-shell_t shell=BASH; /* The shell we generate output for. */
-int quiet_errors=0; /* 0 is not quiet. */
-int quiet_output=0; /* 0 is not quiet. */
-int quote=1; /* 1 is do quote. */
-int alternative=0; /* 0 is getopt_long, 1 is getopt_long_only */
+static shell_t shell=BASH; /* The shell we generate output for. */
+static int quiet_errors=0; /* 0 is not quiet. */
+static int quiet_output=0; /* 0 is not quiet. */
+static int quote=1; /* 1 is do quote. */
+static int alternative=0; /* 0 is getopt_long, 1 is getopt_long_only */