[Libusb-devel] How is libusb.h supposed to be used?

[Ludovic R. <lud...@gm...>]

Hello,

In my code I used:
#include <libusb-1.0/libusb.h>

But this failed (see [1] and [2]) on Debian kfreebsd because kfreebsd
use another implementation of libusb-1.0 API and the libusb.h file is
in /usr/include/ and not in /usr/include/libusb-1.0/ (see [3])

So my code code should use:
#include <libusb.h>

But then I am including libusb.h from libusb-0.1 present in /usr/include/

It looks like it is not possible to specify the libusb-1.0 header file when:
- libusb-0.1 is also installed
- your code should be portable to kfreebsd

One solution would to rename libusb-1.0/libusb.h in
libusb-1.0/libusb-1.0.h and indicate the API version in the header
file name (and not in the header file _path_).
But that would not work on kfreebsd unless they also rename their
header file to libusb-1.0.h.

Since libusb.h from libusb-0.1 and libusb.h from libusb-1.0 conficts
why not include libusb.h in /usr/include/ instead of
/usr/include/libusb-1.0/?

And:
$ pkg-config --cflags libusb-1.0
-I/usr/include/libusb-1.0

So application code should only use #include <libusb.h> for libusb-1.0
(without the directory name).

I looked at the sample codes in libusb/examples and they are using:
#include <libusb/libusb.h>
So can't be compiled (without modification) outside of libusb itself.

I have no solution right now.
But I have a problem.

Regards,

[1] http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=591782
[2] https://buildd.debian.org/fetch.cgi?pkg=ccid&arch=kfreebsd-i386&ver=1.4.0-1&stamp=1280932718&file=log&as=raw
[3] http://packages.debian.org/sid/kfreebsd-i386/libusb2-dev/filelist

-- 
 Dr. Ludovic Rousseau