[gambit-list] A Lisp that runs on Wasm?

Hendrik Boom hendrik at topoi.pooq.com
Sun Mar 19 21:04:08 EDT 2023


On Sat, Mar 18, 2023 at 12:15:21PM -0700, Winston W wrote:
> Hi Gambit List—
> 
> I'm searching for a way to write Lisp and have it run on a web browser as WASM, i.e. avoiding JS. I was hoping Gambit Scheme might be the key, by compiling Lisp —> (Gambit compiler) —> C —> (Clang) —> wasm. But I'm encountering problems. My current issue is the 'gambit.h' file checks for lots of things including `setjmp` which doesn't exist in WASM. Below is my test situation. Does anybody think this endeavor of compiling Gambit -> wasm can work? Or are there any other ways to write Lisp and execute it as Wasm?

One problem with cheme in WasM is proper tail-recusrion.  It is intended to be implemented in WASM, but it isn't in the standard because not enough implementations have implemented itm though at lest one has.

-- hendrik

> 
> ---
> 
> ```
> ;; fib.scm
> (define (square x)
>   (expt x 2))
> ```
> 
> ```
> % gsc -c fib
> ```
> 
> produces a fib.c file. Then:
> 
> ```
> % clang --target=wasm32 -O1 -Wno-deprecated-declarations -Wno-unused -Wno-write-strings -Wdisabled-optimization -fwrapv -fno-strict-aliasing -fno-math-errno -fomit-frame-pointer -fPIC -fno-common -D___SINGLE_HOST -D___DONT_HAVE_MATH_H -D___DONT_HAVE_SETJMP_H -D___DONT_HAVE_SIGNAL_H -D___DONT_HAVE_WCHAR_H -I"/opt/homebrew/Cellar/gambit-scheme/4.9.3_2/v4.9.3/include"  fib.c
> ```
> 
> Gives this error:
> ```
> In file included from fib.c:36:
> /opt/homebrew/Cellar/gambit-scheme/4.9.3_2/v4.9.3/include/gambit.h:8012:5: error: unknown type name 'jmp_buf'
>     jmp_buf buf;
>     ^
> 1 error generated.
> make: *** [fib.o] Error 1
> ```
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