Open
Description
clang-tidy version:
LLVM (http://llvm.org/):
LLVM version 18.1.6
Optimized build.
Consider following C file main.c
#include <net/if.h>
#include <stdio.h>
int main(int argc, char **argv) {
printf("%d\n", IFF_LOOPBACK);
return 0;
}
Running check misc-include-cleaner
like in command:
clang-tidy --checks=misc-include-cleaner main.c --
Results in the following false warning:
1 warning generated.
main.c:1:1: warning: included header if.h is not used directly [misc-include-cleaner]
1 | #include <net/if.h>
| ^~~~~~~~~~~~~~~~~~~
2 | #include <stdio.h>
When applying suggestion then recompile using clang main.c
, we will get following compilation error:
main.c:5:18: error: use of undeclared identifier 'IFF_LOOPBACK'
5 | printf("%d\n", IFF_LOOPBACK);
| ^
1 error generated.
net/if.h
is from glibc library, and we may see its contents in:
https://sourceware.org/git/?p=glibc.git;a=blob;f=sysdeps/gnu/net/if.h;hb=e84eabb3871c9b39e59323bf3f6b98c2ca9d1cd0