gcc/c-pragma.h

   1 /* Pragma related interfaces.
   2    Copyright (C) 1995, 1998 Free Software Foundation, Inc.
   3
   4 This file is part of GNU CC.
   5
   6 GNU CC is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 2, or (at your option)
   9 any later version.
  10
  11 GNU CC is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GNU CC; see the file COPYING.  If not, write to
  18 the Free Software Foundation, 59 Temple Place - Suite 330,
  19 Boston, MA 02111-1307, USA.  */
  20
  21 #ifndef _C_PRAGMA_H
  22 #define _C_PRAGMA_H
  23
  24 #ifdef HANDLE_SYSV_PRAGMA
  25 /* Support #pragma weak iff ASM_WEAKEN_LABEL and ASM_OUTPUT_DEF are
  26    defined.  */
  27 #if defined (ASM_WEAKEN_LABEL) && defined (ASM_OUTPUT_DEF)
  28 #define HANDLE_PRAGMA_WEAK SUPPORTS_WEAK
  29 #endif
  30
  31 /* We always support #pragma pack for SYSV pragmas.  */
  32 #ifndef HANDLE_PRAGMA_PACK
  33 #define HANDLE_PRAGMA_PACK 1
  34 #endif
  35 #endif /* HANDLE_SYSV_PRAGMA */
  36
  37
  38 #ifdef HANDLE_PRAGMA_PACK_PUSH_POP
  39 /* If we are supporting #pragma pack(push... then we automatically
  40    support #pragma pack(<n>)  */
  41 #define HANDLE_PRAGMA_PACK 1
  42 #define PRAGMA_INSERT_ATTRIBUTES(node, pattr, prefix_attr) \
  43   insert_pack_attributes (node, pattr, prefix_attr)
  44 extern void insert_pack_attributes PROTO((tree, tree *, tree *));
  45 #endif /* HANDLE_PRAGMA_PACK_PUSH_POP */
  46
  47
  48 #ifdef HANDLE_PRAGMA_WEAK
  49 /* This structure contains any weak symbol declarations waiting to be emitted.  */
  50 struct weak_syms
  51 {
  52   struct weak_syms * next;
  53   char * name;
  54   char * value;
  55 };
  56
  57 /* Declared in varasm.c */
  58 extern struct weak_syms * weak_decls;
  59 #endif /* HANDLE_PRAGMA_WEAK */
  60
  61
  62 #if defined HANDLE_PRAGMA_PACK || defined HANDLE_PRAGMA_WEAK
  63 /* Define HANDLE_GENERIC_PRAGMAS if any kind of front-end pragma
  64    parsing is to be done.  The code in GCC's generic C source files
  65    will only look for the definition of this constant.  They will
  66    ignore definitions of HANDLE_PRAGMA_PACK and so on.  */
  67 #define HANDLE_GENERIC_PRAGMAS 1
  68 #endif
  69
  70
  71 #ifdef HANDLE_GENERIC_PRAGMAS
  72 enum pragma_state
  73 {
  74   ps_start,
  75   ps_done,
  76 #ifdef HANDLE_PRAGMA_WEAK
  77   ps_weak,
  78   ps_name,
  79   ps_equals,
  80   ps_value,
  81 #endif
  82 #ifdef HANDLE_PRAGMA_PACK
  83   ps_pack,
  84   ps_left,
  85   ps_align,
  86   ps_right,
  87 #endif
  88 #ifdef HANDLE_PRAGMA_PACK_PUSH_POP
  89   ps_push,
  90   ps_pop,
  91   ps_comma,
  92 #endif
  93   ps_bad
  94 };
  95
  96 /* Handle a C style pragma */
  97 extern int handle_pragma_token PROTO((char *, tree));
  98
  99 #endif /* HANDLE_GENERIC_PRAGMAS */
 100 #endif /* _C_PRAGMA_H */