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  • Introducing Emscripten
    • About Emscripten
      • Emscripten Toolchain
      • Porting code to use Emscripten
    • Community
      • Get in touch
      • Report a bug
      • Blogs
      • Contribute
    • Open Source License
    • Release Notes
      • ChangeLog
    • Talks and Publications
      • Presentations
      • Papers
      • Books
  • Getting Started
    • Download and install
      • SDK Downloads
        • Windows
        • Linux and Mac OS X
      • Installation instructions
        • Windows: Installing using an NSIS installer
        • Windows, OSX and Linux: Installing the Portable SDK
        • Platform-specific notes
      • Verifying the installation
      • Updating the SDK
      • Uninstalling the Emscripten SDK
      • Archived releases
    • Emscripten Tutorial
      • First things first
      • Verifying Emscripten
      • Running Emscripten
      • Generating HTML
      • Using files
      • Optimizing code
      • Emscripten Test Suite and Benchmarks
      • General tips and next steps
    • Emscripten Test Suite
      • Running the whole test suite
      • Running a specific test
      • Running a bunch of random tests
      • Core test modes
      • Non-core test modes
      • Benchmark tests
      • Common tests
      • Debugging test failures
    • Getting started using Emscripten from Visual Studio
      • Integrating Emscripten and Visual Studio
      • How to build a Visual Studio solution using Emscripten
      • How to launch a project in a web browser from Visual Studio
      • Specifying project compiler settings
      • Porting an existing solution file to use Emscripten
      • Creating a new Visual Studio solution for Emscripten
    • Bug Reporting
      • Fastcomp LLVM-Backend and Clang bugs
      • Site and documentation bugs
    • FAQ
      • How do I compile code?
      • Why do I get multiple errors building basic code and the tests?
      • I tried something: why doesn’t it work?
      • Do I need to change my build system to use Emscripten?
      • Why is code compilation slow?
      • Why does my code run slowly?
      • Why is my compiled code big?
      • Why does compiling code that works on another machine gives me errors?
      • How can I reduce startup time?
      • Why does my code fail to compile with an error message about inline assembly (or {"text":"asm"})?
      • Why does my HTML app hang?
      • How do I run an event loop?
      • Why doesn’t my SDL app work?
      • How do I link against system libraries like SDL, boost, etc.?
      • What are my options for audio playback?
      • How can my compiled program access files?
      • Why can’t my code access a file in the same directory?
      • How can I tell when the page is fully loaded and it is safe to call compiled functions?
      • Why do functions in my C/C++ source code vanish when I compile to JavaScript, and/or I get No functions to process?
      • Why is the File System API is not available when I build with closure?
      • Why does my code break and gives odd errors when using -O2 --closure 1?
      • Why do I get undefined is not a function or NAME is not a function?
      • Why do I get an odd python error complaining about libcxx.bc or libcxxabi.bc?
      • Why does running LLVM bitcode generated by emcc through lli break with errors about impure_ptr?
      • Why do I get a stack size error when optimizing: RangeError: Maximum call stack size exceeded or similar?
      • Why do I get error: cannot compile this aggregate va_arg expression yet and it says compiler frontend failed to generate LLVM bitcode, halting afterwards?
      • Why does building from source fail during linking (at 100%)?
      • Why do I get odd rounding errors when using float variables?
      • Why the weird name for the project?
  • Porting
    • Code Portability and Limitations
      • Portability Guidelines
        • Code that cannot be compiled
        • Code that compiles but might run slowly
      • API Limitations
        • Networking
        • File Systems
        • Application Main Loop
        • Other APIs
      • Function Pointer Issues
        • Asm pointer casts
      • Specific Browser Limitations
    • Emscripten Runtime Environment
      • Input/output
      • File Systems
      • Browser main loop
        • Implementing an asynchronous main loop in C/C++
      • Execution lifecycle
      • Emscripten memory representation
    • Connecting C++ and JavaScript
      • Interacting with code
        • Calling compiled C functions from JavaScript using ccall/cwrap
        • Call compiled C/C++ code “directly” from JavaScript
        • Calling JavaScript from C/C++
        • Implement a C API in JavaScript
        • Calling JavaScript functions as function pointers from C
        • Access memory from JavaScript
        • Affect execution behaviour
        • Environment variables
        • Binding C++ and JavaScript — WebIDL Binder and Embind
      • Embind
        • A quick example
        • Classes
        • Memory management
        • Value types
        • Advanced class concepts
        • Overloaded functions
        • Enums
        • Constants
        • Using val to transliterate JavaScript to C++
        • Built-in type conversions
        • Performance
      • WebIDL Binder
        • A quick example
        • Using C++ classes in JavaScript
        • Pointers, References, Value types (Ref and Value)
        • Const
        • Un-deletable classes (NoDelete)
        • Defining inner classes and classes inside namespaces (Prefix)
        • Operators
        • enums
        • Sub-classing C++ base classes in JavaScript (JSImplementation)
        • Pointers and comparisons
        • NULL
        • void*
        • WebIDL types
        • Test and example code
    • Files and File Systems
      • File System Overview
        • Emscripten file system runtime environment
        • Emscripten file system architecture
      • Packaging Files
        • Packaging using emcc
        • Packaging using the file packager tool
        • Changing the data file location
        • Valid Character Set
        • Monitoring file usage
        • Test code
      • Synchronous Virtual XHR Backed File System Usage
        • Test code
        • Instructions
    • Multimedia and Graphics
      • EGL Support in Emscripten
        • What EGL is not?
        • How to create a WebGL context using EGL?
        • Implementation status and notes
      • OpenGL support in Emscripten
        • WebGL-friendly subset of OpenGL
        • OpenGL ES 2.0 emulation
        • OpenGL emulation of older desktop and mobile versions
        • OpenGL extensions
        • Test code/examples
        • What if I need unsupported GL features?
    • Debugging
      • Debug information
      • Debug mode (EMCC_DEBUG)
      • Compiler settings
      • emcc verbose output
      • Manual print debugging
      • Disabling optimizations
      • Emscripten-specific issues
        • Memory Alignment Issues
        • Function Pointer Issues
        • Infinite loops
      • AutoDebugger
        • AutoDebugger Regression Workflow
      • Useful Links
      • Need help?
  • Optimizing Code
    • How to optimize code
    • Advanced compiler settings
    • Very large projects
      • Memory initialization
      • Trading off code size and performance
      • Code size
      • Outlining
      • Aggressive variable elimination
    • Other optimization issues
      • C++ exceptions
      • Memory Growth
      • Inlining
      • Viewing code optimization passes
    • Unsafe optimizations
    • Profiling
    • Troubleshooting poor performance
  • Compiling and Running Projects
    • Building Projects
      • Integrating with a build system
      • Building projects with optimizations
      • Building projects with debug information
      • Using libraries
      • Emscripten Ports
        • Adding more ports
      • Build system issues
        • Build system self-execution
        • Dynamic linking
        • Pseudo-Dynamic linking
        • Configure may run checks that appear to fail
      • Manually using emcc
      • Alternatives to emcc
      • Examples / test code
      • Troubleshooting
    • Running HTML files with emrun
      • Features
      • Quick how-to
      • Choosing the browser to run
      • Security implications
      • Controlling web server operation
      • Controlling log output
      • Cleaning up after the run
      • Running web pages in Firefox
      • Running web pages on an Android device
  • Building Emscripten from Source
    • Emscripten Toolchain Requirements
      • What you’ll need
        • Emscripten tools and dependencies
        • Compiler toolchain
      • Test which tools are installed
    • Building Emscripten from Source using the SDK
      • What you’ll need
      • Building Emscripten from the main repositories
      • Building Emscripten using your own fork
    • Manually Building Emscripten on Linux
      • What you’ll need
      • Installing required tools
      • Configuring Emscripten settings
      • Validating the environment
    • Manually Building Emscripten on Windows
      • What you’ll need
      • Installing required tools
      • Configuring Emscripten settings
      • Validating the environment
    • Manually Integrating Emscripten into Visual Studio 2010
      • Install the vs-tool plugin
      • Test the installation
      • Learn more
    • Manually Building Emscripten on Mac OS X
      • What you’ll need
      • Installing required tools
      • Configuring Emscripten settings
      • Validating the environment
    • LLVM Backend (“Fastcomp”)
      • Fastcomp overview
      • Getting Fastcomp
      • Original compiler core (deprecated)
        • Why did this change happen?
        • Are there downsides?
        • Features not present in Fastcomp
        • How to disable Fastcomp
      • FAQ
        • I see WARNING: Linking two modules of different target triples [..] 'asmjs-unknown-emscripten' and 'le32-unknown-nacl'..?
    • Manually building Fastcomp from source
      • What you’ll need
      • Building Fastcomp
        • Branches
        • Backend code structure
    • Configuring Emscripten Settings when Manually Building from Source
      • Creating the compiler configuration file
      • Locating the compiler configuration file (.emscripten)
      • Compiler configuration file-format
      • Editing the compiler configuration file
    • Verifying the Emscripten Development Environment
      • Testing the environment
        • Sanity tests
        • Build a basic example
        • Run the full test suite
      • Troubleshooting
        • Installing missing components
        • Other common problems
  • Contributing to Emscripten
    • Contributing
      • Getting started
      • Next steps
    • Developer’s Guide
      • Building Emscripten from source code
      • Repositories and branches of interest
      • Submitting patches
      • Code reviews
      • Compiler overview
      • Emscripten Test Suite
      • See also
    • AUTHORS
  • API Reference
    • emscripten.h
      • Inline assembly/JavaScript
        • Defines
      • Calling JavaScript From C/C++
        • Function pointer types for callbacks
        • Functions
      • Browser Execution Environment
        • Functions
      • Emscripten Asynchronous File System API
        • Typedefs
        • Functions
      • Emscripten Asynchronous IndexedDB API
      • Compiling
      • Worker API
        • Typedefs
        • Functions
      • Logging utilities
        • Defines
        • Functions
      • Socket event registration
        • Callback functions
        • Functions
      • Unaligned types
        • Typedefs
      • Emterpreter-Async functions
        • Sleeping
        • Network
        • IndexedDB
      • Asyncify functions
        • Typedefs
        • Functions
    • html5.h
      • How to use this API
        • Registration functions
        • Callback functions
        • Functions affected by web security
        • Test/Example code
      • General types
      • Function result values
      • Keys
        • Defines
        • Struct
        • Callback functions
        • Functions
      • Mouse
        • Defines
        • Struct
        • Callback functions
        • Functions
      • Wheel
        • Defines
        • Struct
        • Callback functions
        • Functions
      • UI
        • Defines
        • Struct
        • Callback functions
        • Functions
      • Focus
        • Defines
        • Struct
        • Callback functions
        • Functions
      • Device orientation
        • Defines
        • Struct
        • Callback functions
        • Functions
      • Device motion
        • Defines
        • Struct
        • Callback functions
        • Functions
      • Orientation
        • Defines
        • Struct
        • Callback functions
        • Functions
      • Fullscreen
        • Defines
        • Struct
        • Callback functions
        • Functions
      • Pointerlock
        • Defines
        • Struct
        • Callback functions
        • Functions
      • Visibility
        • Defines
        • Struct
        • Callback functions
        • Functions
      • Touch
        • Defines
        • Struct
        • Callback functions
        • Functions
      • Gamepad
        • Defines
        • Struct
        • Callback functions
        • Functions
      • Battery
        • Defines
        • Struct
        • Callback functions
        • Functions
      • Vibration
        • Functions
      • Page unload
        • Defines
        • Callback functions
        • Functions
      • WebGL context
        • Defines
        • Struct
        • Callback functions
        • Functions
      • CSS
        • Functions
    • preamble.js
      • Calling compiled C functions from JavaScript
      • Accessing memory
      • Conversion functions — strings, pointers and arrays
      • Run dependencies
      • Stack trace
      • Type accessors for the memory model
    • File System API
      • Persistent data
      • File systems
        • MEMFS
        • NODEFS
        • IDBFS
      • Devices
      • Setting up standard I/O devices
      • File system API
      • File types
      • Paths
    • Module object
      • Creating the Module object
      • Affecting execution
      • Other methods
    • val.h (under-construction)
    • bind.h (under-construction)
      • How to use this API
        • Defines
      • Policies
      • select_overload and select_const
      • Functions
      • Value tuples
      • Value structs
      • Smart pointers
      • Classes
      • Vectors
      • Maps
      • Enums
      • Constants
    • trace.h
      • Usage
        • Compiler Interaction
        • Initialization and Teardown
        • Contexts
        • Frames
        • Annotating Allocations
        • Overall Memory Usage
        • Logging Messages
        • Tasks
        • Reporting Errors
      • Running the Server
      • Design Notes
        • Client / Server Design
        • Data Batching
        • Do Not Perturb The Heap
      • Functions
    • Advanced APIs
      • settings.js
      • preamble.js
      • Module.Runtime
      • Advanced File System API
  • Tools Reference
    • Emscripten SDK (emsdk)
      • Command line syntax
        • Arguments
        • Tools and SDK targets
      • SDK concepts
      • Emscripten Compiler Configuration File (.emscripten)
      • “How to” guides
        • How do I just get the latest SDK?
        • How do I use emsdk?
        • How do I check which versions of the SDK and tools are installed?
        • How do I install a tool/SDK version?
        • How do I remove a tool or an SDK?
        • How do I check for updates to the Emscripten SDK?
        • How do I change the currently active SDK version?
        • How do I install and activate old Emscripten SDKs and tools?
        • How do I track the latest Emscripten development with the SDK?
        • How do I use my own Emscripten Github fork with the SDK?
    • Emscripten Compiler Frontend (emcc)
      • Command line syntax
        • Arguments
      • Environment variables
    • Emscripten Windows Command Prompt (emcmdprompt.bat)
      • Command line syntax
  • About this site
    • Searching the site
    • Reporting bugs
    • Contributing to the site
    • Building the site
      • Installing Sphinx
        • Ubuntu
      • Site builds
      • SDK Builds
      • Build version
    • Writing and updating articles
      • Style guide
      • How to link to a document or heading
      • Recommended section/heading markup
      • Working in markdown
    • Read the docs theme
    • Site license
Index
 
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