import of gcc-4.2.1, the last gcc release under GPLv2

1 files changed, 206 insertions, 0 deletions

diff --git a/gnu/gcc/libcpp/makedepend.c b/gnu/gcc/libcpp/makedepend.c
new file mode 100644
index 00000000000..c67f64e236e
--- /dev/null
+++ b/gnu/gcc/libcpp/makedepend.c
@@ -0,0 +1,206 @@
+/* Dependency generator utility.
+   Copyright (C) 2004 Free Software Foundation, Inc.
+   Contributed by Zack Weinberg, May 2004
+
+This program 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.
+
+This program 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 this program; if not, write to the Free Software
+Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+
+ In other words, you are welcome to use, share and improve this program.
+ You are forbidden to forbid anyone else to use, share and improve
+ what you give them.   Help stamp out software-hoarding!  */
+
+#include "config.h"
+#include "system.h"
+#include "line-map.h"
+#include "cpplib.h"
+#include "getopt.h"
+#include "mkdeps.h"
+
+const char *progname;
+const char *vpath;
+
+static const char *output_file;
+static bool had_errors;
+
+/* Option lists, to give to cpplib before each input file.  */
+struct cmd_line_macro
+{
+  struct cmd_line_macro *next;
+  bool is_undef;
+  const char *macro;
+};
+
+static struct cmd_line_macro *cmd_line_macros;
+static cpp_dir *cmd_line_searchpath;
+
+static void
+add_clm (const char *macro, bool is_undef)
+{
+  struct cmd_line_macro *clm = XNEW (struct cmd_line_macro);
+  clm->next = cmd_line_macros;
+  clm->is_undef = is_undef;
+  clm->macro = macro;
+  cmd_line_macros = clm;
+}
+
+static void
+add_dir (char *name, bool sysp)
+{
+  cpp_dir *dir = XNEW (cpp_dir);
+  dir->next = cmd_line_searchpath;
+  dir->name = name;
+  dir->sysp = sysp;
+  dir->construct = 0;
+  dir->user_supplied_p = 1;
+  cmd_line_searchpath = dir;
+}
+
+/* Command line processing.  */
+
+static void ATTRIBUTE_NORETURN
+usage (int errcode)
+{
+  fprintf (stderr,
+"usage: %s [-vh] [-V vpath] [-Dname[=def]...] [-Uname] [-Idir...] [-o file] sources...\n",
+	   progname);
+  exit (errcode);
+}
+
+static int
+parse_options (int argc, char **argv)
+{
+  static const struct option longopts[] = {
+    { "--help", no_argument, 0, 'h' },
+    { 0, 0, 0, 0 }
+  };
+
+  for (;;)
+    switch (getopt_long (argc, argv, "hD:U:I:J:o:V:", longopts, 0))
+      {
+      case 'h': usage (0);
+      case 'D': add_clm (optarg, false); break;
+      case 'U': add_clm (optarg, true);  break;
+      case 'I': add_dir (optarg, false); break;
+      case 'J': add_dir (optarg, true);  break;
+      case 'o':
+	if (output_file)
+	  {
+	    fprintf (stderr, "%s: too many output files\n", progname);
+	    usage (2);
+	  }
+	output_file = optarg;
+	break;
+      case 'V':
+	if (vpath)
+	  {
+	    fprintf (stderr, "%s: too many vpaths\n", progname);
+	    usage (2);
+	  }
+	vpath = optarg;
+	break;
+      case '?':
+	usage (2);  /* getopt has issued the error message.  */
+
+      case -1: /* end of options */
+	if (optind == argc)
+	  {
+	    fprintf (stderr, "%s: no input files\n", progname);
+	    usage (2);
+	  }
+	return optind;
+
+      default:
+	abort ();
+      }
+}
+
+/* Set up cpplib from command line options.  */
+static cpp_reader *
+reader_init (struct line_maps *line_table)
+{
+  cpp_reader *reader;
+  cpp_options *options;
+
+  linemap_init (line_table);
+  reader = cpp_create_reader (CLK_GNUC89, 0, line_table);
+
+  /* Ignore warnings and errors (we don't have access to system
+     headers).  Request dependency output.  */
+  options = cpp_get_options (reader);
+  options->inhibit_warnings = 1;
+  options->inhibit_errors = 1;
+  options->deps.style = DEPS_USER;
+
+  /* Further initialization.  */
+  cpp_post_options (reader);
+  cpp_init_iconv (reader);
+  cpp_set_include_chains (reader, cmd_line_searchpath, cmd_line_searchpath,
+			  false);
+  if (vpath)
+    {
+      struct deps *deps = cpp_get_deps (reader);
+      deps_add_vpath (deps, vpath);
+    }
+
+  return reader;
+}
+
+/* Process one input source file.  */
+static void
+process_file (const char *file)
+{
+  struct line_maps line_table;
+  cpp_reader *reader = reader_init (&line_table);
+
+  if (!cpp_read_main_file (reader, file))
+    had_errors = true;
+  else
+    {
+      struct cmd_line_macro *clm;
+
+      cpp_init_builtins (reader, true);
+      for (clm = cmd_line_macros; clm; clm = clm->next)
+	(clm->is_undef ? cpp_undef : cpp_define) (reader, clm->macro);
+
+      cpp_scan_nooutput (reader);
+      if (cpp_finish (reader, stdout))
+	had_errors = true;
+    }
+  cpp_destroy (reader);
+  linemap_free (&line_table);
+}
+
+/* Master control.  */
+
+int
+main(int argc, char **argv)
+{
+  int first_input, i;
+
+  progname = argv[0];
+  xmalloc_set_program_name (progname);
+
+  first_input = parse_options (argc, argv);
+  if (output_file)
+    if (!freopen (output_file, "w", stdout))
+      {
+	perror (output_file);
+	return 1;
+      }
+
+  for (i = first_input; i < argc; i++)
+    process_file (argv[i]);
+
+  return had_errors;
+}