OS: Windows 10 x64
I. install
0. pre install
1. down
git clone https://github.com/emscripten-core/emsdk.git
注意：最新版本信息请查看“emscripten-tags.txt”
(1) lkgr.json
https://storage.googleapis.com/wasm-llvm/builds/linux/lkgr.json
to "emsdk\upstream"
(2) llvm
https://s3.amazonaws.com/mozilla-games/emscripten/packages/llvm/tag/win_64bit/emscripten-llvm-e1.38.30.zip
to "ëmsdk\zips"
2. setup
(1) custom install
emsdk install clang-e1.
(2) activate
emsdk activate --vs2013 clang-e1.
(3) test
emsdk_env
II. usage
1. compile BC file
emcc tests/hello_world.c
2. output
(1) normal
emcc tests/hello_world.c -o hello.html
(2) sdl
emcc tests/hello_world_sdl.cpp -o hello.html
(3) file
emcc tests/hello_world_file.cpp -o hello.html --preload-file tests/hello_world_file.txt
3. run
python -m SimpleHTTPServer
http://localhost:8080/hello.html
Src:
1. hello_world.c
/*
* Copyright 2011 The Emscripten Authors. All rights reserved.
* Emscripten is available under two separate licenses, the MIT license and the
* University of Illinois/NCSA Open Source License. Both these licenses can be
* found in the LICENSE file.
*/
#include <stdio.h>
int main() {
printf("hello, world!\n");
;
}
2. hello_world_sdl.cpp
// Copyright 2011 The Emscripten Authors. All rights reserved.
// Emscripten is available under two separate licenses, the MIT license and the
// University of Illinois/NCSA Open Source License. Both these licenses can be
// found in the LICENSE file.
#include <stdio.h>
#include <SDL/SDL.h>
#ifdef __EMSCRIPTEN__
#include <emscripten.h>
#endif
extern "C" int main(int argc, char** argv) {
printf("hello, world!\n");
SDL_Init(SDL_INIT_VIDEO);
SDL_Surface *screen = SDL_SetVideoMode(, , , SDL_SWSURFACE);
#ifdef TEST_SDL_LOCK_OPTS
EM_ASM("SDL.defaults.copyOnLock = false; SDL.defaults.discardOnLock = true; SDL.defaults.opaqueFrontBuffer = false;");
#endif
if (SDL_MUSTLOCK(screen)) SDL_LockSurface(screen);
; i < ; i++) {
; j < ; j++) {
#ifdef TEST_SDL_LOCK_OPTS
// Alpha behaves like in the browser, so write proper opaque pixels.
;
#else
// To emulate native behavior with blitting to screen, alpha component is ignored. Test that it is so by outputting
// data (and testing that it does get discarded)
;
#endif
*((Uint32*)screen->pixels + i * + j) = SDL_MapRGBA(screen->format, i, j, -i, alpha);
}
}
if (SDL_MUSTLOCK(screen)) SDL_UnlockSurface(screen);
SDL_Flip(screen);
printf("you should see a smoothly-colored square - no sharp lines but the square borders!\n");
printf("and here is some text that should be HTML-friendly: amp: |&| double-quote: |\"| quote: |'| less-than, greater-than, html-like tags: |<cheez></cheez>|\nanother line.\n");
SDL_Quit();
;
}
3. hello_world_file.cpp
// Copyright 2012 The Emscripten Authors. All rights reserved.
// Emscripten is available under two separate licenses, the MIT license and the
// University of Illinois/NCSA Open Source License. Both these licenses can be
// found in the LICENSE file.
#include <stdio.h>
int main() {
FILE *file = fopen("tests/hello_world_file.txt", "rb");
if (!file) {
printf("cannot open file\n");
;
}
while (!feof(file)) {
char c = fgetc(file);
if (c != EOF) {
putchar(c);
}
}
fclose (file);
;
}
hello_world_file.txt
== This data has been read from a file. The file is readable as if it were at the same location in the filesystem, including directories, as in the local filesystem where you compiled the source. ==