operator new[] and delete[] are separately
overloadable. Used in gc_cpp.h.
+GC_NO_INLINE_STD_NEW Tested by gc_cpp.cc and gc_cpp.h. MS Windows only.
+ Define the system-wide new and delete operators in gccpp.dll
+ instead of providing an inline version of the operators.
+
_DLL Tested by gc_config_macros.h. Defined by Visual C++ if runtime
dynamic libraries are in use. Used (only if none of GC_DLL,
GC_NOT_DLL, __GNUC__ are defined) to test whether