Adar Dembo reassigned KUDU-1961:

    Assignee: Adar Dembo

> devtoolset-3 defeats ccache
> ---------------------------
>                 Key: KUDU-1961
>                 URL: https://issues.apache.org/jira/browse/KUDU-1961
>             Project: Kudu
>          Issue Type: Improvement
>          Components: build
>    Affects Versions: 1.4.0
>            Reporter: Adar Dembo
>            Assignee: Adar Dembo
> When devtoolset-3 is used (via enable_devtoolset.sh on el6), it's quite 
> likely that ccache will go unused for the build. Certainly for 
> build-thirdparty.sh, and likely for the main Kudu build too (unless you go 
> out of your way to set CC/CXX=ccache when invoking cmake).
> We should be able to fix this in enable_devtoolset.sh, at least in the common 
> case where symlinks to ccache named after the compiler are on the PATH. We 
> could ensure that, following the call to 'scl enable devtoolset-3 <cmd>', 
> ccache symlinks are placed at the head of the PATH, before 
> /opt/rh/devtoolset-3/, and only then is <cmd> actually invoked. This should 
> cause ccache to be used, and it'll chain to the devtoolset-3 compiler because 
> /opt/rh/devtoolset-3/ is ahead of /usr/bin on the PATH. We may need an 
> intermediate script to do this.

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