uClibc++ compiles... but it is a long way from linking

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5293 42af7a65-404d-4744-a932-0658087f49c3

libxx/Kconfig

@@ -10,6 +10,10 @@ config HAVE_CXX
 		Toolchain supports C++ and CXX, CXXFLAGS, and COMPILEXX have been 
 		defined in the configurations Make.defs file.
 
+if HAVE_CXX
+
+comment "Basic CXX Support"
+
 config HAVE_CXXINITIALIZE
 	bool "Have C++ initialization"
 	default n
@@ -25,3 +29,26 @@ config CXX_NEWLONG
 		size_t may be type long or type int.  This matters for some
 		C++ library routines because the NuttX size_t might not have
 		the same underlying type as your toolchain's size_t.
+
+comment "uClibc++ Standard C++ Library"
+
+config UCLIBCXX
+	bool "Build uClibc++ (must be installed)"
+	default n
+	---help---
+		If you have installed uClibc++ into the NuttX source try, then it can
+		be built by selecting this option.  See misc/uClibc++/README.txt for
+		information on installing uClibc++.
+
+if UCLIBCXX
+
+config UCLIBCXX_EXCEPTION
+	bool "Enable Exception Suppport"
+	default y
+
+config UCLIBCXX_IOSTREAM_BUFSIZE
+	int "IO Stream Buffer Size"
+	default 32
+
+endif
+endif

libxx/Makefile

@@ -49,12 +49,19 @@ CXXSRCS += libxx_newa.cxx
 DEPPATH = --dep-path .
 VPATH = .
 
-# Include the uClibc++ Make.defs file (if it is present).  If is present,
+# Include the uClibc++ Make.defs file if selected.  If it is included,
 # the uClibc++/Make.defs file will add its files to the source file list,
 # add its DEPPATH info, and will add the appropriate paths to the VPATH
 # variable
+#
+# Note that an error will occur if you select CONFIG_LIBXX_UCLIBCXX
+# without installing the uClibc++ package.  This is intentional to let
+# you know about the configuration problem.  Refer to misc/uClibc++/README.txt
+# for more information
 
--include uClibc++/Make.defs
+ifeq ($(CONFIG_UCLIBCXX),y)
+include uClibc++/Make.defs
+endif
 
 # Object Files
 

libxx/README.txt

@@ -12,6 +12,10 @@ are recommended:
  - uClibc++   http://cxx.uclibc.org/
  - uSTL       http://ustl.sourceforge.net/
 
+There is a version of uClibc++ that is customized for NuttX that can
+be found here:  misc/uClibc++.  See misc/uClibc++ for installation
+instructions.
+
 At present, only the following are supported here:
 
  - void *operator new(std::size_t nbytes);
@@ -19,6 +23,7 @@ At present, only the following are supported here:
  - void operator delete[](void *ptr);
  - void __cxa_pure_virtual(void);
  - int __aeabi_atexit(void* object, void (*destroyer)(void*), void *dso_handle);
+ - int __cxa_atexit(__cxa_exitfunc_t func, FAR void *arg, FAR void *dso_handle);
  
 operator new
 ------------

libxx/libxx_cxa_atexit.cxx

@@ -130,6 +130,9 @@ extern "C"
         {
           // Register the function to be called when the task/thread exists.
 
+          alloc->func = func;
+          alloc->arg  = arg;
+
           return on_exit(__cxa_callback, alloc);
         }
       else