C++11 build fails on Apple Clang because destroy_at is declared constexpr void

[kiranj26]

Description

Building from develop fails with C++11 on Apple Clang due to destroy_at in src/Defines.h being declared as constexpr void in the C++11 path.

Expected behavior

Project builds successfully with C++11.

Actual behavior

Compilation fails with an error similar to:
constexpr function's return type 'void' is not a literal type

Reproduction

1. Checkout develop
2. Run:
   • python setup.py
   • ./build_test.sh
3. Observe compile failure in src/Defines.h at the C++11 destroy_at declaration.

Environment

• OS: macOS (arm64)
• Compiler: Apple Clang 17
• C++ standard: C++11

Notes

A minimal fix is to change the C++11 declaration from:
constexpr void destroy_at(T* p)
to:
inline void destroy_at(T* p)
while keeping C++14/C++17+ behavior unchanged.

[BartHertog]

Hi @kiranj26,

Thanks for writing this up!
I will be able to merge this in later this week or early next week.

In the meantime, may I ask you, do you use Mac for embedded development? I have not had many people run the software Mac so I would be great to learn a bit more about your use case.

Best regards,

Bart