On Jan 9, 2014, at 2:20 PM, Richard Smith <[email protected]> wrote:
> On Thu, Jan 9, 2014 at 7:25 AM, Alp Toker <[email protected]> wrote:
>
> It's not fair on the user or the system header maintainers to bring up
> unexpected errors with this flag.
>
> I don't think this is clear. If the code in the system header is ill-formed,
> I would expect the system header maintainers to be *grateful* that we flag it
> as an error and not just as a warning. But I'll wait to hear what they have
> to say about that.
A few points, in no particular order:
* If we have ill-formed code in system headers, I would expect it to fail to
compile whether the user specifies -Wsystem-headers or not.
* If a user has a clean build, and then rebuilds with -Wsystem-headers, I would
expect to get warnings - not errors. [ Isn’t that what PR18327 is all about? ]
* There are some “interesting” language features which are only enabled for
system headers, and cause warnings if used in user code.
[ User-defined suffixes that do not start with an underscore, for example. ]
— Marshall
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