[Bug target/116827] New C++ failures in macOS 15

[fxcoudert at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116827

--- Comment #4 from Francois-Xavier Coudert <fxcoudert at gcc dot gnu.org> ---
Simple reproducer without any libstdc++ indeed:

$ cat a.cpp 
#include <wchar.h>
$ g++ a.cpp -fmodule-header