[IMPALA-9760] Use different locations for native toolchain packages built with different compilers

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: Impala 4.0.0
• Fix Version/s: Impala 4.0.0
• Component/s: Infrastructure
• Epic Link: GCC7_newabi_upgrade
• Target Version: Impala 4.0.0
• Epic Color: ghx-label-9
• Assignee: Joe McDonnell
• Reporter: Joe McDonnell
• Created: 19/May/20 04:35
• Updated: 08/Jun/20 00:09
• Resolved: 08/Jun/20 00:09

Description

To switch to GCC 7 with the new ABI, we want to keep the packages using the old ABI and new ABI separate. This means that they will need to reside in different directories inside IMPALA_TOOLCHAIN. There is code in other repositories that depends on finding things inside IMPALA_TOOLCHAIN, so it may be easiest to have multiple phases:
1. Introducing a new variable tracking the native package location which is the same as IMPALA_TOOLCHAIN
2. Switch dependent code to use this new variable
3. Change the value of the variable to be different for different compilers