* Makefile.am (DEFS): Added. automake adds -I options to DEFS,

and we don't want that.
(INCLUDES): Removed all -I options except for the root source
directory and the root build directory.

* *.*: Change includes so that they always use the "prefixes"
libguile/, qt/, guile-readline/, or libltdl/.
(Thanks to Tim Mooney.)

libguile/tag.c

@@ -44,11 +44,11 @@
 
 
 #include <stdio.h>
-#include "_scm.h"
-#include "chars.h"
-#include "struct.h"
+#include "libguile/_scm.h"
+#include "libguile/chars.h"
+#include "libguile/struct.h"
 
-#include "tag.h"
+#include "libguile/tag.h"
 
 
 SCM_CONST_LONG (scm_utag_immediate_integer, "utag_immediate_integer", 0);
@@ -215,7 +215,7 @@ SCM_DEFINE (scm_tag, "tag", 1, 0, 0,
 void
 scm_init_tag ()
 {
-#include "tag.x"
+#include "libguile/tag.x"
 }