编译选项
emcc test.c --js-library pkg.js -o test.js
pkg.js
mergeInto(LibraryManager.library,{ js_add:function(a,b) { console.log("js_add"); return a+b; }, js_console_log_int:function(param){ console.log("js_console_log_in:"+param); } })
test.c
#ifndef EM_PORT_API # if defined(__EMSCRIPTEN__) # include <emscripten.h> # if defined(__cplusplus) # define EM_PORT_API(rettype) extern "C" rettype EMSCRIPTEN_KEEPALIVE # else # define EM_PORT_API(rettype) rettype EMSCRIPTEN_KEEPALIVE # endif # else # if defined(__cplusplus) # define EM_PORT_API(rettype) extern "C" rettype # else # define EM_PORT_API(rettype) rettype # endif # endif #endif #include<stdio.h> #include<emscripten.h> #include<stdlib.h> #include<string.h> EM_PORT_API(int) js_add(int a,int b); EM_PORT_API(void) js_console_log_int(int param); EM_PORT_API(void) print_the_answer(){ int i=js_add(21,21); js_console_log_int(i); } EM_PORT_API(char*) str_merge(char* str1,char* str2) { int str1_len = 0; int str2_len = 0; int size = 0; char *buf = NULL; if(str1) str1_len = strlen(str1); if(str2) str2_len = strlen(str2); size = str1_len+str2_len; buf = (char*)malloc(size); memset(buf,0,size); if(str1_len>0)strncpy(buf,str1,str1_len); if(str2_len>0)strncpy(buf+str1_len,str2,str2_len); return buf;//return merge result } EM_PORT_API(int) add(int a,int b) { return a+b; } int main(int argc,char** argv) { return add(1,2); }
<html> <head> <title>test page</title> </head> <body> <script > Module={} Module.onRuntimeInitialized=function(){ Module._print_the_answer(); } </script> <script src="test.js"></script> </body> </html>
emrun --no_browser --port 8000 test.html
