[cfe-dev] bug? comparison of distinct pointer types ('void *' and 'void *')

[Scott R Parish]

Doing "ptr == 0" seems to work fine, but doing "ptr == (void *)0" (which
NULL expands to on my platform) doesn't. This is using the just release
llvm+clang linux 64bit binary version of clang.

[0]/tmp$ cat /tmp/ptrcmp.c
#include <stdio.h>

int
is_null(void *ptr)
{
        return ptr == NULL;
}
[0]/tmp$ clang -o /tmp/ptrcmp.o -c /tmp/ptrcmp.c
/tmp/ptrcmp.c:6:13: warning: comparison of distinct pointer types
      ('void *' and 'void *')
        return ptr == NULL;
               ~~~ ^  ~~~~
1 diagnostic generated.
[0]/tmp$