Add a stub C++ standard library.

This is necessary to build libunwind.

software/common.mak

@@ -42,7 +42,7 @@ endif
 INCLUDES = -I$(MSCDIR)/software/include/base -I$(MSCDIR)/software/include -I$(MSCDIR)/common
 COMMONFLAGS = -Os $(CPUFLAGS) -Wall -fno-builtin -nostdinc -DMSC_GIT_ID=$(MSC_GIT_ID) $(INCLUDES)
 CFLAGS = $(COMMONFLAGS) -fexceptions -Wstrict-prototypes -Wold-style-definition -Wmissing-prototypes
-CXXFLAGS = $(COMMONFLAGS) -fexceptions -fno-rtti -ffreestanding
+CXXFLAGS = $(COMMONFLAGS) -std=c++11 -I$(MSCDIR)/software/include/basec++ -fexceptions -fno-rtti -ffreestanding
 LDFLAGS = -nostdlib -nodefaultlibs -L$(MSCDIR)/software/include
 
 # compile and generate dependencies, based on

software/include/basec++/algorithm

@@ -0,0 +1,4 @@
+#ifndef __CXX_ALGORITHM
+#define __CXX_ALGORITHM
+
+#endif /* __CXX_ALGORITHM */

software/include/basec++/cstddef

@@ -0,0 +1,11 @@
+#ifndef __CXX_CSTDDEF
+#define __CXX_CSTDDEF
+
+#include <stddef.h>
+
+namespace std {
+  using ::size_t;
+  using ::ptrdiff_t;
+}
+
+#endif /* __CXX_CSTDDEF */

software/include/basec++/cstdlib

@@ -0,0 +1,6 @@
+#ifndef __CXX_CSTDLIB
+#define __CXX_CSTDLIB
+
+#include <stdlib.h>
+
+#endif /* __CXX_CSTDLIB */

software/include/basec++/memory

@@ -0,0 +1,4 @@
+#ifndef __CXX_MEMORY
+#define __CXX_MEMORY
+
+#endif /* __CXX_MEMORY */

software/include/basec++/new

@@ -0,0 +1,9 @@
+#ifndef __CXX_NEW
+#define __CXX_NEW
+
+#include <cstddef>
+
+inline void* operator new (std::size_t size, void* ptr) noexcept
+  { return ptr; }
+
+#endif /* __CXX_NEW */

software/include/basec++/tuple

@@ -0,0 +1,4 @@
+#ifndef __CXX_TUPLE
+#define __CXX_TUPLE
+
+#endif /* __CXX_TUPLE */

software/include/basec++/vector

@@ -0,0 +1,4 @@
+#ifndef __CXX_VECTOR
+#define __CXX_VECTOR
+
+#endif /* __CXX_VECTOR */