Build for Linux ARM64

[lfoppiano]

Follow up from here: kermitt2/grobid#1230 (comment)

[AaronNGray]

Yes, likewise, it's not top priority for me right now as I am working on the sister project to the search engine crawler at the moment. But hopefully I will get time before you will. I have programmed in C++ since the early days so it should be easy enough to get to the bottom of.

[AaronNGray]

Okay the status on this issue is someone called Aazhar who is no longer on GitHub added ICU support ab083a6. So this is an unknown and ICU support has just been added without leaving a trace as to what version of ICU it is or were it came from.

I need to look into latest ICU. As AFAICT ARM64/Ubuntu uses 32 bit wchar_t's not 16 bit wchar_t's, which are not supported in icu/common/local/unistr.h.

I need to do a test to verify this.

https://github.com/unicode-org/icu/blob/main/icu4c/source/common/unicode/unistr.h#L3152

[lfoppiano]

I'd assume from here it's version 62, but is not clear.

[AaronNGray]

Thanks, the source said a really really old version, so was not sure. Sorry I should have read that.