Thanks for the instructions.
sudo apt update
sudo apt install texlive-latex-extra
sudo apt install dvipdf
sudo apt install ghostscript
sudo apt install texinfo
git clone https://git.savannah.gnu.org/git/c-intro-and-ref.git
cd c-intro-and-ref
make c.pdf
makeinfo --html -v c.texi -o c.html --no-split