[LU-16317] dkms: missing dependencies for flex, bison and libmount-devel

• Type: Bug
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.16.0, Lustre 2.15.2
• Affects Version/s: Lustre 2.15.1
• Environment: CentOS 7.9
• Severity: 3
• Assignee: Jian Yu
• Reporter: Stephane Thiell

Description

This is likely a follow-up to LU-15967.

The lustre-client dkms for Lustre 2.15.1 fails to build on clients that don't have flex, bison, or libmount-devel installed.

checking whether to build Lustre client support... yes
checking whether to build Linux kernel modules... yes (linux-gnu)
configure: error: flex package is required to build kernel modules
configure error, check /var/lib/dkms/lustre-client/2.15.1_2_ga1696d7/build/config.log

It looks like Andreas saw it coming in this patch review: https://review.whamcloud.com/c/fs/lustre-release/+/47745

A BuildRequires for flex, bison and also libmount-devel should probably be added to the lustre (and lustre-dkms?) spec files.