[1/2] kerberos: Add a stub for Kerberos5 Authentication Package.

[Hans Leidekker]

Hi Dmitry,

Thanks. Alexandre pointed out that we do not need to load libkrb5
dynamically because libgssapi_krb5 depends on libkrb5. So if libkrb5
is missing the SSP wouldn't be usable anyway.

> diff --git a/configure.ac b/configure.ac
> index 58737162a8..82faa4b943 100644
> --- a/configure.ac
> +++ b/configure.ac
> @@ -422,6 +422,7 @@ AC_CHECK_HEADERS(\
>  	ieeefp.h \
>  	inet/mib2.h \
>  	io.h \
> +	krb5/krb5.h \
>  	kstat.h \
>  	libproc.h \
>  	link.h \
> @@ -1625,6 +1626,14 @@ fi
>  WINE_NOTICE_WITH(gsm,[test "x$ac_cv_lib_soname_gsm" = "x"],
>                   [libgsm ${notice_platform}development files not found, gsm 06.10 codec won't be supported.])
>  
> +dnl **** Check for krb5 ****
> +if test "$ac_cv_header_krb5_krb5_h" = "yes"
> +then
> +    WINE_CHECK_SONAME(krb5,krb5_init_context)
> +fi
> +WINE_NOTICE_WITH(krb5,[test "x$ac_cv_lib_soname_krb5" = "x"],
> +                 [libkrb5 ${notice_platform}development files not found, krb5 won't be supported.])
> +

There is pkgconfig support for krb5. I guess we want to use it.

You need to guard the code that uses krb5 functions with an ifdef or it
will fail to compile if the headers are missing.