ccache problem

[Magnus Ihse Bursie]

On 2012-10-05 09:58, Henri Gomez wrote:
>> At least for configure to pick up ccache we require 3.1.4, but your run with
>> 2.4 seems to get a considerable speedup anyway. Are you forcing the use of
>> ccache in any way outside of configure?
> No forcing of ccache.
>
> build script used is here :
>
> https://github.com/hgomez/obuildfactory/blob/master/openjdk8/linux/build.sh

I agree with Erik, it sounds like ccache is used anyway.

Some questions: What does the configure script say at the end about ccache?

Do you have ccache configured to prepend /usr/lib/ccache to the PATH? If 
so, configure will pick up a ccache as a compiler. The latest version of 
build-infra will detect this and avoid it if ccache is too old. Do your 
configure log say something like:
checking if CC is disguised ccache... no, keeping CC
?

If this line is not included, you don't have run the version of 
build-infra with this check. (It's rather new.)

Going back to your original problem:
> Generating precompiled header precompiled.hpp.gch
> ccache: FATAL: Could not create
> /home/builder/.ccache/0/6/9ce0175bc51dbb1445da6876e55dfa-3245504.o.tmp.stdout.agent-builder-f1732.obuildfactory.org.18119
> (permission denied?)

Do you see this on systems with ccache 2.4? I think this is the very 
reason why we decided to ban ccache versions lower than 3.1.6, since 
they can't handle precompiled headers properly.

/Magnus