Install bison 2.7 on Ubuntu 14.04

install-bison.sh

#!/bin/bash

mkdir /tmp/bison
cd /tmp/bison

apt-get update
apt-get install -y build-essential m4

wget http://ftp.gnu.org/gnu/bison/bison-2.7.tar.gz
tar -xvf bison-2.7.tar.gz
rm bison-2.7.tar.gz
cd bison-2.7

./configure --prefix=/usr/local/bison --with-libiconv-prefix=/usr/local/libiconv/

make
make install

ln -s /usr/local/bison/bin/bison /usr/bin/bison
ln -s /usr/local/bison/bin/yacc /usr/bin/yacc

ln -s /usr/local/bison/bin/bison /usr/bin/bison
ln: failed to create symbolic link ‘/usr/bin/bison’: File exists

dyfluid.
mv /usr/bin/bison /usr/bin/bisonq
mv /usr/bin/yacc /usr/bin/yaccq
=)

Cool, it's work for me.

hi
why are the following lines required ?

ln -s /usr/local/bison/bin/bison /usr/bin/bison
ln -s /usr/local/bison/bin/yacc /usr/bin/yacc

hi
why are the following lines required ?

ln -s /usr/local/bison/bin/bison /usr/bin/bison
ln -s /usr/local/bison/bin/yacc /usr/bin/yacc

Because the binaries were in /usr/local/bison/bin/, which wasn't in system path. This is a really old solution for Ubuntu 14.04 though. It's possible that the binaries are now linked already.