cochran_emc.h: packed structs

[Lubomir I. Ivanov]

On 28 October 2014 20:43, Thiago Macieira <thiago at macieira.org> wrote:
> On Tuesday 28 October 2014 09:32:17 Dirk Hohndel wrote:
>> A typical 8 byte sample might look like this:
>>
>> struct sample {
>>         unsigned char temp; // in F
>>         unsigned int16_t depth; // in 1/16 ft
>>         unsigned int16_t deco : 1;
>>         unsigned int16_t tank_idx : 2;
>>         unsigned int16_t marker : 1;
>>         unsigned int16_t ascend_warn : 1;
>>         unsigned int16_t compass : 9;
>>         unsigned int16_t pressure; // in psi
>>         unsigned char flags;
>> }
>>
>> I made this up - it's much simpler than some real structures actually are.
>
> Yep, I get it. But without the packing, there's a 1-byte hole between temp and
> the depth, then one byte tail-padding at the end of the structure.
>

Dirk,
just use this previous patch - keeps everything packed as the author
indented, but simply adds the extra 'gcc_struct' attribute and fixes
the MINGW scenario where 'packed'-only doesn't work the same way as
GCC with 'packed' only.

lubomir
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