Updated configure with newer autoconf

configure

@@ -6120,7 +6120,7 @@ if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
 else
   ac_cv_header_stdc=no
 fi
-rm -f conftest*
+rm -f -r conftest*
 
 fi
 
@@ -6141,7 +6141,7 @@ if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
 else
   ac_cv_header_stdc=no
 fi
-rm -f conftest*
+rm -f -r conftest*
 
 fi
 
@@ -15964,7 +15964,7 @@ if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
 else
   ac_cv_header_stdc=no
 fi
-rm -f conftest*
+rm -f -r conftest*
 
 fi
 
@@ -15985,7 +15985,7 @@ if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
 else
   ac_cv_header_stdc=no
 fi
-rm -f conftest*
+rm -f -r conftest*
 
 fi
 
@@ -16376,7 +16376,7 @@ if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
 else
   ac_cv_define_M_PI=no
 fi
-rm -f conftest*
+rm -f -r conftest*
 
 
 fi
@@ -16573,7 +16573,7 @@ if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
 else
   ac_cv_os_cray=no
 fi
-rm -f conftest*
+rm -f -r conftest*
 
 fi
 { echo "$as_me:$LINENO: result: $ac_cv_os_cray" >&5
@@ -22641,7 +22641,7 @@ _ACEOF
       eval "ac_im_$ac_var=\`\${MAKE-make} $ac_var 2>/dev/null | sed -n 's/^$ac_var=//p'\`"
     done
     # Open Windows xmkmf reportedly sets LIBDIR instead of USRLIBDIR.
-    for ac_extension in a so sl; do
+    for ac_extension in a so sl dylib la dll; do
       if test ! -f "$ac_im_usrlibdir/libX11.$ac_extension" &&
 	 test -f "$ac_im_libdir/libX11.$ac_extension"; then
 	ac_im_usrlibdir=$ac_im_libdir; break
@@ -22794,7 +22794,7 @@ sed 's/^/| /' conftest.$ac_ext >&5
 for ac_dir in `echo "$ac_x_includes $ac_x_header_dirs" | sed s/include/lib/g`
 do
   # Don't even attempt the hair of trying to link an X program!
-  for ac_extension in a so sl; do
+  for ac_extension in a so sl dylib la dll; do
     if test -r "$ac_dir/libX11.$ac_extension"; then
       ac_x_libraries=$ac_dir
       break 2