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+### latex.makefile
+
+# Targets:
+#    default : compiles the document to a PDF file using the defined
+#              latex generating engine. (pdflatex, xelatex, etc)
+#    display : displays the compiled document in a common PDF viewer.
+#              (currently linux = evince, OSX = open)
+#    clean   : removes the build/ directory holding temporary files
+
+
+PROJECT = pa2cal 
+
+default: build/$(PROJECT).pdf
+
+display: default
+	(${PDFVIEWER} build/$(PROJECT).pdf &)
+
+
+### Compilation Flags
+PDFLATEX_FLAGS  = -halt-on-error -output-directory build/
+
+TEXINPUTS = .:build/
+TEXMFOUTPUT = build/
+
+
+### File Types (for dependancies
+TEX_FILES = $(shell find . -name '*.tex' -or -name '*.sty' -or -name '*.cls')
+BIB_FILES = $(shell find . -name '*.bib')
+BST_FILES = $(shell find . -name '*.bst')
+IMG_FILES = $(shell find . -path '*.jpg' -or -path '*.png' -or \( \! -path './build/*.pdf' -path '*.pdf' \) )
+
+
+### Standard PDF Viewers
+# Defines a set of standard PDF viewer tools to use when displaying the result
+# with the display target. Currently chosen are defaults which should work on
+# most linux systems with GNOME installed and on all OSX systems.
+
+UNAME := $(shell uname)
+
+ifeq ($(UNAME), Linux)
+PDFVIEWER = evince
+endif
+
+ifeq ($(UNAME), Darwin)
+PDFVIEWER = open
+endif
+
+
+### Clean
+# This target cleans the temporary files generated by the tex programs in
+# use. All temporary files generated by this makefile will be placed in build/
+# so cleanup is easy.
+
+clean::
+	rm -rf build/
+
+### Core Latex Generation
+# Performs the typical build process for latex generations so that all
+# references are resolved correctly. If adding components to this run-time
+# always take caution and implement the worst case set of commands.
+# Example: latex, bibtex, latex, latex
+#
+# Note the use of order-only prerequisites (prerequisites following the |).
+# Order-only prerequisites do not effect the target -- if the order-only
+# prerequisite has changed and none of the normal prerequisites have changed
+# then this target IS NOT run.
+#
+# In order to function for projects which use a subset of the provided features
+# it is important to verify that optional dependancies exist before calling a
+# target; for instance, see how bibliography files (.bbl) are handled as a
+# dependency.
+
+build/:
+	mkdir -p build/
+
+build/$(PROJECT).aux: $(TEX_FILES) $(IMG_FILES) | build/
+	pdflatex $(PDFLATEX_FLAGS) $(PROJECT)
+
+build/$(PROJECT).bbl: $(BIB_FILES) | build/$(PROJECT).aux
+	bibtex build/$(PROJECT)
+	pdflatex $(PDFLATEX_FLAGS) $(PROJECT)
+	
+build/$(PROJECT).pdf: build/$(PROJECT).aux $(if $(BIB_FILES), build/$(PROJECT).bbl)
+	pdflatex $(PDFLATEX_FLAGS) $(PROJECT)