[Bug pch/108732] Pre-compiled headers cannot be output to /dev/null

[matt at immute dot net via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108732

--- Comment #5 from Matt Hellige <matt at immute dot net> ---
That makes sense, but it's just a strange inconsistency from a usability point
of view.

.so files are generally mmapped as well, I believe, aren't they? But I can
still generate one to /dev/null if I like:

   $ gcc12.2.0 -o /dev/null -rdynamic -shared foo.o bar.o -lrt ...

Works fine.