I got sick and tired of copying goo for multiple files.
This nonsense is the result.  (Too bad mk isn't everywhere.)
<<script>>=
(cat Makefile.nw; echo ""; notangle -t8 -R'generate chunks' Makefile.nw | sh) | notangle -t8 -
<<*>>=
# Copyright 1995-2018 by Norman Ramsey.  All rights reserved.
# See file COPYRIGHT for more information.
#
# Adjust these two lines for your ANSI C compiler
CC=gcc -ansi -pedantic -O -Wall -Werror
CFLAGS=
# If you have Icon, you should use the Icon versions of the noweb pipeline.
# Set LIBSRC=icon
LIBSRC=awk
# If you have no Icon compiler, but do have icont, make ICONC=icont
ICONC=iconc
ICONT=icont

# BIN is where the commands (notangle, noweave, nountangle, noroots) land
# LIB is where the pieces of the pipes (nt, markup, unmarkup) are stored
# MAN is the root of your local man pages directory
# MANEXT is the extension for your commands' man pages (usually 1 or l)
# MAN7EXT is the extension for the nowebstyle man page (usually 7)
# TEXINPUTS is the directory for TeX macro files
# ELISP is the directory for emacs lisp files, or /dev/null not to install
BIN=/usr/local/noweb
LIB=/usr/local/noweb/lib
MAN=/usr/local/noweb/man
MANEXT=1
MAN7EXT=7
TEXINPUTS=/usr/local/tex/inputs
ELISP=/dev/null

# change WEAVE if you want a different version of noweave to be installed
WEAVE=noweave		

# Stop editing.	 No user-serviceable parts below.
SHELL=/bin/sh
CINAME=
CIMSG=
MANDIR=$(MAN)/man$(MANEXT)
MAN7DIR=$(MAN)/man$(MAN7EXT)
CATDIR=$(MAN)/cat$(MANEXT)
CAT7DIR=$(MAN)/cat$(MAN7EXT)
LIBNAME=$(LIB)
TEXNAME=$(TEXINPUTS)

all: 
	cd c; make "CC=$(CC)" "CFLAGS=$(CFLAGS)" all 
	for i in shell lib xdoc tex; do (cd $$i; make all); done
	cd $(LIBSRC); make "ICONT=$(ICONT)" "ICONC=$(ICONC)" all

FAQ: FAQ.html
	sleep 1; html2ascii FAQ.html > FAQ

FAQ.html: $(HOME)/www/noweb/FAQ.html
	rm -f FAQ.html
	/bin/cp $(HOME)/www/noweb/FAQ.html FAQ.html
	chmod -w FAQ.html

install: install-code install-man install-tex install-elisp
uninstall: uninstall-code uninstall-man uninstall-tex uninstall-elisp
	-rmdir $(BIN) $(LIB) 2>/dev/null || true

install-shell:
	mkdir -p $(BIN) $(LIB)
	<<shell binaries>>
	cp shell/tmac.w $(LIB)

uninstall-shell:
	<<uninstall shell binaries>>
	rm -f $(LIB)/tmac.w

install-code: install-shell
	mkdir -p $(BIN) $(LIB)
	strip c/nt c/markup c/mnt c/finduses c/nwmktemp
	cp c/nt c/markup c/mnt c/finduses c/nwmktemp $(LIB)
	cd $(LIBSRC); make ICONT=$(ICONT) ICONC=$(ICONC) LIB=$(LIB) BIN=$(BIN) install
	cd lib; make LIB=$(LIB) install

uninstall-code: uninstall-shell
	rm -f $(LIB)/nt $(LIB)/markup $(LIB)/mnt $(LIB)/finduses 
	cd $(LIBSRC); make ICONT=$(ICONT) ICONC=$(ICONC) LIB=$(LIB) BIN=$(BIN) uninstall
	cd lib; make LIB=$(LIB) uninstall
@ I do the [[<<shell binaries>>]] before [[$(LIBSRC)]] so that the
Icon version of [[htmltoc]], if present, will overwrite the Perl
version.
@
<<generate chunks>>=
for i in noweb notangle '$(WEAVE)' nountangle nodefs noroots nuweb2noweb cpif htmltoc \
	 noroff
do
  echo '@<<shell binaries@>>='
  echo 'sed "s@|LIBDIR|@$(LIBNAME)@"' "shell/$i" '> $(BIN)/'"$i"
  echo 'chmod +x $(BIN)/'"$i"
  echo '@<<uninstall shell binaries@>>='
  echo 'rm -f $(BIN)/'"$i"
done
for i in toroff
do
  echo '@<<shell binaries@>>='
  echo 'sed "s@|LIBDIR|@$(LIBNAME)@"' "shell/$i" '> $(LIB)/'"$i"
  echo 'chmod +x $(LIB)/'"$i"
  echo '@<<uninstall shell binaries@>>='
  echo 'rm -f $(LIB)/'"$i"
done
<<*>>=
install-man:
	mkdir -p $(MAN) $(MANDIR) $(MAN7DIR)
	<<ordinary pages>>
uninstall-man:
	<<uninstall ordinary pages>>
	-rmdir $(MANDIR) $(MAN7DIR) $(MAN) 2>/dev/null || true
@ 
Slackware no longer uses preformatted compressed pages, just
compressed pages.
<<*>>=
install-gzipped-man:
	mkdir -p $(MAN) $(MANDIR) $(MAN7DIR)
	<<compressed pages>>
<<*>>=
install-preformat-man:
	-echo "Warning: install-preformat-man is obsolete, even on Slackware systems" 1>&2
	mkdir -p $(MAN) $(CATDIR) $(CAT7DIR)
	<<preformatted compressed pages>>
<<generate chunks>>=
NORMALPAGES="cpif nodefs noroots noweb noindex nuweb2noweb notangle noroff sl2h htmltoc"
NORMAL7PAGES="nowebstyle nowebfilters"
LINKPAGES="noweave nountangle"


for i in $NORMALPAGES; do
  echo '@<<ordinary pages@>>='
  echo 'sed -e "s@|LIBDIR|@$(LIBNAME)@" -e "s@|TEXINPUTS|@$(TEXNAME)@"' \
	"xdoc/$i.1" '> $(MANDIR)/'"$i"'.$(MANEXT)'
  echo '@<<uninstall ordinary pages@>>='
  echo 'rm -f $(MANDIR)/'"$i"'.$(MANEXT)'
done
for i in $NORMAL7PAGES; do
  echo '@<<ordinary pages@>>='
  echo 'sed -e "s@|LIBDIR|@$(LIBNAME)@" -e "s@|TEXINPUTS|@$(TEXNAME)@"' \
	"xdoc/$i.7" '> $(MAN7DIR)/'"$i"'.$(MAN7EXT)'
  echo '@<<uninstall ordinary pages@>>='
  echo 'rm -f $(MAN7DIR)/'"$i"'.$(MAN7EXT)'
done

for i in $LINKPAGES; do
  echo '@<<ordinary pages@>>='
  echo 'rm -f $(MANDIR)/'"$i"'.$(MANEXT)'
  echo '(cd $(MANDIR); ln notangle.$(MANEXT)' "$i"'.$(MANEXT))'
  echo '@<<uninstall ordinary pages@>>='
  echo 'rm -f $(MANDIR)/'"$i"'.$(MANEXT)'
done

echo '@<<compressed pages@>>='

for i in $NORMALPAGES; do
  echo 'sed -e "s@|LIBDIR|@$(LIBNAME)@" -e "s@|TEXINPUTS|@$(TEXNAME)@"' \
	"xdoc/$i.1" ' | gzip -9 > $(MANDIR)/'"$i"'.$(MANEXT).gz'
done
for i in $NORMAL7PAGES; do
  echo 'sed -e "s@|LIBDIR|@$(LIBNAME)@" -e "s@|TEXINPUTS|@$(TEXNAME)@"' \
	"xdoc/$i.7" ' | gzip -9 > $(MAN7DIR)/'"$i"'.$(MAN7EXT).gz'
done

for i in $LINKPAGES; do
  echo 'rm -f $(MANDIR)/'"$i"'.$(MANEXT).gz'
  echo '(cd $(MANDIR); ln notangle.$(MANEXT).gz' "$i"'.$(MANEXT).gz)'
done

echo '@<<preformatted compressed pages@>>='

for i in $NORMALPAGES; do
  echo 'sed -e "s@|LIBDIR|@$(LIBNAME)@" -e "s@|TEXINPUTS|@$(TEXNAME)@"' \
	"xdoc/$i.txt" ' | gzip > $(CATDIR)/'"$i"'.$(MANEXT).gz'
done
for i in $NORMAL7PAGES; do
  echo 'sed -e "s@|LIBDIR|@$(LIBNAME)@" -e "s@|TEXINPUTS|@$(TEXNAME)@"' \
	"xdoc/$i.txt" ' | gzip > $(CAT7DIR)/'"$i"'.$(MAN7EXT).gz'
done

for i in $LINKPAGES; do
  echo 'rm -f $(CATDIR)/'"$i"'.$(MANEXT).gz'
  echo '(cd $(CATDIR); ln notangle.$(MANEXT).gz' "$i"'.$(MANEXT).gz)'
done
<<*>>=
install-tex:
	mkdir -p $(TEXINPUTS)
	cp tex/nwmac.tex tex/noweb.sty $(TEXINPUTS)
	-texhash || echo "Program texhash not found or failed"

uninstall-tex:
	rm -f $(TEXINPUTS)/nwmac.tex $(TEXINPUTS)/noweb.sty || true

install-elisp:
	if [ "/dev/null" != "$(ELISP)" ]; then mkdir -p $(ELISP); fi
	cp elisp/noweb-mode.el $(ELISP)

uninstall-elisp:
	rm -f $(ELISP)/noweb-mode.el || true
@ 
<<*>>=
checkin:
	for i in lib tex xdoc; do (cd $$i; make "CINAME=$(CINAME)" "CIMSG=$(CIMSG)" checkin); done
	for i in c icon awk; do (cd $$i; ci -l $(CINAME) $(CIMSG) *.nw Makefile); done
	(cd elisp; ci -l $(CINAME) $(CIMSG) *.el)
	ci -l $(CINAME) $(CIMSG) Makefile.nw INSTALL INSTALL.DOS README FAQ COPYRIGHT nwmake *.nw

source: FAQ
	for i in c shell lib xdoc icon awk tex; do (cd $$i; make CPIF=">" source); done
	sleep 1
	for i in c shell lib xdoc icon awk tex; do (cd $$i; make touch); done
touch:
	touch FAQ
	for i in c shell lib xdoc icon awk tex; do (cd $$i; make touch); done
boot:
	for i in c shell lib xdoc icon awk tex; do (cd $$i; make boot); done
clean:
	for i in c shell lib xdoc icon awk tex; do (cd $$i; make clean); done
	rm -f nwsrcfilter *~ */*~

clobber: clean
	for i in c shell lib xdoc icon awk tex; do (cd $$i; make clobber); done

Makefile: Makefile.nw
	chmod +w Makefile
	notangle -R'script' Makefile.nw | sh > Makefile
	chmod -w Makefile
