Hi,
More specifically, there is a problem with calls to libusb_cpu_to_le16(x)
in libusb.h
/** \def libusb_cpu_to_le16
* \ingroup misc
* Convert a 16-bit value from host-endian to little-endian format. On
* little endian systems, this function does nothing. On big endian systems,
* the bytes are swapped.
* \param x the host-endian value to convert
* \returns the value in little-endian byte order
*/
#define libusb_cpu_to_le16(x) ({ \
union { \
uint8_t b8[2]; \
uint16_t b16; \
} _tmp; \
uint16_t _tmp2 = (uint16_t)(x); \
_tmp.b8[1] = _tmp2 >> 8; \
_tmp.b8[0] = _tmp2 & 0xff; \
_tmp.b16; \
})
This is called 4 times at line number 886,887,888 and 936 in libusb.h. I just
commented it in the following code fragments , which allowed me to complete the
build:
static inline void libusb_fill_control_setup(unsigned char *buffer,
uint8_t bmRequestType, uint8_t bRequest, uint16_t wValue, uint16_t
wIndex,
uint16_t wLength)
{
struct libusb_control_setup *setup = (struct libusb_control_setup *)
buffer;
setup->bmRequestType = bmRequestType;
setup->bRequest = bRequest;
// setup->wValue = libusb_cpu_to_le16(wValue);
// setup->wIndex = libusb_cpu_to_le16(wIndex);
// setup->wLength = libusb_cpu_to_le16(wLength);
}
static inline void libusb_fill_control_transfer(
struct libusb_transfer *transfer, libusb_device_handle *dev_handle,
unsigned char *buffer, libusb_transfer_cb_fn callback, void *user_data,
unsigned int timeout)
{
struct libusb_control_setup *setup = (struct libusb_control_setup *)
buffer;
transfer->dev_handle = dev_handle;
transfer->endpoint = 0;
transfer->type = LIBUSB_TRANSFER_TYPE_CONTROL;
transfer->timeout = timeout;
transfer->buffer = buffer;
if (setup) {
// transfer->length = LIBUSB_CONTROL_SETUP_SIZE
// + libusb_le16_to_cpu(setup->wLength);
}
transfer->user_data = user_data;
transfer->callback = callback;
}
The gcc compiler version is the default one supplied with the latest version of
xcode (3.2.3)
i686-apple-darwin10-gcc-4.2.1:
Best regards,
Elvis
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