适用于iOS应用程序的Xcode 8.3.3中架构x86_64的未定义符号
我刚刚使用Swift for iOS在Xcode8.3.3中创建了一个新项目，并尝试导入外部库SwiftLibModbus
我已经移植了这个库来使用Swift 3(也就是说，我修复了所有的错误)。这个库正在使用另一个名为libmodbus的库，该库是用C编写的，在导入这个库时，我得到了一个Undefined symbols for architecture x86_64错误。
下面是完整的错误：
Undefined symbols for architecture x86_64:
"_modbus_free", referenced from:
__TFC23SomeProject_Wi_Fi_Connect14SwiftLibModbusD in SwiftLibModbus.o
"_modbus_strerror", referenced from:
__TFC23SomeProject_Wi_Fi_Connect14SwiftLibModbusP33_56F751289226F31D555D5DEEC0F0514F12buildNSErrorfT5errnoVs5Int32_CSo7NSError in SwiftLibModbus.o
"_modbus_write_registers", referenced from:
__TFFC23SomeProject_Wi_Fi_Connect14SwiftLibModbus23writeRegistersFromAndOnFT7addressVs5Int3211numberArrayCSo7NSArray7successFT_T_7failureFCSo7NSErrorT__T_U_FT_T_ in SwiftLibModbus.o
"_modbus_read_input_registers", referenced from:
__TFFC23SomeProject_Wi_Fi_Connect14SwiftLibModbus22readInputRegistersFromFT12startAddressVs5Int325countS1_7successFGSaPs9AnyObject__T_7failureFCSo7NSErrorT__T_U_FT_T_ in SwiftLibModbus.o
"_modbus_write_register", referenced from:
__TFFC23SomeProject_Wi_Fi_Connect14SwiftLibModbus13writeRegisterFT7addressVs5Int325valueS1_7successFT_T_7failureFCSo7NSErrorT__T_U_FT_T_ in SwiftLibModbus.o
"_modbus_write_bit", referenced from:
__TFFC23SomeProject_Wi_Fi_Connect14SwiftLibModbus8writeBitFT7addressVs5Int326statusSb7successFT_T_7failureFCSo7NSErrorT__T_U_FT_T_ in SwiftLibModbus.o
"_modbus_new_tcp", referenced from:
__TFC23SomeProject_Wi_Fi_Connect14SwiftLibModbus8setupTCPfT9ipAddressCSo8NSString4portVs5Int326deviceS2__Sb in SwiftLibModbus.o
"_modbus_set_error_recovery", referenced from:
__TFC23SomeProject_Wi_Fi_Connect14SwiftLibModbus8setupTCPfT9ipAddressCSo8NSString4portVs5Int326deviceS2__Sb in SwiftLibModbus.o
"_modbus_close", referenced from:
__TFC23SomeProject_Wi_Fi_Connect14SwiftLibModbus10disconnectfT_T_ in SwiftLibModbus.o
"_modbus_connect", referenced from:
__TFC23SomeProject_Wi_Fi_Connect14SwiftLibModbus16connectWithErrorfCSo7NSErrorSb in SwiftLibModbus.o
__TFFC23SomeProject_Wi_Fi_Connect14SwiftLibModbus7connectFT7successFT_T_7failureFCSo7NSErrorT__T_U_FT_T_ in SwiftLibModbus.o
"_modbus_read_registers", referenced from:
__TFFC23SomeProject_Wi_Fi_Connect14SwiftLibModbus17readRegistersFromFT12startAddressVs5Int325countS1_7successFGSaPs9AnyObject__T_7failureFCSo7NSErrorT__T_U_FT_T_ in SwiftLibModbus.o
"_modbus_read_input_bits", referenced from:
__TFFC23SomeProject_Wi_Fi_Connect14SwiftLibModbus17readInputBitsFromFT12startAddressVs5Int325countS1_7successFGSaPs9AnyObject__T_7failureFCSo7NSErrorT__T_U_FT_T_ in SwiftLibModbus.o
"_modbus_read_bits", referenced from:
__TFFC23SomeProject_Wi_Fi_Connect14SwiftLibModbus12readBitsFromFT12startAddressVs5Int325countS1_7successFGSaPs9AnyObject__T_7failureFCSo7NSErrorT__T_U_FT_T_ in SwiftLibModbus.o
"_modbus_set_slave", referenced from:
__TFC23SomeProject_Wi_Fi_Connect14SwiftLibModbus8setupTCPfT9ipAddressCSo8NSString4portVs5Int326deviceS2__Sb in SwiftLibModbus.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)有什么办法可以解决这个问题吗？这实际上是我找到的唯一可用于Modbus的库。
谢谢:)
回答 6
Stack Overflow用户
发布于 2017-09-07 21:02:05
嗯..。您是否使用"Copy items if needed“和"Create folder references”标记将文件拖放到文件夹中？
如果是这样的话，Xcode可能不理解它需要为该文件夹中的正确架构编译文件。只需将这一堆文件直接拖到Xcode中，就可以了。
Stack Overflow用户
发布于 2017-11-02 21:49:19
正如在其他地方指出的那样，我已经通过以下方式解决了这个问题：
通过name
- rebuilding
pod update
- cleaning
_File -> Workspace Settings -> Grey Arrow -> CMD + delete
- 从
<->target菜单
关闭并重新打开新的测试目标，重命名在pod中包含下划线(下划线)的我的项目和目标
Stack Overflow用户
发布于 2017-09-07 20:25:11
如果您只是将所有文件拖到XCode，它会为当前选择的架构构建C代码，您可能需要清理和构建项目，以便在更改目标(设备/模拟器)后获得针对正确架构的库编译
为了避免这种情况，应该使用外部脚本为所有需要的架构构建本机库，并将其合并到一个"fat“或”通用“库中。
https://stackoverflow.com/questions/46096095
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