Partially revert/redo 2003-10-01 change; fix -fworking-directory.

	* c-ppoutput.c (pp_dir_change):  New function.
	* c-common.h (pp_dir_change):  New declaration.
	* cpplib.h (struct cpp_options):  Remove working_directory field.
	* cppinit.c (cpp_find_main_file, cpp_push_main_file):  Merge back to
	(cpp_read_main_file):  as before 10-01.  Call _cpp_stack_file.
	Don't handle -fworking_directory here, but in c_common_post_options.
	(read_original_directory): Don't back up when done.
	Don't clear no-longer used working_directory flag.
	* cpplib.h:  Update declarations to match.
	* c-lex.c (cb_dir_change):  Move to c-opts.c.
	(init_c_lex):  Don't set dir_change callback here, since we want
	to set it even if flag_preprocess_only.
	* c-opts.c (cb_dir_change):  Function moved from c-lex.c.
	(c_common_post_options):  Set dir_change callback.
	Call pp_dir_change if approporiate.
	(finish_options):  Don't call cpp_find_main_file here.	Hence remove
	unneeded parameter and result. Do LC_RENAME for <built-in>.
	(c_common_post_options):  Call cpp_read_main_file here instead.
	(c_common_init):  Update accordingly.
	(push_command_line_include):  Don't cpp_push_main_file.
	Do LC_RENAME rather than LC_LEASE to get back to main file.
	Compared to pre-10-01 version, inline cpp_rename_to_main_file.
	(c_common_parse_file):  Call cpp_read_main_file for subsequent main
	files, but call finish_options for all files.
	* c-opts.c (sanitize_cpp_opts):  Don't set cpp_opts->working_directory.
	* fix-header.c (read_scan_file):  Call cpp_read_main_file instead of
	cpp_find_main_file + cpp_push_main_file.
	* c-lex.c (fe_file_change):  Don't set main_input_filename here.
	* opts.c (handle_options):  Only set main_input_filename first time.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@77303 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 41 insertions, 25 deletions

diff --git a/gcc/c-opts.c b/gcc/c-opts.c
index c89ba0040e6..6fbfd1cee6c 100644
--- a/gcc/c-opts.c
+++ b/gcc/c-opts.c
@@ -108,7 +108,8 @@ 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 bool finish_options (const char *);
+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
@@ -1053,8 +1054,10 @@ c_common_handle_option (size_t scode, const char *arg, int value)
 
 /* Post-switch processing.  */
 bool
-c_common_post_options (const char **pfilename ATTRIBUTE_UNUSED)
+c_common_post_options (const char **pfilename)
 {
+  struct cpp_callbacks *cb;
+
   /* Canonicalize the input and output filenames.  */
   if (in_fnames == NULL)
     {
@@ -1142,7 +1145,9 @@ c_common_post_options (const char **pfilename ATTRIBUTE_UNUSED)
       input_line = 0;
     }
 
-  cpp_get_callbacks (parse_in)->file_change = cb_file_change;
+  cb = cpp_get_callbacks (parse_in);
+  cb->file_change = cb_file_change;
+  cb->dir_change = cb_dir_change;
   cpp_post_options (parse_in);
 
   saved_lineno = input_line;
@@ -1152,6 +1157,14 @@ c_common_post_options (const char **pfilename ATTRIBUTE_UNUSED)
      immediately.  */
   errorcount += cpp_errors (parse_in);
 
+  *pfilename = this_input_filename
+    = cpp_read_main_file (parse_in, in_fnames[0]);
+  if (this_input_filename == NULL)
+    return true;
+
+  if (flag_preprocess_only && flag_working_directory)
+    pp_dir_change (parse_in, get_src_pwd ());
+
   return flag_preprocess_only;
 }
 
@@ -1176,8 +1189,8 @@ c_common_init (void)
 
   if (flag_preprocess_only)
     {
-      if (finish_options (in_fnames[0]))
-	preprocess_file (parse_in);
+      finish_options ();
+      preprocess_file (parse_in);
       return false;
     }
 
@@ -1211,10 +1224,12 @@ c_common_parse_file (int set_yydebug ATTRIBUTE_UNUSED)
 
 	  /* Reset cpplib's macros and start a new file.  */
 	  cpp_undef_all (parse_in);
+	  main_input_filename = this_input_filename
+	    = cpp_read_main_file (parse_in, in_fnames[file_index]);
+	  if (this_input_filename == NULL)
+	    break;
 	}
-
-      if (! finish_options(in_fnames[file_index]))
-	break;
+      finish_options ();
       if (file_index == 0)
 	pch_init();
       c_parse_file ();
@@ -1355,8 +1370,6 @@ sanitize_cpp_opts (void)
      actually output the current directory?  */
   if (flag_working_directory == -1)
     flag_working_directory = (debug_info_level != DINFO_LEVEL_NONE);
-  cpp_opts->working_directory
-    = flag_preprocess_only && flag_working_directory;
 }
 
 /* Add include path with a prefix at the front of its name.  */
@@ -1379,21 +1392,15 @@ add_prefixed_path (const char *suffix, size_t chain)
   add_path (path, chain, 0);
 }
 
-/* Handle -D, -U, -A, -imacros, and the first -include.  
-   TIF is the input file to which we will return after processing all
-   the includes.  Returns true on success.  */
-static bool
-finish_options (const char *tif)
+/* Handle -D, -U, -A, -imacros, and the first -include.  */
+static void
+finish_options (void)
 {
-  this_input_filename = tif;
-  if (! cpp_find_main_file (parse_in, this_input_filename))
-    return false;
-
   if (!cpp_opts->preprocessed)
     {
       size_t i;
 
-      cpp_change_file (parse_in, LC_ENTER, _("<built-in>"));
+      cpp_change_file (parse_in, LC_RENAME, _("<built-in>"));
       cpp_init_builtins (parse_in, flag_hosted);
       c_cpp_builtins (parse_in);
 
@@ -1443,7 +1450,6 @@ finish_options (const char *tif)
 
   include_cursor = 0;
   push_command_line_include ();
-  return true;
 }
 
 /* Give CPP the next file given by -include, if any.  */
@@ -1462,12 +1468,15 @@ push_command_line_include (void)
   if (include_cursor == deferred_count)
     {
       include_cursor++;
-      /* Restore the line map from <command line>.  */
-      if (! cpp_opts->preprocessed)
-	cpp_change_file (parse_in, LC_LEAVE, NULL);
       /* -Wunused-macros should only warn about macros defined hereafter.  */
       cpp_opts->warn_unused_macros = warn_unused_macros;
-      cpp_push_main_file (parse_in);
+      /* Restore the line map from <command line>.  */
+      if (! cpp_opts->preprocessed)
+	cpp_change_file (parse_in, LC_RENAME, main_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;
     }
 }
 
@@ -1485,6 +1494,13 @@ cb_file_change (cpp_reader *pfile ATTRIBUTE_UNUSED,
     push_command_line_include ();
 }
 
+void
+cb_dir_change (cpp_reader *pfile ATTRIBUTE_UNUSED, const char *dir)
+{
+  if (! set_src_pwd (dir))
+    warning ("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