For GNU/Linux
First prepare the dependencies: autotools，automake，sbcl …
git clone git@github.com:fricas/fricas.git
cd fricas
./build-setup.sh
./configure
make
sudo make install
For MacOS
First prepare the dependencies via homebrew: auotools, automake, sbcl, …
According to INSTALL, we have to build FriCAS out of the source tree.
git clone git@github.com:fricas/fricas.git
cd fricas
mkdir build-fricas && cd build-fricas
../build-setup.sh
../configure
make
make install
Finally
Happily use FriCAS in GNU TeXmacs.