[IMPALA-4701] ccache does not understand that distcc.sh could be clang or gcc

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: Impala 2.8.0
• Fix Version/s: Impala 2.9.0
• Component/s: Infrastructure
• Target Version: Product Backlog
• Assignee: Tim Armstrong
• Reporter: Jim Apple
• Created: 20/Dec/16 21:05
• Updated: 03/Apr/17 22:51
• Resolved: 03/Apr/17 22:51

Description

When distcc is used, the compilation commands start with distcc.sh, not g++ or clang++. ccache then thinks that distcc.sh commands with the same parameters should produce the same results, but that's not true: distcc picks up its compiler from the environment, not from the parameters.

Perhpas this could be fixed by adding a parameter to distcc for the compiler, rather than relying on the environment, or making distcc-gcc.sh and distcc-clang.sh.