#ifndef __EMSCRIPTEN__
#error __EMSCRIPTEN__ is not defined
#endif
#ifndef __asmjs__
#error __asmjs__ is not defined
#endif
#ifdef __cplusplus
#ifndef _GNU_SOURCE
#error _GNU_SOURCE is not defined in C++
#endif
#endif
#ifndef __unix__
#error __unix__ is not defined
#endif
#ifndef __LITTLE_ENDIAN__
#error __LITTLE_ENDIAN__ is not defined
#endif

#ifdef __clang__
#if __has_feature(pnacl)
#error has feature pnacl
#endif
#endif

#ifdef __native_client__
#error __native_client__ is defined
#endif
#ifdef __pnacl__
#error __pnacl__ is defined
#endif
#ifdef __ELF__
#error __ELF__ is defined
#endif
#ifdef __i386__
#error __i386__ is defined
#endif
#ifdef __i386
#error __i386 is defined
#endif
#ifdef i386
#error i386 is defined
#endif
#ifdef __SSE__
#error __SSE__ is defined
#endif
#ifdef __SSE2__
#error __SSE2__ is defined
#endif
#ifdef __SSE_MATH__
#error __SSE_MATH__ is defined
#endif
#ifdef __SSE2_MATH__
#error __SSE2_MATH__ is defined
#endif
#ifdef __MMX__
#error __MMX__ is defined
#endif
#ifdef __APPLE__
#error __APPLE__ is defined
#endif
#ifdef __linux__
#error __linux__ is defined
#endif
#ifdef __BIG_ENDIAN__
#error __BIG_ENDIAN__ is defined
#endif
#ifdef __LP64__
#error __LP64__ is defined
#endif

// We prefer to use __EMSCRIPTEN__, but for compatibility, we define
// EMSCRIPTEN too.
#ifndef EMSCRIPTEN
#error EMSCRIPTEN is not defined
#endif

#include <stdint.h>
#include <stddef.h>
#include <string.h>
#include <assert.h>

#define STRINGIZE_HELPER(x) #x
#define STRINGIZE(x) STRINGIZE_HELPER(x)

int main() {
  assert(sizeof(void*) == 4);
  assert(sizeof(long) == 4);
  assert(sizeof(intmax_t) == 8);
  assert(__alignof(double) == 8);
  assert(sizeof(long double) == 8);
  assert(__alignof(long double) == 8);
  assert(sizeof(intptr_t) == 4);
  assert(sizeof(size_t) == 4);
  assert(sizeof(ptrdiff_t) == 4);
  assert(__FLT_EVAL_METHOD__ == 0);
  assert(strcmp(STRINGIZE(__USER_LABEL_PREFIX__), "") == 0);
  return 0;
}