The commercial edition has optimisation limitations unless a license is bought.

mkdir -p /opt/microchip
cd /opt/microchip

wget http://ww1.microchip.com/downloads/en/DeviceDoc/xc16-v1.25-full-install-linux-installer.run

chmod +x xc16-v1.25-full-install-linux-installer.run
./xc16-v1.25-full-install-linux-installer.run

Version 1.25 is missing some important include files so we need to get them from 1.24.

wget xc16-v1.24-full-install-linux-installer.run
chmod +x xc16-v1.25-full-install-linux-installer.run
./xc16-v1.24-full-install-linux-installer.run
cp -Rpa /opt/microchip/xc16/v1.24/support/peripheral_* /opt/microchip/xc16/v1.25/support/

The free edition utilises header files and libraries from the commercial edition so perform the installation steps given above. The free edition has no limitations and does not require a license for optimisations.

cd /var/tmp
apt-get install build-essential flex bison unzip mercurial zlib1g-dev
hg clone http://hg.kewl.org/pub/pic30
cd pic30

wget http://ww1.microchip.com/downloads/en/DeviceDoc/v1.25.src.zip

./install

This also depends on the commercial edition which must be installed as given above.

Raspbian

mkdir -p /embedded/raspbian/opt/microchip/xc16/v1.25/
cd /embedded/raspbian/opt/microchip/xc16/v1.25/
cp -Rp /opt/microchip/xc16/v1.25/* .
mkdir -p /embedded/raspbian/var/tmp/
cd /embedded/raspbian/var/tmp
hg clone http://hg.kewl.org/pub/pic30
cd pic30

wget http://ww1.microchip.com/downloads/en/DeviceDoc/v1.25.src.zip

Raspbian

apt-get install build-essential flex bison unzip zlib1g-dev
cd /var/tmp/pic30
./install
exit

NFS

cd /opt
cp -Rpa /embedded/raspbian/opt/pic30-tools .

Microchip archive