preinst is in g++-5-arm-linux-gnueabihf 5.4.0-6ubuntu1~16.04.9cross1.
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 8 9 10 11 | #!/bin/sh
set -e
if [ "$1" = "upgrade" ] || [ "$1" = "configure" ]; then
update-alternatives --quiet --remove arm-linux-gnueabihf-g++ /usr/bin/arm-linux-gnueabihf-g++-5
fi
exit 0
|