Re: tempname.c vs. mingw

[Paul Eggert]

Eric Blake <address@hidden> writes:

> +#if ! HAVE_DECL_MKDIR
> +# if HAVE_IO_H
> +#  include <io.h>
> +# endif
> +# define mkdir ((int (*)()) _mkdir)
> +#endif

Surely this won't work if ! HAVE_DECL_MKDIR && ! HAVE_IO_H, since
_mkdir will be undefined in that case.  Also, older Unix systems lack
a mkdir declaration, but have mkdir (it may not fit the prototype,
though, so you shouldn't declare it without checking).  Also the
"#define" gives me the heebie-jeebies, since it relies on undefined
behavior (passing the wrong number of arguments to a C function).

How about something like this instead?

#if ! HAVE_DECL_MKDIR && HAVE_IO_H
# include <io.h>
static int mkdir (char const *name, mode_t mode) { return _mkdir (name); }
#endif

Other than that, it looks good to me; thanks.