gnu/usr.bin/g++/cc1plus/flags.h

   1 /* Compilation switch flag definitions for GNU CC.
   2    Copyright (C) 1987, 1988 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 1, 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, 675 Mass Ave, Cambridge, MA 02139, USA.  */
  19
  20 /* Name of the input .c file being compiled.  */
  21 extern char *main_input_filename;
  22
  23 /* 1 => write gdb debugging output (using symout.c).
  24    2 => write dbx debugging output (using dbxout.c).
  25    3 => write sdb debugging output (using sdbout.c).  */
  26 enum debugger { NO_DEBUG = 0, GDB_DEBUG = 1, DBX_DEBUG = 2, SDB_DEBUG = 3,
  27                 EXTENDED_DBX_DEBUG = 4, LINENO_DEBUG };
  28
  29 extern enum debugger write_symbols;
  30
  31 /* Nonzero means use GDB-only extensions of DBX format.  */
  32 extern int use_gdb_dbx_extensions;
  33
  34 /* Nonzero means do optimizations.  -opt.  */
  35
  36 extern int optimize;
  37
  38 /* Nonzero means do stupid register allocation.  -noreg.
  39    Currently, this is 1 if `optimize' is 0.  */
  40
  41 extern int obey_regdecls;
  42
  43 /* Don't print functions as they are compiled and don't print
  44    times taken by the various passes.  -quiet.  */
  45
  46 extern int quiet_flag;
  47
  48 /* Don't print warning messages.  -w.  */
  49
  50 extern int inhibit_warnings;
  51
  52 /* Do print extra warnings (such as for uninitialized variables).  -W.  */
  53
  54 extern int extra_warnings;
  55
  56 /* Nonzero to warn about unused local variables.  */
  57
  58 extern int warn_unused;
  59
  60 /* Nonzero means warn about all declarations which shadow others.   */
  61
  62 extern int warn_shadow;
  63
  64 /* Warn if a switch on an enum fails to have a case for every enum value.  */
  65
  66 extern int warn_switch;
  67
  68 /* Warn if a type conversion is done that might have confusing results.  */
  69
  70 extern int warn_conversion;
  71
  72 /* Nonzero means warn about any identifiers that match in the first N
  73    characters.  The value N is in `id_clash_len'.  */
  74
  75 extern int warn_id_clash;
  76 extern int id_clash_len;
  77
  78 /* Nonzero means warn if inline function is too large.  */
  79
  80 extern int warn_inline;
  81
  82 /* Nonzero if generating code to do profiling.  */
  83
  84 extern int profile_flag;
  85
  86 /* Nonzero if generating code to do profiling on the basis of basic blocks.  */
  87
  88 extern int profile_block_flag;
  89
  90 /* Nonzero for -pedantic switch: warn about anything
  91    that standard C or C++ forbids.  */
  92
  93 extern int pedantic;
  94 \f
  95 /* Now the symbols that are set with `-f' switches.  */
  96
  97 /* Nonzero means `char' should be signed.  */
  98
  99 extern int flag_signed_char;
 100
 101 /* Nonzero means give an enum type only as many bytes as it needs.  */
 102
 103 extern int flag_short_enums;
 104
 105 /* Nonzero for -fcaller-saves: allocate values in regs that need to
 106    be saved across function calls, if that produces overall better code.
 107    Optional now, so people can test it.  */
 108
 109 extern int flag_caller_saves;
 110
 111 /* Nonzero for -fpcc-struct-return: return values the same way PCC does.  */
 112
 113 extern int flag_pcc_struct_return;
 114
 115 /* Nonzero for -fforce-mem: load memory value into a register
 116    before arithmetic on it.  This makes better cse but slower compilation.  */
 117
 118 extern int flag_force_mem;
 119
 120 /* Nonzero for -fforce-addr: load memory address into a register before
 121    reference to memory.  This makes better cse but slower compilation.  */
 122
 123 extern int flag_force_addr;
 124
 125 /* Nonzero for -fdefer-pop: don't pop args after each function call;
 126    instead save them up to pop many calls' args with one insns.  */
 127
 128 extern int flag_defer_pop;
 129
 130 /* Nonzero for -ffloat-store: don't allocate floats and doubles
 131    in extended-precision registers.  */
 132
 133 extern int flag_float_store;
 134
 135 /* Nonzero for -fcombine-regs:
 136    allow instruction combiner to combine an insn
 137    that just copies one reg to another.  */
 138
 139 extern int flag_combine_regs;
 140
 141 /* Nonzero enables strength-reduction in loop.c.  */
 142
 143 extern int flag_strength_reduce;
 144
 145 /* Nonzero for -fcse-follow-jumps:
 146    have cse follow jumps to do a more extensive job.  */
 147
 148 extern int flag_cse_follow_jumps;
 149
 150 /* Nonzero for -fwritable-strings:
 151    store string constants in data segment and don't uniquize them.  */
 152
 153 extern int flag_writable_strings;
 154
 155 /* Nonzero means don't put addresses of constant functions in registers.
 156    Used for compiling the Unix kernel, where strange substitutions are
 157    done on the assembly output.  */
 158
 159 extern int flag_no_function_cse;
 160
 161 /* Nonzero for -fomit-frame-pointer:
 162    don't make a frame pointer in simple functions that don't require one.  */
 163
 164 extern int flag_omit_frame_pointer;
 165
 166 /* Nonzero to inhibit use of define_optimization peephole opts.  */
 167
 168 extern int flag_no_peephole;
 169
 170 /* Nonzero means all references through pointers are volatile.  */
 171
 172 extern int flag_volatile;
 173
 174 /* Nonzero means make functions that look like good inline candidates
 175    go inline.  */
 176
 177 extern int flag_inline_functions;
 178
 179 /* Nonzero for -fkeep-inline-functions: even if we make a function
 180    go inline everywhere, keep its defintion around for debugging
 181    purposes.  */
 182
 183 extern int flag_keep_inline_functions;
 184
 185 /* Nonzero if we are only using compiler to check syntax errors.  */
 186
 187 extern int flag_syntax_only;
 188
 189 /* Nonzero means make the text shared if supported.  */
 190
 191 extern int flag_shared_data;
 192
 193 /* Nonzero means put things in delayed-branch slots if supported. */
 194
 195 extern int flag_delayed_branch;
 196
 197 /* Nonzero means do basic-block instruction scheduling.  */
 198
 199 extern int flag_schedule_insns;
 200 \f
 201 /* Other basic status info about current function.  */
 202
 203 /* Nonzero means current function must be given a frame pointer.
 204    Set in stmt.c if anything is allocated on the stack there.
 205    Set in reload1.c if anything is allocated on the stack there.  */
 206
 207 extern int frame_pointer_needed;
 208
 209 /* Nonzero if function being compiled receives nonlocal gotos
 210    from nested functions.  */
 211
 212 extern int current_function_has_nonlocal_label;