--- ares_build.h.in

+++ ares_build.h.in

@@ -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

--- configure.ac

+++ configure.ac

@@ -468,7 +468,6 @@ 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,

--- configure

+++ configure

@@ -18096,17 +18096,6 @@

 _ACEOF

-

-  if test -z "$ac_cv_sizeof_long" ||

-    test "$ac_cv_sizeof_long" -eq "0"; then

-    as_fn_error "cannot find out size of long." "$LINENO" 5

-  fi

-

-cat >>confdefs.h <<_EOF

-#define CARES_SIZEOF_LONG $ac_cv_sizeof_long

-_EOF

-

-

 # The cast to long int works around a bug in the HP C Compiler

 # version HP92453-01 B.11.11.23709.GP, which incorrectly rejects

 # declarations like `int a3[[(sizeof (unsigned char)) >= 0]];'.