[libcamera-devel] FTBFS on i386 with 4de31ccc9

[Jan Engelhardt]

On Friday 2020-03-20 01:50, Laurent Pinchart wrote:
>> 
>> [    6s] ../include/libcamera/controls.h:173:36: error: static assertion failed: Invalid size of ControlValue class
>> [    6s]   173 | static_assert(sizeof(ControlValue) == 16, "Invalid size of ControlValue class");
>> 
>> Naturally, the struct on this architecture is 12, not 16.
>> 
>> 25b  {   ControlType type_ : 8;
>> =4B  {   bool isArray_ : 1;
>>      {   std::size_t numElements_ : 16;
>> 
>> 8B   {   union {
>>                   uint64_t value_;
>>                   void *storage_;
>>          };
>
>Out of curiosity, is the above description of the class storage written
>manually, or generated by a code inspection tool ? In the latter case
>I'm interested to know what tool it would be.

Just manually.

But if you are interested in tools, there is /usr/bin/pahole in the "dwarves"
package which would show something similar (for C programs; does not deal very
well with C++).