Hi Folks I am trying to reconnect with leaf. The uboot build still fails at the same place. How do you build uboot and what compiler version do you use
on 13.02.2014 12:02, Erich Titl wrote:
> Hi
>
> While compiling 5.x I am getting stuck at uboot
>
>>>>>>>>>>>
> part_efi.c: In function 'gpt_fill_pte':
> part_efi.c:433:38: error: iteration 32u invokes undefined behavior
> [-Werror=aggressive-loop-optimizations]
> (efi_char16_t)(partitions[i].name[k]);
> ^
> part_efi.c:431:3: note: containing loop
> for (k = 0; k < name_len; k++)
> ^
> cc1: all warnings being treated as errors
>>>>>>>>>>>>
>
> the gcc is from the actual toolchain
> i486-unknown-linux-uclibc-gcc (GCC) 4.8.2
>
> the code looks like
>>>>>>>>>>>>
> /* partition attributes */
> memset(&gpt_e[i].attributes, 0,
> sizeof(gpt_entry_attributes));
>
> /* partition name */
> name_len = sizeof(gpt_e[i].partition_name)
> / sizeof(efi_char16_t);
> for (k = 0; k < name_len; k++)
> gpt_e[i].partition_name[k] =
> (efi_char16_t)(partitions[i].name[k]);
>>>>>>>>>>>>>
>
> I suspect the name_len to be the culprit, because
>>>>>>
> name_len = sizeof(gpt_e[i].partition_name)
> / sizeof(efi_char16_t);
>
> 98 typedef struct _gpt_entry {
> 99 efi_guid_t partition_type_guid;
> 100 efi_guid_t unique_partition_guid;
> 101 __le64 starting_lba;
> 102 __le64 ending_lba;
> 103 gpt_entry_attributes attributes;
> 104 efi_char16_t partition_name[72 / sizeof (efi_char16_t)];
> 105 } __attribute__ ((packed)) gpt_entry;
>>>>>>
>
> partition name is of type efi_char16_t, so name_len will always be 1
>
> Is it possible that the compiler gets confused when trying to optimize
> this loop?
> Any ideas how to tackle this?
>
> Thanks
>
> Erich
>
>
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