[PATCH] D27387: [libc++] Add a key function for bad_function_call

[Shoaib Meenai via Phabricator via cfe-commits]

smeenai added a comment.

In https://reviews.llvm.org/D27387#711866, @EricWF wrote:

> This LGTM, but I have a question: Should we add these dylib definitions right away so that it's easier to adopt the ABI change in future? This will allow legacy dylibs to support this ABI change in future. If you agree we can make that change as a follow up commit.


As in, leave the header as-is, but make the definitions in `functional.cpp` unconditional? I'm fine with that.


https://reviews.llvm.org/D27387