text: #ifndef BENCHMARK_INTERNAL_MACROS_H_
  #define BENCHMARK_INTERNAL_MACROS_H_
  
  #include "benchmark/benchmark.h"
  
  /* Needed to detect STL */
  #include <cstdlib>
  
  // clang-format off
  
  #ifndef __has_feature
  #define __has_feature(x) 0
  #endif
  #ifndef __has_builtin
  #define __has_builtin(x) 0
  #endif
  
  #if defined(__clang__)
    #if !defined(COMPILER_CLANG)
      #define COMPILER_CLANG
    #endif
  #elif defined(_MSC_VER)
    #if !defined(COMPILER_MSVC)
      #define COMPILER_MSVC
    #endif
  #elif defined(__GNUC__)
    #if !defined(COMPILER_GCC)
      #define COMPILER_GCC
    #endif
  #endif
  
  #if __has_feature(cxx_attributes)
    #define BENCHMARK_NORETURN [[noreturn]]
  #elif defined(__GNUC__)
    #define BENCHMARK_NORETURN __attribute__((noreturn))
  #elif defined(COMPILER_MSVC)
    #define BENCHMARK_NORETURN __declspec(noreturn)
  #else
    #define BENCHMARK_NORETURN
  #endif
  
  #if defined(__CYGWIN__)
    #define BENCHMARK_OS_CYGWIN 1
  #elif defined(_WIN32)
    #define BENCHMARK_OS_WINDOWS 1
  #elif defined(__APPLE__)
    #define BENCHMARK_OS_APPLE 1
    #include "TargetConditionals.h"
    #if defined(TARGET_OS_MAC)
      #define BENCHMARK_OS_MACOSX 1
      #if defined(TARGET_OS_IPHONE)
        #define BENCHMARK_OS_IOS 1
      #endif
    #endif
  #elif defined(__FreeBSD__)
    #define BENCHMARK_OS_FREEBSD 1
  #elif defined(__NetBSD__)
    #define BENCHMARK_OS_NETBSD 1
  #elif defined(__OpenBSD__)
    #define BENCHMARK_OS_OPENBSD 1
  #elif defined(__linux__)
    #define BENCHMARK_OS_LINUX 1
  #elif defined(__native_client__)
    #define BENCHMARK_OS_NACL 1
  #elif defined(__EMSCRIPTEN__)
    #define BENCHMARK_OS_EMSCRIPTEN 1
  #elif defined(__rtems__)
    #define BENCHMARK_OS_RTEMS 1
  #elif defined(__Fuchsia__)
  #define BENCHMARK_OS_FUCHSIA 1
  #elif defined (__SVR4) && defined (__sun)
  #define BENCHMARK_OS_SOLARIS 1
  #endif
  
  #if defined(__ANDROID__) && defined(__GLIBCXX__)
  #define BENCHMARK_STL_ANDROID_GNUSTL 1
  #endif
  
  #if !__has_feature(cxx_exceptions) && !defined(__cpp_exceptions) \
       && !defined(__EXCEPTIONS)
    #define BENCHMARK_HAS_NO_EXCEPTIONS
  #endif
  
  #if defined(COMPILER_CLANG) || defined(COMPILER_GCC)
    #define BENCHMARK_MAYBE_UNUSED __attribute__((unused))
  #else
    #define BENCHMARK_MAYBE_UNUSED
  #endif
  
  #if defined(COMPILER_GCC) || __has_builtin(__builtin_unreachable)
    #define BENCHMARK_UNREACHABLE() __builtin_unreachable()
  #elif defined(COMPILER_MSVC)
    #define BENCHMARK_UNREACHABLE() __assume(false)
  #else
    #define BENCHMARK_UNREACHABLE() ((void)0)
  #endif
  
  // clang-format on
  
  #endif  // BENCHMARK_INTERNAL_MACROS_H_
  