BSD variables not declared? (jdk8 & jdk 9 builds)

[Magnus Ihse Bursie]

On 2015-04-12 17:01, Martijn Verburg wrote:
> Hi all,
>
> On Mac OS X 10.10.2 using gcc 4.8 run make clean images
>
> When compiling either jdk8 or jdk9 from scratch I get the following BSD
> undefined errors:
>
> Compiling
> /Users/karianna/Documents/workspace/AdoptOpenJDK_projects/jdk8/hotspot/src/os/bsd/vm/os_bsd.cpp
> /Users/karianna/Documents/workspace/AdoptOpenJDK_projects/jdk8/hotspot/src/os/bsd/vm/os_bsd.cpp:1150:7:
> error: "__FreeBSD__" is not defined [-Werror=undef]
>   #elif __FreeBSD__
>         ^
> /Users/karianna/Documents/workspace/AdoptOpenJDK_projects/jdk8/hotspot/src/os/bsd/vm/os_bsd.cpp:1152:7:
> error: "__OpenBSD__" is not defined [-Werror=undef]
>   #elif __OpenBSD__
>         ^
> /Users/karianna/Documents/workspace/AdoptOpenJDK_projects/jdk8/hotspot/src/os/bsd/vm/os_bsd.cpp:1154:7:
> error: "__NetBSD__" is not defined [-Werror=undef]
>   #elif __NetBSD__

That sounds strange. Why would an undefined preprocessor variable 
trigger an error? I have never heard about this before.

Since it is in hotspot code, maybe you can get a better response by 
asking on a hotspot list.

/Magnus