CODEWITHSUNDEEP
c++clang-tidy
helloworld95
helloworld95

Reputation: 396

Why is clang-tidy scanning other header files?

I'm running clang-tidy on a header file header.h. However as some of the warning outputs, it's outputting system headers:

.../include/c++/8/bits/std_abs.h:46:8: error: expected identifier or '(' [clang-diagnostic-error]
extern "C++"
../include/c++/8/cctype:62:1: error: unknown type name 'namespace' [clang-diagnostic-error]
namespace std
../include/c++/8/cctype:62:14: error: expected ';' after top level declarator [clang-diagnostic-error]
namespace std
..
etc

The problem: I don't want to see the warnings for anything other than the source file I'm scanning, for either a source file or header file.

I've tried implementing the fix here (What is the correct way of providing header-filter for clang-tidy in Cmake?) using --header-filter but it didnt work. I added the path to the header file that I was scanning in the regex, but I was still seeing the system header warnings.

Upvotes: 1

Views: 1360

Answers (1)

pablo285
pablo285

Reputation: 2663

For clang-tidy to work your code needs to be compile-able by the clang backend to generate an AST. This is apparently not the case since clang-diagnostic-error is basically a compilation error.

The problem is you are including headers that cannot be compiled by clang, there is no way to filter that out.

Upvotes: 1

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