is ccache working effectively?

[Maurizio Cimadamore]

On 08/11/2018 20:31, Erik Joelsson wrote:
> I think we need more details here to figure it out, but it doesn't 
> surprise me that hotspot is the part that's failing. Building hotspot 
> is way more complex than the rest. 

Digging more into the command lines of the various HS files, they 
include many generated sources and, also this folder:

build/<CONF>/hotspot/variant-server/libjvm/objs/precompiled

Now, I don't know exactly how ccache deals with PCH but I notices that 
every time that the files in this folder are regenerated by the build (I 
can easily do that by rerunning the same command line that is stored 
inside the , a ccache miss follows.

Maurizio