Add support for C++ static constructors (at least to a few platforms)

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@4438 42af7a65-404d-4744-a932-0658087f49c3

libxx/Makefile

@@ -39,8 +39,8 @@ ASRCS		=
 AOBJS		= $(ASRCS:.S=$(OBJEXT))
 CSRCS		= 
 COBJS		= $(CSRCS:.c=$(OBJEXT))
-CXXSRCS		= libxx_new.cxx libxx_newa.cxx libxx_delete.cxx \
-		  libxx_deletea.cxx libxx_cxapurevirtual.cxx
+CXXSRCS		= libxx_cxapurevirtual.cxx libxx_delete.cxx libxx_deletea.cxx \
+			  libxx_eabi_atexit.cxx libxx_new.cxx libxx_newa.cxx 
 CXXOBJS		= $(CXXSRCS:.cxx=$(OBJEXT))
 
 SRCS		= $(ASRCS) $(CSRCS) $(CXXSRCS)

libxx/libxx_eabi_atexit.cxx

@@ -0,0 +1,83 @@
+//***************************************************************************
+// libxx/libxx_eabi_atexit.cxx
+//
+//   Copyright (C) 2012 Gregory Nutt. All rights reserved.
+//   Author: Gregory Nutt <gnutt@nuttx.org>
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+//
+// 1. Redistributions of source code must retain the above copyright
+//    notice, this list of conditions and the following disclaimer.
+// 2. Redistributions in binary form must reproduce the above copyright
+//    notice, this list of conditions and the following disclaimer in
+//    the documentation and/or other materials provided with the
+//    distribution.
+// 3. Neither the name NuttX nor the names of its contributors may be
+//    used to endorse or promote products derived from this software
+//    without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+// COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+// OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+// AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+// ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+// POSSIBILITY OF SUCH DAMAGE.
+//
+//***************************************************************************
+
+//***************************************************************************
+// Included Files
+//***************************************************************************
+
+#include <nuttx/config.h>
+#include <cstdlib>
+
+//***************************************************************************
+// Definitions
+//***************************************************************************
+
+//***************************************************************************
+// Private Data
+//***************************************************************************
+
+extern "C"
+{
+  //*************************************************************************
+  // Public Data
+  //*************************************************************************
+
+  void *__dso_handle = NULL;
+
+  //*************************************************************************
+  // Public Functions
+  //*************************************************************************
+
+  //*************************************************************************
+  // Name: __aeabi_atexit
+  //
+  // Description:
+  //   Registers static object destructors.  Normally atexit(f) should call
+  //   __aeabi_atexit (NULL, f, NULL).  But in the usage model here, static
+  //   constructors are initialized at power up and are never destroyed
+  //   because they have global scope and must persist for as long as the
+  //   embedded device is powered on.
+  //
+  // Reference:
+  //   http://infocenter.arm.com/help/topic/com.arm.doc.ihi0041c/IHI0041C_cppabi.pdf
+  //
+  //*************************************************************************
+
+  int __aeabi_atexit(void* object, void (*destroyer)(void*), void *dso_handle)
+    {
+      //return __cxa_atexit(destroyer, object, dso_handle); // 0 ? OK; non-0 ? failed }
+      return 0;
+    }
+}