RFR: Fixing GCC 7.3.1 build issues

[Stefan Karlsson]

Looks good.

StefanK

On 2018-03-15 15:05, Per Liden wrote:
> We noticed that building the ZGC repo with a recent gcc (like 7.3.1) 
> didn't work (it's more picky and generates additional warnings, etc). So 
> here are patches to fix that.
> 
> ZGC: Avoid treating oops as volatile in root barriers
> http://cr.openjdk.java.net/~pliden/zgc/make_root_barriers_non_volatile/webrev.0 
> 
> 
> ZGC: Avoid compiler warning about implicit dereference of volatile oop
> http://cr.openjdk.java.net/~pliden/zgc/avoid_implicit_dereference_of_volatile_oop/webrev.0 
> 
> 
> ZGC: Avoid oop cast issue in security manager
> http://cr.openjdk.java.net/~pliden/zgc/avoid_oop_cast_issue_in_security_manager/webrev.0 
> 
> 
> ZGC: TEMPORARY: Avoid compiler warnings about using the deprecated 
> readdir_r
> http://cr.openjdk.java.net/~pliden/zgc/temporary_fix_for_deprecated_readdir/webrev.0 
> 
> 
> I'm also planning on bringing in Erik's fix of JDK-8199685 (Access 
> arraycopy build failure with GCC 7.3.1), when that goes in upstream.
> 
> /Per