build: mark PCL and YAML_CPP as SYSTEM

[xmfcx]

PR Type

• Bug Fix

Related Links

Closes:

• Eliminate PCL related build warnings #95

Description

See the issue.

Review Procedure

Here are the warnings from the nebula repo CI without this PR:

• https://github.com/tier4/nebula/actions/runs/6887317522/job/18734317419#step:7:3901

You can check the CI build logs and see if the warnings are gone.

• https://github.com/tier4/nebula/actions/runs/6888656166/job/18738066582?pr=96#step:6:3935

Also the total lines in the build output went from 6438 -> 5440, 1000 line reduction.

Remarks

Pre-Review Checklist for the PR Author

PR Author should check the checkboxes below when creating the PR.

• Assign PR to reviewer

Checklist for the PR Reviewer

Reviewers should check the checkboxes below before approval.

• Commits are properly organized and messages are according to the guideline
• (Optional) Unit tests have been written for new behavior
• PR title describes the changes

Post-Review Checklist for the PR Author

PR Author should check the checkboxes below before merging.

• All open points are addressed and tracked via issues or tickets

CI Checks

• Build and test for PR: Required to pass before the merge.

[drwnz]

LGTM!