Search for extensions in cpan/ as well as ext/

This required inverting the logic of test for "are we flattened or not".
Currently we can only build XS extensions on Unix from cpan/

diff --git a/Configure b/Configure
index b63287b..c97a42e 100755 (executable)
--- a/Configure
+++ b/Configure
@@ -21656,19 +21656,7 @@ find_extensions='
            *)
            this_ext=`echo $xxx | $sed -e s/-/\\\//g`;
            leaf=`echo $xxx | $sed -e s/.*-//`;
-           if $test -d File-Glob; then
-               $ls -1 $xxx > $$.tmp;
-               if   $contains "\.xs$" $$.tmp > /dev/null 2>&1; then
-                   known_extensions="$known_extensions $this_ext";
-               elif $contains "\.c$"  $$.tmp > /dev/null 2>&1; then
-                   known_extensions="$known_extensions $this_ext";
-               elif $test "$this_ext" = "IO/Compress"; then
-                   known_extensions="$known_extensions $this_ext";
-               elif $test -d $xxx; then
-                   nonxs_extensions="$nonxs_extensions $this_ext";
-               fi;
-               $rm -f $$.tmp;
-           else
+           if $test -d File; then
                if $test -f $xxx/$leaf.xs -o -f $xxx/$leaf.c; then
                    known_extensions="$known_extensions $1$this_ext";
                elif $test -f $xxx/Makefile.PL; then
@@ -21682,11 +21670,27 @@ find_extensions='
                        shift;
                    fi;
                fi;
+           else
+               $ls -1 $xxx > $$.tmp;
+               if   $contains "\.xs$" $$.tmp > /dev/null 2>&1; then
+                   known_extensions="$known_extensions $this_ext";
+               elif $contains "\.c$"  $$.tmp > /dev/null 2>&1; then
+                   known_extensions="$known_extensions $this_ext";
+               elif $test "$this_ext" = "IO/Compress"; then
+                   known_extensions="$known_extensions $this_ext";
+               elif $test -d $xxx; then
+                   nonxs_extensions="$nonxs_extensions $this_ext";
+               fi;
+               $rm -f $$.tmp;
            fi
            ;;
        esac;
     done'
 tdir=`pwd`
+cd "$rsrc/cpan"
+set X
+shift
+eval $find_extensions
 cd "$rsrc/ext"
 set X
 shift