--- gcc/config/i386/sco.h	2018/04/24 18:10:27	1.1.1.1
+++ gcc/config/i386/sco.h	2018/04/24 18:30:43	1.1.1.4
@@ -1,5 +1,22 @@
-/* Definitions for Intel 386 running SCO Unix System V.  */
+/* Definitions for Intel 386 running SCO Unix System V.
+   Copyright (C) 1988, 1992, 1994, 1995 Free Software Foundation, Inc.
 
+This file is part of GNU CC.
+
+GNU CC is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU CC is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU CC; see the file COPYING.  If not, write to
+the Free Software Foundation, 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA.  */
 
 /* Mostly it's like AT&T Unix System V. */
 
@@ -16,6 +33,11 @@
 #undef TARGET_DEFAULT
 #define TARGET_DEFAULT 0201
 
+/* Let's guess that the SCO software FPU emulator can't handle
+   80-bit XFmode insns, so don't generate them.  */
+#undef LONG_DOUBLE_TYPE_SIZE
+#define LONG_DOUBLE_TYPE_SIZE 64
+
 /* Use crt1.o as a startup file and crtn.o as a closing file.  */
 
 #undef STARTFILE_SPEC
@@ -33,7 +55,7 @@
 /* Specify predefined symbols in preprocessor.  */
 
 #undef CPP_PREDEFINES
-#define CPP_PREDEFINES "-Dunix -Di386 -DM_UNIX -DM_I386 -DM_COFF -DM_WORDSWAP"
+#define CPP_PREDEFINES "-Dunix -Di386 -DM_UNIX -DM_I386 -DM_COFF -DM_WORDSWAP -Asystem(unix) -Asystem(svr3) -Acpu(i386) -Amachine(i386)"
 
 #undef CPP_SPEC
 #define CPP_SPEC "%{scointl:-DM_INTERNAT}"
@@ -62,7 +84,8 @@
 
 #undef VALUE_REGNO
 #define VALUE_REGNO(MODE) \
-  ((TARGET_80387 && ((MODE) == SFmode || (MODE) == DFmode))
+  ((TARGET_80387
+     && ((MODE) == SFmode || (MODE) == DFmode || (MODE) == XFmode)
    ? FIRST_FLOAT_REG : 0)
 
 #undef HARD_REGNO_MODE_OK
@@ -80,7 +103,7 @@
    structures. */
 
 #undef RETURN_POPS_ARGS
-#define RETURN_POPS_ARGS(FUNTYPE,SIZE)   \
+#define RETURN_POPS_ARGS(FUNDECL,FUNTYPE,SIZE)   \
   (TREE_CODE (FUNTYPE) == IDENTIFIER_NODE ? 0			\
    : (TARGET_RTD						\
       && (TYPE_ARG_TYPES (FUNTYPE) == 0				\
@@ -88,4 +111,7 @@
 	      == void_type_node))) ? (SIZE)			\
    : 0)
 /* On other 386 systems, the last line looks like this:
-   : (aggregate_value_p (FUNTYPE)) ? GET_MODE_SIZE (Pmode) : 0)  */
+   : (aggregate_value_p (TREE_TYPE (FUNTYPE))) ? GET_MODE_SIZE (Pmode) : 0)  */
+
+/* Handle #pragma pack. */
+#define HANDLE_SYSV_PRAGMA