I've noticed that it is not possible to explicitly call targets ending with slash on make invocation, please see the following example (and inline comments):
$ cat makefile_with_slash
foo/:
echo $@
$ make -f makefile_with_slash
echo foo # please not that slash is stripped!
foo
$ make -f makefile_with_slash foo # this one works but there is no "foo" target!
echo foo
foo
$ make -f makefile_with_slash foo/
make: *** No rule to make target `foo/'. Stop.
$ cat makefile_wo_slash
foo:
echo $@
$ make -f makefile_wo_slash
echo foo
foo
$ make -f makefile_wo_slash foo
echo foo
foo
$ make -f makefile_wo_slash foo/
make: *** No rule to make target `foo/'. Stop.
$ make --version
GNU Make 3.81
Copyright (C) 2006 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.
There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A
PARTICULAR PURPOSE.
This program built for x86_64-redhat-linux-gnu