Adar Dembo created KUDU-1961:
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Summary: devtoolset-3 defeats ccache
Key: KUDU-1961
URL: https://issues.apache.org/jira/browse/KUDU-1961
Project: Kudu
Issue Type: Bug
Components: build
Affects Versions: 1.4.0
Reporter: Adar Dembo
When devtoolset-3 is used (via enable_devtoolset.sh on el6), it's quite likely
that ccache will go used 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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