Questions tagged [emcc]
43 questions
11
votes
3 answers
Is there a way to use C++ in JavaScript?
From this, I found out that JavaScript is written in C++. I also have found out/deduced that a majority of JavaScript is C++ (e.g. Math.atan+"" and Math.atan.toString() yielding "function atan() { [native code] }"). The [native code I assume to be…
Conor O'Brien
- 987
- 2
- 16
- 40
4
votes
1 answer
WebAssembly LinkError: _sprintf function import requires a callable
Creating the WebAssembly.Instance in JS from a Emscripten compiled WASM which included a call to sprintf, results in this error:
Uncaught (in promise) LinkError: WebAssembly.Instance(): Import #1 module="env" function="_sprintf" error: function…
Terry
- 95
- 9
3
votes
1 answer
Bazel target compiles in gcc but fails in emscripten
I am building a system using Bazel where I have a C++ target and an emscirpten (emcc) target to compile to web assembly.
Both depend on "myAPI", which has external dependencies libpng, libz, opencv and some others.
This compiles properly:
#…
Harry R.
- 751
- 1
- 5
- 11
3
votes
1 answer
webassembly (C) How can I create configuration files?
I would like to create configuration for my webassembly app. It just needs to be able to store some key-value pairs: whether it's JSON, XML, .cfg, .csv or .txt any will do. Is it possible to do this with webassembly? Do I need to serve the config…
Neil
- 3,020
- 4
- 25
- 48
2
votes
1 answer
Unable to import compiled javascript file from Emscripten for WebAssembly (C++ wrriten) to React
Hi I've compiled the C++ file via emcc (emscripten frontends). The output I expected is one .wasm file and .js file to implement javascript.
I build React application which try to import WebAssembly via .js module like below. (./wasm/dist/my-module…
James Kanin Kearpimy
- 23
- 2
2
votes
1 answer
wasm-ld: error: initial memory too small, 18317952 bytes needed
I want to compile ffmpeg to wasm.After downloading FFMPEG and emsdk source code,I used command below to build.
emconfigure ./configure --cc="emcc" --enable-cross-compile --target-os=none --arch=x86_32 --cpu=generic \
--disable-ffplay…
mengzz
- 71
- 1
- 5
2
votes
1 answer
EM_JS can't export functions in emscripten
If I use the emscripten interface, EM_JS the symbols don't seem to be exported or anything.
If I use the following C code:
#include
#include
//Function in Javascript Land
extern void writeout( int o );
EM_JS(void,…
Charles Lohr
- 695
- 1
- 8
- 23
2
votes
0 answers
Has anyone tried to compile OpenBLAS to Webassembly using clang/emcc?
In the OpenBLAS root directory on a linux system, with emcc sdk already loaded by (in the emsdk directory, source ./emsdk_env.sh)
I was trying to use emcc to compile OpenBLAS by
make CC=emcc NOFORTRAN=1 HOSTCC=emcc BINARY=64 libs,
but it complained…
Chen
- 188
- 2
- 11
2
votes
2 answers
How to set gcc flags in Emscripten
I compile with the following command:
gcc -Wall -march=native -O3 -ffast-math -I/usr/local/include -I/usr/local/include -o waon main.o notes.o midi.o analyse.o fft.o hc.o snd.o -L/usr/local/lib -L/usr/local/lib -lfftw3 -L/usr/local/lib -lsndfile…
Bob van Luijt
- 7,153
- 12
- 58
- 101
1
vote
0 answers
missing when compiling emscripten
I tried compiling a game I made with glut using RakNet in C++. But whenever try to compile it for browser. I get this error:
lib/RakNet/Source/FileList.cpp:24:10: fatal error: 'sys/io.h' file not found
#include
^~~~~~~~~~
1 error…
bonii
- 71
- 1
- 9
1
vote
1 answer
EXPORTED_FUNCTIONS ignored during emcc compilation
I'm trying to learn how to compile CPP into WASM and I can't seem get it to work properly.
I have a simple CPP code that implements a squarer function which squares a given integer:
#ifdef __EMSCRIPTEN__
#include
#endif
int…
user92563
- 11
- 2
1
vote
1 answer
Why are the WASM files different?
I want to use WebAssembly, so i have to compile C file to WASM file.
The contents of the C file are as follows
//The online 'add.c'
WASM_EXPORT
int add(int a, int b)
{
return a + b;
}
It's a very simple C file.
This WASM file is compiled by…
Aves_LH
- 11
- 2
1
vote
1 answer
How to control where the canvas is placed in the document?
I have a C++ application with a UI that I converted to JS using emcc.
The UI of this application takes the form of a canvas on the web page and is appended to the body. How can I control where the canvas is appended?
What if I want the canvas to be…
Maxime Dupré
- 5,319
- 7
- 38
- 72
1
vote
1 answer
emcc won't run on Mac OSX 10.15, clang-10: error unknown argument: '-fignore-exceptions'
I have a simple hello.c file with the following contents:
#include
#include
#include
int main() {
printf("hello wasm\n");
}
I am trying to compile this into a .html with emscripten emcc command using:
emcc…
suraj
- 581
- 7
- 17
1
vote
2 answers
Why do I get "unsupported shader version" using "#version 300 es" at emscripten?
I don't know why I get a "unsupported shader version" error message using #version 300 es in my vertex shader with the latest emscripten 1.39. With #version 100 it works fine.
const GLchar* vertex_shader_code[] = {
"#version 300 es\n"
…
PowerNow
- 363
- 1
- 2
- 15