PERL_VERSION:=5.28.0 PERL_EXPLODE:=$(subst ., ,$(PERL_VERSION)) PERL_MAJOR:=$(word 1,$(PERL_EXPLODE))PERL_MINOR:=$(word 2,$(PERL_EXPLODE))PERL_REL:=$(word 3,$(PERL_EXPLODE)) PERL_VERSION3:=$(PERL_VERSION)PERL_VERSION2:=$(PERL_MAJOR).$(PERL_MINOR)