I am using SDl2.dll on Windows and libSDL2.so on Linux I was testing out wide string functionality when I saw that it behaved differently across diferent platforms SDL_wcslen.

Code:

var  
  WStr: array [0..7] of WideChar; //one char 2 bytes
begin
  WStr[0] := 'a';
  WStr[1] := #0;
  AssertEquals(1, SDL_wcslen(WStr)); //Work on Windows fails on Linux  
end; 

var  
  WStr: array [0..7] of Integer; //one char 4 bytes
begin
  WStr[0] := Ord('a');
  WStr[1] := 0;
  AssertEquals(1, SDL_wcslen(WStr)); //Work on Linux fails on Windows  
end; 

It looks like to me that in SDL2.dll wchar_t is 2 bytes long and in libSDL2.so it is 4 bytes long. I have question is it true or is it bug? Or it is 4 bytes long in bought but windows magically works?