[libcxx-commits] [libcxx] [libc++] Guard additional headers with _LIBCPP_HAS_LOCALIZATION (PR #131921)

[Dominik Wójt via libcxx-commits]

dominik-wojt-2311446 wrote:

Hi, indeed, I am no longer maintaining the picolibc tests.
This error reminds me of https://github.com/llvm/llvm-project/pull/74072 

Maybe `_NEWLIB_VERSION` is not defined in some context where `libcxx/include/__fwd/ios.h` is included. (just a guess)
```
#if defined(_NEWLIB_VERSION)
// On newlib, off_t is 'long int'
using streamoff = long int; // for char_traits in <string>
#else
using streamoff = long long; // for char_traits in <string>
#endif
```

https://github.com/llvm/llvm-project/pull/131921