sub MY::postamble {
'
$(MYEXTLIB): mylib/Makefile
        cd mylib && $(MAKE) $(PASSTHRU)
';
}

##</code><code>##

sub MY::postamble {
<<'EXA';
mylib/Makefile: mylib/Makefile.PL
	echo "ZZZZZZZZ"
	cd mylib && perl Makefile.PL

$(MYEXTLIB): mylib/Makefile
	echo "XXXXXXXXXXXXX pass is '$(PASSTHRU)' for GNU make, this tells me the target to pass thru '$(MAKECMDGOALS)'"
	cd mylib && $(MAKE) $(PASSTHRU)
EXA