ccompilationclangcl

MSVC allows void functions to return a value (Compiler Warning C4098) yet clang does not

I have the following C code, which returns a value from a void function.

void foo() {
    // do something
    return 0;
}

int main() {
    foo();
    return 0;
}

I expect this code to fail compilation and Clang fails with an error. However, MSVC allows this with a warning: warning C4098: 'foo': 'void' function returning a value

I would like Clang to behave as MSVC does. Is there a way to configure Clang such that it will also allow this? I've tried clang-cl and the flag -fms-compatibility to no avail.

Solution

  • It is quite easy.

    Add to your command line -Wno-error=return-type

    Example: https://godbolt.org/z/P4vePWEcT

    It will not treat this warning as an error.