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