mkdir (GNU Gnulib)

Gnulib module: sys_stat or mkdir

Portability problems fixed by either Gnulib module sys_stat or mkdir:

This function is declared in different header files (namely, <io.h> or <direct.h>) on some platforms: mingw, MSVC 14.
On Windows platforms (excluding Cygwin), this function is called _mkdir and takes only one argument. The fix (without Gnulib) is to define a macro like this:
```
#define mkdir ((int (*)()) _mkdir)
```
or
```
#define mkdir(path,mode) _mkdir (path)
```

Portability problems fixed by Gnulib module mkdir:

When the argument ends in a slash, the function call fails on some platforms.
This function mistakenly succeeds on ‘mkdir("d/./",mode)’ on some platforms: Cygwin 1.5.x, mingw, MSVC 14.

Portability problems not fixed by Gnulib: