[SOLVED] Undefined symbols for architecture x86_64 when building hidapi

rcari

This is a linker problem. My guess would be that your -mmacosx-version-min=10.5 is conflicting somehow with your requirement to build with the x86_64 architecture.

rcari

Oups, sorry... You are missing a link to the CoreFoundation framework!

LIBS += CoreFoundation

Hedge

Thank you. After adding it to the .pro file I get the error message:

g++ -headerpad_max_install_names -arch x86_64 -Xarch_x86_64 -mmacosx-version min=10.5 -o BigRedButton.app/Contents/MacOS/BigRedButton main.o hidapi-mac.o dream_cheeky.o dream_cheeky_big_red_button.o     CoreFoundation 
i686-apple-darwin11-llvm-g++-4.2: CoreFoundation: No such file or directory

XCode and all required frameworks are installed though.

rcari

I am not a big fan/user of qmake so... Would you try
LIBS += -framework CoreFoundation ?

Hedge

That one works but I get the same error as in the first post.

rcari

What version of Mac OS X are you running? Did you remove the minimum compatibility of 10.5?

Hedge

I am on 10.7.4 and don't know how to remove the 10.5 requirement. QtCreator adds it automatically.

rcari

Could you please paste back the exact error message you have now?

Hedge

I didn't notice that it changed. It is now:

g++ -headerpad_max_install_names -arch x86_64 -Xarch_x86_64 -mmacosx-version-min=10.5 -o BigRedButton.app/Contents/MacOS/BigRedButton main.o hidapi-mac.o dream_cheeky.o dream_cheeky_big_red_button.o     -framework CoreFoundation 
Undefined symbols for architecture x86_64:
  "_IOHIDDeviceClose", referenced from:
make: Leaving directory `/Users/ali/Documents/big_red_button/BigRedButton'
      _hid_close in hidapi-mac.o
  "_IOHIDDeviceGetProperty", referenced from:
      _get_int_property in hidapi-mac.o
      _get_string_property in hidapi-mac.o
      _get_string_property_utf8 in hidapi-mac.o
  "_IOHIDDeviceGetReport", referenced from:
      _hid_get_feature_report in hidapi-mac.o
  "_IOHIDDeviceOpen", referenced from:
      _hid_open_path in hidapi-mac.o
  "_IOHIDDeviceRegisterInputReportCallback", referenced from:
      _hid_open_path in hidapi-mac.o
      _hid_close in hidapi-mac.o
  "_IOHIDDeviceScheduleWithRunLoop", referenced from:
      _read_thread in hidapi-mac.o
      _hid_close in hidapi-mac.o
  "_IOHIDDeviceSetReport", referenced from:
      _set_report in hidapi-mac.o
  "_IOHIDDeviceUnscheduleFromRunLoop", referenced from:
      _hid_close in hidapi-mac.o
  "_IOHIDManagerClose", referenced from:
      _hid_exit in hidapi-mac.o
  "_IOHIDManagerCopyDevices", referenced from:
      _hid_enumerate in hidapi-mac.o
      _hid_open_path in hidapi-mac.o
  "_IOHIDManagerCreate", referenced from:
      _init_hid_manager in hidapi-mac.o
  "_IOHIDManagerRegisterDeviceRemovalCallback", referenced from:
      _hid_open_path in hidapi-mac.o
      _hid_close in hidapi-mac.o
  "_IOHIDManagerScheduleWithRunLoop", referenced from:
      _init_hid_manager in hidapi-mac.o
  "_IOHIDManagerSetDeviceMatching", referenced from:
      _init_hid_manager in hidapi-mac.o
ld: symbol(s) not found for architecture x86_64@

rcari

Alright, so just to give you a hint on how to solve those problems in the future...
Your missing symbols begin with IOHID. In Mac OS X all classes beginning with IO belong to the "I/O Kit":http://developer.apple.com/library/mac/#documentation/devicedrivers/conceptual/IOKitFundamentals/Introduction/Introduction.html.
Therefore, you can deduce that you are missing a link to the I/O Kit libraries or "framework".
Simply add this to your .pro file: LIBS += -framework IOKit

Hedge

Did that ten seconds ago and it finally compiles. Thanks for the help :)