From cb01a66991bd10ce06a75899bd5503067cb25ace Mon Sep 17 00:00:00 2001
From: Allen Byrne <byrn@hdfgroup.org>
Date: Mon, 18 Dec 2017 10:45:48 -0600
Subject: HDFFV-10307 Add toupper function

---
 src/H5system.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/H5system.c b/src/H5system.c
index a8726c2..7b3a0eb 100644
--- a/src/H5system.c
+++ b/src/H5system.c
@@ -1043,7 +1043,7 @@ H5_build_extpath(const char *name, char **extpath /*out*/)
          * Unix: does not apply
          */
         if(H5_CHECK_ABS_DRIVE(name)) {
-            drive = name[0] - 'A' + 1;
+            drive = toupper(name[0]) - 'A' + 1;
             retcwd = HDgetdcwd(drive, cwdpath, MAX_PATH_LEN);
             HDstrncpy(new_name, &name[2], name_len);
         } /* end if */
-- 
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