Linux

Use a cron job. Search the forum with the key words 'cron job'

You need to take care of this before you consider the cron jobs. The trigger for the build should be a simple script/makefile with the option of Release/Debug builds. This script/makefile may recursively go into each sub-directory and call other makefiles/scripts. Consider it like this.

Parent makefile/script
|
|-- Invoke dir1/makefile
|-- Invoke dir2/makefile
|-- Invoke dir3/makefile

Are you concerned that the cron job and the manual build will overlap ? If so, when the build starts, create an empty file to indicate that the build has started. When the build fails/end remove that file. Check for the presence of that file to decide whether to start the build or not.

Redirect all output to some log file. You need to take care of this in your parent makefile/script.

Once all the build is done, collect reports of build success/failure and attach it to the mail and send it to the concerned people. Search the forum with the keywords 'email notification'.

Thank you so much for ur help, Vino!