Eliminate more symbols multiply defined between libsupc++ and libc++.

The remaining multiple definitions were flushed out by attempting to
link libsupc++ and libc++ into the same executable with --whole-archive,
e.g.

clang++ -I../llvm/projects/libcxx/include -nodefaultlibs -Wl,--whole-archive lib/libc++.a /usr/lib/gcc/x86_64-linux-gnu/4.6/libsupc++.a -Wl,--no-whole-archive -lgcc -lgcc_s -lc -lpthread -lrt

(The same technique was used to flush out multiple definitions in
libstdc++.)

Differential Revision: http://llvm-reviews.chandlerc.com/D1824

llvm-svn: 192074
Cr-Mirrored-From: sso://chromium.googlesource.com/_direct/external/github.com/llvm/llvm-project
Cr-Mirrored-Commit: 926aa5f4f24a2e34dfe8dcbe3875550e6e87f70c
diff --git a/src/new.cpp b/src/new.cpp
index 961c020..f24014d 100644
--- a/src/new.cpp
+++ b/src/new.cpp
@@ -30,11 +30,13 @@
     #if defined(LIBCXXRT) || __has_include(<cxxabi.h>)
         #include <cxxabi.h>
     #endif  // __has_include(<cxxabi.h>)
-    #ifndef _LIBCPPABI_VERSION
+    #if !defined(_LIBCPPABI_VERSION) && !defined(__GLIBCXX__)
         static std::new_handler __new_handler;
     #endif  // _LIBCPPABI_VERSION
 #endif
 
+#ifndef __GLIBCXX__
+
 // Implement all new and delete operators as weak definitions
 // in this shared library, so that they can be overriden by programs
 // that define non-weak copies of the functions.
@@ -143,13 +145,19 @@
     ::operator delete[](ptr);
 }
 
+#endif // !__GLIBCXX__
+
 namespace std
 {
 
+#ifndef __GLIBCXX__
 const nothrow_t nothrow = {};
+#endif
 
 #ifndef _LIBCPPABI_VERSION
 
+#ifndef __GLIBCXX__
+
 new_handler
 set_new_handler(new_handler handler) _NOEXCEPT
 {
@@ -162,12 +170,16 @@
     return __sync_fetch_and_add(&__new_handler, (new_handler)0);
 }
 
+#endif // !__GLIBCXX__
+
 #ifndef LIBCXXRT
 
 bad_alloc::bad_alloc() _NOEXCEPT
 {
 }
 
+#ifndef __GLIBCXX__
+
 bad_alloc::~bad_alloc() _NOEXCEPT
 {
 }
@@ -178,6 +190,8 @@
     return "std::bad_alloc";
 }
 
+#endif // !__GLIBCXX__
+
 #endif //LIBCXXRT
 
 bad_array_new_length::bad_array_new_length() _NOEXCEPT