Hi Oliver,
Thanks a lot for using pialign!
This probably has to do with the version of the C++ compiler included
with Arch linux.
I can't test this myself because I don't have an Arch machine on hand,
but I've updated github with two fixes that should resolve the errors
your seeing.
https://github.com/neubig/pialign
Could you pull the latest version from github and see if it works this time?
Graham
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