Using clang-tidy to analize embedded GCC project

Question

I'm trying to use clang-tidy to parse my project, compiled by arm-none-eabi-g++.

Unfortunately, clang-tidy is not able to find compiler headers, even when given the include path to them.

My compile_commands.json is

  [   
    {
    "directory": "C:/LMA/repo/clang-tidy",
    "arguments": [
      "arm-none-eabi-c++",
      "-IC:/nxp/MCUXpressoIDE_11.2.1_4149/ide/tools/arm-none-eabi/include/c++/9.2.1",
      "-IC:/nxp/MCUXpressoIDE_11.2.1_4149/ide/tools/arm-none-eabi/include/c++/9.2.1/arm-none-eabi/arm/v5te/hard",
      "test.cpp"
    ],
    "file": "./test.cpp"   } ]

And the example test.cpp file is:

#include <cstdint>
#include <cstdlib>

int test()
{
  int temp;
  return 0;
}

Clang-tidy shows error:

C:/nxp/MCUXpressoIDE_11.2.1_4149/ide/tools/arm-none-eabi/include/c++/9.2.1\cstdlib:75:15: error: 'stdlib.h' file not found [clang-diagnostic-error]
#include_next <stdlib.h>

So, it properly finds and includes cstdlib, however it is not able to find stdint.h, which is located in the exactly same folder. What's even more irritaiting, it does not include stdlib.h, even when I add

-include C:/nxp/MCUXpressoIDE_11.2.1_4149/ide/tools/arm-none-eabi/include/c++/9.2.1/stdlib.h to compiler arguments in order to force preinclude.

Any suggestions how to fix this issue are very much appreciated.

Not solved yet, not a clue what the problem may be. Maybe clang-tidy just can't work under GCC. — MLapaj, Feb 20 '21 at 18:12
Oh, could you share how you got it to find and use GCC compiler headers? — MLapaj, Feb 21 '21 at 21:11
any update on this? I cant make clang-tidy use my GCC headers as well — gvn, Nov 07 '22 at 14:20
Not really, as I mentioned in another commend, we ended up using PC-lint as our static code analyzer — MLapaj, Feb 02 '23 at 16:51

score 1 · Answer 1 · edited Jan 19 '22 at 02:31

This is a bit old, but I was having a similar issue so I figured I'd report an answer here in case anyone else comes across this while searching. It appears clang doesn't know where to find the standard library headers when compiling using arm-none-eabi. I succeeded by simply adding them.

In your case you're still missing the C headers directory, so you need to add this: C:/nxp/MCUXpressoIDE_11.2.1_4149/ide/tools/arm-none-eabi/include/

(assuming the directory structure is similar to mine).

So your compile_commands.json would be:

[ {
  "directory": "C:/LMA/repo/clang-tidy",
  "arguments": [
      "arm-none-eabi-g++",
      "-IC:/nxp/MCUXpressoIDE_11.2.1_4149/ide/tools/arm-none-eabi/include",
      "-IC:/nxp/MCUXpressoIDE_11.2.1_4149/ide/tools/arm-none-eabi/include/c++/9.2.1",
      "-IC:/nxp/MCUXpressoIDE_11.2.1_4149/ide/tools/arm-none-eabi/include/c++/9.2.1/arm-none-eabi/arm/v5te/hard",
      "test.cpp"
  ],
  "file": "./test.cpp"
} ]

You should also have arm-none-eabi-g++ instead of arm-none-eabi-c++ I believe.

Thanks, but we eventually ended up using PC-lint as our static code analyzer and I'm not able to check this solution — MLapaj, Jan 24 '22 at 08:16

Using clang-tidy to analize embedded GCC project

1 Answers1