From 49f7e00ebeb343ea3716836c3fe6c1f0f4568335 Mon Sep 17 00:00:00 2001
From: Dana Robinson <43805+derobins@users.noreply.github.com>
Date: Thu, 18 Nov 2021 14:57:30 -0800
Subject: Quiets a 'set but not used' warning in h5diff_array.c (#1210)

---
 tools/lib/h5diff_array.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/tools/lib/h5diff_array.c b/tools/lib/h5diff_array.c
index 362a2f3..1b0d36f 100644
--- a/tools/lib/h5diff_array.c
+++ b/tools/lib/h5diff_array.c
@@ -1597,6 +1597,9 @@ character_compare_opt(unsigned char *mem1, unsigned char *mem2, hsize_t elemtno,
     hbool_t       both_zero = FALSE;
     double        per;
 
+    /* both_zero is set in the PER_UNSIGN macro but not used in this function */
+    (void)both_zero;
+
     HDmemcpy(&temp1_uchar, mem1, sizeof(unsigned char));
     HDmemcpy(&temp2_uchar, mem2, sizeof(unsigned char));
     H5TOOLS_START_DEBUG(" %d=%d", temp1_uchar, temp2_uchar);
-- 
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