update wasi-libc and Makefile to fix <fstream>
#375
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As of LLVM 17, which includes https://reviews.llvm.org/D152168, libcxx has combined the old `_LIBCPP_HAS_NO_FILESYSTEM_LIBRARY` and `_LIBCPP_HAS_NO_FSTREAM` preprocessor symbols into a single `_LIBCPP_HAS_NO_FILESYSTEM` symbol, which means there's no longer any way to enable `<fstream>` without enabling `<filesystem>`. The solution is to set `-DLIBCXX_ENABLE_FILESYSTEM:BOOL=ON` and update `wasi-libc`, which includes stubs for the functions required by libcxx's `<filesystem>` implementation. Fixes WebAssembly#373 Signed-off-by: Joel Dice <joel.dice@fermyon.com>
abrown
approved these changes
Jan 12, 2024
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As of LLVM 17, which includes https://reviews.llvm.org/D152168, libcxx has combined the old
_LIBCPP_HAS_NO_FILESYSTEM_LIBRARYand_LIBCPP_HAS_NO_FSTREAMpreprocessor symbols into a single_LIBCPP_HAS_NO_FILESYSTEMsymbol, which means there's no longer any way to enable<fstream>without enabling<filesystem>.The solution is to set
-DLIBCXX_ENABLE_FILESYSTEM:BOOL=ONand updatewasi-libc, which includes stubs for the functions required by libcxx's<filesystem>implementation.Fixes #373