Hi Philippe, > The "why?" isn't clearly described.
Although __builtin___clear_cache is used to flush the instruction cache for a specified memory region[1], this operation doesn't apply to wasm, as its memory isn't executable. Moreover, Emscripten does not support this builtin and fails to compile it with the following error. > fatal error: error in backend: llvm.clear_cache is not supported on wasm To resolve this, I've removed the call to __builtin___clear_cache. I'll update this patch to include an explicit "#elif" branch with an explanation, like the following: +#elif defined(EMSCRIPTEN) + +/* Wasm does not have an executable memory region. */ + Please let me know if I'm missing something or if there is a preferred way to handle this case. [1] https://gcc.gnu.org/onlinedocs/gcc-14.2.0/gcc/Other-Builtins.html#index-_005f_005fbuiltin_005f_005f_005fclear_005fcache
