I have a workspace in Cloud 9 IDE which was created more than 2 years ago. At that time I created simple C application to test MySQL connection. I remember application worked at that time.
Now after a long period of time I try to recompile my test application but I found that there is no mysql.h header file in the Cloud 9 virtual machine.
mysql-ctl seems to work: it reports that mysql is running. but there is no mysql headres in the filesystem.
So I think I need to reinstall MySQL in Cloud 9 but I cannot find any documentation on this topic. Also it looks like their own package manager c9pm is not supported anymore.
So how can I reinstall MySQL in Cloud 9 virtual machine?
Since there was a completely new version Cloud9 almost a year ago (https://c9.io/blog/announcing-the-all-new-cloud9-development-environment/) I can imagine something like a compilation against mysql.h got broken. I would create a new workspace and transfer your files to that workspace (use File > Download Project). In the "new" Cloud9 you can simply use sudo apt-get install to install software rather than use c9pm.