clang-cl: Map /EHs- to -fno-exceptions
This isn't 100% compatible with MSVC, but it's close enough. MSVC's /EH
flag doesn't really control exceptions so much as how to clean up after
an exception is thrown. The upshot is that cl.exe /EHs- will compile
try, throw, and catch statements with a warning, but clang-cl will
reject such constructs with a hard error. We can't compile such EH
constructs anyway, but this may matter to consumers of the AST.
Reviewers: hans
Differential Revision: http://reviews.llvm.org/D4317
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@211909
91177308-0d34-0410-b5e6-
96231b3b80d8