Recommit "Split exception.cpp and new.cpp implementation into different files for different runtimes."

This recommits r294707 with additional fixes. The main difference is
libc++ now correctly builds without any ABI library.

exception.cpp is a bloody mess. It's full of confusing #ifdef branches for
each different ABI library we support, and it's getting unmaintainable.

This patch breaks down exception.cpp into multiple different header files,
roughly one per implementation. Additionally it moves the definitions of
exceptions in new.cpp into the correct implementation header.

This patch also removes an unmaintained libc++abi configuration.
This configuration may still be used by Apple internally but there
are no other possible users. If it turns out that Apple still uses
this configuration internally I will re-add it in a later commit.
See http://llvm.org/PR31904.

llvm-svn: 294730

1 files changed, 6 insertions, 0 deletions

diff --git a/libcxx/include/exception b/libcxx/include/exception
index 98e1f37f919..db11c36d806 100644
--- a/libcxx/include/exception
+++ b/libcxx/include/exception
@@ -82,6 +82,10 @@ template <class E> void rethrow_if_nested(const E& e);
 #include <cstdlib>
 #include <type_traits>
 
+#if defined(_LIBCPP_ABI_MICROSOFT)
+#include <vcruntime_exception.h>
+#endif
+
 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
 #pragma GCC system_header
 #endif
@@ -89,6 +93,7 @@ template <class E> void rethrow_if_nested(const E& e);
 namespace std  // purposefully not using versioning namespace
 {
 
+#if !defined(_LIBCPP_ABI_MICROSOFT)
 class _LIBCPP_EXCEPTION_ABI exception
 {
 public:
@@ -105,6 +110,7 @@ public:
     virtual ~bad_exception() _NOEXCEPT;
     virtual const char* what() const _NOEXCEPT;
 };
+#endif // !_LIBCPP_ABI_MICROSOFT
 
 typedef void (*unexpected_handler)();
 _LIBCPP_FUNC_VIS unexpected_handler set_unexpected(unexpected_handler) _NOEXCEPT;