[ARROW-10361] [C++] Downgrade llvm to llvm@9 to correct build failures for gandiva

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Not A Problem
• Component/s: C++ - Gandiva
• External issue URL: https://github.com/apache/arrow/issues/26347
• Assignee: Unassigned
• Reporter: Naman Udasi
• Created: 21/Oct/20 10:43
• Updated: 11/Jan/23 08:12
• Resolved: 24/Oct/20 20:00

Description

llvm@10 was removed from homebrew and the default was changed to 11 which caused build failures for gandiva.
https://github.com/Homebrew/homebrew-core/pull/62798#issuecomment-711606370

Downgrade llvm@9 as a temporary fix for build failures.

Issue Links

• is fixed by: ARROW-10385 [C++][Gandiva] Add support for LLVM 11