+@item
+This function is not declared unless @code{_REENTRANT} is defined,
+on some platforms:
+HP-UX 11.
+@item
+This function has an incompatible declaration on some platforms:
+Solaris 11 2010-11 (when @code{_POSIX_PTHREAD_SEMANTICS} is not defined).
+@item
+This function returns a truncated result, instead of failing with error code
+@code{ERANGE}, when the buffer is not large enough, on some platforms:
+OSF/1 5.1.