Sam Clegg 4230fa9390 [libcxxabi] Prevent cmake from removing our explicit system C++ include paths
We build with `-nostdinc++` and add our own header path via
`LIBCXXABI_LIBCXX_INCLUDES`.  However cmake tried to be clever and if
`LIBCXXABI_LIBCXX_INCLUDES` happens to match the compilers system path
it will remove the `-I` flag meaning we can't access any C++ headers.

Ideally cmake would be able see that we are using `-nostdinc++` and
disable this behaviour.

Differential Revision: https://reviews.llvm.org/D69973
2019-11-12 10:08:40 -08:00
..
2019-10-24 13:25:15 -07:00