|| GNULIB_defined_EOWNERDEAD \
|| GNULIB_defined_ENOTRECOVERABLE \
|| GNULIB_defined_EILSEQ
-extern const char *strerror_override (int errnum);
+extern const char *strerror_override (int errnum) _GL_ATTRIBUTE_CONST;
# else
# define strerror_override(ignored) NULL
# endif