framework-arduinoteensy-cxx20/libraries/FastLED/cpp_compat.h

#ifndef __INC_CPP_COMPAT_H
#define __INC_CPP_COMPAT_H

#include "FastLED.h"

#if __cplusplus <= 199711L

#define static_assert(expression, message)
#define constexpr const

#else

// things that we can turn on if we're in a C++11 environment
#endif

#endif