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Fix user guide w.r.t. ghcjs cross bindist installs

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Installing a ghcjs bindist might require to install
a specific version of emscripten, and not the latest.
This commit is contained in:
David Binder 2024-04-24 02:02:17 +02:00
parent 682e0e94f7
commit 23c185e3e0
1 changed files with 10 additions and 5 deletions
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docs/guide.md
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@ -559,19 +559,24 @@ The next sections explain how to install each cross bindist.
### GHC JS cross bindists (experimental) ### GHC JS cross bindists (experimental)
You need the required emscripten JS toolchain: You need the required emscripten JS toolchain. GHC JS cross bindists might require you to install a specific
version of emscripten. If that is the case, then ghcup will display the required emscripten version in the
pre install message. You can use the following commands to install the emscripten toolchain on your system,
substituting the required version for the bindist that you want to install.
(Cf. [GHC-MR 10918](https://gitlab.haskell.org/ghc/ghc/-/merge_requests/10918))
```sh ```sh
git clone https://github.com/emscripten-core/emsdk.git git clone https://github.com/emscripten-core/emsdk.git
cd emsdk cd emsdk
./emsdk install latest ./emsdk install VERSION
./emsdk activate latest ./emsdk activate VERSION
source ./emsdk_env.sh source ./emsdk_env.sh
``` ```
Instructions are also here: [Download and install — Emscripten 3.1.43-git (dev) documentation](https://emscripten.org/docs/getting_started/downloads.html). Instructions are also here: [Download and install — Emscripten documentation](https://emscripten.org/docs/getting_started/downloads.html).
To install we need to invoke ghcup like so: To install you can either use the tui interface by invoking `emconfigure ghcup tui` or
you can install directly like so:
```sh ```sh
emconfigure ghcup install ghc --set javascript-unknown-ghcjs-9.6.2 emconfigure ghcup install ghc --set javascript-unknown-ghcjs-9.6.2