prerm is in automake1.7 1.7.9-9.1.
This file is a maintainer script. It is executed when installing (*inst) or removing (*rm) the package.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 | #!/bin/sh -e
ver=1.7
if [ "$1" = "remove" ]; then
update-alternatives --remove automake /usr/bin/automake-$ver
fi
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