--- screen-4.0.1/configure.in~configure
+++ screen-4.0.1/configure.in
@@ -46,6 +46,7 @@
 AC_PROG_GCC_TRADITIONAL
 AC_ISC_POSIX
 
+AC_MSG_CHECKING([for compiler sanity])
 AC_TRY_RUN(main(){exit(0);},,[
 if test $CC != cc ; then
 AC_NOTE(Your $CC failed - restarting with CC=cc)
@@ -54,22 +55,17 @@
 export CC
 exec $0 $configure_args
 fi
-])
-
-AC_TRY_RUN(main(){exit(0);},,
-exec 5>&2
-eval $ac_link
-AC_NOTE(CC=$CC; CFLAGS=$CFLAGS; LIBS=$LIBS;)
-AC_NOTE($ac_compile)
-AC_MSG_ERROR(Can't run the compiler - sorry))
+],AC_MSG_WARN([skipping test due to crosscompilation]))
 
+AC_MSG_CHECKING([if compiler sets exit status])
 AC_TRY_RUN([
 main()
 {
   int __something_strange_();
   __something_strange_(0);
 }
-],AC_MSG_ERROR(Your compiler does not set the exit status - sorry))
+],AC_MSG_ERROR(Your compiler does not set the exit status - sorry),,
+AC_MSG_WARN(skipping test due to crosscompilation))
 
 AC_PROG_AWK
 
@@ -292,7 +288,8 @@
 dnl    ****  FIFO tests  ****
 dnl
 
-AC_CHECKING(fifos)
+AC_CACHE_CHECK([usable fifos],
+		[screen_cv_sys_fifo_usable],
 AC_TRY_RUN([
 #include <sys/types.h>
 #include <sys/stat.h>
@@ -357,12 +354,11 @@
     exit(1);
   exit(0);
 }
-], AC_NOTE(- your fifos are usable) fifo=1,
-AC_NOTE(- your fifos are not usable))
-rm -f /tmp/conftest*
+], screen_cv_sys_fifo_usable=yes, screen_cv_sys_fifo_usable=no))
 
-if test -n "$fifo"; then
-AC_CHECKING(for broken fifo implementation)
+if test X"$screen_cv_sys_fifo_usable" = Xyes; then
+AC_CACHE_CHECK([broken fifo implementation],
+	       [screen_cv_sys_fifo_broken_impl],
 AC_TRY_RUN([
 #include <sys/types.h>
 #include <fcntl.h>
@@ -407,9 +403,11 @@
     exit(1);
   exit(0);
 }
-], AC_NOTE(- your implementation is ok), 
-AC_NOTE(- you have a broken implementation) AC_DEFINE(BROKEN_PIPE) fifobr=1)
-rm -f /tmp/conftest*
+], screen_cv_sys_fifo_broken_impl=no, 
+screen_cv_sys_fifo_broken_impl=yes))
+if test X"$screen_cv_sys_fifo_broken_impl" = Xyes; then
+	AC_DEFINE(BROKEN_PIPE)
+fi
 fi
 
 dnl
@@ -418,7 +416,8 @@
 dnl 	may need  	LIBS="$LIBS -lsocket" 	here
 dnl
 
-AC_CHECKING(sockets)
+AC_CACHE_CHECK([sockets are usable],
+	       [screen_cv_sys_sockets_usable],
 AC_TRY_RUN([
 #include <sys/types.h>
 #include <sys/socket.h>
@@ -469,12 +468,13 @@
     exit(1);
   exit(0);
 }
-], AC_NOTE(- your sockets are usable) sock=1,
-AC_NOTE(- your sockets are not usable))
-rm -f /tmp/conftest*
+], screen_cv_sys_sockets_usable=yes,
+screen_cv_sys_sockets_usable=no))
 
-if test -n "$sock"; then
+if test X"$screen_cv_sys_sockets_usable" = Xyes; then
 AC_CHECKING(socket implementation)
+AC_CACHE_CHECK([if sockets are not stored in the filesystem],
+	       [screen_cv_sys_sockets_nofs],
 AC_TRY_RUN([
 #include <sys/types.h>
 #include <sys/stat.h>
@@ -500,22 +500,24 @@
   close(s);
   exit(0);
 }
-],AC_NOTE(- you are normal),
-AC_NOTE(- unix domain sockets are not kept in the filesystem)
-AC_DEFINE(SOCK_NOT_IN_FS) socknofs=1)
-rm -f /tmp/conftest*
+], screen_cv_sys_sockets_nofs=no,
+screen_cv_sys_sockets_nofs=yes))
+
+if test X"$screen_cv_sys_sockets_nofs" = Xyes; then
+  AC_DEFINE(SOCK_NOT_IN_FS)
+fi
 fi
 
 
 dnl
 dnl    ****  choose sockets or fifos  ****
 dnl
-if test -n "$fifo"; then
-  if test -n "$sock"; then
-    if test -n "$nore"; then
+if test X"$screen_cv_sys_fifo_usable" = Xyes; then
+  if test X"$screen_cv_sys_sockets_usable" = Xyes; then
+    if test X"$screen_cv_sys_sockets_nofs" = Xyes; then
       AC_NOTE(- hmmm... better take the fifos)
       AC_DEFINE(NAMEDPIPE)
-    elif test -n "$fifobr"; then
+    elif test X"$screen_cv_sys_fifo_broken_impl" = Xyes; then
       AC_NOTE(- as your fifos are broken lets use the sockets.)
     else
       AC_NOTE(- both sockets and fifos usable. let's take fifos.)
@@ -525,7 +527,7 @@
     AC_NOTE(- using named pipes, of course)
     AC_DEFINE(NAMEDPIPE)
   fi
-elif test -n "$sock"; then
+elif test X"$screen_cv_sys_sockets_usable" = Xyes; then
   AC_NOTE(- using unix-domain sockets, of course)
 else
   AC_MSG_ERROR(you have neither usable sockets nor usable pipes -> no screen)
@@ -535,7 +537,8 @@
 dnl    ****  check the select implementation ****
 dnl
 
-AC_CHECKING(select return value)
+AC_CACHE_CHECK([for broken select return value],
+	       [screen_cv_sys_select_broken_retval],
 AC_TRY_RUN([
 #include <sys/types.h>
 #include <sys/stat.h>
@@ -634,8 +637,11 @@
     exit(1);
   exit(0);
 }
-],AC_NOTE(- select is ok),
-AC_NOTE(- select can't count) AC_DEFINE(SELECT_BROKEN))
+], screen_cv_sys_select_broken_retval=no,
+screen_cv_sys_select_broken_retval=yes))
+if test X"$screen_cv_sys_select_broken_retval" = Xyes; then
+  AC_DEFINE(SELECT_BROKEN)
+fi
 
 dnl
 dnl    ****  termcap or terminfo  ****
@@ -663,12 +669,20 @@
 AC_TRY_LINK(,tgetent((char *)0, (char *)0);,,
 AC_MSG_ERROR(!!! no tgetent - no screen))))))
 
-AC_TRY_RUN([
+AC_CACHE_CHECK([using terminfo database],[screen_cv_sys_terminfo_used],
+	AC_TRY_RUN([
 main()
 {
  exit(strcmp(tgoto("%p1%d", 0, 1), "1") ? 0 : 1);
-}], AC_NOTE(- you use the termcap database),
-AC_NOTE(- you use the terminfo database) AC_DEFINE(TERMINFO))
+}
+	], screen_cv_sys_terminfo_used=no,
+	screen_cv_sys_terminfo_used=yes)
+)
+
+if test X"$screen_cv_sys_terminfo_used" = Xyes; then
+	AC_DEFINE(TERMINFO)
+fi
+
 AC_CHECKING(ospeed)
 AC_TRY_LINK(extern short ospeed;,ospeed=5;,,AC_DEFINE(NEED_OSPEED))
 
@@ -856,7 +870,7 @@
 #endif
 ],[struct utmp u; u.ut_host[0] = 0;], AC_DEFINE(UTHOST))
 AC_CHECK_HEADER(utempter.h, have_utempter=yes, have_utempter=no)
-if test "$have_utempter" = yes; then
+if test X"$have_utempter" = Xyes; then
   AC_DEFINE(HAVE_UTEMPTER)
   LIBS="$LIBS -lutempter"
 fi
@@ -1147,7 +1161,8 @@
 AC_CHECKING(fdwalk)
 AC_TRY_LINK([#include <stdlib.h>], [fdwalk(NULL, NULL);],AC_DEFINE(HAVE_FDWALK))
 
-AC_CHECKING(whether memcpy/memmove/bcopy handles overlapping arguments)
+AC_CACHE_CHECK([if bcopy handles overlap],
+	       [screen_cv_sys_bcopy_overlap],
 AC_TRY_RUN([
 main() {
   char buf[10];
@@ -1160,8 +1175,14 @@
   if (strncmp(buf, "cdedef", 6))
     exit(1);
   exit(0); /* libc version works properly.  */
-}], AC_DEFINE(USEBCOPY))
+}], screen_cv_sys_bcopy_overlap=yes,
+screen_cv_sys_bcopy_overlap=no))
+if test X"$screen_cv_sys_bcopy_overlap" = Xyes; then
+  AC_DEFINE(USEBCOPY)
+fi
 
+AC_CACHE_CHECK([if memmove handles overlap],
+	       [screen_cv_sys_memmove_overlap],
 AC_TRY_RUN([
 #define bcopy(s,d,l) memmove(d,s,l)
 main() {
@@ -1175,9 +1196,14 @@
   if (strncmp(buf, "cdedef", 6))
     exit(1);
   exit(0); /* libc version works properly.  */
-}], AC_DEFINE(USEMEMMOVE))
-
+}], screen_cv_sys_memmove_overlap=yes,
+screen_cv_sys_memmove_overlap=no))
+if test X"$screen_cv_sys_memmove_overlap" = Xyes; then
+  AC_DEFINE(USEMEMMOVE)
+fi
 
+AC_CACHE_CHECK([if memcpy handles overlap],
+	       [screen_cv_sys_memcpy_overlap],
 AC_TRY_RUN([
 #define bcopy(s,d,l) memcpy(d,s,l)
 main() {
@@ -1191,7 +1217,11 @@
   if (strncmp(buf, "cdedef", 6))
     exit(1);
   exit(0); /* libc version works properly.  */
-}], AC_DEFINE(USEMEMCPY))
+}], screen_cv_sys_memcpy_overlap=yes,
+screen_cv_sys_memcpy_overlap=no))
+if test X"$screen_cv_sys_memcpy_overlap" = Xyes; then
+  AC_DEFINE(USEMEMCPY)
+fi
 
 AC_MSG_CHECKING(long file names)
 (echo 1 > /tmp/conftest9012345) 2>/dev/null
@@ -1266,7 +1296,8 @@
 dnl Ptx bug workaround -- insert -lc after -ltermcap
 test -n "$seqptx" && LIBS="-ltermcap -lc -lsocket -linet -lnsl -lsec -lseq"
 
-AC_TRY_RUN(main(){exit(0);},,AC_MSG_ERROR(Can't run the compiler - internal error. Sorry.))
+AC_MSG_CHECKING(compiler sanity)
+AC_TRY_RUN(main(){exit(0);},,AC_MSG_ERROR(Can't run the compiler - internal error. Sorry.), AC_MSG_WARN(Skipping test due to crosscompilation))
 
 ETCSCREENRC="\"/usr/local/etc/screenrc\""
 if test -n "$prefix"; then