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$ EMCC_FAST_COMPILER=1 ~/develop/opensource/webruby/modules/emscripten/emcc vatest.c
Warning: Variable __init_array_start not referenced
Warning: Variable __init_array_end not referenced
Warning: Variable __fini_array_start not referenced
Warning: Variable __fini_array_end not referenced
false && "Unsupported type"
/Users/rafael/develop/opensource/emscripten-fastcomp/lib/Target/JSBackend/JSBackend.cpp : 683
LLVM ERROR: fail
Traceback (most recent call last):
  File "/Users/rafael/develop/opensource/webruby/modules/emscripten/emscripten.py", line 1347, in <module>

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# Suppose the currenct directory is ~/develop

$ git clone https://github.com/redis/hiredis
$ cd hiredis

# Set emscripten compiling target
$ export EMCC_LLVM_TARGET=i386-pc-linux-gnu

# Locale the installation path of webruby, for example, on my mac this is:
# ~/.gem/ruby/2.0.0/gems/webruby-0.2.4/

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$ git co CABLES-68-dev
(coding...)
$ git fetch
$ git rebase origin/CABLES-68
(fix merging...)
$ git co CABLES-68 && git rebase CABLES-68-dev
$ git push origin CABLES-68

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$ EMCC_LLVM_TARGET=i386-pc-linux-gnu EMCC_DEBUG=1 /Users/rafael/develop/webruby/modules/emscripten/emcc /Users/rafael/develop/webruby/build/mrbtest.bc -o /Users/rafael/develop/webruby/build/mrbtest.js -s TOTAL_MEMORY=33554432 --js-library /Users/rafael/develop/webruby/build/gem_test_library.js --pre-js /Users/rafael/develop/webruby/build/gem_test_append.js -s EXPORTED_FUNCTIONS="['_mruby_js_argument_type', '_mruby_js_convert_symbol_to_string', '_mruby_js_get_array_handle', '_mruby_js_get_float', '_mruby_js_get_hash_handle', '_mruby_js_get_integer', '_mruby_js_get_object_handle', '_mruby_js_get_proc', '_mruby_js_get_string_len', '_mruby_js_get_string_ptr', '_mruby_js_invoke_alloc_argv', '_mruby_js_invoke_fetch_argp', '_mruby_js_invoke_proc', '_mruby_js_invoke_release_argv', '_mruby_js_name_error', '_mruby_js_set_array_handle', '_mruby_js_set_boolean', '_mruby_js_set_float', '_mruby_js_set_function_handle', '_mruby_js_set_integer', '_mruby_js_set_nil', '_mruby_js_set_object_handle', '_mruby_js_set_string', '_ma

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/**
 * A simple theme for reveal.js presentations, similar
 * to the default theme. The accent color is darkblue.
 *
 * This theme is Copyright (C) 2012 Owen Versteeg, https://github.com/StereotypicalApps. It is MIT licensed.
 * reveal.js is Copyright (C) 2011-2012 Hakim El Hattab, http://hakim.se; so is the theme - beige.css - that this is based off of.
 */


// Default mixins and settings -----------------

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$ clang vatest.c
$ ./a.out
Type is 0
Value is 5
Type is 1
Value is 12
Type is 2
Value is 19
Type is 3
Value is 26

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       Entering: _mrb_run: 104,5521416,5666064,1484
Calling setjmp in run curr: 0x400, prev: (nil)!
         Entering: _stack_extend: 5521416,5,5
          Exiting: _stack_extend
         Entering: _mrb_realloc: 5521416,0,44
           Entering: _allocf: 5521416,0,44,0
             Entering: _realloc: 0,44
               Entering: _malloc: 44
                Exiting: _malloc
              Exiting: _realloc

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// The original JS code for WebGL geometries example in three.js repository
// I only changed the order of the functions for better comparison
// with the Ruby version.
// You can still find the original version inline at http://mrdoob.github.com/three.js/examples/webgl_geometries.html

var container, stats;
var camera, scene, renderer;

if ( ! Detector.webgl ) Detector.addGetWebGLMessage();

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$ clang swap64.c
$ ./a.out
72057594037927936

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#include <stdio.h>

#include <emscripten/emscripten.h>

int EMSCRIPTEN_KEEPALIVE c_func_calling_from_js() {
  printf("This is a c function calling from js!");

  return 0;
}