Building issue / undefined reference to libusb

[joppez]

When I tried to build ttwatch, I get the following errors after the 'make' command. It shows undefined reference to libusb. The cmake . command works and gives no errors. Is there any solution to this? I'm try to install it on a Raspberry Pi 3b+.

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pi@raspberrypi:~/ttwatch $ make [ 34%] Built target libttbin [ 34%] Built target libttwatch [ 34%] Linking CXX executable ttwatchd /usr/bin/ld: CMakeFiles/ttwatchd.dir/src/ttwatchd.c.o: in function register_callback': /home/pi/ttwatch/src/ttwatchd.c:178: undefined reference tolibusb_hotplug_register_callback' /usr/bin/ld: CMakeFiles/ttwatchd.dir/src/ttwatchd.c.o: in function main': /home/pi/ttwatch/src/ttwatchd.c:353: undefined reference tolibusb_init' /usr/bin/ld: /home/pi/ttwatch/src/ttwatchd.c:356: undefined reference to libusb_has_capability' /usr/bin/ld: /home/pi/ttwatch/src/ttwatchd.c:359: undefined reference tolibusb_exit' /usr/bin/ld: /home/pi/ttwatch/src/ttwatchd.c:368: undefined reference to libusb_exit' /usr/bin/ld: /home/pi/ttwatch/src/ttwatchd.c:377: undefined reference tolibusb_handle_events_completed' /usr/bin/ld: libttwatch.a(libttwatch.cpp.o): in function send_packet(TTWATCH*, unsigned char, unsigned char, unsigned char const*, unsigned char, unsigned char*)': /home/pi/ttwatch/src/libttwatch.cpp:245: undefined reference tolibusb_interrupt_transfer' /usr/bin/ld: /home/pi/ttwatch/src/libttwatch.cpp:256: undefined reference to libusb_interrupt_transfer' /usr/bin/ld: libttwatch.a(libttwatch.cpp.o): in functionttwatch_enumerate_devices': /home/pi/ttwatch/src/libttwatch.cpp:311: undefined reference to libusb_get_device_list' /usr/bin/ld: /home/pi/ttwatch/src/libttwatch.cpp:324: undefined reference tolibusb_free_device_list' /usr/bin/ld: libttwatch.a(libttwatch.cpp.o): in function ttwatch_open': /home/pi/ttwatch/src/libttwatch.cpp:332: undefined reference tolibusb_get_device_list' /usr/bin/ld: /home/pi/ttwatch/src/libttwatch.cpp:339: undefined reference to libusb_free_device_list' /usr/bin/ld: libttwatch.a(libttwatch.cpp.o): in functionttwatch_open_device': /home/pi/ttwatch/src/libttwatch.cpp:355: undefined reference to libusb_get_device_descriptor' /usr/bin/ld: /home/pi/ttwatch/src/libttwatch.cpp:368: undefined reference tolibusb_open' /usr/bin/ld: /home/pi/ttwatch/src/libttwatch.cpp:383: undefined reference to libusb_kernel_driver_active' /usr/bin/ld: /home/pi/ttwatch/src/libttwatch.cpp:385: undefined reference tolibusb_detach_kernel_driver' /usr/bin/ld: /home/pi/ttwatch/src/libttwatch.cpp:388: undefined reference to libusb_claim_interface' /usr/bin/ld: /home/pi/ttwatch/src/libttwatch.cpp:411: undefined reference tolibusb_get_string_descriptor_ascii' /usr/bin/ld: libttwatch.a(libttwatch.cpp.o): in function ttwatch_close': /home/pi/ttwatch/src/libttwatch.cpp:452: undefined reference tolibusb_release_interface' /usr/bin/ld: /home/pi/ttwatch/src/libttwatch.cpp:455: undefined reference to libusb_attach_kernel_driver' /usr/bin/ld: /home/pi/ttwatch/src/libttwatch.cpp:456: undefined reference tolibusb_close' /usr/bin/ld: libttwatch.a(libttwatch.cpp.o): in function ttwatch_get_serial_number': /home/pi/ttwatch/src/libttwatch.cpp:771: undefined reference tolibusb_get_device' /usr/bin/ld: /home/pi/ttwatch/src/libttwatch.cpp:771: undefined reference to libusb_get_device_descriptor' /usr/bin/ld: /home/pi/ttwatch/src/libttwatch.cpp:773: undefined reference tolibusb_get_string_descriptor_ascii' collect2: error: ld returned 1 exit status make[2]: [CMakeFiles/ttwatchd.dir/build.make:210: ttwatchd] Fout 1 make[1]: [CMakeFiles/Makefile2:116: CMakeFiles/ttwatchd.dir/all] Fout 2

[annkvth]

I have a similar (the same?) issue on Ubuntu 22.04. I have installed libusb libusb-1.0-0-dev from ubuntu repos. It is found by cmake, with the output -- Found libusb-1.0: -- - Includes: /usr/include/libusb-1.0 -- - Libraries: /usr/lib/x86_64-linux-gnu/libusb.so

However, make fails at "Linking CXX executable ttwatch /usr/bin/ld: CMakeFiles/ttwatch.dir/src/ttwatch.c.o: in function `main':" with undefined references to libusb_init , libusb_exit, libusb_get_device_list , and so on.

ETA: the exact make command at which it fails: /usr/bin/cmake -E cmake_link_script CMakeFiles/ttwatch.dir/link.txt --verbose=1 /usr/bin/c++ -g -rdynamic CMakeFiles/ttwatch.dir/src/ttwatch.c.o CMakeFiles/ttwatch.dir/src/options.c.o CMakeFiles/ttwatch.dir/src/json.c.o CMakeFiles/ttwatch.dir/src/download.c.o CMakeFiles/ttwatch.dir/src/firmware.c.o CMakeFiles/ttwatch.dir/src/misc.c.o CMakeFiles/ttwatch.dir/src/get_activities.c.o CMakeFiles/ttwatch.dir/src/update_gps.c.o CMakeFiles/ttwatch.dir/src/set_time.c.o -o ttwatch -L/usr/local/lib -Wl,-rpath,/usr/local/lib: libttwatch.a libttbin.a -lusb -lssl -lcrypto -lcurl -lprotobuf-c

[JaroslawJarmolowicz-TomTom]

I installed libusb-dev because it was not compiling. With bots libusb-dev and libusb-1.0-dev compiles and works fine.

[annkvth]

I installed libusb-dev because it was not compiling. With bots libusb-dev and libusb-1.0-dev compiles and works fine.

That did the trick for me too, thanks!