libstdc++: use extern "C++" in all our C++ system headers.
This is needed to build an independent toolchain with g++ that doesn't think
that all these headers are in C.
Change-Id: Ie9a8ccfcab7780d6a4e5722777d61c2b1b312001
diff --git a/libstdc++/include/csetjmp b/libstdc++/include/csetjmp
index a68d127..ba82144 100644
--- a/libstdc++/include/csetjmp
+++ b/libstdc++/include/csetjmp
@@ -36,6 +36,8 @@
#include <setjmp.h>
+extern "C++" {
+
#ifndef setjmp
#define setjmp(env) setjmp (env)
#endif
@@ -46,4 +48,6 @@
using ::longjmp;
} // namespace std
+} // extern C++
+
#endif // BIONIC_LIBSTDCPP_INCLUDE_CSETJMP__