use latexmk instead of plain make for build

Makefile

@@ -1,25 +1,14 @@
 NAME=thesis
 ABSTRACT=abstract
-REFS=refs.bib
-
-TEX=pdflatex #possibly switch to lualatex/xelatex
-BIB=bibtex #possibly switch to biber (remove backend=bibtex from biblatex opts)
-
-RMF=rm -f
+LATEXMKOPTS=#-pdf #enable for forcing pdflatex
+LATEXMK=latexmk $(LATEXMKOPTS)
 
 PDFS=$(NAME).pdf $(ABSTRACT)-en.pdf $(ABSTRACT)-cz.pdf
 
-all: $(PDFS)
-
-$(NAME).pdf: $(wildcard *.tex) $(REFS) $(NAME).xmpdata
-	$(TEX) $(NAME)
-	$(BIB) $(NAME)
-	$(TEX) $(NAME)
-	$(TEX) $(NAME)
-
-$(ABSTRACT)-%.pdf: $(ABSTRACT)-%.tex $(ABSTRACT)-%.xmpdata metadata.tex
-	$(TEX) $<
+all:
+	$(LATEXMK) $(NAME)
+	$(LATEXMK) $(ABSTRACT)-cz
+	$(LATEXMK) $(ABSTRACT)-en
 
 clean:
-	$(RMF) *.log *.dvi *.aux *.toc *.lof *.lot *.out *.bbl *.blg *.xmpi
-	$(RMF) $(PDFS)
+	$(LATEXMK) -C