */

 #undef CARES_TYPEOF_ARES_SOCKLEN_T

diff -up c-ares-1.10.0/configure.ac.multilib c-ares-1.10.0/configure.ac

--- c-ares-1.10.0/configure.ac.multilib	2013-05-13 11:41:00.480812797 +0200

+++ c-ares-1.10.0/configure.ac	2013-05-13 11:41:17.210812226 +0200

@@ -457,7 +457,6 @@ AC_CHECK_SIZEOF(size_t)

 AC_CHECK_SIZEOF(long)

 AC_CHECK_SIZEOF(int)

 AC_CHECK_SIZEOF(short)

-CARES_CONFIGURE_LONG

 AC_CHECK_SIZEOF(time_t)

 AC_CHECK_TYPE(long long,