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usbtest: Disable gcc9 -Waddress-of-packed-member 

Disable the -Wadress-of-packaed-member diagnostic for the
grub_usb_get_string function since the result is false postive. The
descstrp->str is found to be aligned in the buffer allocated for 'struct
grub_usb_desc_str'.

[  229s] ../../grub-core/commands/usbtest.c: In function 'grub_usb_get_string':
[  229s] ../../grub-core/commands/usbtest.c:104:58: error: taking address of packed member of 'struct grub_usb_desc_str' may result in an unaligned pointer value [-Werror=address-of-packed-member]
[  229s]   104 |   *grub_utf16_to_utf8 ((grub_uint8_t *) *string, descstrp->str,
[  229s]       |                                                  ~~~~~~~~^~~~~

Signed-off-by: Michael Chang <mchang@suse.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
This commit is contained in:
Michael Chang 2019-04-11 17:14:07 +08:00 committed by Daniel Kiper
parent 0b1bf3932f
commit 85e08e174e
1 changed files with 9 additions and 0 deletions
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9
grub-core/commands/usbtest.c
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@ -63,6 +63,11 @@ static const char *usb_devspeed[] =
"High"
};
#if __GNUC__ >= 9
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Waddress-of-packed-member"
#endif
static grub_usb_err_t
grub_usb_get_string (grub_usb_device_t dev, grub_uint8_t index, int langid,
char **string)
@ -108,6 +113,10 @@ grub_usb_get_string (grub_usb_device_t dev, grub_uint8_t index, int langid,
return GRUB_USB_ERR_NONE;
}
#if __GNUC__ >= 9
#pragma GCC diagnostic pop
#endif
static void
usb_print_str (const char *description, grub_usb_device_t dev, int idx)
{