Upated NxWM comments

git-svn-id: https://nuttx.svn.sourceforge.net/svnroot/nuttx/trunk@4692 7fd9a85b-ad96-42d3-883c-3090e2eb8679

1 files changed, 37 insertions, 36 deletions

diff --git a/nuttx/libxx/README.txt b/nuttx/libxx/README.txt
index c97dae4ba4..6cf066f080 100644
--- a/nuttx/libxx/README.txt
+++ b/nuttx/libxx/README.txt
@@ -1,36 +1,37 @@
-libxx/README.txt

-^^^^^^^^^^^^^^^^

-

-This directory contains a fragmentary C++ library that will allow

-to build only the simplest of C++ applications.  In the deeply

-embedded world, that is probably all that is necessary.  If you

-have a need for more extensive C++ support, the following libraries

-are recommended:

-

- - libstdc++  (part of GCC)

- - STLport    http://www.stlport.org/ 

- - uClibc++   http://cxx.uclibc.org/

-

-At present, only the following are supported here:

-

- - void *operator new(std::size_t nbytes);

- - void operator delete(void* ptr);

- - void operator delete[](void *ptr);

- - void __cxa_pure_virtual(void);

- - int __aeabi_atexit(void* object, void (*destroyer)(void*), void *dso_handle);

- 

-operator new

-------------

-

-  This operator should take a type of size_t.  But size_t has an unknown underlying

-  type.  In the nuttx sys/types.h header file, size_t is typed as uint32_t

-  (which is determined by architecture-specific logic).  But the C++

-  compiler may believe that size_t is of a different type resulting in

-  compilation errors in the operator.  Using the underlying integer type

-  instead of size_t seems to resolve the compilation issues. Need to

-  REVISIT this.

-

-  Once some C++ compilers, this will cause an error:

-

-    Problem:     "'operator new' takes size_t ('...') as first parameter"

-    Workaround:  Add -fpermissive to the compilation flags

+libxx/README.txt
+^^^^^^^^^^^^^^^^
+
+This directory contains a fragmentary C++ library that will allow
+to build only the simplest of C++ applications.  In the deeply
+embedded world, that is probably all that is necessary.  If you
+have a need for more extensive C++ support, the following libraries
+are recommended:
+
+ - libstdc++  (part of GCC)
+ - STLport    http://www.stlport.org/ 
+ - uClibc++   http://cxx.uclibc.org/
+ - uSTL       http://ustl.sourceforge.net/
+
+At present, only the following are supported here:
+
+ - void *operator new(std::size_t nbytes);
+ - void operator delete(void* ptr);
+ - void operator delete[](void *ptr);
+ - void __cxa_pure_virtual(void);
+ - int __aeabi_atexit(void* object, void (*destroyer)(void*), void *dso_handle);
+ 
+operator new
+------------
+
+  This operator should take a type of size_t.  But size_t has an unknown underlying
+  type.  In the nuttx sys/types.h header file, size_t is typed as uint32_t
+  (which is determined by architecture-specific logic).  But the C++
+  compiler may believe that size_t is of a different type resulting in
+  compilation errors in the operator.  Using the underlying integer type
+  instead of size_t seems to resolve the compilation issues. Need to
+  REVISIT this.
+
+  Once some C++ compilers, this will cause an error:
+
+    Problem:     "'operator new' takes size_t ('...') as first parameter"
+    Workaround:  Add -fpermissive to the compilation flags