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Posted to commits@nuttx.apache.org by GitBox <gi...@apache.org> on 2020/10/23 12:19:33 UTC
[GitHub] [incubator-nuttx] yamt commented on a change in pull request #2072: libxx: Update README
yamt commented on a change in pull request #2072:
URL: https://github.com/apache/incubator-nuttx/pull/2072#discussion_r510843553
##########
File path: libs/libxx/README.txt
##########
@@ -1,28 +1,44 @@
libs/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:
+This directory contains three C++ library:
+
+ - 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.
+
+ 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);
+ - int __cxa_atexit(__cxa_exitfunc_t func, FAR void *arg,
+ FAR void *dso_handle);
+
+ This implementation is selected when neither of the following
+ two options are enabled.
+
+ - LLVM "libc++" C++ library (http://libcxx.llvm.org/)
+ This implementation is selected with CONFIG_LIBCXX=y.
+
+ - uClibc++ C++ library (http://cxx.uclibc.org/)
+ This implementation is selected with CONFIG_UCLIBCXX=y.
+
+If you have a need for more extensive C++ support, the following
+libraries might be usable too:
- libstdc++ (part of GCC)
- STLport http://www.stlport.org/
- - uClibc++ http://cxx.uclibc.org/
- uSTL http://ustl.sourceforge.net/
-There is a version of uClibc++ that has been customized for use with NuttX.
-That version that can be found in the NuttX uClibc++ GIT repository. Refer
-to the top-level uClibc++ README.txt file for installation instructions.
-
-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);
- - int __cxa_atexit(__cxa_exitfunc_t func, FAR void *arg, FAR void *dso_handle);
+There is another version of uClibc++ that has been customized for
+use with NuttX. That version that can be found in the NuttX
+uClibc++ GIT repository. (https://bitbucket.org/nuttx/uclibc/src/master/)
Review comment:
maybe. i don't know the state of the repo.
##########
File path: libs/libxx/README.txt
##########
@@ -1,28 +1,44 @@
libs/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:
+This directory contains three C++ library:
+
+ - 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.
+
+ 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);
+ - int __cxa_atexit(__cxa_exitfunc_t func, FAR void *arg,
+ FAR void *dso_handle);
+
+ This implementation is selected when neither of the following
+ two options are enabled.
+
+ - LLVM "libc++" C++ library (http://libcxx.llvm.org/)
+ This implementation is selected with CONFIG_LIBCXX=y.
+
+ - uClibc++ C++ library (http://cxx.uclibc.org/)
+ This implementation is selected with CONFIG_UCLIBCXX=y.
+
+If you have a need for more extensive C++ support, the following
+libraries might be usable too:
- libstdc++ (part of GCC)
- STLport http://www.stlport.org/
- - uClibc++ http://cxx.uclibc.org/
- uSTL http://ustl.sourceforge.net/
Review comment:
i have no idea.
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