Emscripten: Memory init file generation is ignored in wasm backend

Created on 2 Mar 2020  路  3Comments  路  Source: emscripten-core/emscripten 
emcc tests\hello_world.c --memory-init-file 1 -s USE_PTHREADS=1 -s WASM=1 -o a.html

generated a file a.html.mem in asm.js backend, but does not generate the memory initializer file in wasm backend, the directive --memory-init-file 1 is getting silently ignored.

good first bug help wanted
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picture juj

Most helpful comment

Maybe we should print a warning about the unused option?

picture tlively on 2 Mar 2020
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All 3 comments

We should document this better, yeah. With wasm we never use a mem init file, as even with pthreads we have passive segments that let us embed them in the binary.

For wasm2js though we do obey that flag.

kripken picture kripken on 2 Mar 2020

Maybe we should print a warning about the unused option?

tlively picture tlively on 2 Mar 2020
👍2

Yes, docs + warning sounds good.

kripken picture kripken on 3 Mar 2020
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