Emscripten

[TurkeyMan]

Hey people, I was trying to use Emscripten with LDC. I didn't get very far.
As far as I can tell, Emscripten appears to be an officially supported platform in LLVM these days, so I figured there was good chance that it would 'just work'... but not so lucky.

I tried to supply -mtriple=asmjs-unknown-emscripten, which as far as I can tell is the way to inform LLVM that my target shall be Emscripten, but it fails with:
Error: unable to get target for 'asmjs-unknown-emscripten', see -version and -mtriple.
Any ideas?
Tried this before?

On an unrelated side note, how is that that when I run Clang on a .d file, it somehow invokes LDC?
> clang test.d -> doesn't complain about d source code, then errors about OPTLINK, which is not what I was expecting (I initially invoked Clang by accident). There's no Clang exe in the LDC distribution (Windows)... so I can't imagine where that logic comes from?

[dnadlinger]

As far as I can tell, Emscripten appears to be an officially supported platform in LLVM these days

I haven't been following Emscripten in quite a while, so I'm not sure about its status. However, judging from the below results from LLVM trunk, it doesn't seem to be supported in the way you think at all:

$ fgrep -riI asmjs include
$ fgrep -riI emscripten include
include/llvm/ADT/Triple.h:    le32,       // le32: generic little-endian 32-bit CPU (PNaCl / Emscripten)
include/llvm/ADT/Triple.h:    le64,       // le64: generic little-endian 64-bit CPU (PNaCl / Emscripten)

On an unrelated side note, how is that that when I run Clang on a .d file, it somehow invokes LDC?

It does not.

clang test.d

My guess is that Clang interprets it as a linker script. At least that's what it seems to do on Linux, albeit with a warning.

OPTLINK

LDC doesn't use OPTLINK at all. Regarding your observation, Clang probably tries to invoke the Microsoft link.exe, but fails as your PATH is not set up correctly.

[TurkeyMan]

Bummer :(

I have another opportunity to get D into use in my company, but I need to be able to target at least Emscripten, ideally nacl too. Library is not important; -betterc would be a perfectly acceptable starting point. I'm happy to flesh out the runtime/phobos ports for those platforms as I go if there was a working compiler available.

[Trass3r]

So why not just compile llvm yourself with the Emscripten backend included?

[TurkeyMan]

Because I have no idea what I'm doing, and I don't have any free time to learn :(
I'd be stretching my work time budget as it is.

[yannick]

close? see
#2144

[kinke]

Yeah, superseded by WebAssembly.