[libcxxabi] r324542 - Fix compilation in C++17 mode.

[Richard Smith via cfe-commits]

Author: rsmith
Date: Wed Feb  7 15:23:23 2018
New Revision: 324542

URL: http://llvm.org/viewvc/llvm-project?rev=324542&view=rev
Log:
Fix compilation in C++17 mode.

C++17 removes `std::unexpected_handler`, but libc++abi needs it to define
`__cxa_exception`. When building against libc++, this is easily rectified by
telling libc++ we're building the library. We already do this in the other
places where we need these symbols.

Differential Revision: https://reviews.llvm.org/D42987

Modified:
    libcxxabi/trunk/src/cxa_exception.cpp

Modified: libcxxabi/trunk/src/cxa_exception.cpp
URL: http://llvm.org/viewvc/llvm-project/libcxxabi/trunk/src/cxa_exception.cpp?rev=324542&r1=324541&r2=324542&view=diff
==============================================================================
--- libcxxabi/trunk/src/cxa_exception.cpp (original)
+++ libcxxabi/trunk/src/cxa_exception.cpp Wed Feb  7 15:23:23 2018
@@ -11,6 +11,8 @@
 //  
 //===----------------------------------------------------------------------===//
 
+#define _LIBCPP_ENABLE_CXX17_REMOVED_UNEXPECTED_FUNCTIONS
+
 #include "cxxabi.h"
 
 #include <exception>        // for std::terminate