发现安卓编译的时候会报multiple definition of ‘luaL_setfuncs’，cjson.c里面有这个函数的定义
#if !defined(LUA_VERSION_NUM) || LUA_VERSION_NUM < 502
/* Compatibility for Lua 5.1.
*
* luaL_setfuncs() is used to create a module table where the functions have
* json_config_t as their first upvalue. Code borrowed from Lua 5.2 source. */
void luaL_setfuncs (lua_State *l, const luaL_Reg *reg, int nup)
{
int i;
luaL_checkstack(l, nup, "too many upvalues");
for (; reg->name != NULL; reg++) { /* fill the table with given functions */
for (i = 0; i < nup; i++) /* copy upvalues to the top */
lua_pushvalue(l, -nup);
lua_pushcclosure(l, reg->func, nup); /* closure with those upvalues */
lua_setfield(l, -(nup + 2), reg->name);
}
lua_pop(l, nup); /* remove upvalues */
}
#endif
然后查看external/lua/luajit/prebuilt/android下面预编译的静态库能发现里面有内置实现了luaL_setfuncs这个函数，然而iOS，Mac，以及linux和win32的版本都是没有这个函数的