libusbk backend

[Xiaofan Chen]

Also xusb and the dll build failed.

1>------ Build started: Project: libusb-1.0 (dll), Configuration:
Release Win32 ------
1>Linking...
1>libusb-1.0.def : error LNK2001: unresolved external symbol libusb_get_portpath
1>libusb-1.0.def : error LNK2001: unresolved external symbol libusb_get_portpath
1>libusb-1.0.def : error LNK2001: unresolved external symbol libusb_get_portpath
1>libusb-1.0.def : error LNK2001: unresolved external symbol libusb_get_portpath
1>libusb-1.0.def : error LNK2001: unresolved external symbol libusb_get_portpath
1>libusb-1.0.def : error LNK2001: unresolved external symbol libusb_get_portpath
1>libusb-1.0.def : error LNK2001: unresolved external symbol libusb_get_portpath
1>libusb-1.0.def : error LNK2001: unresolved external symbol libusb_get_portpath
1>libusb-1.0.def : error LNK2001: unresolved external symbol libusb_get_portpath
1>libusb-1.0.def : error LNK2001: unresolved external symbol libusb_get_portpath
1>C:\work\libusbx\vitali\libusb\Win32\Release\dll\libusb-1.0.lib :
fatal error LNK1120: 10 unresolved externals
1>Build log was saved at
"file://C:\work\libusbx\vitali\libusb\Win32\Release\dll\libusb-1.0\BuildLog.htm"
1>libusb-1.0 (dll) - 11 error(s), 0 warning(s)
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========

1>------ Build started: Project: xusb, Configuration: Release Win32 ------
1>Compiling...
1>xusb.c
1>.\xusb.c(171) : warning C4013: 'libusb_strerror' undefined; assuming
extern returning int
1>.\xusb.c(557) : warning C4013: 'libusb_get_port_path' undefined;
assuming extern returning int
1>.\xusb.c(784) : warning C4013: 'libusb_getversion' undefined;
assuming extern returning int
1>.\xusb.c(784) : warning C4047: '=' : 'const libusb_version *'
differs in levels of indirection from 'int'
1>.\xusb.c(785) : error C2037: left of 'major' specifies undefined
struct/union 'libusb_version'
1>.\xusb.c(785) : error C2037: left of 'minor' specifies undefined
struct/union 'libusb_version'
1>.\xusb.c(785) : error C2037: left of 'micro' specifies undefined
struct/union 'libusb_version'
1>.\xusb.c(785) : error C2037: left of 'nano' specifies undefined
struct/union 'libusb_version'
1>Build log was saved at
"file://C:\work\libusbx\vitali\libusb\Win32\Release\examples\xusb\xusb.htm"
1>xusb - 4 error(s), 4 warning(s)
========== Build: 0 succeeded, 1 failed, 1 up-to-date, 0 skipped ==========



-- 
Xiaofan