Limits the size of the largest objects in the small data section.
-sdata[threshold] size
The size value specifies the maximum size, in bytes, of all objects in the small data section (typically named ".sdata"). The linker places objects that are greater than this size in the data section (typically named ".data") instead.
You can override this option for a variable in your source code like this
__declspec(section ".sdata") extern int bigobj[25];
The default value for size is 8.
This is a linker option.