RFR 8211360 : Change #if DEF to #if defined(DEF)

[Brian Burkhalter]

Hello Ivan,

Looks fine.

Brian

> On Aug 20, 2019, at 10:38 AM, Ivan Gerasimov <ivan.gerasimov at oracle.com> wrote:
> 
> It's a followup for JDK-8211146.
> 
> With that fix several C-preprocessor statements of form #elif __linux__ were changed to more accurate #elif defined(__linux__).
> 
> grep found a few more occurrences of the same pattern, which also would better be cleaned up.
> 
> BUGURL: https://bugs.openjdk.java.net/browse/JDK-8211360 <https://bugs.openjdk.java.net/browse/JDK-8211360>
> WEBREV: http://cr.openjdk.java.net/~igerasim/8211360/00/webrev/ <http://cr.openjdk.java.net/~igerasim/8211360/00/webrev/>
> 
> Mach5 control build/testing went fine on all platforms.
> Would you please help review?