arch/x86_64/src/boot/initialize_runtime.cpp


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#include <algorithm>
#include <functional>
#include <span>

extern "C"
{
  using global_initializer = auto (*)() -> void;

  extern global_initializer __ctors_start;
  extern global_initializer __ctors_end;
  extern global_initializer __init_array_start;
  extern global_initializer __init_array_end;

  auto invoke_global_constructors() -> void
  {
    auto constructors = std::span{&__ctors_start, &__ctors_end};
    auto initializers = std::span{&__init_array_start, &__init_array_end};

    auto apply_invoke = [](auto invokable) -> void {
      std::invoke(invokable);
    };

    std::ranges::for_each(constructors, apply_invoke);
    std::ranges::for_each(initializers, apply_invoke);
  }
}