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Date: Wed, 11 Apr 2007 12:43:24 -0700
From: Brian Dessent <brian AT dessent DOT net>
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Subject: Re: 1.5.24-2: libusb-win32
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Maurits Kooiman wrote:

> I used your libusb-win32 (the testlibusb worked).
> mine linker couldn’t find the usb functions.
> 
> Do you have any idea where to look?
> 
> Regards
> Maurits Kooiman
> 
> Result of the make-file:
> 
> make -k all
> Building file: ../main.cpp
> Invoking: GCC C++ Compiler
> g++ -O3 -Wall -c -fmessage-length=0 -MMD -MP -MF"main.d" -MT"main.d"
> -o"main.o" "../main.cpp"
> Finished building: ../main.cpp
>  
> Building target: NXTinterface.exe
> Invoking: GCC C++ Linker
> g++  -o"NXTinterface.exe"  ./main.o
> ./main.o:main.cpp:(.text+0xe1): undefined reference to `_usb_init'
> ./main.o:main.cpp:(.text+0xe6): undefined reference to `_usb_find_busses'
> ./main.o:main.cpp:(.text+0xeb): undefined reference to `_usb_find_devices'
> ./main.o:main.cpp:(.text+0xf0): undefined reference to `_usb_get_busses'
> ./main.o:main.cpp:(.text+0xf5): undefined reference to `_usb_get_busses'
> collect2: ld returned 1 exit status

How do you expect this to ever work?  You're not telling to link against
the library.  It's not a mind reader, you need to give it -lusb.

Brian

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