From 93834ec9c4fda1dc98fcf44f65b9a6794bea5f2b Mon Sep 17 00:00:00 2001
From: Hyo-Kyung Lee <hyoklee@hdfgroup.org>
Date: Fri, 22 Sep 2023 23:35:51 -0500
Subject: [PATCH] Remove NVHPC [set_but_not_used] warning.

---
 testpar/t_subfiling_vfd.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/testpar/t_subfiling_vfd.c b/testpar/t_subfiling_vfd.c
index 7d0665d45bd..0400c305f40 100644
--- a/testpar/t_subfiling_vfd.c
+++ b/testpar/t_subfiling_vfd.c
@@ -2347,7 +2347,8 @@ main(int argc, char **argv)
         must_unset_ioc_thread_count_env = true;
     }
 
-    if (!(env_value = HDgetenv(H5FD_SUBFILING_CONFIG_FILE_PREFIX))) {
+    env_value = HDgetenv(H5FD_SUBFILING_CONFIG_FILE_PREFIX);
+    if (NULL != env_value) {
         int rand_value = 0;
 
         if (MAINPROCESS)