Fixes for Canadian Cross stuff.

1 files changed, 228 insertions, 43 deletions

diff --git a/test-build.mk b/test-build.mk
index 54c5ae3..bc7ad56 100644
--- a/test-build.mk
+++ b/test-build.mk
@@ -15,6 +15,10 @@
 ### which is the named used for ./configure, and also the prefix for the
 ### various files and directories used in a three stage.
 
+### The variable target may be set for the target of a cross-compilation.
+
+### The variable build may be to build a tree on a machine other than the host.
+
 ifndef host
 error:
 	@echo You must set the variable \"host\" to use this Makefile ; exit 1
@@ -43,7 +47,7 @@ CVS_TAG :=
 CVS_MODULE := latest
 
 ### Historically, this was identical to CVS_TAG.  This is changing.
-RELEASE_TAG := latest-930319
+RELEASE_TAG := latest-930426
 
 ### Historically, binaries were installed here.  This is changing.
 release_root := $(ROOTING)/$(RELEASE_TAG)
@@ -63,6 +67,68 @@ override MFLAGS 	:=
 
 SHELL := /bin/sh
 
+ifdef build
+
+# We are building on a machine other than the host.  We rely upon
+# previously built cross-compilers from the build machine to the host
+# (used to build the executables) and from the build machine to the
+# target (used to build the libraries).
+
+AR		:= $(host)-ar
+AR_FOR_TARGET	:= $(target)-ar
+AS		:= $(host)-as
+AS_FOR_TARGET	:= $(target)-as
+CC		:= $(host)-gcc
+CC_FOR_BUILD	:= gcc
+CC_FOR_TARGET	:= $(target)-gcc
+CXX		:= $(host)-c++
+CXX_FOR_TARGET	:= $(target)-c++
+GCC		:= $(host)-gcc -O
+GXX		:= $(host)-g++
+GXX_FOR_TARGET	:= $(target)-g++
+HOST_PREFIX	:= $(build)-
+HOST_PREFIX_1	:= $(build)-
+MAKEINFO	:= makeinfo
+MUNCH_NM	:= $(host)-nm
+NM		:= $(host)-nm
+NM_FOR_TARGET	:= $(target)-nm
+RANLIB		:= $(host)-ranlib
+RANLIB_FOR_TARGET	:= $(target)-ranlib
+
+FLAGS_TO_PASS := \
+	"AR=$(AR)" \
+	"AR_FOR_TARGET=$(AR_FOR_TARGET)" \
+	"AS=$(AS)" \
+	"AS_FOR_TARGET=$(AS_FOR_TARGET)" \
+	"CC=$(CC)" \
+	"CC_FOR_BUILD=$(CC_FOR_BUILD)" \
+	"CC_FOR_TARGET=$(CC_FOR_TARGET)" \
+	"CXX=$(CXX)" \
+	"CXX_FOR_TARGET=$(CXX_FOR_TARGET)" \
+	"CFLAGS=$(CFLAGS)" \
+	"GCC=$(GCC)" \
+	"HOST_PREFIX=$(HOST_PREFIX)" \
+	"HOST_PREFIX_1=$(HOST_PREFIX_1)" \
+	"MAKEINFO=$(MAKEINFO)" \
+	"MF=$(MF)" \
+	"MUNCH_NM=$(MUNCH_NM)" \
+	"NM=$(NM)" \
+	"NM_FOR_TARGET=$(NM_FOR_TARGET)" \
+	"RANLIB=$(RANLIB)" \
+	"RANLIB_FOR_TARGET=$(RANLIB_FOR_TARGET)" \
+	"RELEASE_TAG=$(RELEASE_TAG)" \
+	"TIME=$(TIME)" \
+	"build=$(build)" \
+	"host=$(host)"
+
+# We must pass the build cross host tools in the environment of
+# configure, so that autoconf scripts will run the right programs.
+configenv := AR="$(AR)" CC="$(CC)" RANLIB="$(RANLIB)"
+
+else
+
+# This is a normal build on the host machine.
+
 FLAGS_TO_PASS := \
 	"GCC=$(GCC)" \
 	"CFLAGS=$(CFLAGS)" \
@@ -75,15 +141,15 @@ ifneq  '$(CC)' 'cc'
 FLAGS_TO_PASS := "CC=$(CC)" $(FLAGS_TO_PASS)
 endif
 
+configenv :=
+
+endif
+
 
+# These are the prefixes used for Cygnus builds.
 prefixes	= --prefix=$(release_root) --exec-prefix=$(release_root)/H-$(host)
-relbindir	= $(release_root)/H-$(host)/bin
 
-ifeq ($(host),mips-dec-ultrix)
-configargs	= -with-gnu-as
-else
-configargs	=
-endif
+relbindir	= $(release_root)/H-$(host)/bin
 
 ### general config stuff
 WORKING_DIR 	:= $(host)-objdir
@@ -91,13 +157,33 @@ STAGE1DIR 	:= $(WORKING_DIR).1
 STAGE2DIR 	:= $(WORKING_DIR).2
 STAGE3DIR 	:= $(WORKING_DIR).3
 INPLACEDIR 	:= $(host)-in-place
-HOLESDIR 	:= $(host)-holes
+
+# Arrange to find the needed programs.  If we are building on a
+# machine other than the host, we must find the cross-compilers.
+
+ifdef build
+
+holesys		:= $(build)
+HOLESSTAMP	:= $(holesys)-stamp-holes $(build)-x-$(host)-stamp-holes $(build)-x-$(target)-stamp-holes
+HOLESDIR 	:= $(holesys)-holes
+BUILD_HOST_HOLES_DIR	:= $(build)-x-$(host)-holes
+BUILD_TARGET_HOLES_DIR	:= $(build)-x-$(target)-holes
+
+SET_NATIVE_HOLES := SHELL=sh ; PATH=`pwd`/$(HOLESDIR):`pwd`/$(BUILD_HOST_HOLES_DIR):`pwd`/$(BUILD_TARGET_HOLES_DIR) ; export PATH ; export SHELL ;
+SET_CYGNUS_PATH  := SHELL=sh ; PATH=`pwd`/$(HOLESDIR):`pwd`/$(BUILD_HOST_HOLES_DIR):`pwd`/$(BUILD_TARGET_HOLES_DIR) ; export PATH ; export SHELL ;
+SET_LATEST_PATH  := SHELL=sh ; PATH=/usr/latest/bin:`pwd`/$(HOLESDIR):`pwd`/$(BUILD_HOST_HOLES_DIR):`pwd`/$(BUILD_TARGET_HOLES_DIR) ; export PATH ; export SHELL ;
+
+else
+
+holesys		:= $(host)
+HOLESSTAMP	:= $(holesys)-stamp-holes
+HOLESDIR 	:= $(holesys)-holes
 
 SET_NATIVE_HOLES := SHELL=sh ; PATH=`pwd`/$(HOLESDIR) ; export PATH ; export SHELL ;
 SET_CYGNUS_PATH  := SHELL=sh ; PATH=$(relbindir):`pwd`/$(HOLESDIR) ; export PATH ; export SHELL ;
 SET_LATEST_PATH  := SHELL=sh ; PATH=/usr/latest/bin:`pwd`/$(HOLESDIR) ; export PATH ; export SHELL ;
 
-
+endif
 
 .PHONY: all
 ifdef target
@@ -105,20 +191,42 @@ ifdef target
 ## This is a cross compilation
 ##
 arch 		= $(host)-x-$(target)
-config  	= $(host) -target=$(target)
+config  	= -host=$(host) -target=$(target)
 FLAGS_TO_PASS	:= $(FLAGS_TO_PASS) "target=$(target)"
 
+ifdef build
+all:	do-cygnus do-latest
+build-all: build-cygnus build-latest
+else
 all:	do-native do-latest
 build-all: build-native build-latest
+endif
+
+ifeq ($(target),mips-idt-ecoff)
+configargs	= -with-gnu-as
+else
+configargs	=
+endif
 
 else
 ##
 ## This is a native compilation
 ##
 arch		= $(host)
-config  	= $(host)
+config  	= -host=$(host)
+ifdef build
+all:	do-cygnus do-latest
+else
 all:	$(host)-stamp-3stage-done
+endif
 #all:	in-place do1 do2 do3 comparison
+
+ifeq ($(subst mips-sgi-irix4,mips-dec-ultrix,$(host)),mips-dec-ultrix)
+configargs	= -with-gnu-as
+else
+configargs	=
+endif
+
 endif
 
 NATIVEDIR	:= $(arch)-native-objdir
@@ -130,17 +238,17 @@ everything: 	 do-cross
 #everything: 	in-place do1 do2 do3 comparison do-cygnus 
 
 .PHONY: do-native
-do-native: $(host)-stamp-holes $(arch)-stamp-native
+do-native: $(HOLESSTAMP) $(arch)-stamp-native
 do-native-config: $(arch)-stamp-native-configured
-build-native: $(host)-stamp-holes $(arch)-stamp-native-checked
-config-native: $(host)-stamp-holes $(arch)-stamp-native-configured
+build-native: $(HOLESSTAMP) $(arch)-stamp-native-checked
+config-native: $(HOLESSTAMP) $(arch)-stamp-native-configured
 
-$(arch)-stamp-native: $(host)-stamp-holes
+$(arch)-stamp-native: $(HOLESSTAMP)
 	$(SET_NATIVE_HOLES) $(TIME) $(GNU_MAKE) -f test-build.mk  $(arch)-stamp-native-installed $(FLAGS_TO_PASS) 
 	if [ -f CLEAN_ALL ] ; then rm -rf $(NATIVEDIR) ; else true ; fi
 	touch $(arch)-stamp-native
 
-$(arch)-stamp-native-installed: $(host)-stamp-holes $(arch)-stamp-native-checked
+$(arch)-stamp-native-installed: $(HOLESSTAMP) $(arch)-stamp-native-checked
 	$(SET_NATIVE_HOLES) cd $(NATIVEDIR) ; $(TIME) $(MAKE) $(FLAGS_TO_PASS) install 
 	$(SET_NATIVE_HOLES) cd $(NATIVEDIR) ; $(TIME) $(MAKE) $(FLAGS_TO_PASS) install-info 
 	touch $@
@@ -149,56 +257,58 @@ $(arch)-stamp-native-checked: $(arch)-stamp-native-built
 #	cd $(NATIVEDIR) ; $(TIME) $(MAKE) $(FLAGS_TO_PASS) check 
 	touch $@
 
-$(arch)-stamp-native-built: $(host)-stamp-holes $(arch)-stamp-native-configured
+$(arch)-stamp-native-built: $(HOLESSTAMP) $(arch)-stamp-native-configured
 	$(SET_NATIVE_HOLES) cd $(NATIVEDIR) ; $(TIME) $(MAKE) $(FLAGS_TO_PASS) all 
 	$(SET_NATIVE_HOLES) cd $(NATIVEDIR) ; $(TIME) $(MAKE) $(FLAGS_TO_PASS) info 
 	touch $@
 
-$(arch)-stamp-native-configured: $(host)-stamp-holes
+$(arch)-stamp-native-configured: $(HOLESSTAMP)
 	[ -d $(NATIVEDIR) ] || mkdir $(NATIVEDIR)
-	$(SET_NATIVE_HOLES) cd $(NATIVEDIR) ; $(TIME) ../$(TREE)/configure $(config) -v --srcdir=../$(TREE) $(prefixes) $(configargs)
+	$(SET_NATIVE_HOLES) cd $(NATIVEDIR) ; $(configenv) $(TIME) ../$(TREE)/configure $(config) -v --srcdir=../$(TREE) $(prefixes) $(configargs)
 	touch $@
 
 
 .PHONY: do-cygnus
-do-cygnus: $(host)-stamp-holes $(arch)-stamp-cygnus
-build-cygnus: $(host)-stamp-holes $(arch)-stamp-cygnus-checked
-config-cygnus: $(host)-stamp-holes $(arch)-stamp-cygnus-configured
+do-cygnus: $(HOLESSTAMP) $(arch)-stamp-cygnus
+build-cygnus: $(HOLESSTAMP) $(arch)-stamp-cygnus-checked
+config-cygnus: $(HOLESSTAMP) $(arch)-stamp-cygnus-configured
 
 $(arch)-stamp-cygnus: 
+ifndef build
 	[ -f $(relbindir)/gcc ] || (echo "must have gcc available"; exit 1)
+endif
 	$(SET_CYGNUS_PATH) $(TIME) $(GNU_MAKE) -f test-build.mk $(arch)-stamp-cygnus-installed  $(FLAGS_TO_PASS)
 	if [ -f CLEAN_ALL ] ; then rm -rf $(CYGNUSDIR) ; else true ; fi
 	touch $(arch)-stamp-cygnus
 
-$(arch)-stamp-cygnus-installed:  $(host)-stamp-holes $(arch)-stamp-cygnus-checked
+$(arch)-stamp-cygnus-installed:  $(HOLESSTAMP) $(arch)-stamp-cygnus-checked
 	$(SET_CYGNUS_PATH) cd $(CYGNUSDIR) ; $(TIME) $(MAKE) $(FLAGS_TO_PASS) $(GNUC) install 
 	$(SET_CYGNUS_PATH) cd $(CYGNUSDIR) ; $(TIME) $(MAKE) $(FLAGS_TO_PASS) $(GNUC) install-info
 	touch $@
 
-$(arch)-stamp-cygnus-checked: $(host)-stamp-holes $(arch)-stamp-cygnus-built
+$(arch)-stamp-cygnus-checked: $(HOLESSTAMP) $(arch)-stamp-cygnus-built
 #	cd $(CYGNUSDIR) ; $(TIME) $(MAKE) $(FLAGS_TO_PASS) $(GNUC) check 
 	touch $@
 
-$(arch)-stamp-cygnus-built:  $(host)-stamp-holes $(arch)-stamp-cygnus-configured
+$(arch)-stamp-cygnus-built:  $(HOLESSTAMP) $(arch)-stamp-cygnus-configured
 	$(SET_CYGNUS_PATH) cd $(CYGNUSDIR) ; $(TIME) $(MAKE) $(FLAGS_TO_PASS) $(GNUC) all 
 	$(SET_CYGNUS_PATH) cd $(CYGNUSDIR) ; $(TIME) $(MAKE) $(FLAGS_TO_PASS) $(GNUC) info 
 	touch $@
 
-$(arch)-stamp-cygnus-configured:  $(host)-stamp-holes
+$(arch)-stamp-cygnus-configured:  $(HOLESSTAMP)
 	[ -d $(CYGNUSDIR) ] || mkdir $(CYGNUSDIR)
-	$(SET_CYGNUS_PATH) cd $(CYGNUSDIR) ; $(GNUC) $(TIME) ../$(TREE)/configure $(config) -v --srcdir=../$(TREE) $(prefixes) $(configargs)
+	$(SET_CYGNUS_PATH) cd $(CYGNUSDIR) ; $(GNUC) $(configenv) $(TIME) ../$(TREE)/configure $(config) -v --srcdir=../$(TREE) $(prefixes) $(configargs)
 	touch $@
 
 .PHONY: do-latest
-do-latest: $(host)-stamp-holes $(arch)-stamp-latest
-build-latest: $(host)-stamp-holes $(arch)-stamp-latest-checked
+do-latest: $(HOLESSTAMP) $(arch)-stamp-latest
+build-latest: $(HOLESSTAMP) $(arch)-stamp-latest-checked
 
 $(arch)-stamp-latest:
 	$(SET_LATEST_PATH) $(TIME) $(GNU_MAKE) -f test-build.mk $(arch)-stamp-latest-installed  $(FLAGS_TO_PASS)
 	touch $(arch)-stamp-latest
 
-
+$(arch)-stamp-latest-installed:  $(HOLESSTAMP) $(arch)-stamp-latest-checked
 	$(SET_LATEST_PATH) cd $(LATESTDIR) ; $(TIME) $(MAKE) $(FLAGS_TO_PASS) $(GNUC) install 
 	$(SET_LATEST_PATH) cd $(LATESTDIR) ; $(TIME) $(MAKE) $(FLAGS_TO_PASS) $(GNUC) install-info 
 	touch $@
@@ -214,7 +324,7 @@ $(arch)-stamp-latest-built: $(arch)-stamp-latest-configured
 
 $(arch)-stamp-latest-configured:
 	[ -d $(LATESTDIR) ] || mkdir $(LATESTDIR)
-	$(SET_LATEST_PATH) cd $(LATESTDIR) ; $(GNUC) $(TIME) ../$(TREE)/configure $(config) -v --srcdir=../$(TREE) $(prefixes) $(configargs)
+	$(SET_LATEST_PATH) cd $(LATESTDIR) ; $(GNUC) $(configenv) $(TIME) ../$(TREE)/configure $(config) -v --srcdir=../$(TREE) $(prefixes) $(configargs)
 	touch $@
 
 
@@ -248,7 +358,7 @@ $(host)-stamp-in-place-built: $(host)-stamp-in-place-configured
 	touch $@
 
 $(host)-stamp-in-place-configured: $(host)-stamp-in-place-cp
-	cd $(INPLACEDIR) ; $(TIME) ./configure $(host) -v $(prefixes) $(configargs)
+	cd $(INPLACEDIR) ; $(configenv) $(TIME) ./configure $(config) -v $(prefixes) $(configargs)
 	touch $@
 
 $(host)-stamp-in-place-cp:
@@ -262,9 +372,9 @@ $(host)-stamp-3stage-done: do1 do2 do3 comparison
 
 
 .PHONY: do1
-do1:	    $(host)-stamp-holes $(host)-stamp-stage1
-do1-config: $(host)-stamp-holes $(host)-stamp-stage1-configured
-do1-build:  $(host)-stamp-holes $(host)-stamp-stage1-checked
+do1:	    $(HOLESSTAMP) $(host)-stamp-stage1
+do1-config: $(HOLESSTAMP) $(host)-stamp-stage1-configured
+do1-build:  $(HOLESSTAMP) $(host)-stamp-stage1-checked
 
 $(host)-stamp-stage1:
 	if [ -d $(STAGE1DIR) ] ; then \
@@ -284,7 +394,7 @@ $(host)-stamp-stage1-installed: $(host)-stamp-stage1-checked
 	$(SET_NATIVE_HOLES) cd $(WORKING_DIR) ; $(TIME) $(MAKE) $(FLAGS_TO_PASS) "CFLAGS=$(CFLAGS)" install host=$(host)
 	$(SET_NATIVE_HOLES) cd $(WORKING_DIR) ; $(TIME) $(MAKE) $(FLAGS_TO_PASS) "CFLAGS=$(CFLAGS)" install-info host=$(host)
 ifeq ($(host),rs6000-ibm-aix)
-	rm $(relbindir)/make
+	-rm $(relbindir)/make
 endif
 	touch $@
 
@@ -300,7 +410,7 @@ $(host)-stamp-stage1-built: $(host)-stamp-stage1-configured
 $(host)-stamp-stage1-configured:
 	[ -d $(WORKING_DIR) ] || mkdir $(WORKING_DIR)
 	$(SET_NATIVE_HOLES) cd $(WORKING_DIR) ; \
-	  $(TIME) ../$(TREE)/configure $(host) -v --srcdir=../$(TREE) $(prefixes) $(configargs)
+	  $(configenv) $(TIME) ../$(TREE)/configure $(config) -v --srcdir=../$(TREE) $(prefixes) $(configargs)
 	touch $@
 
 .PHONY: do2
@@ -334,7 +444,7 @@ $(host)-stamp-stage2-built: $(host)-stamp-stage2-configured
 $(host)-stamp-stage2-configured:
 	[ -d $(WORKING_DIR) ] || mkdir $(WORKING_DIR)
 	$(SET_CYGNUS_PATH) cd $(WORKING_DIR) ; \
-	  $(GNUC) $(TIME) ../$(TREE)/configure $(host) -v --srcdir=../$(TREE) $(prefixes) $(configargs)
+	  $(configenv) $(GNUC) $(TIME) ../$(TREE)/configure $(config) -v --srcdir=../$(TREE) $(prefixes) $(configargs)
 	touch $@
 
 .PHONY: do3
@@ -368,7 +478,7 @@ $(host)-stamp-stage3-built: $(host)-stamp-stage3-configured
 $(host)-stamp-stage3-configured:
 	[ -d $(WORKING_DIR) ] || mkdir $(WORKING_DIR)
 	$(SET_CYGNUS_PATH) cd $(WORKING_DIR) ; \
-	  $(GNUC) $(TIME) ../$(TREE)/configure $(host) -v --srcdir=../$(TREE) $(prefixes) $(configargs)
+	  $(configenv) $(GNUC) $(TIME) ../$(TREE)/configure $(config) -v --srcdir=../$(TREE) $(prefixes) $(configargs)
 	touch $@
 
 # These things are needed by a three-stage, but are not included locally.
@@ -418,19 +528,20 @@ HOLES := \
 	touch \
 	tr \
 	true \
+	uname \
 	uudecode \
 	wc \
 	whoami
 
 ### so far only sun make supports VPATH
-ifeq ($(subst sun3,sun4,$(host)),sun4)
+ifeq ($(subst sun3,sun4,$(holesys)),sun4)
 MAKE_HOLE :=
 else
 MAKE_HOLE := make
 endif
 
 ### solaris 2 -- don't use /usr/ucb/cc
-ifeq (sparc-sun-solaris2,$(host))
+ifeq (sparc-sun-solaris2,$(holesys))
 SET_NATIVE_HOLES := SHELL=sh ; PATH=/opt/SUNWspro/bin:`pwd`/$(HOLESDIR) ; export PATH ; export SHELL ;
 HOLE_DIRS := /usr/ccs/bin
 CC_HOLE :=
@@ -460,9 +571,9 @@ PARTIAL_HOLE_DIRS := \
 	/usr/vintage/bin \
 	/usr/unsupported/bin
 
-$(HOLESDIR): $(host)-stamp-holes
+$(HOLESDIR): $(holesys)-stamp-holes
 
-$(host)-stamp-holes:
+$(holesys)-stamp-holes:
 	-rm -rf $(HOLESDIR)
 	-mkdir $(HOLESDIR)
 	@for i in $(HOLES) ; do \
@@ -501,6 +612,80 @@ ifdef NUKEM
 endif
 	touch $@
 
+# Get the cross-tools for build cross host when not building on the host.
+
+BUILD_HOST_HOLES := \
+	byacc \
+	gcc \
+	makeinfo \
+	$(AR) \
+	$(AS) \
+	$(CC) \
+	$(CXX) \
+	$(GXX) \
+	$(NM) \
+	$(RANLIB)
+
+BUILD_HOLES_DIRS := $(PARTIAL_HOLE_DIRS)
+
+$(BUILD_HOST_HOLES_DIR): $(build)-x-$(host)-stamp-holes
+
+$(build)-x-$(host)-stamp-holes:
+	-rm -rf $(BUILD_HOST_HOLES_DIR)
+	-mkdir $(BUILD_HOST_HOLES_DIR)
+	@for i in $(BUILD_HOST_HOLES) ; do \
+		found= ; \
+		for j in $(BUILD_HOLES_DIRS) ; do \
+			if [ -x $$j/$$i ] ; then \
+				ln -s $$j/$$i $(BUILD_HOST_HOLES_DIR) || cp $$j/$$i $(BUILD_HOST_HOLES_DIR) ; \
+				echo $$i from $$j ; \
+				found=t ; \
+				break ; \
+			fi ; \
+		done ; \
+		case "$$found" in \
+		t) ;; \
+		*) echo $$i is NOT found ;; \
+		esac ; \
+	done
+	touch $@
+
+# Get the cross tools for build cross target when not building on the host.
+
+BUILD_TARGET_HOLES := \
+	byacc \
+	gcc \
+	makeinfo \
+	$(AR_FOR_TARGET) \
+	$(AS_FOR_TARGET) \
+	$(CC_FOR_TARGET) \
+	$(CXX_FOR_TARGET) \
+	$(GXX_FOR_TARGET) \
+	$(NM_FOR_TARGET) \
+	$(RANLIB_FOR_TARGET)
+
+$(BUILD_TARGET_HOLES_DIR): $(build)-x-$(target)-stamp-holes
+
+$(build)-x-$(target)-stamp-holes:
+	-rm -rf $(BUILD_TARGET_HOLES_DIR)
+	-mkdir $(BUILD_TARGET_HOLES_DIR)
+	@for i in $(BUILD_TARGET_HOLES) ; do \
+		found= ; \
+		for j in $(BUILD_HOLES_DIRS) ; do \
+			if [ -x $$j/$$i ] ; then \
+				ln -s $$j/$$i $(BUILD_TARGET_HOLES_DIR) || cp $$j/$$i $(BUILD_TARGET_HOLES_DIR) ; \
+				echo $$i from $$j ; \
+				found=t ; \
+				break ; \
+			fi ; \
+		done ; \
+		case "$$found" in \
+		t) ;; \
+		*) echo $$i is NOT found ;; \
+		esac ; \
+	done
+	touch $@
+
 .PHONY: comparison
 comparison: $(host)-stamp-3stage-compared