Removal of separate preprocessor cpp0.

	* Makefile.in (GCC_PASSES, STAGESTUFF, LIBCPP_OBJS,
	cpp0, install-common): Update.
	* c-common.c (flag_preprocess_only): New.
	(c_common_init): Preprocess for -E.
	* c-common.h (flag_preprocess_only): New.
	* c-decl.c (c_decode_option): Handle -E, and -std=c++98.
	* c-objc-common.c (c_init_decl_processing): Exit quickly
	for NULL return from c_common_init.
	* cpplib.h (cpp_preprocess_file): New.
	* cppmain.c (main, general_init, pfile, progname): Remove.
	(do_preprocessing): Rename cpp_preprocess_file, don't call
	cpp_finish.  Don't close stdout here.
	(setup_callbacks): Update prototype.
	* gcc.c (trad_capable_cpp, cpp_unique_options, default_compilers):
	Update.
	* tradcpp.c (main): Ignore -quiet.
cp:
	* decl2.c (cxx_decode_option): Handle -E.
	* lang-specs.h (default_compilers): Preprocess with cc1plus.
	* lex.c (cxx_init): Exit quickly if c_common_init returns NULL.
objc:
	* lang-specs.h (default_compilers): Preprocess with cc1obj.

Co-Authored-By: Aldy Hernandez <aldyh@redhat.com>

From-SVN: r51256

1 files changed, 15 insertions, 74 deletions

diff --git a/gcc/cppmain.c b/gcc/cppmain.c
index 99ca2de..0d42729 100644
--- a/gcc/cppmain.c
+++ b/gcc/cppmain.c
@@ -1,4 +1,4 @@
-/* CPP main program, using CPP Library.
+/* Preprocess only, using cpplib.
    Copyright (C) 1995, 1997, 1998, 1999, 2000, 2001, 2002
    Free Software Foundation, Inc.
    Written by Per Bothner, 1994-95.
@@ -38,10 +38,7 @@ struct printer
   unsigned char printed;	/* Nonzero if something output at line.  */
 };
 
-int main		PARAMS ((int, char **));
-static void general_init PARAMS ((const char *));
-static void do_preprocessing PARAMS ((int, char **));
-static void setup_callbacks PARAMS ((void));
+static void setup_callbacks PARAMS ((cpp_reader *));
 
 /* General output routines.  */
 static void scan_translation_unit PARAMS ((cpp_reader *));
@@ -64,74 +61,15 @@ static void cb_ident	  PARAMS ((cpp_reader *, unsigned int,
 static void cb_file_change PARAMS ((cpp_reader *, const struct line_map *));
 static void cb_def_pragma PARAMS ((cpp_reader *, unsigned int));
 
-const char *progname;		/* Needs to be global.  */
-static cpp_reader *pfile;	/* An opaque handle.  */
 static cpp_options *options;	/* Options of pfile.  */
 static struct printer print;
 
-int
-main (argc, argv)
-     int argc;
-     char **argv;
+/* Preprocess and output.  */
+void
+cpp_preprocess_file (pfile)
+     cpp_reader *pfile;
 {
-  general_init (argv[0]);
-
-  /* Construct a reader with default language GNU C89.  */
-  pfile = cpp_create_reader (CLK_GNUC89);
   options = cpp_get_options (pfile);
-  
-  do_preprocessing (argc, argv);
-
-  if (cpp_destroy (pfile))
-    return FATAL_EXIT_CODE;
-
-  return SUCCESS_EXIT_CODE;
-}
-
-/* Store the program name, and set the locale.  */
-static void
-general_init (argv0)
-     const char *argv0;
-{
-  progname = argv0 + strlen (argv0);
-
-  while (progname != argv0 && ! IS_DIR_SEPARATOR (progname[-1]))
-    --progname;
-
-  xmalloc_set_program_name (progname);
-
-  hex_init ();
-  gcc_init_libintl ();
-}
-
-/* Handle switches, preprocess and output.  */
-static void
-do_preprocessing (argc, argv)
-     int argc;
-     char **argv;
-{
-  int argi = 1;  /* Next argument to handle.  */
-
-  argi += cpp_handle_options (pfile, argc - argi , argv + argi);
-  if (CPP_FATAL_ERRORS (pfile))
-    return;
-
-  if (argi < argc)
-    {
-      cpp_fatal (pfile, "invalid option %s", argv[argi]);
-      return;
-    }
-
-  cpp_post_options (pfile);
-  if (CPP_FATAL_ERRORS (pfile))
-    return;
-
-  /* If cpp_handle_options saw --help or --version on the command
-     line, it will have set pfile->help_only to indicate this.  Exit
-     successfully.  [The library does not exit itself, because
-     e.g. cc1 needs to print its own --help message at this point.]  */
-  if (options->help_only)
-    return;
 
   /* Initialize the printer structure.  Setting print.line to -1 here
      is a trick to guarantee that the first token of the file will
@@ -156,7 +94,7 @@ do_preprocessing (argc, argv)
 	}
     }
 
-  setup_callbacks ();
+  setup_callbacks (pfile);
 
   if (cpp_read_main_file (pfile, options->in_fname, NULL))
     {
@@ -172,21 +110,24 @@ do_preprocessing (argc, argv)
       /* -dM command line option.  Should this be in cpp_finish?  */
       if (options->dump_macros == dump_only)
 	cpp_forall_identifiers (pfile, dump_macro, NULL);
-
-      cpp_finish (pfile);
     }
 
   /* Flush any pending output.  */
   if (print.printed)
     putc ('\n', print.outf);
 
-  if (ferror (print.outf) || fclose (print.outf))
-    cpp_notice_from_errno (pfile, options->out_fname);
+  /* Don't close stdout (dependencies have yet to be output).  */
+  if (print.outf != stdout)
+    {
+      if (ferror (print.outf) || fclose (print.outf))
+	cpp_notice_from_errno (pfile, options->out_fname);
+    }
 }
 
 /* Set up the callbacks as appropriate.  */
 static void
-setup_callbacks ()
+setup_callbacks (pfile)
+     cpp_reader *pfile;
 {
   cpp_callbacks *cb = cpp_get_callbacks (pfile);