[IMPALA-9034] ccache + distcc doesn't work with local ccache

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: Impala 3.3.0
• Fix Version/s: Impala 3.4.0
• Component/s: Infrastructure
• Target Version: Impala 3.4.0
• Epic Color: ghx-label-6
• Assignee: Tim Armstrong
• Reporter: Tim Armstrong
• Created: 10/Oct/19 00:45
• Updated: 19/Nov/19 05:46
• Resolved: 16/Oct/19 00:33

Description

I've been noticing this for a while that ccache doesn't actually get local hits when I'm using distcc. I think I broke this with IMPALA-4701. It seems like the proper way to do wrapper scripts with ccache is to use CCACHE_PREFIX https://ccache.dev/manual/3.4.html#_using_ccache_with_other_compiler_wrappers.

Anyway I played around with this and got it to work nicely and it makes local builds when switching branches much faster.