swap two macro tests to avoid warning

["Zhao, Weiming" <weimingz@codeaurora.org>]

HI,

When I use MUSL in some C++ project building, I got the warning of 
'__STDC_VERSION__' is not defined

How about we first check if __cplusplus is defined? if yes, the the 
__STD_VERSION__ test will be short circuited and won't trigger the warning.

diff --git a/include/assert.h b/include/assert.h
index 8571f21..9d7a05b 100644
--- a/include/assert.h
+++ b/include/assert.h
@@ -12,7 +12,7 @@
  #endif
  #endif

-#if __STDC_VERSION__ >= 201112L && !defined(__cplusplus)
+#if !defined(__cplusplus) && __STDC_VERSION__ >= 201112L
  #define static_assert _Static_assert
  #endif

diff --git a/include/features.h b/include/features.h
index 3cc3e57..64671b3 100644
--- a/include/features.h
+++ b/include/features.h
@@ -16,21 +16,27 @@
  #define _XOPEN_SOURCE 700
  #endif

+#ifndef __cplusplus
  #if __STDC_VERSION__ >= 199901L
  #define __restrict restrict
  #elif !defined(__GNUC__)
  #define __restrict
  #endif
+#endif

-#if __STDC_VERSION__ >= 199901L || defined(__cplusplus)
+#if defined(__cplusplus) || __STDC_VERSION__ >= 199901L
  #define __inline inline
  #endif

+#ifdef __cplusplus
+#define _Noreturn [[noreturn]]
+#else
  #if __STDC_VERSION__ >= 201112L
  #elif defined(__GNUC__)
  #define _Noreturn __attribute__((__noreturn__))
  #else
  #define _Noreturn
  #endif
+#endif

  #endif

Thanks,
Weiming

-- 
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation