Manual: move Makefile.tools to root directory

Since, Makefile.tools is used by both the testsuite and the manual, it
should be moved to the first common ancestor of the two subdirectories:
the root directory.

Note: also remove testsuite/lib/empty and use noinit when invoking the
ocaml interpreter.

Makefile.tools

@@ -13,6 +13,13 @@
 #*                                                                        *
 #**************************************************************************
 
+# This makefile provides variables for using the in-tree compiler,
+# interpreter, lexer and other associated tools. It is intended to be
+# included within other makefiles.
+# See testsuite/makefiles/Makefile.common, manual/tools/Makefile and
+# manual/manual/tutorials/Makefile as examples.
+# Note that these makefile should define the $(TOPDIR) variable on their
+# own.
 
 WINTOPDIR=`cygpath -m "$(TOPDIR)"`
 
@@ -66,8 +73,7 @@ else
   CUSTOM =
 endif
 
-OCAML=$(OCAMLRUN) $(OTOPDIR)/ocaml $(OCFLAGS) \
-      -init $(OTOPDIR)/testsuite/lib/empty
+OCAML=$(OCAMLRUN) $(OTOPDIR)/ocaml $(OCFLAGS) -noinit
 EXPECT_TEST=$(OCAMLRUN) $(OTOPDIR)/testsuite/tools/expect_test$(EXE)
 ifeq "$(FLEXLINK)" ""
   FLEXLINK_PREFIX=

manual/manual/tutorials/Makefile

@@ -1,7 +1,7 @@
 FILES= coreexamples.tex lablexamples.tex objectexamples.tex moduleexamples.tex advexamples.tex
 
 TOPDIR=../../..
-include $(TOPDIR)/testsuite/makefiles/Makefile.tools
+include $(TOPDIR)/Makefile.tools
 
 CAMLLATEX= $(OCAMLRUN) ../../tools/caml-tex2
 TEXQUOTE=../../tools/texquote2

manual/tools/Makefile

@@ -1,7 +1,6 @@
 TOPDIR=../..
-LD_PATH=$(TOPDIR)/otherlibs/str
 COMPFLAGS=-I $(OTOPDIR)/otherlibs/str -I $(OTOPDIR)/otherlibs/unix
-include $(TOPDIR)/testsuite/makefiles/Makefile.tools
+include $(TOPDIR)/Makefile.tools
 
 CFLAGS=-g -O
 

testsuite/makefiles/Makefile.common

@@ -14,7 +14,7 @@
 #**************************************************************************
 
 TOPDIR=$(BASEDIR)/..
-include $(BASEDIR)/makefiles/Makefile.tools
+include $(TOPDIR)/Makefile.tools
 
 defaultpromote:
 	@for file in *.reference; do \