[Bug middle-end/60092] posix_memalign not recognized to derive alias and alignment info

[schwab@linux-m68k.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60092

--- Comment #11 from Andreas Schwab <schwab@linux-m68k.org> ---
If a function is not allowed to change errno this must be explicitly
documented.