llvm dev - Jun 2020 - RFC: Adding support for the z/OS platform to LLVM and clang

Hello.
> 2) Add patches to Clang to allow EBCDIC and ASCII (ISO-8859-1) encoded
input source files. This would be done at the file open time to allow the
rest of Clang to operate as if the source was UTF-8 and so require no
changes downstream. Feedback on this plan is welcome from the Clang
community.

Would it be correct to assume that this EBCDIC -> UTF-8 mapping would be as
prescribed by
UTF-EBCDIC / IBM CDRA, notably for the control characters that do not map
exactly?
Notably, if the execution encoding is EBCDIC, is '0x06' equivalent to
'0086', etc?

The question "Is Unicode sufficient to represent all characters present in
the input source without using the Private Use Area?" is one that
is relevant to both Clang and the C/C++ standard. ( I do hope that it is
the case!)

Thanks,

Corentin
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