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Richard Stallman
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312
gcc/flags.h
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312
gcc/flags.h
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/* Compilation switch flag definitions for GNU CC.
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Copyright (C) 1987, 1988 Free Software Foundation, Inc.
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This file is part of GNU CC.
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GNU CC is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU CC is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU CC; see the file COPYING. If not, write to
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the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
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/* Name of the input .c file being compiled. */
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extern char *main_input_filename;
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enum debug_info_type
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{
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NO_DEBUG, /* Write no debug info. */
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DBX_DEBUG, /* Write BSD .stabs for DBX (using dbxout.c). */
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SDB_DEBUG, /* Write COFF for (old) SDB (using sdbout.c). */
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DWARF_DEBUG /* Write Dwarf debug info (using dwarfout.c). */
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};
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/* Specify which kind of debugging info to generate. */
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extern enum debug_info_type write_symbols;
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enum debug_info_level
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{
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DINFO_LEVEL_NONE, /* Write no debugging info. */
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DINFO_LEVEL_TERSE, /* Write minimal info to support tracebacks only. */
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DINFO_LEVEL_NORMAL, /* Write info for all declarations (and line table). */
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DINFO_LEVEL_VERBOSE /* Write normal info plus #define/#undef info. */
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};
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/* Specify how much debugging info to generate. */
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extern enum debug_info_level debug_info_level;
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#ifdef DBX_DEBUGGING_INFO
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/* Nonzero means use GDB-only extensions of DBX format. */
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extern int use_gdb_dbx_extensions;
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#endif
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/* Nonzero means do optimizations. -opt. */
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extern int optimize;
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/* Nonzero means do stupid register allocation. -noreg.
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Currently, this is 1 if `optimize' is 0. */
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extern int obey_regdecls;
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/* Don't print functions as they are compiled and don't print
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times taken by the various passes. -quiet. */
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extern int quiet_flag;
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/* Don't print warning messages. -w. */
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extern int inhibit_warnings;
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/* Do print extra warnings (such as for uninitialized variables). -W. */
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extern int extra_warnings;
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/* Nonzero to warn about unused local variables. */
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extern int warn_unused;
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/* Nonzero to warn about variables used before they are initialized. */
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extern int warn_uninitialized;
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/* Nonzero means warn about all declarations which shadow others. */
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extern int warn_shadow;
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/* Warn if a switch on an enum fails to have a case for every enum value. */
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extern int warn_switch;
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/* Nonzero means warn about function definitions that default the return type
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or that use a null return and have a return-type other than void. */
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extern int warn_return_type;
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/* Nonzero means warn about pointer casts that increase the required
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alignment of the target type (and might therefore lead to a crash
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due to a misaligned access). */
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extern int warn_cast_align;
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/* Nonzero means warn about any identifiers that match in the first N
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characters. The value N is in `id_clash_len'. */
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extern int warn_id_clash;
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extern int id_clash_len;
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/* Warn if a function returns an aggregate,
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since there are often incompatible calling conventions for doing this. */
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extern int warn_aggregate_return;
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/* Nonzero if generating code to do profiling. */
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extern int profile_flag;
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/* Nonzero if generating code to do profiling on the basis of basic blocks. */
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extern int profile_block_flag;
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/* Nonzero for -pedantic switch: warn about anything
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that standard C forbids. */
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extern int pedantic;
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/* Temporarily suppress certain warnings.
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This is set while reading code from a system header file. */
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extern int in_system_header;
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/* Nonzero for -dp: annotate the assembly with a comment describing the
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pattern and alternative used. */
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extern int flag_print_asm_name;
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/* Now the symbols that are set with `-f' switches. */
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/* Nonzero means `char' should be signed. */
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extern int flag_signed_char;
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/* Nonzero means give an enum type only as many bytes as it needs. */
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extern int flag_short_enums;
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/* Nonzero for -fcaller-saves: allocate values in regs that need to
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be saved across function calls, if that produces overall better code.
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Optional now, so people can test it. */
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extern int flag_caller_saves;
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/* Nonzero for -fpcc-struct-return: return values the same way PCC does. */
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extern int flag_pcc_struct_return;
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/* Nonzero for -fforce-mem: load memory value into a register
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before arithmetic on it. This makes better cse but slower compilation. */
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extern int flag_force_mem;
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/* Nonzero for -fforce-addr: load memory address into a register before
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reference to memory. This makes better cse but slower compilation. */
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extern int flag_force_addr;
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/* Nonzero for -fdefer-pop: don't pop args after each function call;
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instead save them up to pop many calls' args with one insns. */
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extern int flag_defer_pop;
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/* Nonzero for -ffloat-store: don't allocate floats and doubles
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in extended-precision registers. */
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extern int flag_float_store;
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/* Nonzero enables strength-reduction in loop.c. */
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extern int flag_strength_reduce;
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/* Nonzero enables loop unrolling in unroll.c. Only loops for which the
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number of iterations can be calculated at compile-time (UNROLL_COMPLETELY,
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UNROLL_MODULO) or at run-time (preconditioned to be UNROLL_MODULO) are
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unrolled. */
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extern int flag_unroll_loops;
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/* Nonzero enables loop unrolling in unroll.c. All loops are unrolled.
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This is generally not a win. */
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extern int flag_unroll_all_loops;
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/* Nonzero for -fcse-follow-jumps:
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have cse follow jumps to do a more extensive job. */
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extern int flag_cse_follow_jumps;
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/* Nonzero for -fexpensive-optimizations:
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perform miscellaneous relatively-expensive optimizations. */
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extern int flag_expensive_optimizations;
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/* Nonzero for -fwritable-strings:
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store string constants in data segment and don't uniquize them. */
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extern int flag_writable_strings;
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/* Nonzero means don't put addresses of constant functions in registers.
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Used for compiling the Unix kernel, where strange substitutions are
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done on the assembly output. */
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extern int flag_no_function_cse;
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/* Nonzero for -fomit-frame-pointer:
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don't make a frame pointer in simple functions that don't require one. */
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extern int flag_omit_frame_pointer;
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/* Nonzero to inhibit use of define_optimization peephole opts. */
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extern int flag_no_peephole;
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/* Nonzero means all references through pointers are volatile. */
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extern int flag_volatile;
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/* Nonzero means make functions that look like good inline candidates
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go inline. */
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extern int flag_inline_functions;
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/* Nonzero for -fkeep-inline-functions: even if we make a function
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go inline everywhere, keep its defintion around for debugging
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purposes. */
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extern int flag_keep_inline_functions;
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/* Nonzero means that functions declared `inline' will be treated
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as `static'. Prevents generation of zillions of copies of unused
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static inline functions; instead, `inlines' are written out
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only when actually used. Used in conjunction with -g. Also
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does the right thing with #pragma interface. */
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extern int flag_no_inline;
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/* Nonzero if we are only using compiler to check syntax errors. */
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extern int flag_syntax_only;
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/* Nonzero means we should save auxilliary info into a .X file. */
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extern int flag_gen_aux_info;
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/* Nonzero means make the text shared if supported. */
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extern int flag_shared_data;
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/* flag_schedule_insns means schedule insns within basic blocks (before
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local_alloc).
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flag_schedule_insns_after_reload means schedule insns after
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global_alloc. */
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extern int flag_schedule_insns;
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extern int flag_schedule_insns_after_reload;
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/* Nonzero means put things in delayed-branch slots if supported. */
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extern int flag_delayed_branch;
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/* Nonzero means pretend it is OK to examine bits of target floats,
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even if that isn't true. The resulting code will have incorrect constants,
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but the same series of instructions that the native compiler would make. */
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extern int flag_pretend_float;
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/* Nonzero means change certain warnings into errors.
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Usually these are warnings about failure to conform to some standard. */
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extern int flag_pedantic_errors;
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/* Nonzero means generate position-independent code.
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This is not fully implemented yet. */
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extern int flag_pic;
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/* Nonzero means place uninitialized global data in the bss section. */
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extern int flag_no_common;
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/* -finhibit-size-directive inhibits output of .size for ELF.
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This is used only for compiling crtstuff.c,
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and it may be extended to other effects
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needed for crtstuff.c on other systems. */
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extern int flag_inhibit_size_directive;
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/* -fgnu-linker specifies use of the GNU linker for initializations.
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-fno-gnu-linker says that collect will be used. */
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extern int flag_gnu_linker;
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/* Other basic status info about current function. */
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/* Nonzero means current function must be given a frame pointer.
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Set in stmt.c if anything is allocated on the stack there.
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Set in reload1.c if anything is allocated on the stack there. */
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extern int frame_pointer_needed;
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/* Set nonzero if jump_optimize finds that control falls through
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at the end of the function. */
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extern int can_reach_end;
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/* Nonzero if function being compiled receives nonlocal gotos
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from nested functions. */
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extern int current_function_has_nonlocal_label;
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