Installation issue

[abdur-rosyid]

In my case, for installation, dependency to openslam_gmapping should be added to package.xml of gmapper package:
<depend>openslam_gmapping</depend>

And the installation starts by installing openslam_gmapping. From your workspace:
colcon build --symlink-install --packages-up-to openslam_gmapping

Afterwards, you can install gmapper. From your workspace:
colcon build --symlink-install --packages-up-to gmapper

[siddarth09]

Why dont you solve this issue, and create a PR, I will merge it!

[abdur-rosyid]

I created a PR for that.