--- Gnu-Mach/i386/include/mach/sa/stdarg.h	2020/09/02 04:36:57	1.1.1.1
+++ Gnu-Mach/i386/include/mach/sa/stdarg.h	2020/09/02 04:46:46	1.1.1.3
@@ -29,7 +29,17 @@
 #ifndef _MACH_SA_STDARG_H_
 #define _MACH_SA_STDARG_H_
 
-#define __va_size(type) ((sizeof(type)+3) & ~0x3)
+#if __GNUC__ >= 3
+
+typedef __builtin_va_list va_list;
+
+#define va_start(v,l)	__builtin_va_start(v,l)
+#define va_end(v)	__builtin_va_end(v)
+#define va_arg(v,l)	__builtin_va_arg(v,l)
+
+#else
+
+#define __va_size(type) ((sizeof(type)+sizeof(unsigned long)-1) & ~(sizeof(unsigned long)-1))
 
 #ifndef _VA_LIST_
 #define _VA_LIST_
@@ -43,4 +53,6 @@ typedef	char *va_list;
 	((pvar) += __va_size(type),		\
 	 *((type *)((pvar) - __va_size(type))))
 
-#endif _MACH_SA_STDARG_H_
+#endif
+
+#endif /* _MACH_SA_STDARG_H_ */