[Libusb-devel] dynamically toggable debug logging option

[Pete B. <pb...@gm...>]

All,

With people starting to use the Windows binary releases, I'd like to 
produce libusb binaries that have the debug information available 
(usbi_dbg) but where debug output is only produced when requested (eg, 
through a debug option in xusb), preferably through a general call to 
libusb_set_debug().

The problem:

- With ENABLE_DEBUG_LOGGING on in config.h, usbi_dbg() prints debug info 
always, and it is not possible to turn the debug messages off.

- With ENABLE_DEBUG_LOGGING off, libusbi.h defines usbi_dbg() to an 
empty call, and therefore it is not possible to get debug info ever.

To address that issue, I have added a --enabled-toggable-debug option to 
configure, as well as the required modifications to core, in r243.

You can review the changes at:
http://git.libusb.org/?p=libusb-pbatard.git;a=commitdiff;h=a7a96927a30094f308ad00bf2af4532e765c05e0

This allows the possibility of enabling debugging messages on the fly in 
libusb apps.

Regards,

/Pete