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