[cfe-dev] Feature request: Don't warn for specified "unknown" attribute

Justin Bassett via cfe-dev cfe-dev at lists.llvm.org
Mon Apr 15 20:01:23 PDT 2019

The following code will emit a warning with -Wattributes:

void call_me();

<source>:1:3: warning: unknown attribute 'some_attribute' ignored

However, this warning is very useful for detecting typos of standard
attributes. AFAIK, there's no way to turn off the warning just for one
attribute, just all of them (-Wno-unknown-attributes).

To solve this, I propose that we add the ability to specify attributes to
ignore for -Wunknown-attributes. In other words, something like this:

There are some alternatives, such as only warning if the edit distance is
close to a known attribute, but I think that specifying the known attribute
in the build system like this is better, as it will also catch
misspellings of [[some_ns::some_attribute]].

Thank you,
Justin Bassett
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.llvm.org/pipermail/cfe-dev/attachments/20190415/94fd76a9/attachment.html>

More information about the cfe-dev mailing list