Fix DJGPP build

GNUmakef.def

@@ -84,6 +84,7 @@ SHELL=sh
 EXEEXT=.exe
 OBJEXT=.o
 LIBEXT=.a
+CFLAGS+=-DHAVE_STDARG_H
 else
 ifeq ($(PLATFORM),be)
 CAT=cat

goldlib/gall/gstrutil.cpp

@@ -69,6 +69,12 @@ int vsnprintf( char *buffer, size_t sizeOfBuffer, const char *format, va_list ar
 
 #if !defined(HAVE_SNPRINTF) || !defined(HAVE_VSNPRINTF)
 # include "snprintf.c"
+# if defined(HAVE__SNPRINTF)
+#  define HAVE_SNPRINTF 1
+# endif
+# if defined(HAVE__VSNPRINTF)
+#  define HAVE_VSNPRINTF 1
+# endif
 #endif
 
 //--------------------------------------------------------------------