Compile and merge the latex cover letter, manuscript, and supporting info all at once

Makefile

ENGINE    = latexmk -pdf -silent -view=none
SOURCES   = cover_letter paper paper_supp
MERGEFILE = paper_wCoverLetterSupp_$(shell date "+%Y%m%d").pdf
TEMPS     = aux blg fdb_latexmk log out synctex.gz

MERGECMD=
ifneq ($(MERGEFILE),)
  MERGECMD=gs -dBATCH -dNOPAUSE -q -sDEVICE=pdfwrite -sOutputFile=$(MERGEFILE) $(SOURCES:=.pdf)
endif

all:
	$(ENGINE) $(SOURCES)
	$(MERGECMD)

force:
	@$(ENGINE) -gg $(SOURCES)
	$(MERGECMD)

count:
	@texcount -sub $(SOURCES:=.tex)

clean:
	@for a in $(TEMPS); do \
		rm -f $(SOURCES:=.$$a); \
	done