include/msvcrt: Add noreturn attributes.

include/msvcrt/crtdefs.h

@@ -117,6 +117,16 @@
 # endif
 #endif
 
+#ifndef DECLSPEC_NORETURN
+# if defined(_MSC_VER) && (_MSC_VER >= 1200) && !defined(MIDL_PASS)
+#  define DECLSPEC_NORETURN __declspec(noreturn)
+# elif defined(__GNUC__)
+#  define DECLSPEC_NORETURN __attribute__((noreturn))
+# else
+#  define DECLSPEC_NORETURN
+# endif
+#endif
+
 #ifndef DECLSPEC_ALIGN
 # if defined(_MSC_VER) && (_MSC_VER >= 1300) && !defined(MIDL_PASS)
 #  define DECLSPEC_ALIGN(x) __declspec(align(x))

include/msvcrt/eh.h

@@ -40,8 +40,8 @@ terminate_function __cdecl set_terminate(terminate_function func);
 unexpected_function __cdecl set_unexpected(unexpected_function func);
 _se_translator_function __cdecl set_se_translator(_se_translator_function func);
 
-void __cdecl terminate(void);
-void __cdecl unexpected(void);
+void __cdecl terminate(void) DECLSPEC_NORETURN;
+void __cdecl unexpected(void) DECLSPEC_NORETURN;
 
 #include <poppack.h>
 

include/msvcrt/process.h

@@ -30,8 +30,8 @@ typedef unsigned int (__stdcall *_beginthreadex_start_routine_t)(void *);
 uintptr_t __cdecl _beginthread(_beginthread_start_routine_t,unsigned int,void*);
 uintptr_t __cdecl _beginthreadex(void*,unsigned int,_beginthreadex_start_routine_t,void*,unsigned int,unsigned int*);
 intptr_t  __cdecl _cwait(int*,intptr_t,int);
-void      __cdecl _endthread(void);
-void      __cdecl _endthreadex(unsigned int);
+void      __cdecl _endthread(void) DECLSPEC_NORETURN;
+void      __cdecl _endthreadex(unsigned int) DECLSPEC_NORETURN;
 intptr_t  WINAPIV _execl(const char*,const char*,...);
 intptr_t  WINAPIV _execle(const char*,const char*,...);
 intptr_t  WINAPIV _execlp(const char*,const char*,...);
@@ -52,9 +52,9 @@ intptr_t  __cdecl _spawnvpe(int,const char*,const char* const *,const char* cons
 
 void      __cdecl _c_exit(void);
 void      __cdecl _cexit(void);
-void      __cdecl _exit(int);
-void      __cdecl abort(void);
-void      __cdecl exit(int);
+void      __cdecl _exit(int) DECLSPEC_NORETURN;
+void      __cdecl abort(void) DECLSPEC_NORETURN;
+void      __cdecl exit(int) DECLSPEC_NORETURN;
 int       __cdecl system(const char*);
 
 #ifndef _WPROCESS_DEFINED

include/msvcrt/stdlib.h

@@ -184,9 +184,9 @@ errno_t       __cdecl _ui64toa_s(unsigned __int64,char*,size_t,int);
 char*         __cdecl _ultoa(__msvcrt_ulong,char*,int);
 errno_t       __cdecl _ultoa_s(__msvcrt_ulong,char*,size_t,int);
 
-void          __cdecl _Exit(int);
-void          __cdecl _exit(int);
-void          __cdecl abort(void);
+void          __cdecl _Exit(int) DECLSPEC_NORETURN;
+void          __cdecl _exit(int) DECLSPEC_NORETURN;
+void          __cdecl abort(void) DECLSPEC_NORETURN;
 int           __cdecl abs(int);
 int           __cdecl atexit(void (__cdecl *)(void));
 double        __cdecl atof(const char*);
@@ -200,7 +200,7 @@ div_t  __cdecl div(int,int);
 ldiv_t __cdecl ldiv(__msvcrt_long,__msvcrt_long);
 #endif
 lldiv_t       __cdecl lldiv(__int64,__int64);
-void          __cdecl exit(int);
+void          __cdecl exit(int) DECLSPEC_NORETURN;
 void          __cdecl free(void*);
 char*         __cdecl getenv(const char*);
 __msvcrt_long __cdecl labs(__msvcrt_long);