AC_CHECK_LIB(gssapi_krb5, GSS_C_NT_COMPOSITE_EXPORT, [AC_DEFINE_UNQUOTED([HAVE_GSS_C_NT_COMPOSITE_EXPORT], 1, [Define if GSS-API library supports recent naming extensions draft])], [], "$KRB5_LIBS")
AC_CHECK_LIB(gssapi_krb5, gss_inquire_attrs_for_mech, [AC_DEFINE_UNQUOTED([HAVE_GSS_INQUIRE_ATTRS_FOR_MECH], 1, [Define if GSS-API library supports RFC 5587])], [], "$KRB5_LIBS")
AC_CHECK_LIB(gssapi_krb5, gss_krb5_import_cred, [AC_DEFINE_UNQUOTED([HAVE_GSS_KRB5_IMPORT_CRED], 1, [Define if GSS-API library supports gss_krb5_import_cred])], [], "$KRB5_LIBS")
- AC_CHECK_LIB(krb5, heimdal_version, [AC_DEFINE_UNQUOTED([HAVE_HEIMDAL_VERSION], 1, [Define if building against Heimdal Kerberos implementation])], [], "$KRB5_LIBS")
+ AC_CHECK_LIB(krb5, heimdal_version, [AC_DEFINE_UNQUOTED([HAVE_HEIMDAL_VERSION], 1, [Define if building against Heimdal Kerberos implementation]), heimdal=yes], [heimdal=no], "$KRB5_LIBS")
+ AM_CONDITIONAL(HEIMDAL, test "x$heimdal" != "xno")
fi
])dnl