SAGE_LISTING_SRCS = $(wildcard sage_listings/*.listing)
SAGE_LISTING_DSTS = $(patsubst %.listing,%.py,$(SAGE_LISTING_SRCS))
+INDICES = $(PN)
+
# Use kpsewhich (from the kpathsea suite) to find the absolute paths
# of the bibtex/mjotex files listed in in $(BIBS)/$(MJOTEX). The SRCS
# variable should contain all (Bib)TeX source files for the document.
MJOTEXPATHS = $(shell kpsewhich $(MJOTEX))
SRCS += $(MJOTEXPATHS)
endif
+ifdef SAGE_LISTING_DSTS
+SRCS += $(SAGE_LISTING_DSTS)
+endif
+ifdef INDICES
+INDEX_SRCS = $(addsuffix .idx,$(INDICES))
+INDEX_DSTS = $(addsuffix .ind,$(INDICES))
+SRCS += $(INDEX_DSTS)
+endif
# The first target is the default, so put the PDF document first.
#
$(LATEX) $(PN).tex
+ifdef INDICES
+# We need to be able to build the index source files without involving
+# the main $(PN).pdf rule, in order to avoid a chicken-and-egg problem.
+# This is similar to the $(PN).aux rule above, except that an index is
+# optional and there might be more than one of them.
+$(INDEX_SRCS): $(PN).tex
+ $(LATEX) $(PN).tex
+endif
+
+ifdef INDICES
+# Create real indices from source files by running "makeindex" on them.
+%.ind: %.idx
+ makeindex $<
+endif
+
# The pipe below indicates an "order-only dependency" on the aux file.
# Without it, every compilation of $(PN).tex would produce a new
# $(PN).aux, and thus $(PN).bbl would be rebuilt. This in turn causes