[PATCH] D147190: [lld][WebAssembly] Process stub libraries before and after LTO

[Sam Clegg via Phabricator via llvm-commits]

sbc100 added a comment.

In D147190#4234179 <https://reviews.llvm.org/D147190#4234179>, @dschuff wrote:

> Do we really need to support stub libcalls (i.e. the kind that can be generated at codegen time)? These should just be compiler-rt and maybe a few core libc functions, right? Do we expect those to be implemented in JS and/or the environment?

Yes, we have use cases in emscripten where symbols that are created during LTO depend on other native symbols.   The one I can remember was emscripten exception handling I believe.   The compiler creates references to JS-defined functions at LTO time, which in tern require certain native exports (__cxa_is_pointer_type I believe).


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https://reviews.llvm.org/D147190