This file is indexed.

prerm is in gcc 4:7.3.0-3ubuntu2.

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.

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#! /bin/sh -e

if [ $1 != "upgrade" ]; then
    update-alternatives --quiet --remove cc /usr/bin/gcc
    update-alternatives --quiet --remove c89 /usr/bin/c89-gcc
    update-alternatives --quiet --remove c99 /usr/bin/c99-gcc
fi



exit 0