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-rw-r--r--lib/portability.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/lib/portability.h b/lib/portability.h
index b586c132..481e3f04 100644
--- a/lib/portability.h
+++ b/lib/portability.h
@@ -105,6 +105,9 @@ static inline char *basename(char *path) { return __xpg_basename(path); }
char *strcasestr(const char *haystack, const char *needle);
#endif // defined(glibc)
+// getopt_long(), getopt_long_only(), and struct option.
+#include <getopt.h>
+
#if !defined(__GLIBC__)
// POSIX basename.
#include <libgen.h>