1518 lines
37 KiB
C
1518 lines
37 KiB
C
/* C/ObjC/C++ command line option handling.
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Copyright (C) 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
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Contributed by Neil Booth.
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 2, or (at your option) any later
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version.
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GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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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 GCC; see the file COPYING. If not, write to the Free
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Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301, USA. */
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#include "config.h"
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#include "system.h"
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#include "coretypes.h"
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#include "tm.h"
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#include "tree.h"
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#include "c-common.h"
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#include "c-pragma.h"
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#include "flags.h"
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#include "toplev.h"
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#include "langhooks.h"
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#include "tree-inline.h"
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#include "diagnostic.h"
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#include "intl.h"
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#include "cppdefault.h"
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#include "c-incpath.h"
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#include "debug.h" /* For debug_hooks. */
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#include "opts.h"
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#include "options.h"
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#include "mkdeps.h"
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#ifndef DOLLARS_IN_IDENTIFIERS
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# define DOLLARS_IN_IDENTIFIERS true
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#endif
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#ifndef TARGET_SYSTEM_ROOT
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# define TARGET_SYSTEM_ROOT NULL
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#endif
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#ifndef TARGET_OPTF
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#define TARGET_OPTF(ARG)
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#endif
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/* CPP's options. */
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static cpp_options *cpp_opts;
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/* Input filename. */
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static const char *this_input_filename;
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/* Filename and stream for preprocessed output. */
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static const char *out_fname;
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static FILE *out_stream;
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/* Append dependencies to deps_file. */
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static bool deps_append;
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/* If dependency switches (-MF etc.) have been given. */
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static bool deps_seen;
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/* If -v seen. */
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static bool verbose;
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/* If -lang-fortran seen. */
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static bool lang_fortran = false;
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/* Dependency output file. */
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static const char *deps_file;
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/* The prefix given by -iprefix, if any. */
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static const char *iprefix;
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/* The system root, if any. Overridden by -isysroot. */
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static const char *sysroot = TARGET_SYSTEM_ROOT;
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/* Zero disables all standard directories for headers. */
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static bool std_inc = true;
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/* Zero disables the C++-specific standard directories for headers. */
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static bool std_cxx_inc = true;
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/* If the quote chain has been split by -I-. */
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static bool quote_chain_split;
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/* If -Wunused-macros. */
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static bool warn_unused_macros;
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/* If -Wvariadic-macros. */
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static bool warn_variadic_macros = true;
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/* Number of deferred options. */
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static size_t deferred_count;
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/* Number of deferred options scanned for -include. */
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static size_t include_cursor;
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static void set_Wimplicit (int);
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static void handle_OPT_d (const char *);
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static void set_std_cxx98 (int);
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static void set_std_c89 (int, int);
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static void set_std_c99 (int);
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static void check_deps_environment_vars (void);
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static void handle_deferred_opts (void);
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static void sanitize_cpp_opts (void);
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static void add_prefixed_path (const char *, size_t);
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static void push_command_line_include (void);
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static void cb_file_change (cpp_reader *, const struct line_map *);
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static void cb_dir_change (cpp_reader *, const char *);
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static void finish_options (void);
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#ifndef STDC_0_IN_SYSTEM_HEADERS
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#define STDC_0_IN_SYSTEM_HEADERS 0
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#endif
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/* Holds switches parsed by c_common_handle_option (), but whose
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handling is deferred to c_common_post_options (). */
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static void defer_opt (enum opt_code, const char *);
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static struct deferred_opt
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{
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enum opt_code code;
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const char *arg;
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} *deferred_opts;
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/* Complain that switch CODE expects an argument but none was
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provided. OPT was the command-line option. Return FALSE to get
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the default message in opts.c, TRUE if we provide a specialized
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one. */
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bool
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c_common_missing_argument (const char *opt, size_t code)
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{
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switch (code)
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{
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default:
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/* Pick up the default message. */
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return false;
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case OPT_fconstant_string_class_:
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error ("no class name specified with %qs", opt);
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break;
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case OPT_A:
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error ("assertion missing after %qs", opt);
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break;
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case OPT_D:
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case OPT_U:
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error ("macro name missing after %qs", opt);
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break;
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case OPT_cxx_isystem:
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case OPT_F:
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case OPT_I:
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case OPT_idirafter:
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case OPT_isysroot:
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case OPT_isystem:
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case OPT_iquote:
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error ("missing path after %qs", opt);
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break;
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case OPT_MF:
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case OPT_MD:
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case OPT_MMD:
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case OPT_include:
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case OPT_imacros:
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case OPT_o:
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error ("missing filename after %qs", opt);
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break;
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case OPT_MQ:
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case OPT_MT:
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error ("missing makefile target after %qs", opt);
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break;
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}
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return true;
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}
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/* Defer option CODE with argument ARG. */
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static void
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defer_opt (enum opt_code code, const char *arg)
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{
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deferred_opts[deferred_count].code = code;
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deferred_opts[deferred_count].arg = arg;
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deferred_count++;
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}
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/* Common initialization before parsing options. */
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unsigned int
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c_common_init_options (unsigned int argc, const char **argv)
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{
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static const unsigned int lang_flags[] = {CL_C, CL_ObjC, CL_CXX, CL_ObjCXX};
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unsigned int i, result;
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/* This is conditionalized only because that is the way the front
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ends used to do it. Maybe this should be unconditional? */
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if (c_dialect_cxx ())
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{
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/* By default wrap lines at 80 characters. Is getenv
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("COLUMNS") preferable? */
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diagnostic_line_cutoff (global_dc) = 80;
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/* By default, emit location information once for every
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diagnostic message. */
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diagnostic_prefixing_rule (global_dc) = DIAGNOSTICS_SHOW_PREFIX_ONCE;
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}
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parse_in = cpp_create_reader (c_dialect_cxx () ? CLK_GNUCXX: CLK_GNUC89,
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ident_hash, &line_table);
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cpp_opts = cpp_get_options (parse_in);
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cpp_opts->dollars_in_ident = DOLLARS_IN_IDENTIFIERS;
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cpp_opts->objc = c_dialect_objc ();
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/* Reset to avoid warnings on internal definitions. We set it just
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before passing on command-line options to cpplib. */
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cpp_opts->warn_dollars = 0;
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flag_const_strings = c_dialect_cxx ();
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flag_exceptions = c_dialect_cxx ();
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warn_pointer_arith = c_dialect_cxx ();
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deferred_opts = XNEWVEC (struct deferred_opt, argc);
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result = lang_flags[c_language];
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if (c_language == clk_c)
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{
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/* If preprocessing assembly language, accept any of the C-family
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front end options since the driver may pass them through. */
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for (i = 1; i < argc; i++)
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if (! strcmp (argv[i], "-lang-asm"))
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{
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result |= CL_C | CL_ObjC | CL_CXX | CL_ObjCXX;
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break;
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}
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#ifdef CL_Fortran
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for (i = 1; i < argc; i++)
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if (! strcmp (argv[i], "-lang-fortran"))
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{
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result |= CL_Fortran;
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break;
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}
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#endif
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}
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return result;
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}
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/* Handle switch SCODE with argument ARG. VALUE is true, unless no-
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form of an -f or -W option was given. Returns 0 if the switch was
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invalid, a negative number to prevent language-independent
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processing in toplev.c (a hack necessary for the short-term). */
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int
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c_common_handle_option (size_t scode, const char *arg, int value)
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{
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const struct cl_option *option = &cl_options[scode];
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enum opt_code code = (enum opt_code) scode;
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int result = 1;
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switch (code)
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{
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default:
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if (cl_options[code].flags & (CL_C | CL_CXX | CL_ObjC | CL_ObjCXX))
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break;
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#ifdef CL_Fortran
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if (lang_fortran && (cl_options[code].flags & (CL_Fortran)))
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break;
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#endif
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result = 0;
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break;
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case OPT__output_pch_:
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pch_file = arg;
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break;
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case OPT_A:
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defer_opt (code, arg);
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break;
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case OPT_C:
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cpp_opts->discard_comments = 0;
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break;
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case OPT_CC:
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cpp_opts->discard_comments = 0;
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cpp_opts->discard_comments_in_macro_exp = 0;
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break;
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case OPT_D:
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defer_opt (code, arg);
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break;
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case OPT_E:
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flag_preprocess_only = 1;
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break;
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case OPT_H:
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cpp_opts->print_include_names = 1;
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break;
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case OPT_F:
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TARGET_OPTF (xstrdup (arg));
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break;
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case OPT_I:
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if (strcmp (arg, "-"))
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add_path (xstrdup (arg), BRACKET, 0, true);
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else
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{
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if (quote_chain_split)
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error ("-I- specified twice");
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quote_chain_split = true;
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split_quote_chain ();
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inform ("obsolete option -I- used, please use -iquote instead");
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}
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break;
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case OPT_M:
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case OPT_MM:
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/* When doing dependencies with -M or -MM, suppress normal
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preprocessed output, but still do -dM etc. as software
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depends on this. Preprocessed output does occur if -MD, -MMD
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or environment var dependency generation is used. */
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cpp_opts->deps.style = (code == OPT_M ? DEPS_SYSTEM: DEPS_USER);
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flag_no_output = 1;
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cpp_opts->inhibit_warnings = 1;
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break;
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case OPT_MD:
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case OPT_MMD:
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cpp_opts->deps.style = (code == OPT_MD ? DEPS_SYSTEM: DEPS_USER);
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deps_file = arg;
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break;
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case OPT_MF:
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deps_seen = true;
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deps_file = arg;
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break;
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case OPT_MG:
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deps_seen = true;
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cpp_opts->deps.missing_files = true;
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break;
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case OPT_MP:
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deps_seen = true;
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cpp_opts->deps.phony_targets = true;
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break;
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case OPT_MQ:
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case OPT_MT:
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deps_seen = true;
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defer_opt (code, arg);
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break;
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case OPT_P:
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flag_no_line_commands = 1;
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break;
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case OPT_fworking_directory:
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flag_working_directory = value;
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break;
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case OPT_U:
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defer_opt (code, arg);
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break;
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case OPT_Wall:
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set_Wunused (value);
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set_Wformat (value);
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set_Wimplicit (value);
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warn_char_subscripts = value;
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warn_missing_braces = value;
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warn_parentheses = value;
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warn_return_type = value;
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warn_sequence_point = value; /* Was C only. */
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if (c_dialect_cxx ())
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warn_sign_compare = value;
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warn_switch = value;
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warn_strict_aliasing = value;
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/* Only warn about unknown pragmas that are not in system
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headers. */
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warn_unknown_pragmas = value;
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/* We save the value of warn_uninitialized, since if they put
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-Wuninitialized on the command line, we need to generate a
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warning about not using it without also specifying -O. */
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if (warn_uninitialized != 1)
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warn_uninitialized = (value ? 2 : 0);
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if (!c_dialect_cxx ())
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/* We set this to 2 here, but 1 in -Wmain, so -ffreestanding
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can turn it off only if it's not explicit. */
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warn_main = value * 2;
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else
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{
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/* C++-specific warnings. */
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warn_nonvdtor = value;
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warn_reorder = value;
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warn_nontemplate_friend = value;
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}
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cpp_opts->warn_trigraphs = value;
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cpp_opts->warn_comments = value;
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cpp_opts->warn_num_sign_change = value;
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cpp_opts->warn_multichar = value; /* Was C++ only. */
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if (warn_pointer_sign == -1)
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warn_pointer_sign = 1;
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break;
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case OPT_Wcomment:
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case OPT_Wcomments:
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cpp_opts->warn_comments = value;
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break;
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case OPT_Wdeprecated:
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cpp_opts->warn_deprecated = value;
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break;
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case OPT_Wdiv_by_zero:
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warn_div_by_zero = value;
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break;
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case OPT_Wendif_labels:
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cpp_opts->warn_endif_labels = value;
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break;
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case OPT_Werror:
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cpp_opts->warnings_are_errors = value;
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global_dc->warning_as_error_requested = value;
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break;
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case OPT_Werror_implicit_function_declaration:
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mesg_implicit_function_declaration = 2;
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break;
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case OPT_Wformat:
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set_Wformat (value);
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break;
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case OPT_Wformat_:
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set_Wformat (atoi (arg));
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break;
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case OPT_Wimplicit:
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set_Wimplicit (value);
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break;
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case OPT_Wimport:
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/* Silently ignore for now. */
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break;
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case OPT_Winvalid_pch:
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cpp_opts->warn_invalid_pch = value;
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break;
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case OPT_Wmain:
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if (value)
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warn_main = 1;
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else
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warn_main = -1;
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break;
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case OPT_Wmissing_include_dirs:
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cpp_opts->warn_missing_include_dirs = value;
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break;
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case OPT_Wmultichar:
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cpp_opts->warn_multichar = value;
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break;
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case OPT_Wnormalized_:
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if (!value || (arg && strcasecmp (arg, "none") == 0))
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cpp_opts->warn_normalize = normalized_none;
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else if (!arg || strcasecmp (arg, "nfkc") == 0)
|
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cpp_opts->warn_normalize = normalized_KC;
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else if (strcasecmp (arg, "id") == 0)
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cpp_opts->warn_normalize = normalized_identifier_C;
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else if (strcasecmp (arg, "nfc") == 0)
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cpp_opts->warn_normalize = normalized_C;
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else
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error ("argument %qs to %<-Wnormalized%> not recognized", arg);
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break;
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case OPT_Wreturn_type:
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warn_return_type = value;
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break;
|
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|
|
case OPT_Wstrict_null_sentinel:
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warn_strict_null_sentinel = value;
|
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break;
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case OPT_Wsystem_headers:
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cpp_opts->warn_system_headers = value;
|
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break;
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case OPT_Wtraditional:
|
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cpp_opts->warn_traditional = value;
|
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break;
|
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|
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case OPT_Wtrigraphs:
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cpp_opts->warn_trigraphs = value;
|
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break;
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case OPT_Wundef:
|
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cpp_opts->warn_undef = value;
|
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break;
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|
|
case OPT_Wunknown_pragmas:
|
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/* Set to greater than 1, so that even unknown pragmas in
|
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system headers will be warned about. */
|
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warn_unknown_pragmas = value * 2;
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break;
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case OPT_Wunused_macros:
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warn_unused_macros = value;
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break;
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case OPT_Wvariadic_macros:
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warn_variadic_macros = value;
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break;
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case OPT_Wwrite_strings:
|
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if (!c_dialect_cxx ())
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flag_const_strings = value;
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else
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warn_write_strings = value;
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break;
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|
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case OPT_ansi:
|
|
if (!c_dialect_cxx ())
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set_std_c89 (false, true);
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else
|
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set_std_cxx98 (true);
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break;
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|
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case OPT_cxx_isystem:
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add_path (xstrdup (arg), SYSTEM, 1, true);
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break;
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case OPT_d:
|
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handle_OPT_d (arg);
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break;
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|
|
case OPT_fcond_mismatch:
|
|
if (!c_dialect_cxx ())
|
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{
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flag_cond_mismatch = value;
|
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break;
|
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}
|
|
/* Fall through. */
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|
|
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case OPT_fall_virtual:
|
|
case OPT_falt_external_templates:
|
|
case OPT_fenum_int_equiv:
|
|
case OPT_fexternal_templates:
|
|
case OPT_fguiding_decls:
|
|
case OPT_fhonor_std:
|
|
case OPT_fhuge_objects:
|
|
case OPT_flabels_ok:
|
|
case OPT_fname_mangling_version_:
|
|
case OPT_fnew_abi:
|
|
case OPT_fnonnull_objects:
|
|
case OPT_fsquangle:
|
|
case OPT_fstrict_prototype:
|
|
case OPT_fthis_is_variable:
|
|
case OPT_fvtable_thunks:
|
|
case OPT_fxref:
|
|
case OPT_fvtable_gc:
|
|
warning (0, "switch %qs is no longer supported", option->opt_text);
|
|
break;
|
|
|
|
case OPT_faccess_control:
|
|
flag_access_control = value;
|
|
break;
|
|
|
|
case OPT_fasm:
|
|
flag_no_asm = !value;
|
|
break;
|
|
|
|
case OPT_fbuiltin:
|
|
flag_no_builtin = !value;
|
|
break;
|
|
|
|
case OPT_fbuiltin_:
|
|
if (value)
|
|
result = 0;
|
|
else
|
|
disable_builtin_function (arg);
|
|
break;
|
|
|
|
case OPT_fdollars_in_identifiers:
|
|
cpp_opts->dollars_in_ident = value;
|
|
break;
|
|
|
|
case OPT_ffreestanding:
|
|
value = !value;
|
|
/* Fall through.... */
|
|
case OPT_fhosted:
|
|
flag_hosted = value;
|
|
flag_no_builtin = !value;
|
|
/* warn_main will be 2 if set by -Wall, 1 if set by -Wmain */
|
|
if (!value && warn_main == 2)
|
|
warn_main = 0;
|
|
break;
|
|
|
|
case OPT_fshort_double:
|
|
flag_short_double = value;
|
|
break;
|
|
|
|
case OPT_fshort_enums:
|
|
flag_short_enums = value;
|
|
break;
|
|
|
|
case OPT_fshort_wchar:
|
|
flag_short_wchar = value;
|
|
break;
|
|
|
|
case OPT_fsigned_bitfields:
|
|
flag_signed_bitfields = value;
|
|
break;
|
|
|
|
case OPT_fsigned_char:
|
|
flag_signed_char = value;
|
|
break;
|
|
|
|
case OPT_funsigned_bitfields:
|
|
flag_signed_bitfields = !value;
|
|
break;
|
|
|
|
case OPT_funsigned_char:
|
|
flag_signed_char = !value;
|
|
break;
|
|
|
|
case OPT_fcheck_new:
|
|
flag_check_new = value;
|
|
break;
|
|
|
|
case OPT_fconserve_space:
|
|
flag_conserve_space = value;
|
|
break;
|
|
|
|
case OPT_fconst_strings:
|
|
flag_const_strings = value;
|
|
break;
|
|
|
|
case OPT_fconstant_string_class_:
|
|
constant_string_class_name = arg;
|
|
break;
|
|
|
|
case OPT_fdefault_inline:
|
|
flag_default_inline = value;
|
|
break;
|
|
|
|
case OPT_felide_constructors:
|
|
flag_elide_constructors = value;
|
|
break;
|
|
|
|
case OPT_fenforce_eh_specs:
|
|
flag_enforce_eh_specs = value;
|
|
break;
|
|
|
|
case OPT_fextended_identifiers:
|
|
cpp_opts->extended_identifiers = value;
|
|
break;
|
|
|
|
case OPT_ffor_scope:
|
|
flag_new_for_scope = value;
|
|
break;
|
|
|
|
case OPT_fgnu_keywords:
|
|
flag_no_gnu_keywords = !value;
|
|
break;
|
|
|
|
case OPT_fgnu_runtime:
|
|
flag_next_runtime = !value;
|
|
break;
|
|
|
|
case OPT_fhandle_exceptions:
|
|
warning (0, "-fhandle-exceptions has been renamed -fexceptions (and is now on by default)");
|
|
flag_exceptions = value;
|
|
break;
|
|
|
|
case OPT_fimplement_inlines:
|
|
flag_implement_inlines = value;
|
|
break;
|
|
|
|
case OPT_fimplicit_inline_templates:
|
|
flag_implicit_inline_templates = value;
|
|
break;
|
|
|
|
case OPT_fimplicit_templates:
|
|
flag_implicit_templates = value;
|
|
break;
|
|
|
|
case OPT_fms_extensions:
|
|
flag_ms_extensions = value;
|
|
break;
|
|
|
|
case OPT_fnext_runtime:
|
|
flag_next_runtime = value;
|
|
break;
|
|
|
|
case OPT_fnil_receivers:
|
|
flag_nil_receivers = value;
|
|
break;
|
|
|
|
case OPT_fnonansi_builtins:
|
|
flag_no_nonansi_builtin = !value;
|
|
break;
|
|
|
|
case OPT_foperator_names:
|
|
cpp_opts->operator_names = value;
|
|
break;
|
|
|
|
case OPT_foptional_diags:
|
|
flag_optional_diags = value;
|
|
break;
|
|
|
|
case OPT_fpch_deps:
|
|
cpp_opts->restore_pch_deps = value;
|
|
break;
|
|
|
|
case OPT_fpch_preprocess:
|
|
flag_pch_preprocess = value;
|
|
break;
|
|
|
|
case OPT_fpermissive:
|
|
flag_permissive = value;
|
|
break;
|
|
|
|
case OPT_fpreprocessed:
|
|
cpp_opts->preprocessed = value;
|
|
break;
|
|
|
|
case OPT_freplace_objc_classes:
|
|
flag_replace_objc_classes = value;
|
|
break;
|
|
|
|
case OPT_frepo:
|
|
flag_use_repository = value;
|
|
if (value)
|
|
flag_implicit_templates = 0;
|
|
break;
|
|
|
|
case OPT_frtti:
|
|
flag_rtti = value;
|
|
break;
|
|
|
|
case OPT_fshow_column:
|
|
cpp_opts->show_column = value;
|
|
break;
|
|
|
|
case OPT_fstats:
|
|
flag_detailed_statistics = value;
|
|
break;
|
|
|
|
case OPT_ftabstop_:
|
|
/* It is documented that we silently ignore silly values. */
|
|
if (value >= 1 && value <= 100)
|
|
cpp_opts->tabstop = value;
|
|
break;
|
|
|
|
case OPT_fexec_charset_:
|
|
cpp_opts->narrow_charset = arg;
|
|
break;
|
|
|
|
case OPT_fwide_exec_charset_:
|
|
cpp_opts->wide_charset = arg;
|
|
break;
|
|
|
|
case OPT_finput_charset_:
|
|
cpp_opts->input_charset = arg;
|
|
break;
|
|
|
|
case OPT_ftemplate_depth_:
|
|
max_tinst_depth = value;
|
|
break;
|
|
|
|
case OPT_fuse_cxa_atexit:
|
|
flag_use_cxa_atexit = value;
|
|
break;
|
|
|
|
case OPT_fvisibility_inlines_hidden:
|
|
visibility_options.inlines_hidden = value;
|
|
break;
|
|
|
|
case OPT_fweak:
|
|
flag_weak = value;
|
|
break;
|
|
|
|
case OPT_fthreadsafe_statics:
|
|
flag_threadsafe_statics = value;
|
|
break;
|
|
|
|
case OPT_fzero_link:
|
|
flag_zero_link = value;
|
|
break;
|
|
|
|
case OPT_gen_decls:
|
|
flag_gen_declaration = 1;
|
|
break;
|
|
|
|
case OPT_idirafter:
|
|
add_path (xstrdup (arg), AFTER, 0, true);
|
|
break;
|
|
|
|
case OPT_imacros:
|
|
case OPT_include:
|
|
defer_opt (code, arg);
|
|
break;
|
|
|
|
case OPT_iprefix:
|
|
iprefix = arg;
|
|
break;
|
|
|
|
case OPT_iquote:
|
|
add_path (xstrdup (arg), QUOTE, 0, true);
|
|
break;
|
|
|
|
case OPT_isysroot:
|
|
sysroot = arg;
|
|
break;
|
|
|
|
case OPT_isystem:
|
|
add_path (xstrdup (arg), SYSTEM, 0, true);
|
|
break;
|
|
|
|
case OPT_iwithprefix:
|
|
add_prefixed_path (arg, SYSTEM);
|
|
break;
|
|
|
|
case OPT_iwithprefixbefore:
|
|
add_prefixed_path (arg, BRACKET);
|
|
break;
|
|
|
|
case OPT_lang_asm:
|
|
cpp_set_lang (parse_in, CLK_ASM);
|
|
cpp_opts->dollars_in_ident = false;
|
|
break;
|
|
|
|
case OPT_lang_fortran:
|
|
lang_fortran = true;
|
|
break;
|
|
|
|
case OPT_lang_objc:
|
|
cpp_opts->objc = 1;
|
|
break;
|
|
|
|
case OPT_nostdinc:
|
|
std_inc = false;
|
|
break;
|
|
|
|
case OPT_nostdinc__:
|
|
std_cxx_inc = false;
|
|
break;
|
|
|
|
case OPT_o:
|
|
if (!out_fname)
|
|
out_fname = arg;
|
|
else
|
|
error ("output filename specified twice");
|
|
break;
|
|
|
|
/* We need to handle the -pedantic switches here, rather than in
|
|
c_common_post_options, so that a subsequent -Wno-endif-labels
|
|
is not overridden. */
|
|
case OPT_pedantic_errors:
|
|
cpp_opts->pedantic_errors = 1;
|
|
/* Fall through. */
|
|
case OPT_pedantic:
|
|
cpp_opts->pedantic = 1;
|
|
cpp_opts->warn_endif_labels = 1;
|
|
if (warn_pointer_sign == -1)
|
|
warn_pointer_sign = 1;
|
|
break;
|
|
|
|
case OPT_print_objc_runtime_info:
|
|
print_struct_values = 1;
|
|
break;
|
|
|
|
case OPT_print_pch_checksum:
|
|
c_common_print_pch_checksum (stdout);
|
|
exit_after_options = true;
|
|
break;
|
|
|
|
case OPT_remap:
|
|
cpp_opts->remap = 1;
|
|
break;
|
|
|
|
case OPT_std_c__98:
|
|
case OPT_std_gnu__98:
|
|
set_std_cxx98 (code == OPT_std_c__98 /* ISO */);
|
|
break;
|
|
|
|
case OPT_std_c89:
|
|
case OPT_std_iso9899_1990:
|
|
case OPT_std_iso9899_199409:
|
|
set_std_c89 (code == OPT_std_iso9899_199409 /* c94 */, true /* ISO */);
|
|
break;
|
|
|
|
case OPT_std_gnu89:
|
|
set_std_c89 (false /* c94 */, false /* ISO */);
|
|
break;
|
|
|
|
case OPT_std_c99:
|
|
case OPT_std_c9x:
|
|
case OPT_std_iso9899_1999:
|
|
case OPT_std_iso9899_199x:
|
|
set_std_c99 (true /* ISO */);
|
|
break;
|
|
|
|
case OPT_std_gnu99:
|
|
case OPT_std_gnu9x:
|
|
set_std_c99 (false /* ISO */);
|
|
break;
|
|
|
|
case OPT_trigraphs:
|
|
cpp_opts->trigraphs = 1;
|
|
break;
|
|
|
|
case OPT_traditional_cpp:
|
|
cpp_opts->traditional = 1;
|
|
break;
|
|
|
|
case OPT_undef:
|
|
flag_undef = 1;
|
|
break;
|
|
|
|
case OPT_w:
|
|
cpp_opts->inhibit_warnings = 1;
|
|
break;
|
|
|
|
case OPT_v:
|
|
verbose = true;
|
|
break;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
/* Post-switch processing. */
|
|
bool
|
|
c_common_post_options (const char **pfilename)
|
|
{
|
|
struct cpp_callbacks *cb;
|
|
|
|
/* Canonicalize the input and output filenames. */
|
|
if (in_fnames == NULL)
|
|
{
|
|
in_fnames = XNEWVEC (const char *, 1);
|
|
in_fnames[0] = "";
|
|
}
|
|
else if (strcmp (in_fnames[0], "-") == 0)
|
|
in_fnames[0] = "";
|
|
|
|
if (out_fname == NULL || !strcmp (out_fname, "-"))
|
|
out_fname = "";
|
|
|
|
if (cpp_opts->deps.style == DEPS_NONE)
|
|
check_deps_environment_vars ();
|
|
|
|
handle_deferred_opts ();
|
|
|
|
sanitize_cpp_opts ();
|
|
|
|
register_include_chains (parse_in, sysroot, iprefix,
|
|
std_inc, std_cxx_inc && c_dialect_cxx (), verbose);
|
|
|
|
flag_inline_trees = 1;
|
|
|
|
/* Use tree inlining. */
|
|
if (!flag_no_inline)
|
|
flag_no_inline = 1;
|
|
if (flag_inline_functions)
|
|
flag_inline_trees = 2;
|
|
|
|
/* If we are given more than one input file, we must use
|
|
unit-at-a-time mode. */
|
|
if (num_in_fnames > 1)
|
|
flag_unit_at_a_time = 1;
|
|
|
|
/* Default to ObjC sjlj exception handling if NeXT runtime. */
|
|
if (flag_objc_sjlj_exceptions < 0)
|
|
flag_objc_sjlj_exceptions = flag_next_runtime;
|
|
if (flag_objc_exceptions && !flag_objc_sjlj_exceptions)
|
|
flag_exceptions = 1;
|
|
|
|
/* -Wextra implies -Wsign-compare and -Wmissing-field-initializers,
|
|
but not if explicitly overridden. */
|
|
if (warn_sign_compare == -1)
|
|
warn_sign_compare = extra_warnings;
|
|
if (warn_missing_field_initializers == -1)
|
|
warn_missing_field_initializers = extra_warnings;
|
|
|
|
/* -Wpointer_sign is disabled by default, but it is enabled if any
|
|
of -Wall or -pedantic are given. */
|
|
if (warn_pointer_sign == -1)
|
|
warn_pointer_sign = 0;
|
|
|
|
/* Special format checking options don't work without -Wformat; warn if
|
|
they are used. */
|
|
if (!warn_format)
|
|
{
|
|
warning (OPT_Wformat_y2k,
|
|
"-Wformat-y2k ignored without -Wformat");
|
|
warning (OPT_Wformat_extra_args,
|
|
"-Wformat-extra-args ignored without -Wformat");
|
|
warning (OPT_Wformat_zero_length,
|
|
"-Wformat-zero-length ignored without -Wformat");
|
|
warning (OPT_Wformat_nonliteral,
|
|
"-Wformat-nonliteral ignored without -Wformat");
|
|
warning (OPT_Wformat_security,
|
|
"-Wformat-security ignored without -Wformat");
|
|
}
|
|
|
|
/* C99 requires special handling of complex multiplication and division;
|
|
-ffast-math and -fcx-limited-range are handled in process_options. */
|
|
if (flag_isoc99)
|
|
flag_complex_method = 2;
|
|
|
|
if (flag_preprocess_only)
|
|
{
|
|
/* Open the output now. We must do so even if flag_no_output is
|
|
on, because there may be other output than from the actual
|
|
preprocessing (e.g. from -dM). */
|
|
if (out_fname[0] == '\0')
|
|
out_stream = stdout;
|
|
else
|
|
out_stream = fopen (out_fname, "w");
|
|
|
|
if (out_stream == NULL)
|
|
{
|
|
fatal_error ("opening output file %s: %m", out_fname);
|
|
return false;
|
|
}
|
|
|
|
if (num_in_fnames > 1)
|
|
error ("too many filenames given. Type %s --help for usage",
|
|
progname);
|
|
|
|
init_pp_output (out_stream);
|
|
}
|
|
else
|
|
{
|
|
init_c_lex ();
|
|
|
|
/* Yuk. WTF is this? I do know ObjC relies on it somewhere. */
|
|
input_location = UNKNOWN_LOCATION;
|
|
}
|
|
|
|
cb = cpp_get_callbacks (parse_in);
|
|
cb->file_change = cb_file_change;
|
|
cb->dir_change = cb_dir_change;
|
|
cpp_post_options (parse_in);
|
|
|
|
input_location = UNKNOWN_LOCATION;
|
|
|
|
/* If an error has occurred in cpplib, note it so we fail
|
|
immediately. */
|
|
errorcount += cpp_errors (parse_in);
|
|
|
|
*pfilename = this_input_filename
|
|
= cpp_read_main_file (parse_in, in_fnames[0]);
|
|
/* Don't do any compilation or preprocessing if there is no input file. */
|
|
if (this_input_filename == NULL)
|
|
{
|
|
errorcount++;
|
|
return false;
|
|
}
|
|
|
|
if (flag_working_directory
|
|
&& flag_preprocess_only && !flag_no_line_commands)
|
|
pp_dir_change (parse_in, get_src_pwd ());
|
|
|
|
return flag_preprocess_only;
|
|
}
|
|
|
|
/* Front end initialization common to C, ObjC and C++. */
|
|
bool
|
|
c_common_init (void)
|
|
{
|
|
/* Set up preprocessor arithmetic. Must be done after call to
|
|
c_common_nodes_and_builtins for type nodes to be good. */
|
|
cpp_opts->precision = TYPE_PRECISION (intmax_type_node);
|
|
cpp_opts->char_precision = TYPE_PRECISION (char_type_node);
|
|
cpp_opts->int_precision = TYPE_PRECISION (integer_type_node);
|
|
cpp_opts->wchar_precision = TYPE_PRECISION (wchar_type_node);
|
|
cpp_opts->unsigned_wchar = TYPE_UNSIGNED (wchar_type_node);
|
|
cpp_opts->bytes_big_endian = BYTES_BIG_ENDIAN;
|
|
|
|
/* This can't happen until after wchar_precision and bytes_big_endian
|
|
are known. */
|
|
cpp_init_iconv (parse_in);
|
|
|
|
if (version_flag)
|
|
c_common_print_pch_checksum (stderr);
|
|
|
|
if (flag_preprocess_only)
|
|
{
|
|
finish_options ();
|
|
preprocess_file (parse_in);
|
|
return false;
|
|
}
|
|
|
|
/* Has to wait until now so that cpplib has its hash table. */
|
|
init_pragma ();
|
|
|
|
return true;
|
|
}
|
|
|
|
/* Initialize the integrated preprocessor after debug output has been
|
|
initialized; loop over each input file. */
|
|
void
|
|
c_common_parse_file (int set_yydebug)
|
|
{
|
|
unsigned int i;
|
|
|
|
/* Enable parser debugging, if requested and we can. If requested
|
|
and we can't, notify the user. */
|
|
#if YYDEBUG != 0
|
|
yydebug = set_yydebug;
|
|
#else
|
|
if (set_yydebug)
|
|
warning (0, "YYDEBUG was not defined at build time, -dy ignored");
|
|
#endif
|
|
|
|
i = 0;
|
|
for (;;)
|
|
{
|
|
/* Start the main input file, if the debug writer wants it. */
|
|
if (debug_hooks->start_end_main_source_file)
|
|
(*debug_hooks->start_source_file) (0, this_input_filename);
|
|
finish_options ();
|
|
pch_init ();
|
|
push_file_scope ();
|
|
c_parse_file ();
|
|
finish_file ();
|
|
pop_file_scope ();
|
|
/* And end the main input file, if the debug writer wants it */
|
|
if (debug_hooks->start_end_main_source_file)
|
|
(*debug_hooks->end_source_file) (0);
|
|
if (++i >= num_in_fnames)
|
|
break;
|
|
cpp_undef_all (parse_in);
|
|
this_input_filename
|
|
= cpp_read_main_file (parse_in, in_fnames[i]);
|
|
/* If an input file is missing, abandon further compilation.
|
|
cpplib has issued a diagnostic. */
|
|
if (!this_input_filename)
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* Common finish hook for the C, ObjC and C++ front ends. */
|
|
void
|
|
c_common_finish (void)
|
|
{
|
|
FILE *deps_stream = NULL;
|
|
|
|
if (cpp_opts->deps.style != DEPS_NONE)
|
|
{
|
|
/* If -M or -MM was seen without -MF, default output to the
|
|
output stream. */
|
|
if (!deps_file)
|
|
deps_stream = out_stream;
|
|
else
|
|
{
|
|
deps_stream = fopen (deps_file, deps_append ? "a": "w");
|
|
if (!deps_stream)
|
|
fatal_error ("opening dependency file %s: %m", deps_file);
|
|
}
|
|
}
|
|
|
|
/* For performance, avoid tearing down cpplib's internal structures
|
|
with cpp_destroy (). */
|
|
errorcount += cpp_finish (parse_in, deps_stream);
|
|
|
|
if (deps_stream && deps_stream != out_stream
|
|
&& (ferror (deps_stream) || fclose (deps_stream)))
|
|
fatal_error ("closing dependency file %s: %m", deps_file);
|
|
|
|
if (out_stream && (ferror (out_stream) || fclose (out_stream)))
|
|
fatal_error ("when writing output to %s: %m", out_fname);
|
|
}
|
|
|
|
/* Either of two environment variables can specify output of
|
|
dependencies. Their value is either "OUTPUT_FILE" or "OUTPUT_FILE
|
|
DEPS_TARGET", where OUTPUT_FILE is the file to write deps info to
|
|
and DEPS_TARGET is the target to mention in the deps. They also
|
|
result in dependency information being appended to the output file
|
|
rather than overwriting it, and like Sun's compiler
|
|
SUNPRO_DEPENDENCIES suppresses the dependency on the main file. */
|
|
static void
|
|
check_deps_environment_vars (void)
|
|
{
|
|
char *spec;
|
|
|
|
GET_ENVIRONMENT (spec, "DEPENDENCIES_OUTPUT");
|
|
if (spec)
|
|
cpp_opts->deps.style = DEPS_USER;
|
|
else
|
|
{
|
|
GET_ENVIRONMENT (spec, "SUNPRO_DEPENDENCIES");
|
|
if (spec)
|
|
{
|
|
cpp_opts->deps.style = DEPS_SYSTEM;
|
|
cpp_opts->deps.ignore_main_file = true;
|
|
}
|
|
}
|
|
|
|
if (spec)
|
|
{
|
|
/* Find the space before the DEPS_TARGET, if there is one. */
|
|
char *s = strchr (spec, ' ');
|
|
if (s)
|
|
{
|
|
/* Let the caller perform MAKE quoting. */
|
|
defer_opt (OPT_MT, s + 1);
|
|
*s = '\0';
|
|
}
|
|
|
|
/* Command line -MF overrides environment variables and default. */
|
|
if (!deps_file)
|
|
deps_file = spec;
|
|
|
|
deps_append = 1;
|
|
deps_seen = true;
|
|
}
|
|
}
|
|
|
|
/* Handle deferred command line switches. */
|
|
static void
|
|
handle_deferred_opts (void)
|
|
{
|
|
size_t i;
|
|
struct deps *deps;
|
|
|
|
/* Avoid allocating the deps buffer if we don't need it.
|
|
(This flag may be true without there having been -MT or -MQ
|
|
options, but we'll still need the deps buffer.) */
|
|
if (!deps_seen)
|
|
return;
|
|
|
|
deps = cpp_get_deps (parse_in);
|
|
|
|
for (i = 0; i < deferred_count; i++)
|
|
{
|
|
struct deferred_opt *opt = &deferred_opts[i];
|
|
|
|
if (opt->code == OPT_MT || opt->code == OPT_MQ)
|
|
deps_add_target (deps, opt->arg, opt->code == OPT_MQ);
|
|
}
|
|
}
|
|
|
|
/* These settings are appropriate for GCC, but not necessarily so for
|
|
cpplib as a library. */
|
|
static void
|
|
sanitize_cpp_opts (void)
|
|
{
|
|
/* If we don't know what style of dependencies to output, complain
|
|
if any other dependency switches have been given. */
|
|
if (deps_seen && cpp_opts->deps.style == DEPS_NONE)
|
|
error ("to generate dependencies you must specify either -M or -MM");
|
|
|
|
/* -dM and dependencies suppress normal output; do it here so that
|
|
the last -d[MDN] switch overrides earlier ones. */
|
|
if (flag_dump_macros == 'M')
|
|
flag_no_output = 1;
|
|
|
|
/* Disable -dD, -dN and -dI if normal output is suppressed. Allow
|
|
-dM since at least glibc relies on -M -dM to work. */
|
|
/* Also, flag_no_output implies flag_no_line_commands, always. */
|
|
if (flag_no_output)
|
|
{
|
|
if (flag_dump_macros != 'M')
|
|
flag_dump_macros = 0;
|
|
flag_dump_includes = 0;
|
|
flag_no_line_commands = 1;
|
|
}
|
|
|
|
cpp_opts->unsigned_char = !flag_signed_char;
|
|
cpp_opts->stdc_0_in_system_headers = STDC_0_IN_SYSTEM_HEADERS;
|
|
|
|
/* We want -Wno-long-long to override -pedantic -std=non-c99
|
|
and/or -Wtraditional, whatever the ordering. */
|
|
cpp_opts->warn_long_long
|
|
= warn_long_long && ((!flag_isoc99 && pedantic) || warn_traditional);
|
|
|
|
/* Similarly with -Wno-variadic-macros. No check for c99 here, since
|
|
this also turns off warnings about GCCs extension. */
|
|
cpp_opts->warn_variadic_macros
|
|
= warn_variadic_macros && (pedantic || warn_traditional);
|
|
|
|
/* If we're generating preprocessor output, emit current directory
|
|
if explicitly requested or if debugging information is enabled.
|
|
??? Maybe we should only do it for debugging formats that
|
|
actually output the current directory? */
|
|
if (flag_working_directory == -1)
|
|
flag_working_directory = (debug_info_level != DINFO_LEVEL_NONE);
|
|
}
|
|
|
|
/* Add include path with a prefix at the front of its name. */
|
|
static void
|
|
add_prefixed_path (const char *suffix, size_t chain)
|
|
{
|
|
char *path;
|
|
const char *prefix;
|
|
size_t prefix_len, suffix_len;
|
|
|
|
suffix_len = strlen (suffix);
|
|
prefix = iprefix ? iprefix : cpp_GCC_INCLUDE_DIR;
|
|
prefix_len = iprefix ? strlen (iprefix) : cpp_GCC_INCLUDE_DIR_len;
|
|
|
|
path = (char *) xmalloc (prefix_len + suffix_len + 1);
|
|
memcpy (path, prefix, prefix_len);
|
|
memcpy (path + prefix_len, suffix, suffix_len);
|
|
path[prefix_len + suffix_len] = '\0';
|
|
|
|
add_path (path, chain, 0, false);
|
|
}
|
|
|
|
/* Handle -D, -U, -A, -imacros, and the first -include. */
|
|
static void
|
|
finish_options (void)
|
|
{
|
|
if (!cpp_opts->preprocessed)
|
|
{
|
|
size_t i;
|
|
|
|
cb_file_change (parse_in,
|
|
linemap_add (&line_table, LC_RENAME, 0,
|
|
_("<built-in>"), 0));
|
|
|
|
cpp_init_builtins (parse_in, flag_hosted);
|
|
c_cpp_builtins (parse_in);
|
|
|
|
/* We're about to send user input to cpplib, so make it warn for
|
|
things that we previously (when we sent it internal definitions)
|
|
told it to not warn.
|
|
|
|
C99 permits implementation-defined characters in identifiers.
|
|
The documented meaning of -std= is to turn off extensions that
|
|
conflict with the specified standard, and since a strictly
|
|
conforming program cannot contain a '$', we do not condition
|
|
their acceptance on the -std= setting. */
|
|
cpp_opts->warn_dollars = (cpp_opts->pedantic && !cpp_opts->c99);
|
|
|
|
cpp_change_file (parse_in, LC_RENAME, _("<command line>"));
|
|
for (i = 0; i < deferred_count; i++)
|
|
{
|
|
struct deferred_opt *opt = &deferred_opts[i];
|
|
|
|
if (opt->code == OPT_D)
|
|
cpp_define (parse_in, opt->arg);
|
|
else if (opt->code == OPT_U)
|
|
cpp_undef (parse_in, opt->arg);
|
|
else if (opt->code == OPT_A)
|
|
{
|
|
if (opt->arg[0] == '-')
|
|
cpp_unassert (parse_in, opt->arg + 1);
|
|
else
|
|
cpp_assert (parse_in, opt->arg);
|
|
}
|
|
}
|
|
|
|
/* Handle -imacros after -D and -U. */
|
|
for (i = 0; i < deferred_count; i++)
|
|
{
|
|
struct deferred_opt *opt = &deferred_opts[i];
|
|
|
|
if (opt->code == OPT_imacros
|
|
&& cpp_push_include (parse_in, opt->arg))
|
|
{
|
|
/* Disable push_command_line_include callback for now. */
|
|
include_cursor = deferred_count + 1;
|
|
cpp_scan_nooutput (parse_in);
|
|
}
|
|
}
|
|
}
|
|
|
|
include_cursor = 0;
|
|
push_command_line_include ();
|
|
}
|
|
|
|
/* Give CPP the next file given by -include, if any. */
|
|
static void
|
|
push_command_line_include (void)
|
|
{
|
|
while (include_cursor < deferred_count)
|
|
{
|
|
struct deferred_opt *opt = &deferred_opts[include_cursor++];
|
|
|
|
if (!cpp_opts->preprocessed && opt->code == OPT_include
|
|
&& cpp_push_include (parse_in, opt->arg))
|
|
return;
|
|
}
|
|
|
|
if (include_cursor == deferred_count)
|
|
{
|
|
include_cursor++;
|
|
/* -Wunused-macros should only warn about macros defined hereafter. */
|
|
cpp_opts->warn_unused_macros = warn_unused_macros;
|
|
/* Restore the line map from <command line>. */
|
|
if (!cpp_opts->preprocessed)
|
|
cpp_change_file (parse_in, LC_RENAME, this_input_filename);
|
|
|
|
/* Set this here so the client can change the option if it wishes,
|
|
and after stacking the main file so we don't trace the main file. */
|
|
line_table.trace_includes = cpp_opts->print_include_names;
|
|
}
|
|
}
|
|
|
|
/* File change callback. Has to handle -include files. */
|
|
static void
|
|
cb_file_change (cpp_reader * ARG_UNUSED (pfile),
|
|
const struct line_map *new_map)
|
|
{
|
|
if (flag_preprocess_only)
|
|
pp_file_change (new_map);
|
|
else
|
|
fe_file_change (new_map);
|
|
|
|
if (new_map == 0 || (new_map->reason == LC_LEAVE && MAIN_FILE_P (new_map)))
|
|
push_command_line_include ();
|
|
}
|
|
|
|
void
|
|
cb_dir_change (cpp_reader * ARG_UNUSED (pfile), const char *dir)
|
|
{
|
|
if (!set_src_pwd (dir))
|
|
warning (0, "too late for # directive to set debug directory");
|
|
}
|
|
|
|
/* Set the C 89 standard (with 1994 amendments if C94, without GNU
|
|
extensions if ISO). There is no concept of gnu94. */
|
|
static void
|
|
set_std_c89 (int c94, int iso)
|
|
{
|
|
cpp_set_lang (parse_in, c94 ? CLK_STDC94: iso ? CLK_STDC89: CLK_GNUC89);
|
|
flag_iso = iso;
|
|
flag_no_asm = iso;
|
|
flag_no_gnu_keywords = iso;
|
|
flag_no_nonansi_builtin = iso;
|
|
flag_isoc94 = c94;
|
|
flag_isoc99 = 0;
|
|
}
|
|
|
|
/* Set the C 99 standard (without GNU extensions if ISO). */
|
|
static void
|
|
set_std_c99 (int iso)
|
|
{
|
|
cpp_set_lang (parse_in, iso ? CLK_STDC99: CLK_GNUC99);
|
|
flag_no_asm = iso;
|
|
flag_no_nonansi_builtin = iso;
|
|
flag_iso = iso;
|
|
flag_isoc99 = 1;
|
|
flag_isoc94 = 1;
|
|
}
|
|
|
|
/* Set the C++ 98 standard (without GNU extensions if ISO). */
|
|
static void
|
|
set_std_cxx98 (int iso)
|
|
{
|
|
cpp_set_lang (parse_in, iso ? CLK_CXX98: CLK_GNUCXX);
|
|
flag_no_gnu_keywords = iso;
|
|
flag_no_nonansi_builtin = iso;
|
|
flag_iso = iso;
|
|
}
|
|
|
|
/* Handle setting implicit to ON. */
|
|
static void
|
|
set_Wimplicit (int on)
|
|
{
|
|
warn_implicit = on;
|
|
warn_implicit_int = on;
|
|
if (on)
|
|
{
|
|
if (mesg_implicit_function_declaration != 2)
|
|
mesg_implicit_function_declaration = 1;
|
|
}
|
|
else
|
|
mesg_implicit_function_declaration = 0;
|
|
}
|
|
|
|
/* Args to -d specify what to dump. Silently ignore
|
|
unrecognized options; they may be aimed at toplev.c. */
|
|
static void
|
|
handle_OPT_d (const char *arg)
|
|
{
|
|
char c;
|
|
|
|
while ((c = *arg++) != '\0')
|
|
switch (c)
|
|
{
|
|
case 'M': /* Dump macros only. */
|
|
case 'N': /* Dump names. */
|
|
case 'D': /* Dump definitions. */
|
|
flag_dump_macros = c;
|
|
break;
|
|
|
|
case 'I':
|
|
flag_dump_includes = 1;
|
|
break;
|
|
}
|
|
}
|