Possible arguments: (none), base
      (default), heimdal, mit,
      flags, bootstrap
Handle dependencies needed by consumers of the
      GSS-API.  Only libraries that provide the
      Kerberos mechanism are available.  By
      default, or set to base, the
      GSS-API library from the base system is used.
      Can also be set to heimdal to use security/heimdal, or
      mit to use security/krb5.
When the local Kerberos
      installation is not in LOCALBASE, set
      HEIMDAL_HOME (for heimdal)
      or KRB5_HOME (for krb5) to
      the location of the Kerberos
      installation.
These variables are exported for the ports to use:
GSSAPIBASEDIR
GSSAPICPPFLAGS
GSSAPIINCDIR
GSSAPILDFLAGS
GSSAPILIBDIR
GSSAPILIBS
GSSAPI_CONFIGURE_ARGS
The flags option can be given alongside
      base, heimdal, or
      mit to automatically add
      GSSAPICPPFLAGS,
      GSSAPILDFLAGS, and
      GSSAPILIBS to CFLAGS,
      LDFLAGS, and LDADD,
      respectively.  For example, use
      base,flags.
The bootstrap option is a special prefix
      only for use by security/krb5 and
      security/heimdal.  For example,
      use bootstrap,mit.
OPTIONS_SINGLE=	GSSAPI
OPTIONS_SINGLE_GSSAPI=	GSSAPI_BASE GSSAPI_HEIMDAL GSSAPI_MIT GSSAPI_NONE
GSSAPI_BASE_USES=	gssapi
GSSAPI_BASE_CONFIGURE_ON=	--with-gssapi=${GSSAPIBASEDIR} ${GSSAPI_CONFIGURE_ARGS}
GSSAPI_HEIMDAL_USES=	gssapi:heimdal
GSSAPI_HEIMDAL_CONFIGURE_ON=	--with-gssapi=${GSSAPIBASEDIR} ${GSSAPI_CONFIGURE_ARGS}
GSSAPI_MIT_USES=	gssapi:mit
GSSAPI_MIT_CONFIGURE_ON=	--with-gssapi=${GSSAPIBASEDIR} ${GSSAPI_CONFIGURE_ARGS}
GSSAPI_NONE_CONFIGURE_ON=	--without-gssapiAll FreeBSD documents are available for download at https://download.freebsd.org/ftp/doc/
Questions that are not answered by the
    documentation may be
    sent to <freebsd-questions@FreeBSD.org>.
    Send questions about this document to <freebsd-doc@FreeBSD.org>.