Ad-hoc support for the WASM backend #86
Draft
Conversation
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
for cross compilation (eg to WASM)
This isn't really WASI-specific; it should work for any platform that has `getentropy`.
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
This PR adds support for the GHC WASM backend in an ad-hoc fashion by relying on
getentropyfrom the C standard library (as this is available in wasi-libc). There is nothing fundamentally WASM/WASI-specific about this; it works just as well on e.g. stock Linux.Additionally, we need to change the
build-typetoSimple, see #42.This is a draft PR only as skipping the custom setup is probably a non-starter.
A potentially more principled but invasive alternative would be to put the contents of this package in a separate
entropy-custom-setup, switchentropyto havebuild-type: Simple, have an opt-in flaguse-getentropythat, when enabled, uses the code added in this PR (apart fromhardwareRandom), and when disabled, defers toentropy-custom-setup.