Gentoo bug #389349
--- cyrus-sasl-2.1.27/m4/sasl2.m4
+++ cyrus-sasl-2.1.27/m4/sasl2.m4
@@ -220,7 +220,11 @@
                  [AC_WARN([Cybersafe define not found])])
 
   elif test "$ac_cv_header_gssapi_h" = "yes"; then
-    AC_EGREP_HEADER(GSS_C_NT_HOSTBASED_SERVICE, gssapi.h,
+    AC_EGREP_CPP(hostbased_service_gss_nt_yes, gssapi.h,
+                 [#include <gssapi.h>
+                  #ifdef GSS_C_NT_HOSTBASED_SERVICE
+                    hostbased_service_gss_nt_yes
+                  #endif],
                     [AC_DEFINE(HAVE_GSS_C_NT_HOSTBASED_SERVICE,,
                                [Define if your GSSAPI implementation defines GSS_C_NT_HOSTBASED_SERVICE])])
   elif test "$ac_cv_header_gssapi_gssapi_h"; then