Just use mkstemp unconditionally; liblutil will fill in if the system doesn't.

clients/ud/edit.c

@@ -141,7 +141,6 @@ load_editor( void )
 		printf("->load_editor()\n");
 #endif
 
-#ifdef HAVE_MKSTEMP
 	strcpy(entry_temp_file, LDAP_TMPDIR LDAP_DIRSEP "udXXXXXX");
 
 	{
@@ -158,14 +157,6 @@ load_editor( void )
 		}
 	}
 
-#else
-	fp = tmpfile();
-	if ( fp == NULL ) {
-		perror("tmpfile");
-		return(-1);
-	}
-#endif
-
 	fprintf(fp, "## Directory entry of %s\n", Entry.name);
 	fprintf(fp, "##\n");
 	fprintf(fp, "## Syntax is:\n");