zapster added a comment.
Thanks for your comment. I replied inline.
================
Comment at: llvm/lib/LTO/LTOBackend.cpp:335
+ .Case("bitcode", EmbedBitcodeKind::Embed_Bitcode)
+ .Case("marker", EmbedBitcodeKind::Embed_Marker)
+ .Default(~0U);
----------------
tejohnson wrote:
> Does this value make any sense since CmdArgs is always empty below?
You are right. Currently, this option value is not utterly useful, but I kept
it for compatibility with clangs `-fembed-bitcode`. It seems the marker section
is needed (even if empty), otherwise certain tools will complain (notably the
MacOS linker). Ideally, we would have something sensible to write into the
section but I am not sure about reasonable values. I was not able to find any
information about consumers of these commands. Pointers in that regard would be
highly appreciated.
Anyhow, I lean toward keeping the options for compatibility with clang and for
making it simple to properly implement the `marker` case. That said, I am
perfectly fine with removing the option. In that case, I guess I should get rid
of `EmbedBitcodeKind` altogether and always insert the bitcode and the marker,
right?
On the other hand, we should maybe just consolidate the option (parsing) with
the clang option. Some thoughts about that in my inline comment above.
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D68213/new/
https://reviews.llvm.org/D68213
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