Question about the Mechanism of Pressing Up Key to See History in GAP Emscripten Port

[wangyenshu]

Hello. If you press the up key in the GAP emscripten port, you will see the previous command history. But readline is not compiled to WebAssembly in the emscripten build.sh. I am curious about how it works.

On the other hand, I tried to compile ecl to WebAssembly but it does not support this mechanism.

[ChrisJefferson]

GAP has a built-in partial implementation of readline (that is slightly simplifying). Nowadays this usually isn't used as almost everyone has readline, I did wonder about removing it at some point -- it's useful we didn't!