From 6184e940b2fd356a3f9e95255b2be0bdcdbdaa0a Mon Sep 17 00:00:00 2001
From: Andrius Merkys <andrius.merkys@gmail.com>
Date: Thu, 30 Jun 2022 10:44:20 +0300
Subject: [PATCH] Retype `opt` from `char` to `int` as `char` may be unsigned
 on ARM architectures.

---
 src/main.cc | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/main.cc b/src/main.cc
index 8b09305..e7346d6 100644
--- a/src/main.cc
+++ b/src/main.cc
@@ -530,7 +530,7 @@ static int
 parse_arg(int argc, char **argv, struct cli_state *state)
 {
     int alg_set = 0;
-    char opt;
+    int opt;
     int n_opt = 'z' + 1;
     char opt_set['z' + 1];
     int option_index = 0;
@@ -540,7 +540,7 @@ parse_arg(int argc, char **argv, struct cli_state *state)
 
     while ((opt = getopt_long(argc, argv, options_string,
                               long_options, &option_index)) != -1) {
-        opt_set[(int)opt] = 1;
+        opt_set[opt] = 1;
         /* Assume arguments starting with dash are actually missing arguments */
         if (optarg != NULL && optarg[0] == '-') {
             if (option_index > 0)