Question

我在使用一组特定的驱动程序时遇到了很多麻烦，称为libnifalcon。

我很确定安装是成功的，但是当我尝试编译示例程序时，我得到错误：

mars@marslab:~/Documents/libnifalcon-1.0/examples/findfalcons$ g++ findfalcons.cpp 
/tmp/cc8TtfGn.o: In function `runFalconTest()':
findfalcons.cpp:(.text+0x6b): undefined reference to `libnifalcon::FalconDevice::FalconDevice()'
findfalcons.cpp:(.text+0xdd): undefined reference to `libnifalcon::FalconDevice::getDeviceCount(unsigned int&)'
findfalcons.cpp:(.text+0x1bd): undefined reference to `libnifalcon::FalconDevice::open(unsigned int)'
findfalcons.cpp:(.text+0x224): undefined reference to `libnifalcon::FalconDevice::isFirmwareLoaded()'
findfalcons.cpp:(.text+0x2ac): undefined reference to `libnifalcon::FalconFirmware::loadFirmware(bool, unsigned int const&, unsigned char*)'
findfalcons.cpp:(.text+0x33b): undefined reference to `libnifalcon::FalconDevice::isFirmwareLoaded()'
findfalcons.cpp:(.text+0x3dd): undefined reference to `libnifalcon::FalconDevice::runIOLoop(unsigned int)'
findfalcons.cpp:(.text+0x504): undefined reference to `libnifalcon::FalconDevice::runIOLoop(unsigned int)'
findfalcons.cpp:(.text+0x512): undefined reference to `libnifalcon::FalconDevice::close()'
findfalcons.cpp:(.text+0x52b): undefined reference to `libnifalcon::FalconDevice::~FalconDevice()'
findfalcons.cpp:(.text+0x53f): undefined reference to `libnifalcon::FalconDevice::~FalconDevice()'
/tmp/cc8TtfGn.o: In function `void libnifalcon::FalconDevice::setFalconFirmware<libnifalcon::FalconFirmwareNovintSDK>()':
findfalcons.cpp:(.text._ZN11libnifalcon12FalconDevice17setFalconFirmwareINS_23FalconFirmwareNovintSDKEEEvv[void libnifalcon::FalconDevice::setFalconFirmware<libnifalcon::FalconFirmwareNovintSDK>()]+0x1d): undefined reference to `libnifalcon::FalconFirmwareNovintSDK::FalconFirmwareNovintSDK()'
collect2: ld returned 1 exit status

如何验证库是否正确链接？如果不是，我该怎么办？

Answer 1

你没有与任何东西联系，即

g++ file.cpp

不会链接到标准库以外的任何库。您需要链接其他模块或库，可能是libnifalcon

g++ findfalcons.cpp -lnifalcon

或......你可能需要做类似

的事情

g++ -L/path/to/libnifalcon findfalcons.cpp -lnifalcon

其中-I告诉在哪里寻找库。

如何验证链接库？

1 个答案: