icu 63.1 build errors

[Ken Cunningham]

As we’re pondering the PR to update ICU to what amounts to a new ABI version, and as github is hosed tonight, I thought I would point people to freebsd’s attack on this issue when they braced ICU 61 and the failures they saw in doing so.

<https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=227042 <https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=227042>>

So far, each of their failures matches up exactly with the failures I have seen so far, and their fixes (for openttd and mapnik) worked verbatim to fix the same errors I saw.

So, to some extent, the road has been plowed for us…

ken


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