[libdvdcss-devel] build: use an alternative method for making O_BINARY use conditional.

[Diego Biurrun]

On Wed, Feb 27, 2013 at 07:55:28AM +0100, Diego Elio Pettenò wrote:
> 
> --- a/configure.ac
> +++ b/configure.ac
> @@ -52,11 +52,25 @@ AC_C_CONST
>  
> -AC_CHECK_HEADERS(unistd.h sys/param.h sys/uio.h limits.h pwd.h errno.h)
> +AC_CHECK_HEADERS([unistd.h sys/param.h sys/uio.h limits.h pwd.h]dnl
> +  [errno.h sys/types.h sys/stat.h fcntl.h io.h])

What's the "dnl" at the end of the line for?

Diego