[Bug preprocessor/60875] `_Pragma("message \"foo\")"` doesn't work in expression contexts.

[thakis at chromium dot org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60875

--- Comment #2 from thakis at chromium dot org ---
That only works on declarations, not in an expression, right?

(We do have a workaround that works with gcc. But "pragma message" matches the
semantics of what we want to do, and it works with MSVC and clang, so it'd be
nice if it worked in gcc too.)