8258925: configure script failed on WSL

Reviewed-by: dholmes, erikj

make/scripts/fixpath.sh

@@ -1,6 +1,6 @@
 #!/bin/bash
 #
-# Copyright (c) 2020, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2020, 2021, Oracle and/or its affiliates. All rights reserved.
 # DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 #
 # This code is free software; you can redistribute it and/or modify it
@@ -145,11 +145,14 @@ function import_path() {
   fi
 
   if [[ "$path" != "" ]]; then
+    # Store current unix path
+    unixpath="$path"
     # Now turn it into a windows path
     winpath="$($PATHTOOL -w "$path" 2>/dev/null)"
     # If it fails, try again with an added .exe (needed on WSL)
     if [[ $? -ne 0 ]]; then
-      winpath="$($PATHTOOL -w "$path.exe" 2>/dev/null)"
+      unixpath="$unixpath.exe"
+      winpath="$($PATHTOOL -w "$unixpath" 2>/dev/null)"
     fi
     if [[ $? -eq 0 ]]; then
       if [[ ! "$winpath" =~ ^"$ENVROOT"\\.*$ ]] ; then
@@ -159,11 +162,11 @@ function import_path() {
           # This monster of a command uses the %~s support from cmd.exe to
           # reliably convert to short paths on all winenvs.
           shortpath="$($CMD /q /c for %I in \( "$winpath" \) do echo %~sI 2>/dev/null | tr -d \\n\\r)"
-          path="$($PATHTOOL -u "$shortpath")"
-          # Path is now unix style, based on short name
+          unixpath="$($PATHTOOL -u "$shortpath")"
+          # unixpath is based on short name
         fi
         # Make it lower case
-        path="$(echo "$path" | tr [:upper:] [:lower:])"
+        path="$(echo "$unixpath" | tr [:upper:] [:lower:])"
       fi
     else
       # On WSL1, PATHTOOL will fail for files in envroot. If the unix path