https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120299
--- Comment #1 from Tymi ---
The following code does not compile with libstdc++ under clang:
```cpp
#include
int main(){}
```
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120299
--- Comment #3 from Andrew Pinski ---
So the complex part of this is because clang does not implement the C23 defined
types still (https://github.com/llvm/llvm-project/issues/97335) but does
implement __float128 and libstdc++ looks like uses tho
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120299
--- Comment #2 from Andrew Pinski ---
For GCC:
# 1923 "/opt/compiler-explorer/gcc-trunk-20250515/include/c++/16.0.0/format" 3
using __flt128_t = _Float128;
# 1955 "/opt/compiler-explorer/gcc-trunk-20250515/include/c++/16.0.0/format" 3
Which
