I guess it is a libusb build issue. Try to build and run any of the libusb
samples.
2010/5/6 Mike Lawrence <mike.lawre...@dal.ca>
> See below for the debug trace. Looks like it finds libusb-1.0, but
> claims that it was built using the wrong architecture. When installing
> libusb-1.0, I downloaded the source then ran
> ./configure;make;sudo make install
> as usuall, and didn't see any significant errors. Below the pyusb
> debug trace, I'll paste the log produced when I install libusb-1.0...
>
> ########
> # PyUSB debug trace
> ########
> 2010-05-06 08:13:16,588 ERROR:usb.backend.libusb10:Error loading
> libusb 1.0 backend
> Traceback (most recent call last):
> File
> "/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages/usb/backend/libusb10.py",
> line 588, in get_backend
> _lib = _load_library()
> File
> "/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages/usb/backend/libusb10.py",
> line 165, in _load_library
> l = CDLL(libname)
> File
> "/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/ctypes/__init__.py",
> line 353, in __init__
> self._handle = _dlopen(self._name, mode)
> OSError: dlopen(/usr/local/lib/libusb-1.0.dylib, 6): no suitable image
> found. Did find:
> /usr/local/lib/libusb-1.0.dylib: mach-o, but wrong architecture
> 2010-05-06 08:13:16,690 ERROR:usb.backend.openusb:Error loading OpenUSB
> backend
> Traceback (most recent call last):
> File
> "/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages/usb/backend/openusb.py",
> line 588, in get_backend
> _lib = _load_library()
> File
> "/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages/usb/backend/openusb.py",
> line 149, in _load_library
> raise OSError('USB library could not be found')
> OSError: USB library could not be found
> 2010-05-06 08:13:16,693 ERROR:usb.backend.libusb01:Error loading
> libusb 0.1 backend
> Traceback (most recent call last):
> File
> "/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages/usb/backend/libusb01.py",
> line 539, in get_backend
> _lib = _load_library()
> File
> "/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages/usb/backend/libusb01.py",
> line 180, in _load_library
> raise OSError('USB library could not be found')
> OSError: USB library could not be found
> Traceback (most recent call last):
> File "<stdin>", line 1, in <module>
> File
> "/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages/usb/legacy.py",
> line 326, in busses
> return (Bus(),)
> File
> "/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages/usb/legacy.py",
> line 322, in __init__
> self.devices = [Device(d) for d in core.find(find_all=True)]
> File
> "/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages/usb/core.py",
> line 819, in find
> raise ValueError('No backend available')
> ValueError: No backend available
>
>
> ########
> # libusb-1.0 install log
> ########
>
> mal:libusb-1.0.8 mike$ ./configure
> checking for a BSD-compatible install... /usr/bin/install -c
> checking whether build environment is sane... yes
> checking for a thread-safe mkdir -p... ./install-sh -c -d
> checking for gawk... no
> checking for mawk... no
> checking for nawk... no
> checking for awk... awk
> checking whether make sets $(MAKE)... yes
> checking for gcc... gcc
> checking whether the C compiler works... yes
> checking for C compiler default output file name... a.out
> checking for suffix of executables...
> checking whether we are cross compiling... no
> checking for suffix of object files... o
> checking whether we are using the GNU C compiler... yes
> checking whether gcc accepts -g... yes
> checking for gcc option to accept ISO C89... none needed
> checking for style of include used by make... GNU
> checking dependency style of gcc... gcc3
> checking build system type... i386-apple-darwin10.3.0
> checking host system type... i386-apple-darwin10.3.0
> checking for a sed that does not truncate output... /usr/bin/sed
> checking for grep that handles long lines and -e... /usr/bin/grep
> checking for egrep... /usr/bin/grep -E
> checking for fgrep... /usr/bin/grep -F
> checking for ld used by gcc...
> /usr/libexec/gcc/i686-apple-darwin10/4.2.1/ld
> checking if the linker (/usr/libexec/gcc/i686-apple-darwin10/4.2.1/ld)
> is GNU ld... no
> checking for BSD- or MS-compatible name lister (nm)... /usr/bin/nm
> checking the name lister (/usr/bin/nm) interface... BSD nm
> checking whether ln -s works... yes
> checking the maximum length of command line arguments... 196608
> checking whether the shell understands some XSI constructs... yes
> checking whether the shell understands "+="... yes
> checking for /usr/libexec/gcc/i686-apple-darwin10/4.2.1/ld option to
> reload object files... -r
> checking for objdump... no
> checking how to recognize dependent libraries... pass_all
> checking for ar... ar
> checking for strip... strip
> checking for ranlib... ranlib
> checking command to parse /usr/bin/nm output from gcc object... ok
> checking for dsymutil... dsymutil
> checking for nmedit... nmedit
> checking for lipo... lipo
> checking for otool... otool
> checking for otool64... no
> checking for -single_module linker flag... yes
> checking for -exported_symbols_list linker flag... yes
> checking how to run the C preprocessor... gcc -E
> checking for ANSI C header files... yes
> checking for sys/types.h... yes
> checking for sys/stat.h... yes
> checking for stdlib.h... yes
> checking for string.h... yes
> checking for memory.h... yes
> checking for strings.h... yes
> checking for inttypes.h... yes
> checking for stdint.h... yes
> checking for unistd.h... yes
> checking for dlfcn.h... yes
> checking for objdir... .libs
> checking if gcc supports -fno-rtti -fno-exceptions... no
> checking for gcc option to produce PIC... -fno-common -DPIC
> checking if gcc PIC flag -fno-common -DPIC works... yes
> checking if gcc static flag -static works... no
> checking if gcc supports -c -o file.o... yes
> checking if gcc supports -c -o file.o... (cached) yes
> checking whether the gcc linker
> (/usr/libexec/gcc/i686-apple-darwin10/4.2.1/ld) supports shared
> libraries... yes
> checking dynamic linker characteristics... darwin10.3.0 dyld
> checking how to hardcode library paths into programs... immediate
> checking whether stripping libraries is possible... yes
> checking if libtool supports shared libraries... yes
> checking whether to build shared libraries... yes
> checking whether to build static libraries... yes
> checking for inline... inline
> checking whether gcc and cc understand -c and -o together... yes
> checking operating system... Darwin/MacOS X
> checking sys/timerfd.h usability... no
> checking sys/timerfd.h presence... no
> checking for sys/timerfd.h... no
> checking whether TFD_NONBLOCK is declared... no
> checking whether to use timerfd for timing... no (header not available)
> configure: creating ./config.status
> config.status: creating libusb-1.0.pc
> config.status: creating Makefile
> config.status: creating libusb/Makefile
> config.status: creating examples/Makefile
> config.status: creating doc/Makefile
> config.status: creating doc/doxygen.cfg
> config.status: creating config.h
> config.status: executing depfiles commands
> config.status: executing libtool commands
>
>
> mal:libusb-1.0.8 mike$ make
> make all-recursive
> Making all in libusb
> CC libusb_1_0_la-core.lo
> CC libusb_1_0_la-descriptor.lo
> CC libusb_1_0_la-io.lo
> io.c:1674: warning: ‘handle_timeout’ defined but not used
> io.c:1688: warning: ‘handle_timeouts_locked’ defined but not used
> CC libusb_1_0_la-sync.lo
> CC libusb_1_0_la-darwin_usb.lo
> os/darwin_usb.c: In function ‘event_thread_main’:
> os/darwin_usb.c:286: warning: cast to pointer from integer of different
> size
> CCLD libusb-1.0.la
> Making all in doc
> make[2]: Nothing to be done for `all'.
> make[2]: Nothing to be done for `all-am'.
>
>
> mal:libusb-1.0.8 mike$ sudo make install
> Password:
> Making install in libusb
> test -z "/usr/local/lib" || .././install-sh -c -d "/usr/local/lib"
> /bin/sh ../libtool --mode=install /usr/bin/install -c
> libusb-1.0.la '/usr/local/lib'
> libtool: install: /usr/bin/install -c .libs/libusb-1.0.0.dylib
> /usr/local/lib/libusb-1.0.0.dylib
> libtool: install: (cd /usr/local/lib && { ln -s -f libusb-1.0.0.dylib
> libusb-1.0.dylib || { rm -f libusb-1.0.dylib && ln -s
> libusb-1.0.0.dylib libusb-1.0.dylib; }; })
> libtool: install: /usr/bin/install -c .libs/libusb-1.0.lai
> /usr/local/lib/libusb-1.0.la
> libtool: install: /usr/bin/install -c .libs/libusb-1.0.a
> /usr/local/lib/libusb-1.0.a
> libtool: install: chmod 644 /usr/local/lib/libusb-1.0.a
> libtool: install: ranlib /usr/local/lib/libusb-1.0.a
> ----------------------------------------------------------------------
> Libraries have been installed in:
> /usr/local/lib
>
> If you ever happen to want to link against installed libraries
> in a given directory, LIBDIR, you must either use libtool, and
> specify the full pathname of the library, or use the `-LLIBDIR'
> flag during linking and do at least one of the following:
> - add LIBDIR to the `DYLD_LIBRARY_PATH' environment variable
> during execution
>
> See any operating system documentation about shared libraries for
> more information, such as the ld(1) and ld.so(8) manual pages.
> ----------------------------------------------------------------------
> test -z "/usr/local/include/libusb-1.0" || .././install-sh -c -d
> "/usr/local/include/libusb-1.0"
> /usr/bin/install -c -m 644 libusb.h '/usr/local/include/libusb-1.0'
> Making install in doc
> make[2]: Nothing to be done for `install-exec-am'.
> make[2]: Nothing to be done for `install-data-am'.
> make[2]: Nothing to be done for `install-exec-am'.
> test -z "/usr/local/lib/pkgconfig" || ./install-sh -c -d
> "/usr/local/lib/pkgconfig"
> /usr/bin/install -c -m 644 libusb-1.0.pc '/usr/local/lib/pkgconfig'
>
>
> ------------------------------------------------------------------------------
> _______________________________________________
> pyusb-users mailing list
> pyusb-users@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/pyusb-users
>
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