Installing Squid proxy on Ubuntu 18.04 by building from source

Squid-Installation-Ubuntu-18.04-from-source.md

Installing prequisites

apt install g++
apt install make
apt install libssl1.0-dev

Building package

./configure --with-openssl \
  --prefix=/usr/local/squid \
  --sysconfdir=/etc/squid \
  --with-default-user=proxy \
  --with-logdir=/var/log/squid \
  --with-pidfile=/var/run/squid.pid \
  --enable-ssl-crtd
make
make install

Make logdir

mkdir -p /var/log/squid
chown -R proxy:proxy /var/log/squid

Initialize ssl_db

/usr/local/squid/libexec/ssl_crtd -c -s /var/lib/ssl_db

Start Squid Server

/usr/local/squid/sbin/squid

In case things stop working

• Remove /var/lib/ssl_db directory and recreate as above.

A mess to compile the latest version 4.0.25.

1. An error '__builtin___snprintf_chk’ output between ? and ?? bytes into a destination of size ??? which google tells me is a bug in GCC and can be ignored.
2. Some warning about _REENTRANT not being defined.

And a host of other issues. Finally got it to compile with the following command.

make CFLAGS="-Wall -g -O2 -Wno-error=stringop-truncation -Wno-unknown-warning -Wno-cpp" SQUID_CXXFLAGS=""

At different points during the compilation, you may have to remove the last part of the command:

make CFLAGS="-Wall -g -O2 -Wno-error=stringop-truncation -Wno-unknown-warning -Wno-cpp"

Note: gcc --version shows gcc (Ubuntu 9.4.0-1ubuntu1~20.04.1) 9.4.0