build script - update argument handling

[shawnlaffan]

Parts of the system assume the dllsuffix is one or two underscores when it is not passed. This can lead to issues when reusing build artefacts as the extraction code assumes the underscores if no suffix is passed (e.g. #36).

Some means to differentiate not passed from passed would be handy as I have not found a good way yet. Alternately a getopts approach could be tried.
https://www.baeldung.com/linux/bash-parse-command-line-arguments

[shawnlaffan]

Alternately the script could default to the underscores if the second arg is blank or null. If the user wants no dllsuffix then they can pass "none". That would be simpler to implement.

e.g. these will default to __ on 64 bit systems:

./build.sh 5034
./build.sh 5034 ""

This will set dllsuffix to "":

./build.sh 5034 none

[genio]

Let me just put this out there... do we need to worry about 32-bit any longer?

[shawnlaffan]

I think not but maybe there are still some uses out there. Certainly there is no reason 32 bit should hold up a release of 64 bit.

[shawnlaffan]

PR merged, closing issue.

The 32 bit question should probably be raised on the perl-dist-strawberry issue tracker?