[libusb] Problems compiling with libusb.h

[tuxd3v <tu...@sa...>]

I guys,
I don't know if this is the right place, but after hours trying to 
figure out what's wrong, its the last chance.

I am trying to use libusb1.0 on my machine(Debian 7 amd64).

code usb.c file:

#include <stdio.h>
#include <libusb.h>

void printdev( libusb_device *dev ); //prototype of the function

void printdev( libusb_device *dev ){
     libusb_device_descriptor desc;
     int r = libusb_get_device_descriptor( dev, &desc );
     if ( r < 0 ) {
         printf( "failed to get device descriptor\n" );
         return 1;
     }
     printf( "Number of possible configurations: %d ", 
(int)desc.bNumConfigurations );
     printf( "Device Class: %d ", (int)desc.bDeviceClass );
     printf( "VendorID: %d ", desc.idVendor );
     printf( "ProductID: %d \n", desc.idProduct );
     libusb_config_descriptor *config;
     libusb_get_config_descriptor( dev, 0, &config );
     printf( "Interfaces: %d ||| ", (int)config->bNumInterfaces );
     const libusb_interface *inter;
     const libusb_interface_descriptor *interdesc;
     const libusb_endpoint_descriptor *epdesc;
     for( int i = 0; i < (int)config->bNumInterfaces; i++ ) {
         inter = &config->interface[i];
         printf( "Number of alternate settings: %d | ", 
inter->num_altsetting );
         for( int j = 0; j < inter->num_altsetting; j++ ) {
             interdesc = &inter->altsetting[ j ];
             printf( "Interface Number: %d | ", 
(int)interdesc->bInterfaceNumber );
             printf( "Number of endpoints: %d | ", 
(int)interdesc->bNumEndpoints );
             for( int k = 0; k < (int)interdesc->bNumEndpoints; k++ ){
                 epdesc = &interdesc->endpoint[ k ];
                 printf( "Descriptor Type: %d | "), 
(int)epdesc->bDescriptorType;
                 printf( "EP Address: %d | ", 
(int)epdesc->bEndpointAddress );
             }
         }
     }
     printf( "\n\n\n" );
     libusb_free_config_descriptor( config );
}

int main( int argc, char *argv[] ) {
     libusb_device **devs; //pointer to pointer of device, used to 
retrieve a list of devices
     libusb_context *ctx = NULL; //a libusb session
     int r; //for return values
     ssize_t cnt; //holding number of devices in list
     ssize_t i; //for iterating through the list

     r = libusb_init( &ctx ); //initialize a library session
     if(r < 0) {
         printf( "Init Error %d", r ); //there was an error
         return 1;
     }
     libusb_set_debug( ctx, 3 ); //set verbosity level to 3, as 
suggested in the documentation
     cnt = libusb_get_device_list( ctx, &devs ); //get the list of devices
     if( cnt < 0 ){
         printf( "Get Device Error" ); //there was an error
     }
     printf( " %d Devices in list.", cnt ); //print total number of usb 
devices

     for(i = 0; i < cnt ; i++) {
         printdev( devs[ i ] ); //print specs of this device
     }
     libusb_free_device_list( devs, 1 ); //free the list, unref the 
devices in it
     libusb_exit( ctx ); //close the session

     return 0;
}
---------------------------
`locate libusb.h`
/usr/include/libusb-1.0/libusb.h

static libary
/usr/lib/x86_64-linux-gnu/libusb-1.0.a

gcc -c usb.c -I/usr/include/libusb-1.0 -l
gcc -o -L/usr/lib/x86_64-linux-gnu -llibusb-1.0

I can't even compile to get the object file :S

in compilation process I get a:
"usb.c:10:2: error: unknown type name ‘libusb_device_descriptor’
   libusb_device_descriptor desc;
"
...
OK I get it...they are structs defenitions not typedef's..

But I think that to turn this lib easier, you should provide typedef's 
on linusb.h.

Thanks
tux