a9ee8e4a45
This patch adds a wrapper class called EncodingConverter for ConverterEBCDIC. This class is then extended to support the ICU library or iconv library. The ICU library currently takes priority over the iconv library. Relevant RFCs: https://discourse.llvm.org/t/rfc-adding-a-charset-converter-to-the-llvm-support-library/69795 https://discourse.llvm.org/t/rfc-enabling-fexec-charset-support-to-llvm-and-clang-reposting/71512 Stacked PR to enable fexec-charset that depends on this: https://github.com/llvm/llvm-project/pull/138895 See old PR for review and commit history: https://github.com/llvm/llvm-project/pull/74516
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