>>> Unpacking source...
>>> Unpacking usb_modeswitch-0.9.4.tar.bz2 to /var/tmp/portage/sys-apps/usb_modeswitch-0.9.4/work
>>> Source unpacked.
>>> Compiling source in /var/tmp/portage/sys-apps/usb_modeswitch-0.9.4/work/usb_modeswitch-0.9.4 ...
/var/tmp/portage/sys-apps/usb_modeswitch-0.9.4/temp/cccgQE6e.o: In function `search_devices':
usb_modeswitch.c:(.text+0x669): undefined reference to `usb_get_busses'
/var/tmp/portage/sys-apps/usb_modeswitch-0.9.4/temp/cccgQE6e.o: In function `release_usb_device':
usb_modeswitch.c:(.text+0x722): undefined reference to `usb_release_interface'
usb_modeswitch.c:(.text+0x740): undefined reference to `usb_close'
usb_modeswitch.c:(.text+0x7ca): undefined reference to `usb_close'
/var/tmp/portage/sys-apps/usb_modeswitch-0.9.4/temp/cccgQE6e.o: In function `read_bulk':
usb_modeswitch.c:(.text+0x81e): undefined reference to `usb_bulk_read'
/var/tmp/portage/sys-apps/usb_modeswitch-0.9.4/temp/cccgQE6e.o: In function `write_bulk':
usb_modeswitch.c:(.text+0x9ae): undefined reference to `usb_bulk_write'
/var/tmp/portage/sys-apps/usb_modeswitch-0.9.4/temp/cccgQE6e.o: In function `main':
usb_modeswitch.c:(.text+0x1144): undefined reference to `usb_init'
usb_modeswitch.c:(.text+0x1149): undefined reference to `usb_find_busses'
usb_modeswitch.c:(.text+0x1151): undefined reference to `usb_find_devices'
usb_modeswitch.c:(.text+0x12ba): undefined reference to `usb_open'
usb_modeswitch.c:(.text+0x131c): undefined reference to `usb_get_driver_np'
usb_modeswitch.c:(.text+0x137f): undefined reference to `usb_detach_kernel_driver_np'
usb_modeswitch.c:(.text+0x140a): undefined reference to `usb_control_msg'
usb_modeswitch.c:(.text+0x1439): undefined reference to `usb_close'
usb_modeswitch.c:(.text+0x1499): undefined reference to `usb_claim_interface'
usb_modeswitch.c:(.text+0x14b7): undefined reference to `usb_clear_halt'
usb_modeswitch.c:(.text+0x14ca): undefined reference to `usb_set_altinterface'
usb_modeswitch.c:(.text+0x15d0): undefined reference to `usb_release_interface'
collect2: ld returned 1 exit status
 * 
 * ERROR: sys-apps/usb_modeswitch-0.9.4 failed.
 * Call stack:
 *               ebuild.sh, line   49:  Called src_compile
 *             environment, line  801:  Called die
 * The specific snippet of code:
 *       $(tc-getCC) ${CFLAGS} ${LDFLAGS} -l usb -o usb_modeswitch usb_modeswitch.c || die 'failed to compile usb_modeswitch'
 *  The die message:
 *   failed to compile usb_modeswitch
 * 
 * If you need support, post the topmost build error, and the call stack if relevant.
 * A complete build log is located at '/var/log/portage/sys-apps/usb_modeswitch-0.9.4:20081123-095249.log'.
 * The ebuild environment file is located at '/var/tmp/portage/sys-apps/usb_modeswitch-0.9.4/temp/environment'.
 *