* coretypes.h: Include machmode.h, signop.h, wide-int.h, double-int.h,
	real.h, and fixed-value.h when included in host source files, identified
	by the presence of config.h in the include chain.
	* double-int.h: Remove redundant #includes listed above.
	* fixed-value.h: Likewise.
	* real.h: Likewise.
	* wide-int.h: Likewise.
	* inchash.h: Likewise.
	* rtl.h: Add some include files When included from a generator file.
	* target.h: Remove wide-int.h and insn-modes.h from the include list.
	* internal-fn.h: Don't include coretypes.h.


Index: coretypes.h
===================================================================
--- coretypes.h	(revision 223875)
+++ coretypes.h	(working copy)
@@ -299,4 +299,14 @@
 typedef unsigned char uchar;
 #endif
 
+/* Most host source files will require the following headers.  */
+#ifdef GCC_CONFIG_H
+#include "machmode.h"
+#include "signop.h"
+#include "wide-int.h" 
+#include "double-int.h"
+#include "real.h"
+#include "fixed-value.h"
+#endif
+
 #endif /* coretypes.h */
Index: double-int.h
===================================================================
--- double-int.h	(revision 223875)
+++ double-int.h	(working copy)
@@ -20,8 +20,6 @@
 #ifndef DOUBLE_INT_H
 #define DOUBLE_INT_H
 
-#include "wide-int.h"
-
 /* A large integer is currently represented as a pair of HOST_WIDE_INTs.
    It therefore represents a number with precision of
    2 * HOST_BITS_PER_WIDE_INT bits (it is however possible that the
Index: fixed-value.h
===================================================================
--- fixed-value.h	(revision 223875)
+++ fixed-value.h	(working copy)
@@ -20,10 +20,6 @@
 #ifndef GCC_FIXED_VALUE_H
 #define GCC_FIXED_VALUE_H
 
-#include "machmode.h"
-#include "real.h"
-#include "double-int.h"
-
 struct GTY(()) fixed_value
 {
   double_int data;		/* Store data up to 2 wide integers.  */
Index: real.h
===================================================================
--- real.h	(revision 223875)
+++ real.h	(working copy)
@@ -20,11 +20,6 @@
 #ifndef GCC_REAL_H
 #define GCC_REAL_H
 
-#include "machmode.h"
-#include "signop.h"
-#include "wide-int.h"
-#include "insn-modes.h"
-
 /* An expanded form of the represented number.  */
 
 /* Enumerate the special cases of numbers that we encounter.  */
Index: wide-int.h
===================================================================
--- wide-int.h	(revision 223875)
+++ wide-int.h	(working copy)
@@ -216,11 +216,6 @@
    the same result as X + X; the precision of the shift amount Y
    can be arbitrarily different from X.  */
 
-#include "system.h"
-#include "hwint.h"
-#include "signop.h"
-#include "insn-modes.h"
-
 /* The MAX_BITSIZE_MODE_ANY_INT is automatically generated by a very
    early examination of the target's mode file.  The WIDE_INT_MAX_ELTS
    can accomodate at least 1 more bit so that unsigned numbers of that
Index: inchash.h
===================================================================
--- inchash.h	(revision 223875)
+++ inchash.h	(working copy)
@@ -20,13 +20,6 @@
 #ifndef INCHASH_H
 #define INCHASH_H 1
 
-#ifdef GENERATOR_FILE
-#include "bconfig.h"
-#else
-#include "config.h"
-#endif
-#include "system.h"
-#include "coretypes.h"
 #include "hashtab.h"
 
 /* This file implements an incremential hash function ADT, to be used
Index: rtl.h
===================================================================
--- rtl.h	(revision 223875)
+++ rtl.h	(working copy)
@@ -20,15 +20,23 @@
 #ifndef GCC_RTL_H
 #define GCC_RTL_H
 
+/* This file is occasionally included by generator files which expect
+   machmode.h and other files to exist and would not normally have been
+   included by coretypes.h.  */
+#ifdef GENERATOR_FILE
+#include "machmode.h"     
+#include "signop.h"
+#include "wide-int.h"
+#include "double-int.h"
+#include "real.h"
+#include "fixed-value.h"
+#endif  /* GENERATOR_FILE */
+
 #include "statistics.h"
-#include "machmode.h"
 #include "input.h"
-#include "real.h"
 #include "vec.h"
-#include "fixed-value.h"
 #include "alias.h"
 #include "hashtab.h"
-#include "wide-int.h"
 #include "flags.h"
 #include "is-a.h"
 
Index: target.h
===================================================================
--- target.h	(revision 223875)
+++ target.h	(working copy)
@@ -48,9 +48,7 @@
 #ifndef GCC_TARGET_H
 #define GCC_TARGET_H
 
-#include "insn-modes.h"
 #include "insn-codes.h"
-#include "wide-int.h"
 #include "tm.h"
 #include "hard-reg-set.h"
 
Index: internal-fn.h
===================================================================
--- internal-fn.h	(revision 223875)
+++ internal-fn.h	(working copy)
@@ -20,8 +20,6 @@
 #ifndef GCC_INTERNAL_FN_H
 #define GCC_INTERNAL_FN_H
 
-#include "coretypes.h"
-
 /* Initialize internal function tables.  */
 
 extern void init_internal_fns ();