Change the method to check libusb at configuring

[jerryyu]

libusb.pc is checked at configuring to ensure that the usb library exists. However, the file libusb.pc isn't shipped in Solaris. So it won't work on Solaris. It was modified to check if the function 'usb_open' is there or not. If 'usb_open' is found, we think the usb library exists. It will work in Solaris as well as in Linux.

[jerryyu]

patch for this bug

[hsattler]

Replying to jerryyu:

libusb.pc is checked at configuring to ensure that the usb library exists. However, the file libusb.pc isn't shipped in Solaris. So it won't work on Solaris. It was modified to check if the function 'usb_open' is there or not. If 'usb_open' is found, we think the usb library exists. It will work in Solaris as well as in Linux.

Neither is it present on Win32, still we want to use it on systems that provide it. It would be nice to use a solution like done in ticket #9 as it actually is possible to support both detection methods.

[jerryyu]

Replying to hsattler:

Replying to jerryyu:

libusb.pc is checked at configuring to ensure that the usb library exists. However, the file libusb.pc isn't shipped in Solaris. So it won't work on Solaris. It was modified to check if the function 'usb_open' is there or not. If 'usb_open' is found, we think the usb library exists. It will work in Solaris as well as in Linux.

Neither is it present on Win32, still we want to use it on systems that provide it. It would be nice to use a solution like done in ticket #9 as it actually is possible to support both detection methods.

Yeah, supporting both detection methods is ok for me. After "Ticket #9: 620_win32-usb.patch" is accepted into trunk, I'll re-write a patch for Solaris based on that patch.

[zany]

Jerry, can you re-check this on Solaris?