[PATCH] Add missing variable_size GTY annotations (was Re: on how to compile gcc-4.6 correctly?)

[Laurynas Biveinis <laurynas dot biveinis at gmail dot com>]

I have reproduced it and the patch below fixes the issue, sorry for
breaking things. Dennis, could you see if it works for you?

When gcc-core tarball is used without other frontends, gengtype does
not get to see that lang_type is in fact variable_size and when the
frontends are present, their variable_size annotations mask the fact
that c-lang.h does not have it. This is something that really should
be diagnosed by gengtype.

I will apply it to trunk later as obvious.

gcc/ChangeLog:

2010-09-14  Laurynas Biveinis  <laurynas.biveinis@gmail.com>

        * c-lang.h (struct lang_type): Add variable_size GTY option.

gcc/lto/ChangeLog:

2010-09-14  Laurynas Biveinis  <laurynas.biveinis@gmail.com>

        * lto-tree.h (struct lang_type): Add variable_size GTY option.

*** gcc-4.6-20100911/gcc/c-lang.h.original      2010-09-14
14:55:45.000000000 +0200
--- gcc-4.6-20100911/gcc/c-lang.h       2010-09-14 14:57:08.000000000 +0200
*************** along with GCC; see the file COPYING3.
*** 24,30 ****
  #include "c-family/c-common.h"
  #include "ggc.h"

! struct GTY(()) lang_type {
    /* In a RECORD_TYPE, a sorted array of the fields of the type.  */
    struct sorted_fields_type * GTY ((reorder ("resort_sorted_fields"))) s;
    /* In an ENUMERAL_TYPE, the min and max values.  */
--- 24,30 ----
  #include "c-family/c-common.h"
  #include "ggc.h"

! struct GTY((variable_size)) lang_type {
    /* In a RECORD_TYPE, a sorted array of the fields of the type.  */
    struct sorted_fields_type * GTY ((reorder ("resort_sorted_fields"))) s;
    /* In an ENUMERAL_TYPE, the min and max values.  */
*** gcc-4.6-20100911/gcc/lto/lto-tree.h.orig    2010-09-14
14:59:11.000000000 +0200
--- gcc-4.6-20100911/gcc/lto/lto-tree.h 2010-09-14 14:59:25.000000000 +0200
*************** struct GTY(()) lang_decl
*** 33,39 ****
    int dummy;  /* Added because ggc does not like empty structs.  */
  };

! struct GTY(()) lang_type
  {
    int dummy;  /* Added because ggc does not like empty structs.  */
  };
--- 33,39 ----
    int dummy;  /* Added because ggc does not like empty structs.  */
  };

! struct GTY((variable_size)) lang_type
  {
    int dummy;  /* Added because ggc does not like empty structs.  */
  };



-- 
Laurynas