[cfe-dev] Clang warning for invalid casting!

[Raphael Isemann via cfe-dev]

Clang 3.8 gives an error as expected, so the problem is probably in
your setup. See https://godbolt.org/g/Uf6XyX

- Raphael

2017-07-27 4:05 GMT+02:00 David John via cfe-dev <cfe-dev at lists.llvm.org>:
> I am trying to compile a simple code (see below) with gcc and clang. the gcc
> generates a warning indicating an incomparable casting (great!). However,
> clang didn't generate any warnings! I have passed the same arguments for
> both:
>
> cc -Wall -Wextra tmp3.c
> gcc -Wall -Wextra tmp3.c
>
> Should I expect clang to generate error or not? If yes, is there an
> additional option needs to be passed to clang compiler to generate a warning
> for something that is obviously wrong?
>
> Code:
>
> int main(void)
> {
>    void *b = (void *)0x12345678;
>    int   a = (int)(unsigned long)b;
>    int   c = (int)b;
>    return a + c;
> }
>
>
> Clang version 3.8
>
>
>
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