gcc/config/vax/xm-vms.h

   1 /* Configuration for GNU C-compiler for Vax.
   2    Copyright (C) 1987, 1994, 1995, 1996, 1997 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 /* #defines that need visibility everywhere.  */
  22 #define FALSE 0
  23 #define TRUE 1
  24
  25 /* Other configurations get these via autoconfig.  */
  26 #define STDC_HEADERS 1
  27 #define HAVE_STDLIB_H 1
  28 #define HAVE_STRING_H 1
  29
  30 #if defined(VAXC) || defined(__DECC)
  31 /* if compiling with VAXC, need to fix problem with <stdio.h>
  32    which defines a macro called FILE_TYPE that breaks "tree.h".
  33    Fortunately it uses #ifndef to suppress multiple inclusions.
  34    Three possible cases:
  35         1) <stdio.h> has already been included -- ours will be no-op;
  36         2) <stdio.h> will be included after us -- "theirs" will be no-op;
  37         3) <stdio.h> isn't needed -- including it here shouldn't hurt.
  38    In all three cases, the problem macro will be removed here.  */
  39 #include <stdio.h>
  40 #undef FILE_TYPE
  41 #endif
  42
  43 /* target machine dependencies.
  44    tm.h is a symbolic link to the actual target specific file.   */
  45 #include "tm.h"
  46
  47 /* This describes the machine the compiler is hosted on.  */
  48 #define HOST_BITS_PER_CHAR 8
  49 #define HOST_BITS_PER_SHORT 16
  50 #define HOST_BITS_PER_INT 32
  51 #define HOST_BITS_PER_LONG 32
  52 #define HOST_BITS_PER_LONGLONG 64
  53
  54 #define HOST_FLOAT_FORMAT VAX_FLOAT_FORMAT
  55
  56 #define SUCCESS_EXIT_CODE 1
  57 #define FATAL_EXIT_CODE (44 | 0x10000000)  /* Abort, and no DCL message.  */
  58
  59 /* A couple of conditionals for execution machine are controlled here.  */
  60 #ifndef VMS
  61 #define VMS
  62 #endif
  63
  64 #ifndef __GNUC__
  65 /* not present, at least in VAX-11 C (VMS) v2.2 */
  66 #define R_OK 4
  67 #define W_OK 2
  68 #define X_OK 1
  69 #define F_OK 0
  70 #endif
  71
  72 #define GCC_INCLUDE_DIR "///not used with VMS///"       /* nonsense string for now */
  73
  74 /* and define a local equivalent (sort of) for unlink */
  75 #define unlink remove
  76
  77 /* Used by the preprocessor to limit size of disk I/O chunks.
  78    64K - 1 is the maximum supported by VAXCRTL.  Amounts in excess
  79    of 35 blocks will bypass the VMS V6.x VIOC [Virtual I/O Cache],
  80    so we'll pick a limit of 16K (32 blocks).  */
  81 #define MAX_READ_LEN    (32 * 512)
  82 #define MAX_WRITE_LEN   (32 * 512)
  83
  84 /* Under VMS a directory specification can be enclosed either in square
  85    brackets or in angle brackets.  Thus we need to check both.  This
  86    macro is used to help compare filenames in cp-lex.c.
  87
  88    We also need to make sure that the names are all lower case, because
  89    we must be able to compare filenames to determine if a file implements
  90    a class.  */
  91
  92 #define FILE_NAME_NONDIRECTORY(C)                               \
  93 ({                                                              \
  94    char * pnt_ = (C), * pnt1_;                                  \
  95    pnt1_ = pnt_ - 1;                                            \
  96    while (*++pnt1_)                                             \
  97      if ((*pnt1_ >= 'A' && *pnt1_ <= 'Z')) *pnt1_ |= 0x20;      \
  98    pnt1_ = rindex (pnt_, ']');                                  \
  99    pnt1_ = (pnt1_ == 0 ? rindex (pnt_, '>') : pnt1_);           \
 100    pnt1_ = (pnt1_ == 0 ? rindex (pnt_, ':') : pnt1_);           \
 101    (pnt1_ == 0 ? pnt_ : pnt1_ + 1);                             \
 102  })
 103
 104 /* Macro to generate the name of the cross reference file.  The standard
 105    one does not work, since it was written assuming that the conventions
 106    of a unix style filesystem will work on the host system.  */
 107
 108 #define XREF_FILE_NAME(BUFF, NAME)      \
 109   s = FILE_NAME_NONDIRECTORY (NAME);                    \
 110   if (s == NAME) sprintf(BUFF, "%s_gxref", NAME);       \
 111   else {                                                \
 112     strcpy(BUFF, NAME);                                 \
 113     strcat(BUFF, "_gxref");                             \
 114   }
 115
 116 /* Macro that is used in cp-xref.c to determine whether a file name is
 117    absolute or not.  */
 118
 119 #define FILE_NAME_ABSOLUTE_P(NAME)      \
 120         (FILE_NAME_NONDIRECTORY (NAME) != (&NAME[1]))
 121
 122 /* FILE_NAME_JOINER is defined to be the characters that are inserted between
 123    a directory name and a filename in order to make an absolute file
 124    specification.  Under VMS the directory specification contains all of the
 125    required characters, so we define this to be a null string.  */
 126
 127 #define FILE_NAME_JOINER ""
 128
 129 /* vprintf() has been available since VMS V4.6.  */
 130
 131 #define HAVE_VPRINTF
 132 \f
 133 #if defined(VAXC) || defined(__DECC)
 134 /* Customizations/kludges for building with DEC's VAX C compiler
 135    rather than GCC.  */
 136 #define NO_SYS_PARAMS_H         /* don't have <sys/params.h> */
 137 #define NO_STAB_H               /* don't have <stab.h> */
 138 #define USE_C_ALLOCA            /* using alloca.c */
 139 #define QSORT_WORKAROUND        /* do not use VAXCRTL's qsort */
 140
 141 /* use ANSI/SYSV style byte manipulation routines instead of BSD ones */
 142 /* rename all too-long external symbol names to avoid warnings */
 143 #define bc_check_for_full_enumeration_handling  bc_check_for_full_enum_handling
 144 #define check_for_full_enumeration_handling     check_for_full_enum_handling
 145 #define current_function_contains_functions     curfunc_contains_functions
 146 #define current_function_epilogue_delay_list    curfunc_epilogue_delay_list
 147 #define current_function_has_nonlocal_goto      curfunc_has_nonlocal_goto
 148 #define current_function_has_nonlocal_label     curfunc_has_nonlocal_label
 149 #define current_function_internal_arg_pointer   curfunc_internal_arg_pointer
 150 #define current_function_outgoing_args_size     curfunc_outgoing_args_size
 151 #define current_function_pretend_args_size      curfunc_pretend_args_size
 152 #define current_function_returns_pcc_struct     curfunc_returns_pcc_struct
 153 #define current_function_returns_pointer        curfunc_returns_pointer
 154 #define current_function_uses_const_pool        curfunc_uses_const_pool
 155 #define current_function_uses_pic_offset_table  curfunc_uses_pic_offset_table
 156 #define dbxout_resume_previous_source_file      dbxout_resume_previous_src_file
 157 #define expand_builtin_extract_return_addr      expand_builtin_extract_ret_addr
 158 #define expand_builtin_set_return_addr_reg      expand_builtin_set_ret_addr_reg
 159 #define expand_start_loop_continue_elsewhere    expnd_start_loop_cont_elsewhere
 160 #define flag_schedule_insns_after_reload        flag_sched_insns_after_reload
 161 #define get_dynamic_handler_chain_libfunc       get_dynamic_hndlr_chain_libfunc
 162 #define lookup_name_current_level_global        lookup_name_current_level_gbl
 163 #define maybe_building_objc_message_expr        maybe_building_objc_msg_expr
 164 #define mesg_implicit_function_declaration      mesg_implicit_func_declaration
 165 #define output_deferred_addressed_constants     output_deferred_addr_constants
 166 #define protect_cleanup_actions_with_terminate  protect_cleanup_act_w_terminate
 167 #define reg_overlap_mentioned_for_reload_p      reg_overlap_mtnd_for_reload_p
 168 #define reposition_prologue_and_epilogue_notes  repos_prolog_and_epilog_notes
 169 #define rtx_equal_function_value_matters        rtx_equal_func_value_matters
 170 #define set_new_first_and_last_label_num        set_new_first_and_last_lbl_num
 171 #define thread_prologue_and_epilogue_insns      thread_prolog_and_epilog_insns
 172 #endif
 173
 174 /* We need to avoid the library qsort routine, due to a serious bug
 175    in VAXCRTL.  (Sorting anything with size that's not a multiple of 4
 176    after having previously sorted something that was a multiple of 4
 177    can produce wrong results and result in data corruption.)  We'll
 178    use our own substitute (in vax.c) instead.  */
 179 /* #define QSORT_WORKAROUND */
 180 #ifdef QSORT_WORKAROUND
 181 #define qsort not_qsort
 182 #endif
 183
 184 #ifdef __DECC
 185 /* DECC$SHR doesn't have VAXCRTL's bugs.  */
 186 #undef QSORT_WORKAROUND
 187 #undef qsort
 188 /* Avoid a lot of informational level diagnostics about implicitly
 189    declared functions.  */
 190 #include <stdlib.h>
 191 #include <string.h>
 192 /* this is for genopinit.c */
 193  #pragma message disable (undefescap)
 194 #endif
 195
 196 #if defined(USE_C_ALLOCA) && !defined(alloca)
 197 /* Declare alloca() using similar logic to that in alloca.c.  */
 198 #ifdef __STDC__
 199 extern void *alloca(unsigned);
 200 #else
 201 extern char *alloca();
 202 #endif
 203 #endif