Use "/bin/echo -e" instead of shell builtin echo; some shells don't

implement the -e option.

(Thanks to Jim McQuillan for this suggestion.)

src/Makefile

 # message.
 #
 noargs : blib $(BIN)/NIC $(BIN)/gpxe.dsk $(BIN)/gpxe.iso $(BIN)/gpxe.usb
-	@echo '==========================================================='
-	@echo
-	@echo 'To create a bootable floppy, type'
-	@echo '    cat $(BIN)/gpxe.dsk > /dev/fd0'
-	@echo 'where /dev/fd0 is your floppy drive.  This will erase any'
-	@echo 'data already on the disk.'
-	@echo
-	@echo 'To create a bootable USB key, type'
-	@echo '    cat $(BIN)/gpxe.usb > /dev/sdX'
-	@echo 'where /dev/sdX is your USB key, and is *not* a real hard'
-	@echo 'disk on your system.  This will erase any data already on'
-	@echo 'the USB key.'
-	@echo
-	@echo 'To create a bootable CD-ROM, burn the ISO image '
-	@echo '$(BIN)/gpxe.iso to a blank CD-ROM.'
-	@echo
-	@echo 'These images contain drivers for all supported cards.  You'
-	@echo 'can build more customised images, and ROM images, using'
-	@echo '    make bin/<rom-name>.<output-format>'
-	@echo
-	@echo '==========================================================='
+	@$(ECHO) '==========================================================='
+	@$(ECHO)
+	@$(ECHO) 'To create a bootable floppy, type'
+	@$(ECHO) '    cat $(BIN)/gpxe.dsk > /dev/fd0'
+	@$(ECHO) 'where /dev/fd0 is your floppy drive.  This will erase any'
+	@$(ECHO) 'data already on the disk.'
+	@$(ECHO)
+	@$(ECHO) 'To create a bootable USB key, type'
+	@$(ECHO) '    cat $(BIN)/gpxe.usb > /dev/sdX'
+	@$(ECHO) 'where /dev/sdX is your USB key, and is *not* a real hard'
+	@$(ECHO) 'disk on your system.  This will erase any data already on'
+	@$(ECHO) 'the USB key.'
+	@$(ECHO)
+	@$(ECHO) 'To create a bootable CD-ROM, burn the ISO image '
+	@$(ECHO) '$(BIN)/gpxe.iso to a blank CD-ROM.'
+	@$(ECHO)
+	@$(ECHO) 'These images contain drivers for all supported cards.  You'
+	@$(ECHO) 'can build more customised images, and ROM images, using'
+	@$(ECHO) '    make bin/<rom-name>.<output-format>'
+	@$(ECHO)
+	@$(ECHO) '==========================================================='
 
 # Locations of utilities
 #
+ECHO		?= /bin/echo -e
 HOST_CC		?= gcc
 CPP		?= gcc -E -Wp,-Wall
 RM		?= rm -f
 #
 OBJ_CFLAGS	= $(CFLAGS_$(OBJECT)) -DOBJECT=$(subst -,_,$(OBJECT))
 $(BIN)/%.flags :
-	@echo $(OBJ_CFLAGS)
+	@$(ECHO) $(OBJ_CFLAGS)
 
 # Rules for specific object types.
 #

src/Makefile.housekeeping

 		   -DVERSION=\"$(VERSION)\"
 IDENT		= '$(@F) $(VERSION) (GPL) etherboot.org'
 version :
-	@echo $(VERSION)
+	@$(ECHO) $(VERSION)
 
 # Check for tools that can cause failed builds
 #
 .toolcheck : Makefile Config
 	@if $(CC) -v 2>&1 | grep -is 'gcc version 2\.96' > /dev/null; then \
-		echo 'gcc 2.96 is unsuitable for compiling Etherboot'; \
-		echo 'Use gcc 2.95 or gcc 3.x instead'; \
+		$(ECHO) 'gcc 2.96 is unsuitable for compiling Etherboot'; \
+		$(ECHO) 'Use gcc 2.95 or gcc 3.x instead'; \
 		exit 1; \
 	fi
 	@if [ `perl -e 'use bytes; print chr(255)' | wc -c` = 2 ]; then \
-		echo 'Your Perl version has a Unicode handling bug'; \
-		echo 'Execute this command before compiling Etherboot:'; \
-		echo 'export LANG=$${LANG%.UTF-8}'; \
+		$(ECHO) 'Your Perl version has a Unicode handling bug'; \
+		$(ECHO) 'Execute this command before compiling Etherboot:'; \
+		$(ECHO) 'export LANG=$${LANG%.UTF-8}'; \
 		exit 1; \
 	fi
 	@$(TOUCH) $@
 VERYCLEANUP	+= .toolcheck
 
-# Check for correct syntax for echo -e
-#
-ifeq ($(shell echo '\0101'),A)
-ECHO_E = echo
-else
-ECHO_E = echo -e
-endif
-
 # Build verbosity
 #
 ifeq ($(V),1)
 
 # Check for an old version of gas (binutils 2.9.1)
 #
-OLDGAS	:= $(shell $(AS) --version | grep -q '2\.9\.1' && echo -DGAS291)
+OLDGAS	:= $(shell $(AS) --version | grep -q '2\.9\.1' && $(ECHO) -DGAS291)
 CFLAGS	+= $(OLDGAS)
 oldgas :
-	@echo $(oldgas)
+	@$(ECHO) $(oldgas)
 
 # compiler.h is needed for our linking and debugging system
 #
 
 # SRCDIRS lists all directories containing source files.
 srcdirs :
-	@echo $(SRCDIRS)
+	@$(ECHO) $(SRCDIRS)
 
 # SRCS lists all .c or .S files found in any SRCDIR
 #
 SRCS	+= $(wildcard $(patsubst %,%/*.c,$(SRCDIRS)))
 SRCS	+= $(wildcard $(patsubst %,%/*.S,$(SRCDIRS)))
 srcs :
-	@echo $(SRCS)
+	@$(ECHO) $(SRCS)
 
 # AUTO_SRCS lists all files in SRCS that are not mentioned in
 # NON_AUTO_SRCS.  Files should be added to NON_AUTO_SRCS if they
 #
 AUTO_SRCS = $(filter-out $(NON_AUTO_SRCS),$(SRCS))
 autosrcs :
-	@echo $(AUTO_SRCS)
+	@$(ECHO) $(AUTO_SRCS)
 
 # We automatically generate rules for any file mentioned in AUTO_SRCS
 # using the following set of templates.  It would be cleaner to use
 #
 define src_template
 
-	@echo "Generating Makefile rules for $(1)"
+	@$(ECHO) "Generating Makefile rules for $(1)"
 	@$(MKDIR) -p $(dir $(2))
 	@$(RM) $(2)
 	@$(TOUCH) $(2)
 	@$(CPP) $(CFLAGS) $(CFLAGS_$(3)) $(CFLAGS_$(4)) -DOBJECT=$(4) \
 		-Wno-error -M $(1) -MT "$(4)_DEPS" -MG -MP | \
 		sed 's/_DEPS\s*:/_DEPS =/' >> $(2)
-	@$(ECHO_E) '\n$$(BIN)/$(4).o : $(1) $$(MAKEDEPS) $$($(4)_DEPS)' \
-		 '\n\t$$(QM)echo "  [BUILD] $$@"\n' \
+	@$(ECHO) '\n$$(BIN)/$(4).o : $(1) $$(MAKEDEPS) $$($(4)_DEPS)' \
+		 '\n\t$$(QM)$(ECHO) "  [BUILD] $$@"\n' \
 		 '\n\t$$(RULE_$(3))\n' \
 		 '\nBOBJS += $$(BIN)/$(4).o\n' \
 		 $(foreach TGT,$(DEBUG_TARGETS), \
 		    $(if $(RULE_$(3)_to_$(TGT)), \
 		    '\n$$(BIN)/$(4).$(TGT) : $(1) $$(MAKEDEPS) $$($(4)_DEPS)' \
-		    '\n\t$$(QM)echo "  [BUILD] $$@"\n' \
+		    '\n\t$$(QM)$(ECHO) "  [BUILD] $$@"\n' \
 		    '\n\t$$(RULE_$(3)_to_$(TGT))\n' \
 		    '\n$(TGT)_OBJS += $$(BIN)/$(4).$(TGT)\n' ) ) \
 		 '\n$(2) : $$($(4)_DEPS)\n' \
 # Rule to generate the Makefile rules files to be included
 #
 $(BIN)/deps/%.d : % $(MAKEDEPS) $(PARSEROM)
-	$(if $(filter $(AUTO_SRCS),$<),$(call src_template,$<,$@,$(subst .,,$(suffix $<)),$(basename $(notdir $<))),@echo 'ERROR: $< is not an AUTO_SRC' ; exit 1)
+	$(if $(filter $(AUTO_SRCS),$<),$(call src_template,$<,$@,$(subst .,,$(suffix $<)),$(basename $(notdir $<))),@$(ECHO) 'ERROR: $< is not an AUTO_SRC' ; exit 1)
 
 # Calculate and include the list of Makefile rules files
 #
 AUTO_DEPS	= $(patsubst %,$(BIN)/deps/%.d,$(AUTO_SRCS))
 include $(AUTO_DEPS)
 autodeps :
-	@echo $(AUTO_DEPS)
+	@$(ECHO) $(AUTO_DEPS)
 VERYCLEANUP	+= $(BIN)/deps
 
 # The following variables are created by the Makefile rules files
 #
 bobjs :
-	@echo $(BOBJS)
+	@$(ECHO) $(BOBJS)
 drivers :
-	@echo $(DRIVERS)
+	@$(ECHO) $(DRIVERS)
 .PHONY : drivers
 roms :
-	@echo $(ROMS)
+	@$(ECHO) $(ROMS)
 
 # Generate the NIC file from the parsed source files.  The NIC file is
 # only for rom-o-matic.
 #
 $(BIN)/NIC : $(AUTO_DEPS)
-	@echo '# This is an automatically generated file, do not edit' > $@
-	@echo '# It does not affect anything in the build, ' \
+	@$(ECHO) '# This is an automatically generated file, do not edit' > $@
+	@$(ECHO) '# It does not affect anything in the build, ' \
 	     'it is only for rom-o-matic' >> $@
-	@echo >> $@
+	@$(ECHO) >> $@
 	@perl -ne 'chomp; print "$$1\n" if /\# NIC\t(.*)$$/' $^ >> $@
 CLEANUP		+= $(BIN)/NIC
 
 # Print out all derived information for a given target.
 #
 $(BIN)/%.info :
-	@echo 'Elements             : $(TGT_ELEMENTS)'
-	@echo 'Prefix               : $(TGT_PREFIX)'
-	@echo 'Drivers              : $(TGT_DRIVERS)'
-	@echo 'ROM name             : $(TGT_ROM_NAME)'
-	@echo 'Media                : $(TGT_MEDIA)'
-	@echo
-	@echo 'PCI vendor           : $(TGT_PCI_VENDOR)'
-	@echo 'PCI device           : $(TGT_PCI_DEVICE)'
-	@echo
-	@echo 'LD driver symbols    : $(TGT_LD_DRIVERS)'
-	@echo 'LD prefix symbols    : $(TGT_LD_PREFIX)'
-	@echo 'LD ID symbols        : $(TGT_LD_IDS)'
-	@echo
-	@echo 'LD target flags      : $(TGT_LD_FLAGS)'
-	@echo
-	@echo 'makerom target flags : $(TGT_MAKEROM_FLAGS)'
-	@echo
-	@echo 'Debugging objects    : $(DEBUG_OBJS)'
-	@echo 'Replaced objects     : $(DEBUG_ORIG_OBJS)'
+	@$(ECHO) 'Elements             : $(TGT_ELEMENTS)'
+	@$(ECHO) 'Prefix               : $(TGT_PREFIX)'
+	@$(ECHO) 'Drivers              : $(TGT_DRIVERS)'
+	@$(ECHO) 'ROM name             : $(TGT_ROM_NAME)'
+	@$(ECHO) 'Media                : $(TGT_MEDIA)'
+	@$(ECHO)
+	@$(ECHO) 'PCI vendor           : $(TGT_PCI_VENDOR)'
+	@$(ECHO) 'PCI device           : $(TGT_PCI_DEVICE)'
+	@$(ECHO)
+	@$(ECHO) 'LD driver symbols    : $(TGT_LD_DRIVERS)'
+	@$(ECHO) 'LD prefix symbols    : $(TGT_LD_PREFIX)'
+	@$(ECHO) 'LD ID symbols        : $(TGT_LD_IDS)'
+	@$(ECHO)
+	@$(ECHO) 'LD target flags      : $(TGT_LD_FLAGS)'
+	@$(ECHO)
+	@$(ECHO) 'makerom target flags : $(TGT_MAKEROM_FLAGS)'
+	@$(ECHO)
+	@$(ECHO) 'Debugging objects    : $(DEBUG_OBJS)'
+	@$(ECHO) 'Replaced objects     : $(DEBUG_ORIG_OBJS)'
 
 # List of objects included in the last build of blib.  This is needed
 # in order to correctly rebuild blib whenever the list of objects
 #
 BLIB_LIST	= $(BIN)/.blib.list
 ifneq ($(shell cat $(BLIB_LIST)),$(BLIB_OBJS))
-$(shell echo "$(BLIB_OBJS)" > $(BLIB_LIST))
+$(shell $(ECHO) "$(BLIB_OBJS)" > $(BLIB_LIST))
 endif
 
 $(BLIB_LIST) :
 BLIB		= $(BIN)/blib.a
 $(BLIB) : $(BLIB_OBJS) $(BLIB_LIST) $(MAKEDEPS)
 	$(Q)$(RM) $(BLIB)
-	$(QM)echo "  [AR] $@"
+	$(QM)$(ECHO) "  [AR] $@"
 	$(Q)$(AR) r $@ $(BLIB_OBJS)
 	$(Q)$(RANLIB) $@
 blib : $(BLIB)
 # specified target.
 #
 $(BIN)/%.tmp : $(BLIB) $(MAKEDEPS) $(LDSCRIPT) 
-	$(QM)echo "  [LD] $@"
+	$(QM)$(ECHO) "  [LD] $@"
 	$(Q)$(LD) $(LDFLAGS) -T $(LDSCRIPT) $(TGT_LD_FLAGS) $(BLIB) -o $@ \
 		-Map $(BIN)/$*.tmp.map
 	$(Q)$(OBJDUMP) -ht $@ | $(SORTOBJDUMP) >> $(BIN)/$*.tmp.map
 # Extract compression information from intermediate object file
 #
 $(BIN)/%.zinfo : $(BIN)/%.tmp
-	$(QM)echo "  [ZINFO] $@"
+	$(QM)$(ECHO) "  [ZINFO] $@"
 	$(Q)$(OBJCOPY) -O binary -j .zinfo $< $@
 
 # Build raw binary file from intermediate object file
 #
 $(BIN)/%.bin : $(BIN)/%.tmp
-	$(QM)echo "  [BIN] $@"
+	$(QM)$(ECHO) "  [BIN] $@"
 	$(Q)$(OBJCOPY) -O binary -R .zinfo $< $@
 
 # Compress raw binary file
 #
 $(BIN)/%.zbin : $(BIN)/%.bin $(BIN)/%.zinfo $(ZBIN)
-	$(QM)echo "  [ZBIN] $@"
+	$(QM)$(ECHO) "  [ZBIN] $@"
 	$(Q)$(ZBIN) $(BIN)/$*.bin $(BIN)/$*.zinfo > $@
 
 # Build bochs symbol table
 # much difference to the overall build time.
 
 media :
-	@echo $(MEDIA)
+	@$(ECHO) $(MEDIA)
 
 AUTO_MEDIA	= $(filter-out $(NON_AUTO_MEDIA),$(MEDIA))
 automedia :
-	@echo $(AUTO_MEDIA)
+	@$(ECHO) $(AUTO_MEDIA)
 
 # media_template : create Makefile rules for specified media
 #
 #
 define media_template
 
-	@echo "Generating Makefile rules for $(1) media"
+	@$(ECHO) "Generating Makefile rules for $(1) media"
 	@$(MKDIR) -p $(dir $(2))
 	@$(RM) $(2)
 	@$(TOUCH) $(2)
-	@$(ECHO_E) '$$(BIN)/%.$(1) : $$(BIN)/%.$(1).zbin' \
-		  '\n\t$$(QM)echo "  [FINISH] $$@"' \
+	@$(ECHO) '$$(BIN)/%.$(1) : $$(BIN)/%.$(1).zbin' \
+		  '\n\t$$(QM)$(ECHO) "  [FINISH] $$@"' \
 		  '\n\t$$(Q)$$(CP) $$< $$@' \
 		  '\n\t$$(Q)$$(FINALISE_$(1))' \
 		> $(2)
 $(BIN)/deps/%.media.d : $(MAKEDEPS)
 	$(if $(filter $(AUTO_MEDIA),$*), \
 		$(call media_template,$*,$@), \
-		@echo 'ERROR: $* is not an AUTO_MEDIA' ; exit 1)
+		@$(ECHO) 'ERROR: $* is not an AUTO_MEDIA' ; exit 1)
 
 # Calculate and include the list of Makefile rules files
 #
 MEDIA_DEPS		= $(patsubst %,$(BIN)/deps/%.media.d,$(AUTO_MEDIA))
 mediadeps :
-	@echo $(MEDIA_DEPS)
+	@$(ECHO) $(MEDIA_DEPS)
 include $(MEDIA_DEPS)
 
 # The "allXXXs" targets for each suffix
 # The compression utilities
 #
 $(NRV2B) : util/nrv2b.c $(MAKEDEPS)
-	$(QM)echo "  [HOSTCC] $@"
+	$(QM)$(ECHO) "  [HOSTCC] $@"
 	$(Q)$(HOST_CC) -O2 -DENCODE -DDECODE -DMAIN -DVERBOSE -DNDEBUG \
 		       -DBITSIZE=32 -DENDIAN=0 -o $@ $<
 CLEANUP	+= $(NRV2B)
 
 $(ZBIN) : util/zbin.c util/nrv2b.c $(MAKEDEPS)
-	$(QM)echo "  [HOSTCC] $@"
+	$(QM)$(ECHO) "  [HOSTCC] $@"
 	$(Q)$(HOST_CC) -O2 -o $@ $<
 CLEANUP += $(ZBIN)
 
 BUILDSERIAL_NEXT	= config/.buildserial.next
 
 $(BUILDSERIAL_NOW) $(BUILDSERIAL_NEXT) :
-	echo 1 > $@
+	$(ECHO) 1 > $@
 
 $(BUILDSERIAL_H) : $(BUILDSERIAL_NOW) $(BUILDSERIAL_NEXT)
-	echo '#define BUILD_SERIAL_NUM $(shell cat $<)' > $@
+	$(ECHO) '#define BUILD_SERIAL_NUM $(shell cat $<)' > $@
 
 ifeq ($(filter bs,$(MAKECMDGOALS)),bs)
 $(shell diff -q $(BUILDSERIAL_NOW) $(BUILDSERIAL_NEXT) > /dev/null || \
 endif
 
 bs : $(BUILDSERIAL_NOW)
-	@echo $$(( $(shell cat $<) + 1 )) > $(BUILDSERIAL_NEXT)
-	@echo "Build serial number is $(shell cat $<)"
+	@$(ECHO) $$(( $(shell cat $<) + 1 )) > $(BUILDSERIAL_NEXT)
+	@$(ECHO) "Build serial number is $(shell cat $<)"
 
 # List of available architectures
 #
 ARCHS	= $(filter-out CVS,$(patsubst arch/%,%,$(wildcard arch/*)))
 archs :
-	@echo $(ARCHS)
+	@$(ECHO) $(ARCHS)
 
 OTHER_ARCHS	= $(filter-out $(ARCH),$(ARCHS))
 otherarchs :
-	@echo $(OTHER_ARCHS)
+	@$(ECHO) $(OTHER_ARCHS)
 
 # Build the TAGS file for emacs
 #
 	@if [ -n "$$BROWSER" ] ; then \
 		( $$BROWSER $(BIN)/doc/html/index.html & ) ; \
 	else \
-		echo "Documentation index in $(BIN)/doc/html/index.html" ; \
+		$(ECHO) "Documentation index in $(BIN)/doc/html/index.html" ; \
 	fi
 
 # Clean-up
 # Make clean tarballs for release
 
 gpxe-tarball : ../VERSION
-	(echo -n $(VERSION) ''; date -u +'%Y-%m-%d') > ../VERSION
+	($(ECHO) -n $(VERSION) ''; date -u +'%Y-%m-%d') > ../VERSION
 	$(RM) -r /tmp/gpxe/gpxe-$(VERSION)
 	mkdir -p /tmp/gpxe/gpxe-$(VERSION)
 	cp -rP .. /tmp/gpxe/gpxe-$(VERSION)