示例#1
0
bool
gfc_post_options (const char **pfilename)
{
  const char *filename = *pfilename, *canon_source_file = NULL;
  char *source_path;
  int i;

  /* Excess precision other than "fast" requires front-end
     support.  */
  if (flag_excess_precision_cmdline == EXCESS_PRECISION_STANDARD
      && TARGET_FLT_EVAL_METHOD_NON_DEFAULT)
    sorry ("-fexcess-precision=standard for Fortran");
  flag_excess_precision_cmdline = EXCESS_PRECISION_FAST;

  /* Whole program needs whole file mode.  */
  if (flag_whole_program)
    gfc_option.flag_whole_file = 1;

  /* Enable whole-file mode if LTO is in effect.  */
  if (flag_lto)
    gfc_option.flag_whole_file = 1;

  /* Fortran allows associative math - but we cannot reassociate if
     we want traps or signed zeros. Cf. also flag_protect_parens.  */
  if (flag_associative_math == -1)
    flag_associative_math = (!flag_trapping_math && !flag_signed_zeros);

  /* By default, disable (re)allocation during assignment for -std=f95,
     and enable it for F2003/F2008/GNU/Legacy. */
  if (gfc_option.flag_realloc_lhs == -1)
    {
      if (gfc_option.allow_std & GFC_STD_F2003)
	gfc_option.flag_realloc_lhs = 1;
      else
	gfc_option.flag_realloc_lhs = 0;
    }

  /* -fbounds-check is equivalent to -fcheck=bounds */
  if (flag_bounds_check)
    gfc_option.rtcheck |= GFC_RTCHECK_BOUNDS;

  if (flag_compare_debug)
    gfc_option.dump_fortran_original = 0;

  /* Make -fmax-errors visible to gfortran's diagnostic machinery.  */
  if (global_options_set.x_flag_max_errors)
    gfc_option.max_errors = flag_max_errors;

  /* Verify the input file name.  */
  if (!filename || strcmp (filename, "-") == 0)
    {
      filename = "";
    }

  if (gfc_option.flag_preprocessed)
    {
      /* For preprocessed files, if the first tokens are of the form # NUM.
	 handle the directives so we know the original file name.  */
      gfc_source_file = gfc_read_orig_filename (filename, &canon_source_file);
      if (gfc_source_file == NULL)
	gfc_source_file = filename;
      else
	*pfilename = gfc_source_file;
    }
  else
    gfc_source_file = filename;

  if (canon_source_file == NULL)
    canon_source_file = gfc_source_file;

  /* Adds the path where the source file is to the list of include files.  */

  i = strlen (canon_source_file);
  while (i > 0 && !IS_DIR_SEPARATOR (canon_source_file[i]))
    i--;

  if (i != 0)
    {
      source_path = (char *) alloca (i + 1);
      memcpy (source_path, canon_source_file, i);
      source_path[i] = 0;
      gfc_add_include_path (source_path, true, true);
    }
  else
    gfc_add_include_path (".", true, true);

  if (canon_source_file != gfc_source_file)
    gfc_free (CONST_CAST (char *, canon_source_file));

  /* Decide which form the file will be read in as.  */

  if (gfc_option.source_form != FORM_UNKNOWN)
    gfc_current_form = gfc_option.source_form;
  else
    {
      gfc_current_form = form_from_filename (filename);

      if (gfc_current_form == FORM_UNKNOWN)
	{
	  gfc_current_form = FORM_FREE;
	  gfc_warning_now ("Reading file '%s' as free form", 
			   (filename[0] == '\0') ? "<stdin>" : filename);
	}
    }

  /* If the user specified -fd-lines-as-{code|comments} verify that we're
     in fixed form.  */
  if (gfc_current_form == FORM_FREE)
    {
      if (gfc_option.flag_d_lines == 0)
	gfc_warning_now ("'-fd-lines-as-comments' has no effect "
			 "in free form");
      else if (gfc_option.flag_d_lines == 1)
	gfc_warning_now ("'-fd-lines-as-code' has no effect in free form");
    }

  /* If -pedantic, warn about the use of GNU extensions.  */
  if (pedantic && (gfc_option.allow_std & GFC_STD_GNU) != 0)
    gfc_option.warn_std |= GFC_STD_GNU;
  /* -std=legacy -pedantic is effectively -std=gnu.  */
  if (pedantic && (gfc_option.allow_std & GFC_STD_LEGACY) != 0)
    gfc_option.warn_std |= GFC_STD_F95_OBS | GFC_STD_F95_DEL | GFC_STD_LEGACY;

  /* If the user didn't explicitly specify -f(no)-second-underscore we
     use it if we're trying to be compatible with f2c, and not
     otherwise.  */
  if (gfc_option.flag_second_underscore == -1)
    gfc_option.flag_second_underscore = gfc_option.flag_f2c;

  if (!gfc_option.flag_automatic && gfc_option.flag_max_stack_var_size != -2
      && gfc_option.flag_max_stack_var_size != 0)
    gfc_warning_now ("Flag -fno-automatic overwrites -fmax-stack-var-size=%d",
		     gfc_option.flag_max_stack_var_size);
  else if (!gfc_option.flag_automatic && gfc_option.flag_recursive)
    gfc_warning_now ("Flag -fno-automatic overwrites -frecursive");
  else if (!gfc_option.flag_automatic && gfc_option.gfc_flag_openmp)
    gfc_warning_now ("Flag -fno-automatic overwrites -frecursive implied by "
		     "-fopenmp");
  else if (gfc_option.flag_max_stack_var_size != -2
	   && gfc_option.flag_recursive)
    gfc_warning_now ("Flag -frecursive overwrites -fmax-stack-var-size=%d",
		     gfc_option.flag_max_stack_var_size);
  else if (gfc_option.flag_max_stack_var_size != -2
	   && gfc_option.gfc_flag_openmp)
    gfc_warning_now ("Flag -fmax-stack-var-size=%d overwrites -frecursive "
		     "implied by -fopenmp", 
		     gfc_option.flag_max_stack_var_size);

  /* Implement -frecursive as -fmax-stack-var-size=-1.  */
  if (gfc_option.flag_recursive)
    gfc_option.flag_max_stack_var_size = -1;

  /* Implied -frecursive; implemented as -fmax-stack-var-size=-1.  */
  if (gfc_option.flag_max_stack_var_size == -2 && gfc_option.gfc_flag_openmp
      && gfc_option.flag_automatic)
    {
      gfc_option.flag_recursive = 1;
      gfc_option.flag_max_stack_var_size = -1;
    }

  /* Set default.  */
  if (gfc_option.flag_max_stack_var_size == -2)
    gfc_option.flag_max_stack_var_size = 32768;

  /* Implement -fno-automatic as -fmax-stack-var-size=0.  */
  if (!gfc_option.flag_automatic)
    gfc_option.flag_max_stack_var_size = 0;
  
  if (pedantic)
    { 
      gfc_option.warn_ampersand = 1;
      gfc_option.warn_tabs = 0;
    }

  if (pedantic && gfc_option.flag_whole_file)
    gfc_option.flag_whole_file = 2;

  gfc_cpp_post_options ();

/* FIXME: return gfc_cpp_preprocess_only ();

   The return value of this function indicates whether the
   backend needs to be initialized. On -E, we don't need
   the backend. However, if we return 'true' here, an
   ICE occurs. Initializing the backend doesn't hurt much,
   hence, for now we can live with it as is.  */
  return false;
}
bool
gfc_post_options (const char **pfilename)
{
  const char *filename = *pfilename, *canon_source_file = NULL;
  char *source_path;
  int i;

  /* Issue an error if -fwhole-program was used.  */
  if (flag_whole_program)
    gfc_fatal_error ("Option -fwhole-program is not supported for Fortran");

  /* Verify the input file name.  */
  if (!filename || strcmp (filename, "-") == 0)
    {
      filename = "";
    }

  if (gfc_option.flag_preprocessed)
    {
      /* For preprocessed files, if the first tokens are of the form # NUM.
	 handle the directives so we know the original file name.  */
      gfc_source_file = gfc_read_orig_filename (filename, &canon_source_file);
      if (gfc_source_file == NULL)
	gfc_source_file = filename;
      else
	*pfilename = gfc_source_file;
    }
  else
    gfc_source_file = filename;

  if (canon_source_file == NULL)
    canon_source_file = gfc_source_file;

  /* Adds the path where the source file is to the list of include files.  */

  i = strlen (canon_source_file);
  while (i > 0 && !IS_DIR_SEPARATOR (canon_source_file[i]))
    i--;

  if (i != 0)
    {
      source_path = (char *) alloca (i + 1);
      memcpy (source_path, canon_source_file, i);
      source_path[i] = 0;
      gfc_add_include_path (source_path, true, true);
    }
  else
    gfc_add_include_path (".", true, true);

  if (canon_source_file != gfc_source_file)
    gfc_free (CONST_CAST (char *, canon_source_file));

  /* Decide which form the file will be read in as.  */

  if (gfc_option.source_form != FORM_UNKNOWN)
    gfc_current_form = gfc_option.source_form;
  else
    {
      gfc_current_form = form_from_filename (filename);

      if (gfc_current_form == FORM_UNKNOWN)
	{
	  gfc_current_form = FORM_FREE;
	  gfc_warning_now ("Reading file '%s' as free form", 
			   (filename[0] == '\0') ? "<stdin>" : filename);
	}
    }

  /* If the user specified -fd-lines-as-{code|comments} verify that we're
     in fixed form.  */
  if (gfc_current_form == FORM_FREE)
    {
      if (gfc_option.flag_d_lines == 0)
	gfc_warning_now ("'-fd-lines-as-comments' has no effect "
			 "in free form");
      else if (gfc_option.flag_d_lines == 1)
	gfc_warning_now ("'-fd-lines-as-code' has no effect in free form");
    }

  /* If -pedantic, warn about the use of GNU extensions.  */
  if (pedantic && (gfc_option.allow_std & GFC_STD_GNU) != 0)
    gfc_option.warn_std |= GFC_STD_GNU;
  /* -std=legacy -pedantic is effectively -std=gnu.  */
  if (pedantic && (gfc_option.allow_std & GFC_STD_LEGACY) != 0)
    gfc_option.warn_std |= GFC_STD_F95_OBS | GFC_STD_F95_DEL | GFC_STD_LEGACY;

  /* If the user didn't explicitly specify -f(no)-second-underscore we
     use it if we're trying to be compatible with f2c, and not
     otherwise.  */
  if (gfc_option.flag_second_underscore == -1)
    gfc_option.flag_second_underscore = gfc_option.flag_f2c;

  if (!gfc_option.flag_automatic && gfc_option.flag_max_stack_var_size != -2
      && gfc_option.flag_max_stack_var_size != 0)
    gfc_warning_now ("Flag -fno-automatic overwrites -fmax-stack-var-size=%d",
		     gfc_option.flag_max_stack_var_size);
  else if (!gfc_option.flag_automatic && gfc_option.flag_recursive)
    gfc_warning_now ("Flag -fno-automatic overwrites -frecursive");
  else if (!gfc_option.flag_automatic && gfc_option.flag_openmp)
    gfc_warning_now ("Flag -fno-automatic overwrites -frecursive implied by "
		     "-fopenmp");
  else if (gfc_option.flag_max_stack_var_size != -2
	   && gfc_option.flag_recursive)
    gfc_warning_now ("Flag -frecursive overwrites -fmax-stack-var-size=%d",
		     gfc_option.flag_max_stack_var_size);
  else if (gfc_option.flag_max_stack_var_size != -2
	   && gfc_option.flag_openmp)
    gfc_warning_now ("Flag -fmax-stack-var-size=%d overwrites -frecursive "
		     "implied by -fopenmp", 
		     gfc_option.flag_max_stack_var_size);

  /* Implied -frecursive; implemented as -fmax-stack-var-size=-1.  */
  if (gfc_option.flag_max_stack_var_size == -2 && gfc_option.flag_openmp)
    gfc_option.flag_max_stack_var_size = -1;

  /* Set default.  */
  if (gfc_option.flag_max_stack_var_size == -2)
    gfc_option.flag_max_stack_var_size = 32768;

  /* Implement -frecursive as -fmax-stack-var-size=-1.  */
  if (gfc_option.flag_recursive)
    gfc_option.flag_max_stack_var_size = -1;

  /* Implement -fno-automatic as -fmax-stack-var-size=0.  */
  if (!gfc_option.flag_automatic)
    gfc_option.flag_max_stack_var_size = 0;
  
  if (pedantic)
    { 
      gfc_option.warn_ampersand = 1;
      gfc_option.warn_tabs = 0;
    }

  gfc_cpp_post_options ();

/* FIXME: return gfc_cpp_preprocess_only ();

   The return value of this function indicates whether the
   backend needs to be initialized. On -E, we don't need
   the backend. However, if we return 'true' here, an
   ICE occurs. Initializing the backend doesn't hurt much,
   hence, for now we can live with it as is.  */
  return false;
}