Why isn't cppcheck not part of GCC or CLang?

[theuserbl]

I know cppcheck is license-incompatible for it. But why a separate project, instead of having something like that in an compiler?
Or having newer compiler something like cppcheck already implemented?

Greetings
theuserbl

[Daniel Marjamäki]

It might sound good in theory. But I am not very interested to join gcc/clang for these reasons:
* I do not want to abandon allowing nonstandard code and easy and quick setup. I also do not want to abandon the "no false positives" goal.
* I have contributed to clang and this development is slow and painful. A build takes hours. When you have a patch it must be reviewed and you are lucky if it is reviewed quickly. I get 100 times more done in the cppcheck repo in the same time.

I don't mean to discredit Clang. Clang is a great project, but in my humble opinion it got "too popular". I think the code owners have problems with the tsunami of patches coming.