[options] better option for having reparseable code

hide -kernel-msg-key behind a proper FCLang option

frama_Clang_option.ml

@@ -142,6 +142,11 @@ module ParseableOutput =
       let option_name = "-cxx-parseable-output"
       let help = "set up Frama-C pretty-printer to output C code that can be reparsed by Frama-C"
     end)
+let () =
+  ParseableOutput.add_set_hook
+    (fun _ f ->
+      let k = Kernel.dkey_print_attrs in
+      if f then Kernel.add_debug_keys k else Kernel.del_debug_keys k)
 
 module C_std_headers = 
   String(

tests/basic/printer.cpp

 /* run.config
 NOFRAMAC:
-EXECNOW: LOG printer.res.c @frama-c@ @PTEST_FILE@ @CXX@ @MACHDEP@ -cxx-unmangling none -kernel-msg-key printer:attrs -ocode @PTEST_RESULT@/printer.res.c -print
+EXECNOW: LOG printer.res.c @frama-c@ @PTEST_FILE@ @CXX@ @MACHDEP@ -cxx-unmangling none -cxx-parseable-output -ocode @PTEST_RESULT@/printer.res.c -print
 EXECNOW: LOG printer.res2.c @frama-c@ @CXX@ @MACHDEP@ -cxx-unmangling without-qualifier @PTEST_RESULT@/printer.res.c -ocode @PTEST_RESULT@/printer.res2.c -print
 */