Allowed or not?

[Kleuske]

Hi,

I have the following code, which works fine under Borland C++ and is refused
by GCC and a subsequent debate on whether or not it's OK. My vote is it's
*not*, since 'sizeof' is not known in the preprocessor.

<code>
#include <stdio.h>

/* checking the sie of a defined type */
#if (sizeof(unsigned long) != 4)
#error Nononononono...
#endif

int main(int argc, char* argv[])
{
printf("*** Yes\n");
return 0;
}
</code>

Question: Is this OK? Compiler dependent? Dead wrong?

Thanks in advance for your comments...

Regards,

Kleuske.

 

[Kleuske]

"Kleuske" <[email protected]> schreef in bericht

Question: Is this OK? Compiler dependent? Dead wrong?

Ok I was right. It's *not* OK.

See

http://www.lns.cornell.edu/public/COMP/info/egcs/cpp/cpp_1.html#SEC32

http://www.eskimo.com/~scs/C-faq/q10.13.html

Bye...