我创建了两个模块(共享对象)cpu和SaveState作为模拟器的一部分.两者都独立编译成.so文件,并在运行时通过Lua脚本使用require()加载;即:
SaveState = require("SaveState") cpu = require("cpu")
int cpu::save_state(SaveState *state) { state->begin_section(savestate_namespace,savestate_data_size); state->write16(this->reg.af); state->write16(this->reg.bc); state->write16(this->reg.de); state->write16(this->reg.hl); state->write16(this->reg.sp); state->write16(this->reg.pc); state->write8 (this->interrupts_enabled); state->write8 (this->irq_flags); state->write8 (this->ie_flags); state->write8 (this->halted); state->write8 (this->halt_bug); state->write8 (this->extra_cycles); state->write64(this->total_cycles); state->write64(this->idle_cycles); return SaveState::OK; }
它编译得很好,但require(“cpu”)行失败:
lua5.1: error loading module 'cpu' from file './src/cpu/build/cpu.so': ./src/cpu/build/cpu.so: undefined symbol: _ZN9SaveState7write64Ey
使用nm -D我可以在savestate.so中看到确切的符号,但在运行时它不会出于某种原因.