[libcxx-commits] [libcxx] [libc++] Make std::align an inline function from v2 ABI (PR #167472)

[via libcxx-commits]

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@@ -11,14 +11,33 @@
 
 #include <__config>
 #include <__cstddef/size_t.h>
+#include <cstdint>
 
 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
 #  pragma GCC system_header
 #endif
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
+// From >=v2 ABI, std::align is an inline function.
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poor-circle wrote:

So we should make it always an inline function and try to keep the symbol in ABI v1 like this:?

```cpp
// memory.cpp
constinit auto* __align_abi_keeper = align;
```

https://github.com/llvm/llvm-project/pull/167472