gcc/c-pragma.h

   1 /* Pragma related interfaces.
   2    Copyright (C) 1995, 1998, 1999 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 #endif /* HANDLE_PRAGMA_PACK_PUSH_POP */
  43
  44
  45 #ifdef HANDLE_PRAGMA_WEAK
  46 /* This structure contains any weak symbol declarations waiting to be emitted.  */
  47 struct weak_syms
  48 {
  49   struct weak_syms * next;
  50   char * name;
  51   char * value;
  52 };
  53
  54 /* Declared in varasm.c */
  55 extern struct weak_syms * weak_decls;
  56
  57 extern int add_weak PROTO((char *, char *));
  58 #endif /* HANDLE_PRAGMA_WEAK */
  59
  60
  61 /* Define HANDLE_GENERIC_PRAGMAS if any kind of front-end pragma
  62    parsing is to be done.  The code in GCC's generic C source files
  63    will only look for the definition of this constant.  They will
  64    ignore definitions of HANDLE_PRAGMA_PACK and so on.
  65    With #pragma poison, this is always set.  */
  66 #define HANDLE_GENERIC_PRAGMAS 1
  67
  68
  69 #ifdef HANDLE_GENERIC_PRAGMAS
  70 enum pragma_state
  71 {
  72   ps_start,
  73   ps_done,
  74 #ifdef HANDLE_PRAGMA_WEAK
  75   ps_weak,
  76   ps_name,
  77   ps_equals,
  78   ps_value,
  79 #endif
  80 #ifdef HANDLE_PRAGMA_PACK
  81   ps_pack,
  82   ps_left,
  83   ps_align,
  84   ps_right,
  85 #endif
  86 #ifdef HANDLE_PRAGMA_PACK_PUSH_POP
  87   ps_push, ps_pushcomma, ps_pushid, ps_pushcomma2,
  88   ps_pop, ps_popcomma,
  89 #endif
  90   ps_poison,
  91   ps_bad
  92 };
  93
  94 /* Handle a C style pragma */
  95 extern int handle_pragma_token PROTO((const char *, tree));
  96
  97 #endif /* HANDLE_GENERIC_PRAGMAS */
  98
  99 extern void init_pragma PROTO((void));
 100
 101 #endif /* _C_PRAGMA_H */