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-rw-r--r--src/getopt.m41
1 files changed, 1 insertions, 0 deletions
diff --git a/src/getopt.m4 b/src/getopt.m4
index ac540af..a086c76 100644
--- a/src/getopt.m4
+++ b/src/getopt.m4
@@ -192,6 +192,7 @@ divert(0)
void print_help(void);
void print_usage(void);
divert(5)
+#include <ctype.h>
const char *program_version = [<$1>];
static char doc[] = N_("[<$3>]");
static char args_doc[] = N_("[<$4>]");

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