[LU-19849] configure should not fail if libkeyutils cannot be found

• Type: Bug
• Resolution: Fixed
• Priority: Medium
• Fix Version/s: Lustre 2.18.0
• Severity: 3
• Assignee: Andreas Dilger
• Reporter: Andreas Dilger

Description

Auto-detected GSS support should not cause configure to fail if libkeyutils cannot be found:

# ./configure
checking whether to enable gss support... auto
checking whether to enable gss keyring backend... yes
checking if Linux kernel was built with CONFIG_KEYS in or as module... yes
checking for keyctl_search in -lkeyutils... no
configure: WARNING: GSS keyring backend requires libkeyutils
configure: error: Cannot enable gss_keyring. See above for details

This should only be considered an error if --enable-gss or --enable-gss-keyring is explicitly specified. Instead, if GSS support is auto-detected, then the missing libkeyutils should auto-disable GSS support.

Issue Links

• is related to: LU-11172 RPM build problem with GSSAPI
• is related to: LU-14929 Lustre does not build with GSS support because of missing libkeyutils