Build error on windows.

[antithing]

Hi, i am trying to compile on widows, visual studio 2015, and i am getting errors on all these lines:

EEKF_DECL_MAT_DYN

Error C2133 'Ct_elements': unknown size eekf D:\eekf-master\src\eekf.c 123

What am I doing wrong here?

Thank you for making this code available!

[dr-duplo]

Hi, thank you for reporting the issue. I only used GNU based tools with this code, which support parameter dependent array sizes (came in with C99, support for C++ by GNU). But there's an alternative: alloca(). You could do the following:

1. Replace the definition of with EEKF_DECL_MAT_DYN
   #define EEKF_DECL_MAT_DYN(name, rows, cols)\ eekf_value name##_elements[(rows)*(cols)];\ eekf_mat name = {name##_elements, (rows), (cols)};
   with
   #define EEKF_DECL_MAT_DYN(name, rows, cols)\ eekf_value name##_elements = (eekf_value *) _alloca((rows)*(cols)*sizeof(eekf_value));\ eekf_mat name = {name##_elements, (rows), (cols)}

2. Don't forget the include. probably <malloc.h>.

3. Make a compiler dependent code switch around it.

4. I would appreciate your pull request.

PS: _alloca allocates memory on the current stack. there's no need to free it as it will be thrown away when the function returns.