# Syntax
# <target>: <dependencies>
# 	  <command>
#	  ...

# variables 
LATEX = pdflatex
BIB = bibtex 

all: linux-24.pdf

# creating a pdf outof tex and bib file
# % = filename without ending
# $* = filename corresponding to %
%.pdf: %.tex %.bib
	$(LATEX) $*
	$(BIB) $*
	$(LATEX) $*

# check if "undefined references" in Log-File 
# using shell commands
	if grep -q "undefined references" $*.log; then \
		$(LATEX) $*; \
	fi

# remove all created files
clean:
	rm -f *.pdf *.aux *.log *.bbl *.blg *.fdb_latexmk *.fls *.synctex.gz