Adding yacc and texlive-full

[BaseMax]

Why yacc - See the error:

Why texlive-full - See the error:

cc @mtorpey

cc https://github.com/gap-packages/packagemanager README.md file

[BaseMax]

We discussed this issue with @mtorpey in the GAP 2025 development room.

[fingolfin]

Thank you for contributing!

However, yacc here is only "needed" for building a demo in the GMP subdirectory. But this demo is not needed for GAP, so there is no reason to require yacc for that. In fact most users also should not have to build the GMP bundled with GAP -- and the command you edited is among other things installing libgmp-dev. Once that has been done, the code with the error you encountered won't be reached.

Regarding texlive-full: this also is not required to build GAP. However, one does need it (or some other TeX distribution) in order to create the PDF version of the GAP manual. As such perhaps doc/README.md should mention the need for a TeX installation. (And perhaps README.md should point out that in order to build the manual one should look at doc/README.md. And perhaps so should section "9 The Documentation" of INSTALL.md)