Ok, from the CLI the new macro stack expansion now works just fine and
as expected:

| openpkg rpm --define "foo foo" --define "foo bar" --define "foo quux" --eval '%{@foo:,}'
| foo,bar,quux

But from a .spec file the first value is now missing:

| [...]
| BuildPreReq:  foo
| BuildPreReq:  OpenPKG, openpkg >= 20050726
| BuildPreReq:  binutils
| BuildPreReq:  make
| PreReq:       OpenPKG, openpkg >= 20050726
|
| %{lua: io.stdout:write(rpm.expand("%{@buildprereq:, }") .. "\n") }
| [...]

The output is:

| $ /openpkg/bin/openpkg rpm -bb *spec
| OpenPKG, openpkg >= 20050726, binutils, make

Notice that "foo" is missing.

So, there remains at least one subtle bug related to the first macro
value (at the bottom of the stack). Previously for the CLI scenario this
value was output twice, now the CLI scenario is correct, but in .spec
file parsing the first value now is missing.

So, although all other issues are now gone, we still have this
small little bug...

                                       Ralf S. Engelschall
                                       rse@engelschall.com
                                       www.engelschall.com