update wasi-libc and Makefile to fix <fstream>

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 #373 Signed-off-by: Joel Dice <[email protected]>
WebAssembly · Jan 11, 2024 · 964191c · 964191c
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commit 964191c
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diff --git a/Makefile b/Makefile
@@ -182,7 +182,7 @@ LIBCXX_CMAKE_FLAGS = \
     -DLIBCXX_ENABLE_SHARED:BOOL=$(2) \
     -DLIBCXX_ENABLE_EXPERIMENTAL_LIBRARY:BOOL=OFF \
     -DLIBCXX_ENABLE_EXCEPTIONS:BOOL=OFF \
-    -DLIBCXX_ENABLE_FILESYSTEM:BOOL=OFF \
+    -DLIBCXX_ENABLE_FILESYSTEM:BOOL=ON \
     -DLIBCXX_ENABLE_ABI_LINKER_SCRIPT:BOOL=OFF \
     -DLIBCXX_CXX_ABI=libcxxabi \
     -DLIBCXX_CXX_ABI_INCLUDE_PATHS=$(LLVM_PROJ_DIR)/libcxxabi/include \

diff --git a/src/wasi-libc b/src/wasi-libc