zend_portability: Simplify definition of ZEND_NORETURN

Author: TimWolla

UPGRADING.INTERNALS

@@ -17,6 +17,8 @@ PHP 8.7 INTERNALS UPGRADE NOTES
 - Removed zend_execute_scripts(). Manually call zend_execute_script() in a loop
   instead.
 - Removed ZEND_STATIC_ASSERT(). Use C11 static_assert() directly instead.
+- Removed HAVE_NORETURN and HAVE_NORETURN_ALIAS. ZEND_NORETURN is guaranteed to
+  work.
 
 ========================
 2. Build system changes

Zend/zend_portability.h

@@ -356,14 +356,10 @@ char *alloca();
 # endif
 #endif
 
-#if (defined(__GNUC__) && __GNUC__ >= 3 && !defined(__INTEL_COMPILER) && !defined(__APPLE__) && !defined(__hpux) && !defined(_AIX) && !defined(__osf__)) || __has_attribute(noreturn)
-# define HAVE_NORETURN
-# define ZEND_NORETURN __attribute__((noreturn))
-#elif defined(ZEND_WIN32)
-# define HAVE_NORETURN
-# define ZEND_NORETURN __declspec(noreturn)
+#if __STDC_VERSION__ >= 202311L || defined(__cplusplus)
+# define ZEND_NORETURN [[noreturn]]
 #else
-# define ZEND_NORETURN
+# define ZEND_NORETURN _Noreturn
 #endif
 
 #if __has_attribute(force_align_arg_pointer)
@@ -373,7 +369,6 @@ char *alloca();
 #endif
 
 #if (defined(__GNUC__) && __GNUC__ >= 3 && !defined(__INTEL_COMPILER) && !defined(__APPLE__) && !defined(__hpux) && !defined(_AIX) && !defined(__osf__))
-# define HAVE_NORETURN_ALIAS
 # define HAVE_ATTRIBUTE_WEAK
 #endif