g2gps commented on PR #8173:
URL: https://github.com/apache/nuttx/pull/8173#issuecomment-1397810269
> Could you give a list of the function not implemented by NuttX yet. I can
take time to implement them.
The complete list of unimplemented functions is:
```c
int at_quick_exit(void (*func)(void))
void quick_exit(int status);
int openat(int dirfd, const char *pathname, int flags);
int unlinkat(int dirfd, const char *pathname, int flags);
```
There is alternate implementation in libcxx for `__remove_all` which removes
the need for `openat` and `unlinkat`. This is enabled with `#define
REMOVE_ALL_USE_DIRECTORY_ITERATOR`, which I had previously added to
`__config_site`.
For `at_quick_exit` and `quick_exit`, there either needs to be
implementations in NuttX, or they are patched out. Like so:
```diff
diff --git a/libcxx/include/cstdlib b/libcxx/include/cstdlib
index 457c31f625d8..40ecdfac969d 100644
--- a/libcxx/include/cstdlib
+++ b/libcxx/include/cstdlib
@@ -132,8 +132,8 @@ using ::wctomb _LIBCPP_USING_IF_EXISTS;
using ::mbstowcs _LIBCPP_USING_IF_EXISTS;
using ::wcstombs _LIBCPP_USING_IF_EXISTS;
#if !defined(_LIBCPP_CXX03_LANG)
-using ::at_quick_exit _LIBCPP_USING_IF_EXISTS;
-using ::quick_exit _LIBCPP_USING_IF_EXISTS;
+// using ::at_quick_exit _LIBCPP_USING_IF_EXISTS;
+// using ::quick_exit _LIBCPP_USING_IF_EXISTS;
#endif
#if _LIBCPP_STD_VER > 14
using ::aligned_alloc _LIBCPP_USING_IF_EXISTS;
```
If the above is done, cxxlib version `15.0.7` works with c++20, with no
further modification. The patch I added previously still needs to be used in
order to support c++17.
--
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
To unsubscribe, e-mail: [email protected]
For queries about this service, please contact Infrastructure at:
[email protected]
