commit e67ccef1cac66e8bfbf9564e5cbd7cdb838a8920
author Saleem Abdulrasool <compnerd@compnerd.org> Wed Nov 06 10:51:42 2019 -0800
committer Copybara-Service <copybara-worker@google.com> Fri Aug 28 11:14:34 2020 -0700
tree 09f6dc75b86b73abd3129167e7bb9bca6cfc7563
parent 709cdd0c24890bf6788a444d0f4884c80de2eb53

unwind: disable RTTI during the build of libunwind

Disable the type information emission for libunwind.  libunwind does not
use `dynamic_cast`.  This results in a smaller binary, and more
importantly, avoids the dependency on libc++abi.  This ensures that we
have complete symbol resolution of symbols on ELF targets without
linking to the C++ runtime support library.  This change avoids the
emission of a reference to `__si_class_type_info`.

GitOrigin-RevId: cbc872a63f81ad9482bb288165af63d7444fa3ed