Disabling clang compiler warnings, but not static analyzer ones

Clang Frontend
1

Hi,

To test the checkers we’ve developed, we would like to disable all clang warnings, except from the ones coming from our checker. We’ve tried the -w flag, but it also suppresses our own checker’s warnings. We’re running the clang with the -Xclang -analyzer-checker=“testchecker” flags.

We have some work-around ideas (putting a unique marker string in our warnings, and filter out any warnings that do not contain them), but I feel that this is something most checker developers would run into sooner-or-later, so surely, there must be a better solution.

So how could we disable all clang warnings, except for the ones emitted by our specific checker?

Thanks!

Gabor

2

Hi,

To test the checkers we’ve developed, we would like to disable all clang warnings, except from the ones coming from our checker. We’ve tried the -w flag, but it also suppresses our own checker’s warnings.

Is there something special in your setup?
The -w flag should not/does not suppress warnings coming from the analyzer:

Ex:
$clang -w --analyze ~/tmp/ex.m
/Users/zaks/tmp/ex.m:4:11: warning: Division by zero

return 5/zero + 5/0;
~^~~~~
1 warning generated.

3

Thanks Anna, you’re right, it works when passed directly to clang, but not when using -Xclang.