diff --git a/CHANGES b/CHANGES
index a67bc09d72..3d6f6be748 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,3 +1,5 @@
+3104.   [bug]           Better support for cross-compiling. [RT #24367]
+
 3099.	[test]		"dlz" system test now runs but gives R:SKIPPED if
 			not compiled with --with-dlz-filesystem.  [RT #24146]
 
diff --git a/configure.in b/configure.in
index cb30974844..a37d45612e 100644
--- a/configure.in
+++ b/configure.in
@@ -18,7 +18,7 @@ AC_DIVERT_PUSH(1)dnl
 esyscmd([sed "s/^/# /" COPYRIGHT])dnl
 AC_DIVERT_POP()dnl
 
-AC_REVISION($Revision: 1.457.26.33 $)
+AC_REVISION($Revision: 1.457.26.34 $)
 
 AC_INIT(lib/dns/name.c)
 AC_PREREQ(2.59)
@@ -1605,10 +1605,8 @@ char a[16],b[64]; return(inet_ntop(AF_INET6, a, b, sizeof(b)) == (char*)0);}],
 	ISC_EXTRA_OBJS="$ISC_EXTRA_OBJS inet_ntop.$O"
 	ISC_EXTRA_SRCS="$ISC_EXTRA_SRCS inet_ntop.c"
 	ISC_PLATFORM_NEEDNTOP="#define ISC_PLATFORM_NEEDNTOP 1"],
-	[AC_MSG_RESULT(assuming inet_ntop needed)
-	ISC_EXTRA_OBJS="$ISC_EXTRA_OBJS inet_ntop.$O"
-	ISC_EXTRA_SRCS="$ISC_EXTRA_SRCS inet_ntop.c"
-	ISC_PLATFORM_NEEDNTOP="#define ISC_PLATFORM_NEEDNTOP 1"])
+	[AC_MSG_RESULT(assuming inet_ntop not needed)
+	ISC_PLATFORM_NEEDNTOP="#undef ISC_PLATFORM_NEEDNTOP"])
 
 
 # On NetBSD 1.4.2 and maybe others, inet_pton() incorrectly accepts
@@ -1630,14 +1628,10 @@ main() { char a[16]; return (inet_pton(AF_INET, "1.2.3", a) == 1 ? 1 :
 	ISC_EXTRA_OBJS="$ISC_EXTRA_OBJS inet_pton.$O"
 	ISC_EXTRA_SRCS="$ISC_EXTRA_SRCS inet_pton.c"
 	ISC_PLATFORM_NEEDPTON="#define ISC_PLATFORM_NEEDPTON 1"],
-	[AC_MSG_RESULT(assuming target platform has working inet_pton)
-	ISC_PLATFORM_NEEDPTON="#undef ISC_PLATFORM_NEEDPTON"],
 	[AC_MSG_RESULT(assuming inet_pton needed)
 	ISC_EXTRA_OBJS="$ISC_EXTRA_OBJS inet_pton.$O"
 	ISC_EXTRA_SRCS="$ISC_EXTRA_SRCS inet_pton.c"
-	ISC_PLATFORM_NEEDPTON="#define ISC_PLATFORM_NEEDPTON 1"],
-	[AC_MSG_RESULT(assuming target platform has working inet_pton)
-	ISC_PLATFORM_NEEDPTON="#undef ISC_PLATFORM_NEEDPTON"])
+	ISC_PLATFORM_NEEDPTON="#define ISC_PLATFORM_NEEDPTON 1"])
 
 AC_SUBST(ISC_PLATFORM_NEEDNTOP)
 AC_SUBST(ISC_PLATFORM_NEEDPTON)
@@ -2090,8 +2084,9 @@ ISC_PLATFORM_RLIMITTYPE="#define ISC_PLATFORM_RLIMITTYPE long long int"],
 ],[AC_MSG_ERROR(this cannot happen)])
 ],[AC_MSG_ERROR(this cannot happen)])
 ],[
-ISC_PLATFORM_RLIMITTYPE="#define ISC_PLATFORM_RLIMITTYPE long long int"
-AC_MSG_RESULT(cannot determine type of rlim_cur when cross compiling - assuming long long int)])
+AC_ARG_WITH(rlimtype, , rlimtype="$withval", rlimtype="long long int")
+ISC_PLATFORM_RLIMITTYPE="#define ISC_PLATFORM_RLIMITTYPE $rlimtype"
+AC_MSG_RESULT(cannot determine type of rlim_cur when cross compiling - assuming $rlimtype)])
 ])
 AC_SUBST(ISC_PLATFORM_RLIMITTYPE)
 
@@ -2298,27 +2293,22 @@ if test "$use_atomic" = "yes"; then
 	[i[3456]86-*])
 		# XXX: some old x86 architectures actually do not support
 		#      (some of) these operations.  Do we need stricter checks?
-AC_TRY_RUN([
-main() {
-	exit((sizeof(void *) == 8) ? 0 : 1);
-}
-],
-		[arch=x86_64
-		have_xaddq=yes],
-		[arch=x86_32],
-		[arch=x86_32])
+                AC_CHECK_SIZEOF([void *])
+		if test $ac_cv_sizeof_void_p = 8; then
+			arch=x86_64
+			have_xaddq=yes
+		else
+			arch=x86_32
+		fi
 	;;
 	x86_64-*|amd64-*)
-AC_TRY_RUN([
-main() {
-       exit((sizeof(void *) == 8) ? 0 : 1);
-}
-],
-	       [arch=x86_64
-	       have_xaddq=yes],
-	       [arch=x86_32],
-	       [arch=x86_64
-	       have_xaddq=yes])
+                AC_CHECK_SIZEOF([void *])
+		if test $ac_cv_sizeof_void_p = 8; then
+			arch=x86_64
+			have_xaddq=yes
+		else
+			arch=x86_32
+		fi
 	;;
 	alpha*-*)
 		arch=alpha