2008-05-20  Nathan Sidwell  <nathan@codesourcery.com>

	* c-incpath.c (INO_T_EQ): Do not define on non-inode systems.
	(DIRS_EQ): New.
	(remove_duplicates): Do not set inode on non-inode systems.  Use
	DIRS_EQ.

Index: c-incpath.c
===================================================================
--- c-incpath.c	(revision 135602)
+++ c-incpath.c	(working copy)
@@ -37,15 +37,18 @@
 #ifdef VMS
 # define INO_T_EQ(A, B) (!memcmp (&(A), &(B), sizeof (A)))
 # define INO_T_COPY(DEST, SRC) memcpy(&(DEST), &(SRC), sizeof (SRC))
-#else
-# if (defined _WIN32 && !defined (_UWIN)) || defined __MSDOS__
-#  define INO_T_EQ(A, B) 0
-# else
-#  define INO_T_EQ(A, B) ((A) == (B))
-# endif
+#elif !((defined _WIN32 && !defined (_UWIN)) || defined __MSDOS__)
+# define INO_T_EQ(A, B) ((A) == (B))
 # define INO_T_COPY(DEST, SRC) (DEST) = (SRC)
 #endif
 
+#if defined INO_T_EQ
+#define DIRS_EQ(A, B) ((A)->dev == (B)->dev \
+	&& INO_T_EQ((A)->ino, (B)->ino))
+#else
+#define DIRS_EQ(A, B) (!strcasecmp ((A)->name, (B)->name))
+#endif
+
 static const char dir_separator_str[] = { DIR_SEPARATOR, 0 };
 
 static void add_env_var_paths (const char *, int);
@@ -241,14 +244,15 @@ remove_duplicates (cpp_reader *pfile, st
 			     "%s: not a directory", cur->name);
       else
 	{
+#if defined (INO_T_COPY)
 	  INO_T_COPY (cur->ino, st.st_ino);
 	  cur->dev  = st.st_dev;
+#endif
 
 	  /* Remove this one if it is in the system chain.  */
 	  reason = REASON_DUP_SYS;
 	  for (tmp = system; tmp; tmp = tmp->next)
-	   if (INO_T_EQ (tmp->ino, cur->ino) && tmp->dev == cur->dev
-	       && cur->construct == tmp->construct)
+	   if (DIRS_EQ (tmp, cur) && cur->construct == tmp->construct)
 	      break;
 
 	  if (!tmp)
@@ -256,16 +260,14 @@ remove_duplicates (cpp_reader *pfile, st
 	      /* Duplicate of something earlier in the same chain?  */
 	      reason = REASON_DUP;
 	      for (tmp = head; tmp != cur; tmp = tmp->next)
-	       if (INO_T_EQ (cur->ino, tmp->ino) && cur->dev == tmp->dev
-		   && cur->construct == tmp->construct)
+	       if (DIRS_EQ (cur, tmp) && cur->construct == tmp->construct)
 		  break;
 
 	      if (tmp == cur
 		  /* Last in the chain and duplicate of JOIN?  */
 		  && !(cur->next == NULL && join
-		       && INO_T_EQ (cur->ino, join->ino)
-		      && cur->dev == join->dev
-		      && cur->construct == join->construct))
+		       && DIRS_EQ (cur, join)
+		       && cur->construct == join->construct))
 		{
 		  /* Unique, so keep this directory.  */
 		  pcur = &cur->next;
@@ -297,8 +299,8 @@ add_sysroot_to_chain (const char *sysroo
 }
 
 /* Merge the four include chains together in the order quote, bracket,
-   system, after.  Remove duplicate dirs (as determined by
-   INO_T_EQ()).
+   system, after.  Remove duplicate dirs (determined in
+   system-specific manner).
 
    We can't just merge the lists and then uniquify them because then
    we may lose directories from the <> search path that should be