[PATCH] D97736: [Driver] Add a experimental option to link to LLVM libc.

[Siva Chandra via Phabricator via cfe-commits]

sivachandra added a comment.

In D97736#2605535 <https://reviews.llvm.org/D97736#2605535>, @phosek wrote:

> Have you considered using an input linker script? We could generate `libc.so` that could look something like:
>
>   INPUT(libllvmlibc.a /lib/libc.so)
>
> We would need to pass `--sysroot` to the linker for this to work. The driver could remain completely agnostic of whether you're using LLVM libc or not.

Yes, that was also considered. Those downstream users who have the flexibility to do it that way should be able to do it that way. However, not all downstream users or normal clang users will have that liberty [1]. Another point to note is that we will have to do this with all libc components like `libc.so`, `libm.so` etc.

[1] I think all of this can be done. For example, we can set all this up when building a distribution. However, I am not sure this is worth it when we know this is a transient phase. Soon, when LLVM libc is complete enough, a more appropriate option would be the one which allows choosing a libc as Eric pointed out.


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https://reviews.llvm.org/D97736