Problem compiling a vhdl file

I have ha.vhdl and ha_tb.vhdl files in one of my directory and I made a makefile in which the commands goes this way

ha: ha.vhdl ha_tb.vhdl ghdl -a $(GHDL_ARGS) $^ ghdl -e $(GHDL_ARGS) $@
clean: rm *.o *.cf

As I run ghdl -s command for ha.vhdl and ha_tb.vhdl it shows show no compilation errors.

After running the make command it goes in terminal this way:

/usr/bin/ld: cannot find -lz
collect2: error: ld returned 1 exit status
ghdl: compilation error

Can anyone please point out what am I missing ? Or someone say if there is any alternative? Thnx in advance !!!!

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