sdcc-3.9.0 fork implementing GNU assembler syntax

This fork aims to provide better support for stm8-binutils

1 files changed, 936 insertions, 0 deletions

diff --git a/support/cpp/sdcpp-opts.c b/support/cpp/sdcpp-opts.c
new file mode 100644
index 0000000..9df64f2
--- /dev/null
+++ b/support/cpp/sdcpp-opts.c
@@ -0,0 +1,936 @@
+/* C/ObjC/C++ command line option handling.
+   Copyright (C) 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
+   Contributed by Neil Booth.
+
+This file is part of GCC.
+
+GCC 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.
+
+GCC 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 GCC; see the file COPYING.  If not, write to the Free
+Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301, USA.  */
+
+#include "config.h"
+#include "system.h"
+#include "intl.h"
+#include "cppdefault.h"
+#include "c-incpath.h"
+#include "opts.h"
+#include "options.h"
+#include "mkdeps.h"
+
+#ifndef DOLLARS_IN_IDENTIFIERS
+# define DOLLARS_IN_IDENTIFIERS true
+#endif
+
+#ifndef TARGET_SYSTEM_ROOT
+# define TARGET_SYSTEM_ROOT NULL
+#endif
+
+/* CPP's options.  */
+static cpp_options *cpp_opts;
+
+/* Input filename.  */
+static const char *this_input_filename;
+
+/* Filename and stream for preprocessed output.  */
+static const char *out_fname;
+static FILE *out_stream;
+
+/* Append dependencies to deps_file.  */
+static bool deps_append;
+
+/* If dependency switches (-MF etc.) have been given.  */
+static bool deps_seen;
+
+/* If -v seen.  */
+static bool verbose;
+
+/* Dependency output file.  */
+static const char *deps_file;
+
+/* The prefix given by -iprefix, if any.  */
+static const char *iprefix;
+
+/* The multilib directory given by -imultilib, if any.  */
+static const char *imultilib;
+
+/* The system root, if any.  Overridden by -isysroot.  */
+static const char *sysroot = TARGET_SYSTEM_ROOT;
+
+/* Zero disables all standard directories for headers.  */
+static bool std_inc = true;
+
+/* If the quote chain has been split by -I-.  */
+static bool quote_chain_split;
+
+/* If -Wunused-macros.  */
+static bool warn_unused_macros;
+
+/* If -Wvariadic-macros.  */
+static bool warn_variadic_macros = true;
+
+/* Number of deferred options.  */
+static size_t deferred_count;
+
+/* Number of deferred options scanned for -include.  */
+static size_t include_cursor;
+
+static void handle_OPT_d (const char *);
+static void set_std_c89 (int, int);
+static void set_std_c99 (int);
+static void set_std_c11 (void);
+static void check_deps_environment_vars (void);
+static void handle_deferred_opts (void);
+static void sanitize_cpp_opts (void);
+static void add_prefixed_path (const char *, size_t);
+static void push_command_line_include (void);
+static void cb_file_change (cpp_reader *, const struct line_map *);
+static void cb_dir_change (cpp_reader *, const char *);
+static void finish_options (void);
+
+#ifndef STDC_0_IN_SYSTEM_HEADERS
+#define STDC_0_IN_SYSTEM_HEADERS 0
+#endif
+
+/* Holds switches parsed by sdcpp_common_handle_option (), but whose
+   handling is deferred to sdcpp_common_post_options ().  */
+static void defer_opt (enum opt_code, const char *);
+static struct deferred_opt
+{
+  enum opt_code code;
+  const char *arg;
+} *deferred_opts;
+
+/* Complain that switch CODE expects an argument but none was
+   provided.  OPT was the command-line option.  Return FALSE to get
+   the default message in opts.c, TRUE if we provide a specialized
+   one.  */
+bool
+sdcpp_common_missing_argument (const char *opt, size_t code)
+{
+  switch (code)
+    {
+    default:
+      /* Pick up the default message.  */
+      return false;
+
+    case OPT_A:
+      error ("assertion missing after \"%s\"", opt);
+      break;
+
+    case OPT_D:
+    case OPT_U:
+      error ("macro name missing after \"%s\"", opt);
+      break;
+
+    case OPT_I:
+    case OPT_idirafter:
+    case OPT_isysroot:
+    case OPT_isystem:
+    case OPT_iquote:
+      error ("missing path after \"%s\"", opt);
+      break;
+
+    case OPT_MF:
+    case OPT_MD:
+    case OPT_MMD:
+    case OPT_include:
+    case OPT_imacros:
+    case OPT_o:
+      error ("missing filename after \"%s\"", opt);
+      break;
+
+    case OPT_MQ:
+    case OPT_MT:
+      error ("missing makefile target after \"%s\"", opt);
+      break;
+    }
+
+  return true;
+}
+
+/* Defer option CODE with argument ARG.  */
+static void
+defer_opt (enum opt_code code, const char *arg)
+{
+  deferred_opts[deferred_count].code = code;
+  deferred_opts[deferred_count].arg = arg;
+  deferred_count++;
+}
+
+/* Common initialization before parsing options.  */
+unsigned int
+sdcpp_common_init_options (unsigned int argc, const char **argv ATTRIBUTE_UNUSED)
+{
+  struct cpp_callbacks *cb;
+
+  parse_in = cpp_create_reader (CLK_GNUC89, NULL, line_table);
+  cb = cpp_get_callbacks (parse_in);
+  cb->error = c_cpp_error;
+
+  cpp_opts = cpp_get_options (parse_in);
+  cpp_opts->dollars_in_ident = DOLLARS_IN_IDENTIFIERS;
+  cpp_opts->objc = 0;
+
+  /* Reset to avoid warnings on internal definitions.  We set it just
+     before passing on command-line options to cpplib.  */
+  cpp_opts->warn_dollars = 0;
+
+  deferred_opts = XNEWVEC (struct deferred_opt, argc);
+
+  return CL_SDCPP;
+}
+
+/* Handle switch SCODE with argument ARG.  VALUE is true, unless no-
+   form of an -f or -W option was given.  Returns 0 if the switch was
+   invalid, a negative number to prevent language-independent
+   processing in toplev.c (a hack necessary for the short-term).  */
+int
+sdcpp_common_handle_option (size_t scode, const char *arg, int value)
+{
+  enum opt_code code = (enum opt_code) scode;
+  int result = 1;
+
+  switch (code)
+    {
+    default:
+      result = 0;
+      break;
+
+#if 0 /* pch not supported by sdcpp */
+    case OPT__output_pch_:
+      pch_file = arg;
+      break;
+#endif
+
+    case OPT_A:
+      defer_opt (code, arg);
+      break;
+
+    case OPT_C:
+      cpp_opts->discard_comments = 0;
+      break;
+
+    case OPT_CC:
+      cpp_opts->discard_comments = 0;
+      cpp_opts->discard_comments_in_macro_exp = 0;
+      break;
+
+    case OPT_D:
+      defer_opt (code, arg);
+      break;
+
+    case OPT_H:
+      cpp_opts->print_include_names = 1;
+      break;
+
+    case OPT_I:
+      if (strcmp (arg, "-"))
+        add_path (xstrdup (arg), BRACKET, 0, true);
+      else
+        {
+          if (quote_chain_split)
+            error ("-I- specified twice");
+          quote_chain_split = true;
+          split_quote_chain ();
+          inform ("obsolete option -I- used, please use -iquote instead");
+        }
+      break;
+
+    case OPT_M:
+    case OPT_MM:
+      /* When doing dependencies with -M or -MM, suppress normal
+         preprocessed output, but still do -dM etc. as software
+         depends on this.  Preprocessed output does occur if -MD, -MMD
+         or environment var dependency generation is used.  */
+      cpp_opts->deps.style = (code == OPT_M ? DEPS_SYSTEM: DEPS_USER);
+      flag_no_output = 1;
+      inhibit_warnings = 1;
+      break;
+
+    case OPT_MD:
+    case OPT_MMD:
+      cpp_opts->deps.style = (code == OPT_MD ? DEPS_SYSTEM: DEPS_USER);
+      cpp_opts->deps.need_preprocessor_output = true;
+      deps_file = arg;
+      break;
+
+    case OPT_MF:
+      deps_seen = true;
+      deps_file = arg;
+      break;
+
+    case OPT_MG:
+      deps_seen = true;
+      cpp_opts->deps.missing_files = true;
+      break;
+
+    case OPT_MP:
+      deps_seen = true;
+      cpp_opts->deps.phony_targets = true;
+      break;
+
+    case OPT_MQ:
+    case OPT_MT:
+      deps_seen = true;
+      defer_opt (code, arg);
+      break;
+
+    case OPT_P:
+      flag_no_line_commands = 1;
+      break;
+
+    case OPT_fworking_directory:
+      flag_working_directory = value;
+      break;
+
+    case OPT_U:
+      defer_opt (code, arg);
+      break;
+
+    case OPT_Wall:
+      cpp_opts->warn_trigraphs = value;
+      cpp_opts->warn_comments = value;
+      cpp_opts->warn_num_sign_change = value;
+      cpp_opts->warn_multichar = value; /* Was C++ only.  */
+      break;
+
+    case OPT_Wcomment:
+    case OPT_Wcomments:
+      cpp_opts->warn_comments = value;
+      break;
+
+    case OPT_Wdeprecated:
+      cpp_opts->cpp_warn_deprecated = value;
+      break;
+
+    case OPT_Wendif_labels:
+      cpp_opts->warn_endif_labels = value;
+      break;
+
+    case OPT_Wimport:
+      /* Silently ignore for now.  */
+      break;
+
+#if 0 // pch not supported by sdcpp
+    case OPT_Winvalid_pch:
+      cpp_opts->warn_invalid_pch = value;
+      break;
+#endif
+
+    case OPT_Wtraditional:
+      cpp_opts->cpp_warn_traditional = value;
+      break;
+
+    case OPT_Wtrigraphs:
+      cpp_opts->warn_trigraphs = value;
+      break;
+
+    case OPT_Wundef:
+      cpp_opts->warn_undef = value;
+      break;
+
+    case OPT_Wunused_macros:
+      warn_unused_macros = value;
+      break;
+
+    case OPT_Wvariadic_macros:
+      warn_variadic_macros = value;
+      break;
+
+    case OPT_ansi:
+      set_std_c89 (false, true);
+      break;
+
+    case OPT_d:
+      handle_OPT_d (arg);
+      break;
+
+    case OPT_fdollars_in_identifiers:
+      cpp_opts->dollars_in_ident = value;
+      break;
+
+    case OPT_fsigned_char:
+      flag_signed_char = value;
+      break;
+
+    case OPT_funsigned_char:
+      flag_signed_char = !value;
+      break;
+
+#if 0 // pch not supported by sdcpp
+    case OPT_fpch_deps:
+      cpp_opts->restore_pch_deps = value;
+      break;
+
+    case OPT_fpch_preprocess:
+      flag_pch_preprocess = value;
+      break;
+#endif
+
+    case OPT_fpreprocessed:
+      cpp_opts->preprocessed = 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_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_imultilib:
+      imultilib = 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_objc:
+      cpp_opts->objc = 1;
+      break;
+
+    case OPT_nostdinc:
+      std_inc = false;
+      break;
+
+    case OPT_o:
+      if (!out_fname)
+        out_fname = arg;
+      else
+        error ("output filename specified several times");
+      break;
+
+      /* SDCPP specfic */
+    case OPT_obj_ext_:
+      cpp_opts->obj_ext = arg;
+      break;
+
+      /* We need to handle the -pedantic switches here, rather than in
+         sdcpp_common_post_options, so that a subsequent -Wno-endif-labels
+         is not overridden.  */
+    case OPT_pedantic_errors:
+    case OPT_pedantic:
+      cpp_opts->cpp_pedantic = 1;
+      cpp_opts->warn_endif_labels = 1;
+      break;
+
+      /* SDCPP specfic */
+    case OPT_pedantic_parse_number:
+      cpp_opts->pedantic_parse_number = 1;
+      break;
+
+#if 0 // pch not supported by sdcpp
+    case OPT_print_pch_checksum:
+      c_common_print_pch_checksum (stdout);
+      exit_after_options = true;
+      break;
+#endif
+
+    case OPT_remap:
+      cpp_opts->remap = 1;
+      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_c99:
+    case OPT_std_iso9899_1999:
+      set_std_c99 (true /* ISO */);
+      break;
+
+    case OPT_std_c11:
+      set_std_c11 ();
+      break;
+
+    case OPT_no_trigraphs:
+      /* trigraphs enabled by default on sdcpp, -no-trgraphs disables them */
+      cpp_opts->trigraphs = 0;
+      break;
+
+    case OPT_traditional_cpp:
+      cpp_opts->traditional = 1;
+      break;
+
+    case OPT_v:
+      verbose = true;
+      break;
+    }
+
+  return result;
+}
+
+/* Post-switch processing.  */
+bool
+sdcpp_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 (num_in_fnames > 1)
+    {
+      if (!out_fname)
+        out_fname = in_fnames[1];
+      else
+        error ("output filename specified several times");
+    }
+
+  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, imultilib,
+                           std_inc, 0, verbose);
+
+  /* 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: %s", out_fname, strerror(errno));
+      return false;
+    }
+
+  if (num_in_fnames > 2)
+    error ("too many filenames given.  Type %s --help for usage",
+           progname);
+
+  init_pp_output (out_stream);
+
+  cb = cpp_get_callbacks (parse_in);
+  cb->file_change = cb_file_change;
+  cb->dir_change = cb_dir_change;
+  cpp_post_options (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_no_line_commands)
+    pp_dir_change (parse_in, get_src_pwd ());
+
+  return 1;
+}
+
+/* Front end initialization. */
+bool
+sdcpp_common_init (void)
+{
+  /* Default CPP arithmetic to something sensible for the host for the
+     benefit of dumb users like fix-header.  */
+  cpp_opts->precision = CHAR_BIT * sizeof (long);
+  cpp_opts->char_precision = CHAR_BIT;
+  cpp_opts->int_precision = CHAR_BIT * sizeof (int);
+  cpp_opts->wchar_precision = CHAR_BIT * sizeof (int);
+  cpp_opts->unsigned_wchar = 1;
+  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 0
+  if (version_flag)
+    c_common_print_pch_checksum (stderr);
+#endif
+
+  finish_options ();
+  preprocess_file (parse_in);
+  return true;
+}
+
+/* Common finish hook for the C, ObjC and C++ front ends.  */
+void
+sdcpp_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: %s", deps_file, strerror(errno));
+        }
+    }
+
+  /* For performance, avoid tearing down cpplib's internal structures
+     with cpp_destroy ().  */
+  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: %s", deps_file, strerror(errno));
+
+  if (out_stream && (ferror (out_stream) || fclose (out_stream)))
+    fatal_error ("when writing output to %s: %s", out_fname, strerror(errno));
+}
+
+/* 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;
+
+  /* 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  */
+  if (flag_working_directory == -1)
+    flag_working_directory = 0;
+}
+
+/* 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, 0 /*flag_hosted*/);
+
+      /* 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->cpp_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)
+{
+  pp_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);
+}
+
+/* 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);
+}
+
+/* Set the C 11 standard (without GNU extensions).  */
+static void
+set_std_c11 (void)
+{
+  cpp_set_lang (parse_in, CLK_STDC1X);
+}
+
+/* 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;
+      }
+}