<rdar://problem/8279559> [libstdcxx] use new linker options to make symbols non-weak

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@113616 91177308-0d34-0410-b5e6-96231b3b80d8

src/typeinfo.cpp

@@ -7,6 +7,7 @@
 //
 //===----------------------------------------------------------------------===//
 #include <stdlib.h>
+#include <cxxabi.h>
 
 #include "typeinfo"
 
@@ -37,3 +38,11 @@ std::bad_typeid::what() const throw()
 {
   return "std::bad_typeid";
 }
+
+#if __APPLE__
+  // On Darwin, the cxa_bad_* functions cannot be in the lower level library
+  // because bad_cast and bad_typeid are defined in his higher level library
+  void __cxxabiv1::__cxa_bad_typeid() { throw std::bad_typeid(); }
+  void __cxxabiv1::__cxa_bad_cast() { throw std::bad_cast(); }
+#endif
+