I want to compile usb thermometer for my sunxi cortexa7 OrangePiZero. The sources I successfully compiled already on A5V11 mipsel device and also on raspberypi.
The problem I experience now is that libusb-0.1.so installed by package liubusb-compat seems to have some problem. Though it is accepted and opened by linker it does not provide symbols. I looked into the libusb.so (renamed libusb-0.1.so) and the names of functions are inside. But command "nm" or "objdump" does not show any symbol table, not for static not for dynamic symbols.
Here is a piece of log I experience:
All undefined references below are inside library visible by hexeditor but not visible by nm or objdump.
look at -lusb below:
root@OpenWrt:/tempSRC/temperv14# make
gcc -DUNIT_TEST -O2 -ggdb -pipe -ffunction-sections -fdata-sections -mfloat-abi=hard -o temperv14 temperv14.c -L/tempSRC/temperv14 -lusb -Wl,--verbose=99 -Wl,--gc-sections -Wl,-rpath-link,/tempSRC/temperv14
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attempt to open /tempSRC/temperv14/libusb.so succeeded
-lusb (/tempSRC/temperv14/libusb.so)
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/tmp/ccacBfFv.o: In function `usb_detach':
/tempSRC/temperv14/temperv14.c:94: undefined reference to `usb_detach_kernel_driver_np'
/tmp/ccacBfFv.o: In function `find_lvr_winusb':
/tempSRC/temperv14/temperv14.c:175: undefined reference to `usb_open'
/tempSRC/temperv14/temperv14.c:177: undefined reference to `usb_busses'
/tmp/ccacBfFv.o: In function `setup_libusb_access':
/tempSRC/temperv14/temperv14.c:120: undefined reference to `usb_set_debug'
/tempSRC/temperv14/temperv14.c:122: undefined reference to `usb_init'
/tempSRC/temperv14/temperv14.c:123: undefined reference to `usb_find_busses'
/tempSRC/temperv14/temperv14.c:124: undefined reference to `usb_find_devices'
/tempSRC/temperv14/temperv14.c:139: undefined reference to `usb_set_configuration'
/tempSRC/temperv14/temperv14.c:146: undefined reference to `usb_claim_interface'
/tempSRC/temperv14/temperv14.c:151: undefined reference to `usb_claim_interface'
/tmp/ccacBfFv.o: In function `ini_control_transfer':
/tempSRC/temperv14/temperv14.c:192: undefined reference to `usb_control_msg'
/tmp/ccacBfFv.o: In function `control_transfer':
/tempSRC/temperv14/temperv14.c:212: undefined reference to `usb_control_msg'
/tmp/ccacBfFv.o: In function `interrupt_read':
/tempSRC/temperv14/temperv14.c:254: undefined reference to `usb_interrupt_read'
/tmp/ccacBfFv.o: In function `interrupt_read_temperatura':
/tempSRC/temperv14/temperv14.c:273: undefined reference to `usb_interrupt_read'
/tmp/ccacBfFv.o: In function `main':
/tempSRC/temperv14/temperv14.c:450: undefined reference to `usb_release_interface'
/tempSRC/temperv14/temperv14.c:451: undefined reference to `usb_release_interface'
/tempSRC/temperv14/temperv14.c:453: undefined reference to `usb_close'
collect2: error: ld returned 1 exit status
make: *** [Makefile:6: temperv14] Error 1
root@OpenWrt:/tempSRC/temperv14#
