It's getting closer. First, the --compile=all and --dump-bitcode=yes
options to Julia are a big help in dumping LLVM bitcodes. The
contrib/build_sysimg.jl code is useful for this after modifying it to
include these Julia command-line options.
There are a few issues with using Emscripten with Julia code:
* 32-bit code -- Emscripten expects 32-bit bitcode. On a 64-bit platform,
Julia generates 64-bit bitcode. I tried using the build_sysimg.jl script
with a target of i686, but Emscripten still gave me errors.
* struct error -- See this bug:
https://code.google.com/p/nativeclient/issues/detail?id=3932
* Symbol naming -- Code generated by Julia has a lot of symbols like #sym
that Emscripten doesn't like. This can be handled by either Emscripten or
on the Julia side.
Lastly, libjulia bitcode needs to be generated. I've gotten about 80% of it
to compile after stripping out the libuv stuff. There are also libraries
like BLAS, but these can be added as needed.
On Thu, Dec 18, 2014 at 2:48 PM, Páll Haraldsson pall.haralds...@gmail.com
wrote:
On Thursday, December 18, 2014 10:59:53 AM UTC, Jerzy Głowacki wrote:
I suppose Julia would be the successor to JavaScript if it was converted
by Emscripten and run by asm.js. But for now there seems to be an
Enscripten bug which invalidates Julia IR code.
Hi,
Curious, what bug is that? You have a bug number or know what it relates
to (on Emscripten side)? Invalidates Julia IR code? Intermediate
Representation? Does the bug only affect Julia? Have anything to do with
JavaScript ints (that it their non-existence, JS uses doubles as int)?
Did you really mean to say Julia would be the successor or Julia could
be a successor?
Is there any obvious successor or fairly much used alternative
currently? I've heard about Coffeescript, Typescript and Dart etc.
languages made to compile to JavaScript. And Scala.js. Scala was meant to
run in JVM and Scala.js has slightly different semantics because if JS's
ints. I wandered if Julia could do the same.
I assume you are talking about compile Julia the language/environment to
JavaScript and run the the REPL in a browser?
Should it be easier to compile Julia code to C (possible now) and that C
code via Emscripten to JavaScript? Emscripten says they handle portable C
code. Doesn't Intel's Julia2C claim portable C? I don't really see how
Emscripten handles ints. There is no requirement that C's ints are less
than 64 bit? Do not even have to be two's compliment, right? I fail to see
how they densely pack ints (that are 64-bit doubles) into 32-bit in
arrays..
PS. I dreamt my first dream in Julia code tonight. Might be a sign it's
the language for me.. :) Reminds me: Dreaming in code is a good book on
(Python and) Chandler (and e.g. Kapor/Mozilla)..
PS2. Is there an alternative gateway to the forums. I just hate using the
web(browser it's slow). Google Groups used to be for Usenet, but not this
forum..
