--- mstools/h/signal.h	2018/08/09 18:20:01	1.1
+++ mstools/h/signal.h	2018/08/09 18:23:04	1.1.1.4
@@ -1,7 +1,7 @@
 /***
 *signal.h - defines signal values and routines
 *
-*	Copyright (c) 1985-1991, Microsoft Corporation. All rights reserved.
+*	Copyright (c) 1985-1993, Microsoft Corporation. All rights reserved.
 *
 *Purpose:
 *	This file defines the signal values and declares the signal functions.
@@ -16,10 +16,29 @@ extern "C" {
 #endif
 
 
-#if (_MSC_VER <= 600)
-#define __cdecl _cdecl
+/*
+ * Conditional macro definition for function calling type and variable type
+ * qualifiers.
+ */
+#if   ( (_MSC_VER >= 800) && (_M_IX86 >= 300) )
+
+/*
+ * Definitions for MS C8-32 (386/486) compiler
+ */
+#define _CRTAPI1 __cdecl
+#define _CRTAPI2 __cdecl
+
+#else
+
+/*
+ * Other compilers (e.g., MIPS)
+ */
+#define _CRTAPI1
+#define _CRTAPI2
+
 #endif
 
+
 #ifndef _SIG_ATOMIC_T_DEFINED
 typedef int sig_atomic_t;
 #define _SIG_ATOMIC_T_DEFINED
@@ -34,29 +53,26 @@ typedef int sig_atomic_t;
 #define SIGFPE		8	/* floating point exception */
 #define SIGSEGV 	11	/* segment violation */
 #define SIGTERM 	15	/* Software termination signal from kill */
-#define SIGUSR1 	16	/* User defined signal 1 */
-#define SIGUSR2 	17	/* User defined signal 2 */
-#define SIGUSR3 	20	/* User defined signal 3 */
 #define SIGBREAK	21	/* Ctrl-Break sequence */
 #define SIGABRT 	22	/* abnormal termination triggered by abort call */
 
 
 /* signal action codes */
 
-#define SIG_DFL (void (*)(int))0	   /* default signal action */
-#define SIG_IGN (void (*)(int))1	   /* ignore signal */
-#define SIG_SGE (void (*)(int))3	   /* signal gets error */
-#define SIG_ACK (void (*)(int))4	   /* acknowledge */
+#define SIG_DFL (void (_CRTAPI1 *)(int))0	    /* default signal action */
+#define SIG_IGN (void (_CRTAPI1 *)(int))1	    /* ignore signal */
+#define SIG_SGE (void (_CRTAPI1 *)(int))3	    /* signal gets error */
+#define SIG_ACK (void (_CRTAPI1 *)(int))4	    /* acknowledge */
 
 
 /* signal error value (returned by signal call on error) */
 
-#define SIG_ERR (void (*)(int))-1	     /* signal error value */
+#define SIG_ERR (void (_CRTAPI1 *)(int))-1	    /* signal error value */
 
 /* pointer to exception information pointers structure */
 
 #ifdef	_MT
-extern void * * __pxcptinfoptrs(void);
+extern void * * _CRTAPI1 __pxcptinfoptrs(void);
 #define _pxcptinfoptrs	(*__pxcptinfoptrs())
 #else
 extern void * _pxcptinfoptrs;
@@ -64,8 +80,8 @@ extern void * _pxcptinfoptrs;
 
 /* function prototypes */
 
-void (* signal(int, void (*)(int)))(int);
-int raise(int);
+void (_CRTAPI1 * _CRTAPI1 signal(int, void (_CRTAPI1 *)(int)))(int);
+int _CRTAPI1 raise(int);
 
 #ifdef __cplusplus
 }