Patch by Andrew C. Morrow: Conditionally include cxxabi.h in new.cpp and typeinfo.cpp. Both new.cpp and typeinfo.cpp have code that is conditionally compiled

based on the LIBCXXRT and _LIBCPPABI_VERSION defines, but those files
do not currently include <cxxabi.h> in the non __APPLE__ case. The
attached patch updates those files so that for non __APPLE__ builds
<cxxabi.h> is included if available or if LIBCXXRT is set. I'm
modeling this on the recent updates to exception.cpp.

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@160790 91177308-0d34-0410-b5e6-96231b3b80d8

src/new.cpp

@@ -11,6 +11,10 @@
 
 #include "new"
 
+#ifndef __has_include
+#define __has_include(inc) 0
+#endif
+
 #if __APPLE__
     #include <cxxabi.h>
 
@@ -21,7 +25,12 @@
         #define __new_handler __cxxabiapple::__cxa_new_handler
     #endif
 #else  // __APPLE__
-    static std::new_handler __new_handler;
+    #if defined(LIBCXXRT) || __has_include(<cxxabi.h>)
+        #include <cxxabi.h>
+    #endif  // __has_include(<cxxabi.h>)
+    #ifndef _LIBCPPABI_VERSION
+        static std::new_handler __new_handler;
+    #endif  // _LIBCPPABI_VERSION
 #endif
 
 // Implement all new and delete operators as weak definitions

src/typeinfo.cpp

@@ -7,8 +7,15 @@
 //
 //===----------------------------------------------------------------------===//
 #include <stdlib.h>
+
+#ifndef __has_include
+#define __has_include(inc) 0
+#endif
+
 #if __APPLE__
 #include <cxxabi.h>
+#elif defined(LIBCXXRT) || __has_include(<cxxabi.h>)
+#include <cxxabi.h>
 #endif
 
 #include "typeinfo"