clang/test/Headers/c11.c

   1 // RUN: rm -rf %t
   2 // RUN: %clang_cc1 -fsyntax-only -verify -std=c11 %s
   3 // RUN: %clang_cc1 -fsyntax-only -verify -std=c11 -fmodules -fmodules-cache-path=%t %s -D__STDC_WANT_LIB_EXT1__=1
   4 // RUN: %clang_cc1 -fsyntax-only -verify -std=c11 -ffreestanding %s
   5 // RUN: %clang_cc1 -fsyntax-only -verify -std=c11 -triple i686-pc-win32 -fms-compatibility-version=17.00 %s
   6
   7 noreturn int f(void); // expected-error 1+{{}}
   8
   9 #include <stdnoreturn.h>
  10 #include <stdnoreturn.h>
  11 #include <stdnoreturn.h>
  12
  13 int g(void);
  14 noreturn int g(void);
  15 int noreturn g(void);
  16 int g(void);
  17
  18 #include <stdalign.h>
  19 _Static_assert(__alignas_is_defined, "");
  20 _Static_assert(__alignof_is_defined, "");
  21 alignas(alignof(int)) char c[4];
  22 _Static_assert(__alignof(c) == 4, "");
  23
  24 #define __STDC_WANT_LIB_EXT1__ 1
  25 #include <stddef.h>
  26 rsize_t x = 0;
  27 _Static_assert(sizeof(max_align_t) >= sizeof(long long), "");
  28 _Static_assert(alignof(max_align_t) >= alignof(long long), "");
  29 _Static_assert(sizeof(max_align_t) >= sizeof(long double), "");
  30 _Static_assert(alignof(max_align_t) >= alignof(long double), "");
  31
  32 #ifdef _MSC_VER
  33 _Static_assert(sizeof(max_align_t) == sizeof(double), "");
  34 #endif
  35
  36 // If we are freestanding, then also check RSIZE_MAX (in a hosted implementation
  37 // we will use the host stdint.h, which may not yet have C11 support).
  38 #ifndef __STDC_HOSTED__
  39 #include <stdint.h>
  40 rsize_t x2 = RSIZE_MAX;
  41 #endif
  42