Header file parsing problem

Clang Frontend clangd
1

Hi！I encountered a problem when using vscode and clangd to read code in the WSL environment: c.h references a.h and b.h sequentially, but b.h does not reference a.h. When b.h uses a variable declared in a.h, clangd will report an error(“Use of undeclared identifier ‘someVariable’ (fix available)clang(undeclared_var_use)”).But the compilation can be passed .How can this be resolved?

#pragma once
#ifndef A_H  
#define A_H  

extern int someVariable;

#endif // A_H

#pragma once
#ifndef B_H  
#define B_H  

void someFunction() {
    someVariable = 42;
}

#endif // B_H

#include "a.h" // 显式包含 a.h 以确保 someVariable 的声明可见  
#include "b.h"  

#include <stdio.h>  
#include "c.h" 

int someVariable = 0; 

int main() {
    someFunction(); 
    printf("someVariable is now: %d\n", someVariable);
    return 0;
}
2

This is a known issue, please see Support non-self-contained files · Issue #45 · clangd/clangd · GitHub.

3

Thank you. The problem has been solved