Build and install MySQL 5.1 from source on Ubuntu 16.04

build_mysql.sh

#!/bin/bash
# Run as root

set -e

apt-get update
apt-get install -y build-essential
apt-get install -y libncurses5-dev
useradd mysql

cd
wget http://dev.mysql.com/get/Downloads/MySQL-5.1/mysql-5.1.73.tar.gz
tar xzvf mysql-5.1.73.tar.gz
cd mysql-5.1.73

./configure \
'--prefix=/usr' \
'--exec-prefix=/usr' \
'--libexecdir=/usr/sbin' \
'--datadir=/usr/share' \
'--localstatedir=/var/lib/mysql' \
'--includedir=/usr/include' \
'--infodir=/usr/share/info' \
'--mandir=/usr/share/man' \
'--with-system-type=debian-linux-gnu' \
'--enable-shared' \
'--enable-static' \
'--enable-thread-safe-client' \
'--enable-assembler' \
'--enable-local-infile' \
'--with-fast-mutexes' \
'--with-big-tables' \
'--with-unix-socket-path=/var/run/mysqld/mysqld.sock' \
'--with-mysqld-user=mysql' \
'--with-libwrap' \
'--with-readline' \
'--with-ssl' \
'--without-docs' \
'--with-extra-charsets=all' \
'--with-plugins=max' \
'--with-embedded-server' \
'--with-embedded-privilege-control'
make
make install

mkdir -p /etc/mysql
mkdir -p /var/lib/mysql
mkdir -p /etc/mysql/conf.d
echo -e '[mysqld_safe]\nsyslog' > /etc/mysql/conf.d/mysqld_safe_syslog.cnf
cp /usr/share/mysql/my-medium.cnf /etc/mysql/my.cnf
sed -i 's#.*datadir.*#datadir = /var/lib/mysql#g' /etc/mysql/my.cnf
chown mysql:mysql -R /var/lib/mysql

mysql_install_db --user=mysql
mysqld_safe -user=mysql &
/usr/bin/mysql_secure_installation

cp /usr/share/mysql/mysql.server /etc/init.d/mysql
chmod +x /etc/init.d/mysql
update-rc.d mysql defaults

@RayNawara it doesn't particularly matter, because on line 11, it executes cd with no arguments, which will change to the home directory of whatever user you're logged in as (likely /root if you're running as root per the usage instructions on line 2) and it will do the remaining tasks from there.

@predators46 I think your problem is related to openwrt and gcc, not only mysql. I see you already tried asking on the openwrt forum and received no answers.

It looks like solution above ("patch mysql.cc") allowed you to get past the "narrowing conversion" error, but now you have a different problem. I don't know the answer, but try searching the web for "undefined reference to __sync_fetch_and_add_8". You are on a special journey, good luck.