C++ Standard

Like many projects, the PyTorch C++ library regularly adapts its minimum required C++ standard version to newer versions in order to benefit from the respective language and standard library improvements. In the past, the C++ standard has been numped for the following releases:

• C++11 → C++14: PyTorch 1.5 (see release announcement)

• C++14 → C++17: PyTorch 2.1 (see release announcement)

Future versions may further increase the used standard to, e.g., C++20.

However, the PyTorch C++ library does not publicly expose this requirement to projects linking against it which may lead to compiler errors in the following cases:

• The project explicitly only needs a lower standard, e.g. set(CMAKE_CXX_STANDARD 11) for C++11

• The project relies on the default standard selected of the compiler, e.g. C++14 for MSVC

CharonLoad automatically detects the minimum required C++ standard in order to use the PyTorch C++ library and sets the corresponding CMake Compile Feature.