> * tests/test-canonicalize.c: Protect the inclusion of null-ptr.h
> with the same guard as that used to protect usage of the null_ptr
> function
The same thing is needed in test-ptsname_r.c:
2020-02-10 Bruno Haible <br...@clisp.org>
ptsname_r-tests: Avoid unused function warning.
* tests/test-ptsname_r.c: Don't include null-ptr.h if we don't need it.
diff --git a/tests/test-ptsname_r.c b/tests/test-ptsname_r.c
index 24be52f..381e3da 100644
--- a/tests/test-ptsname_r.c
+++ b/tests/test-ptsname_r.c
@@ -36,7 +36,10 @@ SIGNATURE_CHECK (ptsname_r, int, (int, char *, size_t));
#include "same-inode.h"
-#include "null-ptr.h"
+#if GNULIB_defined_ptsname_r
+# include "null-ptr.h"
+#endif
+
#include "macros.h"
/* Compare two slave names.
