postinst is in g++ 4:5.3.1-1ubuntu1.
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 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 | #! /bin/sh -e
# remove the doc dir, if it's still a directory and replace with a symlink
pkg=`basename $0 .postinst`
if [ ! -L /usr/share/doc/$pkg ]; then
rm -rf /usr/share/doc/$pkg
ln -s cpp /usr/share/doc/$pkg
fi
# fix for report #138038: remove old diversions
if [ -n "`dpkg-divert --list /usr/bin/c++filt.binutils`" ]; then
# diversion of /usr/bin/c++filt
# to /usr/bin/c++filt.binutils
# /usr/bin/c++filt is from old g++
# /usr/bin/c++filt.binutils is from current binutils
rm -f /usr/bin/c++filt
dpkg-divert --package g++ --rename --remove /usr/bin/c++filt \
|| true
fi
if [ -n "`dpkg-divert --list /usr/man/man1/c++filt.binutils.1.gz`" ]; then
# diversion of /usr/man/man1/c++filt.1.gz
# to /usr/man/man1/c++filt.binutils.1.gz
# /usr/man/man1/c++filt.1.gz is from old g++
# /usr/man/man1/c++filt.binutils.1.gz does not exist any more
# /usr/share/man/man1/c++filt.1.gz is from current binutils
rm -f /usr/man/man1/c++filt.1.gz
dpkg-divert --package g++ --rename --remove /usr/man/man1/c++filt.1.gz \
|| true
fi
update-alternatives \
--install /usr/bin/c++ c++ /usr/bin/g++ 20 \
--slave /usr/share/man/man1/c++.1.gz c++.1.gz /usr/share/man/man1/g++.1.gz
exit 0
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