Yuta Saito f3f13a2637 [wasm] Enable --gc-sections for WebAssembly by default ...

This change enables the `--gc-sections` linker flag for WebAssembly
targets by default. This flag has been disabled because it did not
respect `llvm.used` and it caused stripping `swift5` metadata sections
even though they were used through encapsulation symbols (a.k.a `__start`/`__stop`).

The issue has been fixed in the LLVM side (ba3c1f9ce3)
by adding new segment flags to the WebAssembly object file format.

2024-02-21 02:13:01 +00:00

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