#elif USE_UNLOCKED_IO
# include "unlocked-io.h"
#else
-# undef fflush_unlocked
-# define fflush_unlocked(x) fflush (x)
-# undef flockfile
-# define flockfile(x) ((void) 0)
-# undef funlockfile
-# define funlockfile(x) ((void) 0)
-# undef fputs_unlocked
-# define fputs_unlocked(str,stream) fputs (str, stream)
-# undef putc_unlocked
-# define putc_unlocked(c,stream) putc (c, stream)
+# if !HAVE_DECL_FFLUSH_UNLOCKED
+# undef fflush_unlocked
+# define fflush_unlocked(x) fflush (x)
+# endif
+# if !HAVE_DECL_FLOCKFILE
+# undef flockfile
+# define flockfile(x) ((void) 0)
+# endif
+# if !HAVE_DECL_FUNLOCKFILE
+# undef funlockfile
+# define funlockfile(x) ((void) 0)
+# endif
+# if !HAVE_DECL_FPUTS_UNLOCKED
+# undef fputs_unlocked
+# define fputs_unlocked(str,stream) fputs (str, stream)
+# endif
+# if !HAVE_DECL_PUTC_UNLOCKED
+# undef putc_unlocked
+# define putc_unlocked(c,stream) putc (c, stream)
+# endif
#endif
#if _LIBC