[LU-19772] build: Improve the detection of o2iblnd path

• Type: Improvement
• Resolution: Fixed
• Priority: Medium
• Fix Version/s: Lustre 2.18.0
• Severity: 3
• Assignee: Xiao Yang
• Reporter: Xiao Yang

Description

1) Make the common config/lustre-lnet.m4 do more check for o2iblnd path.

2)  The common config/lustre-lnet.m4  is the unified way to check o2iblnd path on both rhel and debian so remove the duplicated code. as below:

lustre/scripts/dkms.mkconf:
...
flavor=\$(echo \$kernelver | tr '-' '\\n' | tail -1)
if grep -F -q '.' <<< \$flavor ; then
    flavor=default;
fi
...
if [ -d /usr/src/ofa_kernel/\${flavor} ]; then
    OPTS="\${OPTS} --with-o2ib=/usr/src/ofa_kernel/\${flavor}"
elif [ -d /usr/src/ofa_kernel/default ]; then
    OPTS="\${OPTS} --with-o2ib=/usr/src/ofa_kernel/default"
fi
...