[patch] Fix zero builds for non-listed architectures

[Severin Gehwolf]

On Tue, 2016-08-30 at 14:33 +0200, Matthias Klose wrote:
> The zero build for architectures not explicitly listed fails currently in
> hotspot, because of an unset macro, and the compiler complains about a single -D
> option passed.
> 
> Here are two proposals how to fix these:
> 
>  - Not passing the -D<cpu_define> if it is not set. Afaik the define
>    is only used for hotspot builds, not for zero builds.
> 
>  - Provide a fall back for "unknown" zero architectures.
> 
> Matthias

I've filed this bug for this:
https://bugs.openjdk.java.net/browse/JDK-8165441

Cheers,
Severin