Aptfile - Specify Ubuntu packages to installΒΆ

This is used by the heroku-buildpack-apt to install packages. Looking at https://github.com/heroku/heroku-buildpack-apt/blob/master/bin/compile#L43, which uses for PACKAGE in $(cat $BUILD_DIR/Aptfile); do to read the Aptfile, comments aren’t supported. Therefore, they’re placed here.

The xc16 compiler needs the lib32stdc++6 package installed, since it’s a 32-bit app. So, the Aptfile contents are: