Move _LIBCPP_ENABLE_CXX17_REMOVED_UNEXPECTED_FUNCTIONS macro to build system
_LIBCPP_ENABLE_CXX17_REMOVED_UNEXPECTED_FUNCTIONS is currently used to
bring back std::unexpected, which is removed in C++17, but still needed
for libc++abi for backward compatibility.
This macro used to define in cxa_exception.cpp only, but actually
needed for all sources that touches exceptions.
So, a build-system-level macro is better fit to define this macro.
https://reviews.llvm.org/D46056
Patch from Taiju Tsuiku <tzik@chromium.org>!
git-svn-id: https://llvm.org/svn/llvm-project/libcxxabi/trunk@331150 91177308-0d34-0410-b5e6-96231b3b80d8
3 files changed
