Pretty trivial:
2023-08-10 Bruno Haible <br...@clisp.org>
readutmp: Make the header file includable from C++.
* lib/readutmp.h: Add extern "C" block.
diff --git a/lib/readutmp.h b/lib/readutmp.h
index b74d37cde3..8db549a393 100644
--- a/lib/readutmp.h
+++ b/lib/readutmp.h
@@ -56,6 +56,11 @@
#endif
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
/* Type of entries returned by read_utmp on all platforms. */
struct gl_utmp
{
@@ -279,4 +284,9 @@ char *extract_trimmed_name (const STRUCT_UTMP *ut)
int read_utmp (char const *file, idx_t *n_entries, STRUCT_UTMP **utmp_buf,
int options);
+
+#ifdef __cplusplus
+}
+#endif
+
#endif /* __READUTMP_H__ */
