Re: [Boost-users] Why is BOOST_OS_WINDOWS defined on Linux

Subject: Re: [Boost-users] Why is BOOST_OS_WINDOWS defined on Linux
From: Chris Glover (c.d.glover_at_[hidden])
Date: 2018-05-03 21:27:02

On Thu, 3 May 2018 at 14:49 David Demelier via Boost-users <
boost-users_at_[hidden]> wrote:

> Hello,
>
> Everything is in the title, the following code compiles and shows
> "Windows" even though I'm running Fedora 28. I can't understand.
>
>     #include <iostream>
>
>     #include <boost/predef.h>
>
>     int main()
>     {
>     #if defined(BOOST_OS_WINDOWS)
>         puts("Windows");
>     #endif
>     }
>
> I'm using Boost 1.66 with GCC 8.0.1.
>
> Regards,
>
> --
> David
>

Hi David,

The correct way to check is not if BOOST_OS_WINDOWS is defined or not, but
whether it's non-zero or not.

#include <iostream>
#include <boost/predef.h>

int main()
{
#if BOOST_OS_WINDOWS
    puts("Windows");
#endif
}

-- chris