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1.1 root 1: /* Compilation switch flag definitions for GNU CC. 1.1.1.8 ! root 2: Copyright (C) 1987, 1988, 1994, 1995 Free Software Foundation, Inc. 1.1 root 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 1.1.1.8 ! root 18: the Free Software Foundation, 59 Temple Place - Suite 330, ! 19: Boston, MA 02111-1307, USA. */ 1.1 root 20: 21: /* Name of the input .c file being compiled. */ 22: extern char *main_input_filename; 23: 24: enum debug_info_type 25: { 26: NO_DEBUG, /* Write no debug info. */ 27: DBX_DEBUG, /* Write BSD .stabs for DBX (using dbxout.c). */ 28: SDB_DEBUG, /* Write COFF for (old) SDB (using sdbout.c). */ 1.1.1.2 root 29: DWARF_DEBUG, /* Write Dwarf debug info (using dwarfout.c). */ 30: XCOFF_DEBUG /* Write IBM/Xcoff debug info (using dbxout.c). */ 1.1 root 31: }; 32: 33: /* Specify which kind of debugging info to generate. */ 34: extern enum debug_info_type write_symbols; 35: 36: enum debug_info_level 37: { 38: DINFO_LEVEL_NONE, /* Write no debugging info. */ 39: DINFO_LEVEL_TERSE, /* Write minimal info to support tracebacks only. */ 40: DINFO_LEVEL_NORMAL, /* Write info for all declarations (and line table). */ 41: DINFO_LEVEL_VERBOSE /* Write normal info plus #define/#undef info. */ 42: }; 43: 44: /* Specify how much debugging info to generate. */ 45: extern enum debug_info_level debug_info_level; 46: 1.1.1.4 root 47: /* Nonzero means use GNU-only extensions in the generated symbolic 48: debugging information. */ 49: extern int use_gnu_debug_info_extensions; 1.1 root 50: 51: /* Nonzero means do optimizations. -opt. */ 52: 53: extern int optimize; 54: 55: /* Nonzero means do stupid register allocation. -noreg. 56: Currently, this is 1 if `optimize' is 0. */ 57: 58: extern int obey_regdecls; 59: 60: /* Don't print functions as they are compiled and don't print 61: times taken by the various passes. -quiet. */ 62: 63: extern int quiet_flag; 64: 65: /* Don't print warning messages. -w. */ 66: 67: extern int inhibit_warnings; 68: 69: /* Do print extra warnings (such as for uninitialized variables). -W. */ 70: 71: extern int extra_warnings; 72: 73: /* Nonzero to warn about unused local variables. */ 74: 75: extern int warn_unused; 76: 1.1.1.5 root 77: /* Nonzero means warn if inline function is too large. */ 78: 79: extern int warn_inline; 80: 1.1 root 81: /* Nonzero to warn about variables used before they are initialized. */ 82: 83: extern int warn_uninitialized; 84: 85: /* Nonzero means warn about all declarations which shadow others. */ 86: 87: extern int warn_shadow; 88: 89: /* Warn if a switch on an enum fails to have a case for every enum value. */ 90: 91: extern int warn_switch; 92: 93: /* Nonzero means warn about function definitions that default the return type 94: or that use a null return and have a return-type other than void. */ 95: 96: extern int warn_return_type; 97: 98: /* Nonzero means warn about pointer casts that increase the required 99: alignment of the target type (and might therefore lead to a crash 100: due to a misaligned access). */ 101: 102: extern int warn_cast_align; 103: 1.1.1.5 root 104: /* Nonzero means warn that dbx info for template class methods isn't fully 105: supported yet. */ 106: 107: extern int warn_template_debugging; 108: 1.1 root 109: /* Nonzero means warn about any identifiers that match in the first N 110: characters. The value N is in `id_clash_len'. */ 111: 112: extern int warn_id_clash; 1.1.1.7 root 113: extern unsigned id_clash_len; 114: 115: /* Nonzero means warn about any objects definitions whose size is larger 116: than N bytes. Also want about function definitions whose returned 117: values are larger than N bytes. The value N is in `larger_than_size'. */ 118: 119: extern int warn_larger_than; 120: extern unsigned larger_than_size; 1.1 root 121: 122: /* Warn if a function returns an aggregate, 123: since there are often incompatible calling conventions for doing this. */ 124: 125: extern int warn_aggregate_return; 126: 127: /* Nonzero if generating code to do profiling. */ 128: 129: extern int profile_flag; 130: 131: /* Nonzero if generating code to do profiling on the basis of basic blocks. */ 132: 133: extern int profile_block_flag; 134: 135: /* Nonzero for -pedantic switch: warn about anything 136: that standard C forbids. */ 137: 138: extern int pedantic; 139: 140: /* Temporarily suppress certain warnings. 141: This is set while reading code from a system header file. */ 142: 143: extern int in_system_header; 144: 145: /* Nonzero for -dp: annotate the assembly with a comment describing the 146: pattern and alternative used. */ 147: 148: extern int flag_print_asm_name; 149: 150: /* Now the symbols that are set with `-f' switches. */ 151: 152: /* Nonzero means `char' should be signed. */ 153: 154: extern int flag_signed_char; 155: 156: /* Nonzero means give an enum type only as many bytes as it needs. */ 157: 158: extern int flag_short_enums; 159: 160: /* Nonzero for -fcaller-saves: allocate values in regs that need to 161: be saved across function calls, if that produces overall better code. 162: Optional now, so people can test it. */ 163: 164: extern int flag_caller_saves; 165: 166: /* Nonzero for -fpcc-struct-return: return values the same way PCC does. */ 167: 168: extern int flag_pcc_struct_return; 169: 170: /* Nonzero for -fforce-mem: load memory value into a register 171: before arithmetic on it. This makes better cse but slower compilation. */ 172: 173: extern int flag_force_mem; 174: 175: /* Nonzero for -fforce-addr: load memory address into a register before 176: reference to memory. This makes better cse but slower compilation. */ 177: 178: extern int flag_force_addr; 179: 180: /* Nonzero for -fdefer-pop: don't pop args after each function call; 181: instead save them up to pop many calls' args with one insns. */ 182: 183: extern int flag_defer_pop; 184: 185: /* Nonzero for -ffloat-store: don't allocate floats and doubles 186: in extended-precision registers. */ 187: 188: extern int flag_float_store; 189: 190: /* Nonzero enables strength-reduction in loop.c. */ 191: 192: extern int flag_strength_reduce; 193: 194: /* Nonzero enables loop unrolling in unroll.c. Only loops for which the 195: number of iterations can be calculated at compile-time (UNROLL_COMPLETELY, 196: UNROLL_MODULO) or at run-time (preconditioned to be UNROLL_MODULO) are 197: unrolled. */ 198: 199: extern int flag_unroll_loops; 200: 201: /* Nonzero enables loop unrolling in unroll.c. All loops are unrolled. 202: This is generally not a win. */ 203: 204: extern int flag_unroll_all_loops; 205: 206: /* Nonzero for -fcse-follow-jumps: 207: have cse follow jumps to do a more extensive job. */ 208: 209: extern int flag_cse_follow_jumps; 210: 1.1.1.3 root 211: /* Nonzero for -fcse-skip-blocks: 212: have cse follow a branch around a block. */ 213: 214: extern int flag_cse_skip_blocks; 215: 1.1 root 216: /* Nonzero for -fexpensive-optimizations: 217: perform miscellaneous relatively-expensive optimizations. */ 218: extern int flag_expensive_optimizations; 219: 220: /* Nonzero for -fwritable-strings: 221: store string constants in data segment and don't uniquize them. */ 222: 223: extern int flag_writable_strings; 224: 225: /* Nonzero means don't put addresses of constant functions in registers. 226: Used for compiling the Unix kernel, where strange substitutions are 227: done on the assembly output. */ 228: 229: extern int flag_no_function_cse; 230: 231: /* Nonzero for -fomit-frame-pointer: 232: don't make a frame pointer in simple functions that don't require one. */ 233: 234: extern int flag_omit_frame_pointer; 235: 236: /* Nonzero to inhibit use of define_optimization peephole opts. */ 237: 238: extern int flag_no_peephole; 239: 240: /* Nonzero means all references through pointers are volatile. */ 241: 242: extern int flag_volatile; 243: 1.1.1.5 root 244: /* Nonzero means treat all global and extern variables as global. */ 245: 246: extern int flag_volatile_global; 247: 1.1.1.3 root 248: /* Nonzero allows GCC to violate some IEEE or ANSI rules regarding math 249: operations in the interest of optimization. For example it allows 250: GCC to assume arguments to sqrt are nonnegative numbers, allowing 251: faster code for sqrt to be generated. */ 252: 253: extern int flag_fast_math; 254: 1.1 root 255: /* Nonzero means make functions that look like good inline candidates 256: go inline. */ 257: 258: extern int flag_inline_functions; 259: 260: /* Nonzero for -fkeep-inline-functions: even if we make a function 1.1.1.5 root 261: go inline everywhere, keep its definition around for debugging 1.1 root 262: purposes. */ 263: 264: extern int flag_keep_inline_functions; 265: 266: /* Nonzero means that functions declared `inline' will be treated 267: as `static'. Prevents generation of zillions of copies of unused 268: static inline functions; instead, `inlines' are written out 269: only when actually used. Used in conjunction with -g. Also 270: does the right thing with #pragma interface. */ 271: 272: extern int flag_no_inline; 273: 274: /* Nonzero if we are only using compiler to check syntax errors. */ 275: 276: extern int flag_syntax_only; 277: 1.1.1.2 root 278: /* Nonzero means we should save auxiliary info into a .X file. */ 1.1 root 279: 280: extern int flag_gen_aux_info; 281: 282: /* Nonzero means make the text shared if supported. */ 283: 284: extern int flag_shared_data; 285: 286: /* flag_schedule_insns means schedule insns within basic blocks (before 287: local_alloc). 288: flag_schedule_insns_after_reload means schedule insns after 289: global_alloc. */ 290: 291: extern int flag_schedule_insns; 292: extern int flag_schedule_insns_after_reload; 293: 294: /* Nonzero means put things in delayed-branch slots if supported. */ 295: 296: extern int flag_delayed_branch; 297: 1.1.1.7 root 298: /* Nonzero means to run cleanups after CALL_EXPRs. */ 299: 300: extern int flag_short_temps; 301: 1.1 root 302: /* Nonzero means pretend it is OK to examine bits of target floats, 303: even if that isn't true. The resulting code will have incorrect constants, 304: but the same series of instructions that the native compiler would make. */ 305: 306: extern int flag_pretend_float; 307: 308: /* Nonzero means change certain warnings into errors. 309: Usually these are warnings about failure to conform to some standard. */ 310: 311: extern int flag_pedantic_errors; 312: 313: /* Nonzero means generate position-independent code. 314: This is not fully implemented yet. */ 315: 316: extern int flag_pic; 317: 318: /* Nonzero means place uninitialized global data in the bss section. */ 319: 320: extern int flag_no_common; 321: 322: /* -finhibit-size-directive inhibits output of .size for ELF. 323: This is used only for compiling crtstuff.c, 324: and it may be extended to other effects 325: needed for crtstuff.c on other systems. */ 326: extern int flag_inhibit_size_directive; 327: 1.1.1.3 root 328: /* -fverbose-asm causes extra commentary information to be produced in 329: the generated assembly code (to make it more readable). This option 330: is generally only of use to those who actually need to read the 331: generated assembly code (perhaps while debugging the compiler itself). */ 332: 333: extern int flag_verbose_asm; 334: 1.1 root 335: /* -fgnu-linker specifies use of the GNU linker for initializations. 336: -fno-gnu-linker says that collect will be used. */ 337: extern int flag_gnu_linker; 1.1.1.8 ! root 338: ! 339: /* Tag all structures with __attribute__(packed) */ ! 340: extern int flag_pack_struct; 1.1 root 341: 342: /* Other basic status info about current function. */ 343: 344: /* Nonzero means current function must be given a frame pointer. 345: Set in stmt.c if anything is allocated on the stack there. 346: Set in reload1.c if anything is allocated on the stack there. */ 347: 348: extern int frame_pointer_needed; 349: 350: /* Set nonzero if jump_optimize finds that control falls through 351: at the end of the function. */ 352: 353: extern int can_reach_end; 354: 355: /* Nonzero if function being compiled receives nonlocal gotos 356: from nested functions. */ 357: 358: extern int current_function_has_nonlocal_label; 359: 1.1.1.6 root 360: /* Nonzero if function being compiled has nonlocal gotos to parent 361: function. */ 362: 363: extern int current_function_has_nonlocal_goto;
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