Urg! How can I get Xcode to use this warning only with languages
that
support it and not give this silly warning otherwise?
One way to do this is to use "Other C Flags" instead of "Other
Warning Flags" and then customize "Other C++ Flags" to not contain
the flag. It's a bit messy, but it worked for me in a quick test.
Thanks for this workaround Eric.
But I don't fully follow... I see that by default
OTHER_CPLUSPLUSFLAGS =
$(OTHER_CFLAGS) and so adding -Wdiv-by-zero to OTHER_CFLAGS will of
course apply it to C++ also. This must be what you're referring to
when
you say "customize 'Other C++ Flags' to not contain the flag".
That's right.
But how
do I do that? Can I simply set "OTHER_CPLUSPLUSFLAGS = "? Will there
be unintended consequences of OTHER_CPLUSPLUSFLAGS not including the
OTHER_FLAGS as it does by default?
You can set that. The consequence is, as you mentioned, that it
won't include OTHER_CFLAGS...but as long as your OTHER_CFLAGS value
doesn't contain anything you'd want in OTHER_CPLUSPLUSFLAGS, that's OK.
Would you agree though that there needs to be a better way?
I'd like to have a better way to do this, yes.
I ask
because <rdar://4625640> got marked as "Behaves Correctly". No doubt
from gcc's view it is correct behaviour, but from _my_ view (as an
Xcode, not gcc user) I find it quite cumbersome.
I think you got this one a bit backwards. That bug's about -Winvalid-
offset-of, which is not valid for C but is valid for C++. If you set
it in OTHER_CPLUSPLUSFLAGS, you'll be fine. Better yet, use the
handy "Warn About Undefined Use of offsetof Macro" check box....
Hope this helps,
Eric
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