Makefile.am: Add makedepend.

libcpp:
	* Makefile.am: Add makedepend.
	* Makefile.in, aclocal.m4: Regenerate.
	* charset.c: Insert a space to avoid a warning.
	* directives.c: Include mkdeps.h.
	(_cpp_handle_directive): Reenable macro expander if appropriate.
	(undefine_macros): Inline body of _cpp_free_definition for speed.
	Do not call undef callback or _cpp_warn_if_unused_macro.
	(cpp_get_deps): New interface.
	* files.c (search_cache): Add pfile argument.  Check for file
	that would be found by "" or <> search here...
	(_cpp_find_file): ...not here.  Correct recorded start_dir of
	files found by directory-of-current-file search that would be
	found by "" or <> search.
	* init.c (cpp_add_dependency_target): Delete.
	* internal.h (struct lexer_state): Add discarding_output flag.
	* lex.c (lex_identifier): Compute hash function while scanning.
	* macro.c (cpp_scan_nooutput): Disable macro expansion outside
	directives.
	* makedepend.c: New file.
	* mkdeps.c (struct deps): Add vpath vector.
	(apply_vpath, deps_add_vpath): New function.
	(deps_free): Free vpath vector.
	(deps_add_dep, deps_add_target): Use apply_vpath.
	* symtab.c (calc_hash): Use HT_HASHSTEP and HT_FINISH.
	(ht_lookup_with_hash): New function.
	* cpplib.h, mkdeps.h: Update prototypes.
	* symtab.h: Update prototypes.
	(HT_HASHSTEP, HT_FINISH): New macros.

gcc:
	* Makefile.in (MKDEPS_H): New shorthand.
	(c-opts.o): Update dependencies.
	* c-opts.c: Include mkdeps.h.
	(handle_deferred_opts): Use cpp_get_deps and deps_add_target,
	not cpp_add_dependency_target.

From-SVN: r82654

1 files changed, 21 insertions, 22 deletions

diff --git a/libcpp/directives.c b/libcpp/directives.c
index f9ff2ce..5a6a342 100644
--- a/libcpp/directives.c
+++ b/libcpp/directives.c
@@ -23,6 +23,7 @@ Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
 #include "system.h"
 #include "cpplib.h"
 #include "internal.h"
+#include "mkdeps.h"
 #include "obstack.h"
 
 /* Chained list of answers to an assertion.  */
@@ -336,8 +337,12 @@ _cpp_handle_directive (cpp_reader *pfile, int indented)
   const directive *dir = 0;
   const cpp_token *dname;
   bool was_parsing_args = pfile->state.parsing_args;
+  bool was_discarding_output = pfile->state.discarding_output;
   int skip = 1;
 
+  if (was_discarding_output)
+    pfile->state.prevent_expansion = 0;
+
   if (was_parsing_args)
     {
       if (CPP_OPTION (pfile, pedantic))
@@ -432,6 +437,8 @@ _cpp_handle_directive (cpp_reader *pfile, int indented)
       pfile->state.parsing_args = 2;
       pfile->state.prevent_expansion = 1;
     }
+  if (was_discarding_output)
+    pfile->state.prevent_expansion = 1;
   return skip;
 }
 
@@ -549,30 +556,13 @@ do_undef (cpp_reader *pfile)
 /* Undefine a single macro/assertion/whatever.  */
 
 static int
-undefine_macros (cpp_reader *pfile, cpp_hashnode *h,
+undefine_macros (cpp_reader *pfile ATTRIBUTE_UNUSED, cpp_hashnode *h,
 		 void *data_p ATTRIBUTE_UNUSED)
 {
-  switch (h->type)
-    {
-    case NT_VOID:
-      break;
-
-    case NT_MACRO:
-      if (pfile->cb.undef)
-        (*pfile->cb.undef) (pfile, pfile->directive_line, h);
-
-      if (CPP_OPTION (pfile, warn_unused_macros))
-        _cpp_warn_if_unused_macro (pfile, h, NULL);
-
-      /* And fall through....  */
-    case NT_ASSERTION:
-      _cpp_free_definition (h);
-      break;
-
-    default:
-      abort ();
-    }
-  h->flags &= ~NODE_POISONED;
+  /* Body of _cpp_free_definition inlined here for speed.
+     Macros and assertions no longer have anything to free.  */
+  h->type = NT_VOID;
+  h->flags &= ~(NODE_POISONED|NODE_BUILTIN|NODE_DISABLED);
   return 1;
 }
 
@@ -1913,6 +1903,15 @@ cpp_set_callbacks (cpp_reader *pfile, cpp_callbacks *cb)
   pfile->cb = *cb;
 }
 
+/* The dependencies structure.  (Creates one if it hasn't already been.)  */
+struct deps *
+cpp_get_deps (cpp_reader *pfile)
+{
+  if (!pfile->deps)
+    pfile->deps = deps_init ();
+  return pfile->deps;
+}
+
 /* Push a new buffer on the buffer stack.  Returns the new buffer; it
    doesn't fail.  It does not generate a file change call back; that
    is the responsibility of the caller.  */