preinst is in liblapack-dev 3.7.1-4ubuntu1.
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 12 13 | #!/bin/sh
set -e
# Cleanup pre-multiarch alternative
if [ "$1" = "upgrade" ] && dpkg --compare-versions "$2" lt 3.7.1-2~
then
update-alternatives --remove liblapack.so /usr/lib/lapack/liblapack.so
fi
exit 0
|