Patchkit to build GCC-2.5.7 on SCO Xenix 2.3.x

Modified from the gcc 2.4.5 Patchkit for Xenix 2.3.x
(by Kai Ruottu, Tornio, Finland)

that was first modified from :

the gcc 2.3.3 Patchkit for Xenix 2.3.4
(by Steve Bleazard@RoboBar.Co.Uk)

The original 2.3.3 patchkit seems to work with only minor cosmetic changes
(the new config-subdirectories and new names for the necessary include-files)

The following message contains the necessary modifications and configuration
files to build gcc-2.5.7 for SCO Xenix 2.3.x with Xenix GAS-1.38 and GDB-3.5

What you need:

	SCO XENIX 386 Operating System
	SCO XENIX 386 Development System
	Robobar's Port of GCC-1.40, GAS-1.38 and GDB-3.5
		(patchkits from volume 23 of comp.sources.unix, or the
		 binary distribution available from unix.secs.oakland.edu)
		(I compiled this with gcc 2.4.5 for Xenix, but the gcc 1.40
		 should work too.../ KR)
	Larry Wall's "patch" program, version 2, patchlevel 12.
		(from volume 7 of comp.sources.unix, or the GNU
		 enhanced one from prep.ai.mit.edu)
	The standard GNU distributions of the compiler
		gcc-2.5.7.tar.gz
	This patchkit
		xenpatch.257
	A lot of free disc space.  50 Mb is comfortable.

What to do:

	1. Install Xenix GCC-1.40, GAS-1.38 and GDB-3.5 if they aren't already
	   I assume you have either applied Ronald's fix.h.xenix or have
	   hacked the headers yourself (or use gcc 2.4.5 if you have that...)

	2. Unpack the gcc distribution with 'gtar xzf gcc-2.5.7.tar.gz' or
	   'gzip -d'ing first and 'tar xf'ing then...

	3. cd gcc-2.5.7

	4. patch -p < xenpatch.257 [ie part of this article]

	5. configure with:

		sh ./configure --target=i386-sco-xenix

	6. make a link from /usr/local/lib/gcc-as
	                 to /usr/local/lib/gcc-lib/i386-sco-xenix/as
	   creating directories as required.

	7. Now follow the instructions in INSTALL.  Note that this patchkit
	   has only been tested with LANGUAGES="c c++".  For stage1 I used
	   LANGUAGES=c

	   WARNING:  You may want to make a separate copy of /usr/local/bin/gcc
	   as this is overwritten by the installation of gcc-2.5.7

--- xenpatch.257 --starts---------- Cut Here -----------starts--xenpatch.257---
*** /dev/null	Fri Jan 22 14:41:00 1993
--- README.XENIX	Wed Dec 29 14:00:00 1993
***************
*** 0 ****
--- 1,19 ----
+ This port of GCC-2.5.7 works in conjuction with the Xenix version of gas-1.38
+ and gdb-3.5.  The patchkits for these, as well as gcc-1.40, are available from
+ you nearest comp.sources.misc archive in volume 23.  A complete binary
+ distribution of GCC-1.40, gas-1.38 and GDB-3.5 is also available via anon ftp
+ from unix.secs.oakland.edu.
+
+ Building GCC-2.5.7 under Xenix with the standard Microsoft C compiler has not
+ been tested, nor is likely to work.  To build this version of GCC requires
+ Xenix gcc-1.40 or later.
+
+ On SCO Xenix 2.3.x it is necessary to install a linker helper-program
+ (provided by Christoph Badura <bad@flatlin.ka.sub.org>), in addition to
+ collect2 which is used to handle contructors / destructors.  This is
+ installed as real-ld in the gcc bin directory and calls /bin/ld to do the
+ work.
+
+ To allow for those without a dev sys an assembler version of _fixdfsi
+ has been provided.  This means that OLDCC can be set to gcc without
+ recursion problems.
*** /dev/null	Fri Jan 22 10:51:04 1993
--- __main.c	Wed Dec 29 14:00:00 1993
***************
*** 0 ****
--- 1,96 ----
+ /* Copyright (C) 1989, 1992 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, 675 Mass Ave, Cambridge, MA 02139, USA.  */
+
+ /* As a special exception, if you link this library with files
+    compiled with GCC to produce an executable, this does not cause
+    the resulting executable to be covered by the GNU General Public License.
+    This exception does not however invalidate any other reasons why
+    the executable file might be covered by the GNU General Public License.  */
+
+ /* Xenix main and ctor / dtor handling
+    This is very similar to the standard versions except __CTOR_LIST__ and
+    __DTOR_LIST__ are defined as common in this code as the xenix ld does
+    not appear to resolve data externals correctly. */
+
+
+ #include "tconfig.h"
+ #include "machmode.h"
+
+ #include "gbl-ctors.h"
+
+ /* Run all the global destructors on exit from the program.  */
+
+ func_ptr __CTOR_LIST__[2];
+ func_ptr __DTOR_LIST__[2];
+
+ static void
+ __do_global_xtors (func_ptr *xtors)
+ {
+   unsigned nptrs = (unsigned HOST_WIDE_INT) xtors[0];
+   unsigned i;
+
+   /* Some systems place the number of pointers
+      in the first word of the table.
+      On other systems, that word is -1.
+      In all cases, the table is null-terminated.  */
+
+   /* If the length is not recorded, count up to the null.  */
+   if (nptrs == -1)
+     for (nptrs = 0; xtors[nptrs + 1] != 0; nptrs++);
+
+   /* GNU LD format.  */
+   for (i = nptrs; i >= 1; i--)
+     xtors[i] ();
+ }
+
+ void
+ __do_global_dtors ()
+ {
+   __do_global_xtors(__DTOR_LIST__);
+ }
+
+ #ifndef ON_EXIT
+ #define ON_EXIT(a, b)
+ #endif /* ON_EXIT */
+
+ void
+ __do_global_ctors ()
+ {
+   __do_global_xtors(__CTOR_LIST__);
+   ON_EXIT (__do_global_dtors, 0);
+ }
+
+ /* Subroutine called automatically by `main'.
+    Compiling a global function named `main'
+    produces an automatic call to this function at the beginning.
+
+    For many systems, this routine calls __do_global_ctors.
+    For systems which support a .init section we use the .init section
+    to run __do_global_ctors, so we need not do anything here.  */
+
+ void
+ __main ()
+ {
+   /* Support recursive calls to `main': run initializers just once.  */
+   static int initialized = 0;
+   if (! initialized)
+     {
+       initialized = 1;
+       __do_global_ctors ();
+     }
+ }
*** /dev/null	Fri Jan 22 10:51:04 1993
--- _fixdfsi.asm	Wed Dec 29 14:00:00 1993
***************
*** 0 ****
--- 1,19 ----
+ 	.file	"__fixdfsi.s"
+ .text
+ 	.align 2
+ .globl ___fixdfsi
+ ___fixdfsi:
+ 	pushl %ebp
+ 	movl %esp,%ebp
+ 	subl	$12,%esp
+ 	fstcw	-4(%ebp)
+ 	movw	-4(%ebp),%ax
+ 	orw	$0x0c00,%ax
+ 	movw	%ax,-2(%ebp)
+ 	fldcw	-2(%ebp)
+ 	fldl	8(%ebp)
+ 	fistpl	-12(%ebp)
+ 	fldcw	-4(%ebp)
+ 	movl	-12(%ebp),%eax
+ 	leave
+ 	ret
*** /dev/null	Fri Jan 22 10:51:04 1993
--- config/i386/xenix.h	Wed Dec 29 14:00:00 1993
***************
*** 0 ****
--- 1,261 ----
+ /* Definitions for Intel 386 running SCO Xenix Release 2.3.x. with GAS-1.38
+    Written by Steve Bleazard, new include name (gcc 2.5.7) by Kai Ruottu
+    Copyright (C) 1992 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, 675 Mass Ave, Cambridge, MA 02139, USA.  */
+
+
+ /* Mostly it's like AT&T Unix System V. */
+
+ #include "i386/sysv3.h"
+
+ /* By default, target has a 80387, uses IEEE compatible arithmetic,
+    and returns float values in the 387, ie,
+    (TARGET_80387 | TARGET_FLOAT_RETURNS_IN_80387)
+
+    SCO's software emulation of a 387 fails to handle the `fucomp'
+    opcode.  fucomp is only used when generating IEEE compliant code.
+    So don't make TARGET_IEEE_FP default for SCO. */
+
+ #undef TARGET_DEFAULT
+ #define TARGET_DEFAULT 0241
+
+ /* no #sccs in preprocessor.  */
+
+ #undef SCCS_DIRECTIVE
+
+ /* no #ident */
+
+ #undef ASM_OUTPUT_IDENT
+
+ /* We dont want to output SDB debugging information.  */
+
+ #undef SDB_DEBUGGING_INFO
+
+ /* We want to output DBX debugging information, for use with GDB only  */
+
+ #define DBX_DEBUGGING_INFO
+
+ /* Implicit library calls should use memcpy, not bcopy, etc.  */
+
+ #define TARGET_MEM_FUNCTIONS
+
+ /* use dollars in g++ special names */
+
+ #undef NO_DOLLAR_IN_LABEL
+
+ /* Generate an external symbol request for __fltused if 80387 selected */
+
+ #undef ASM_FILE_START
+ #define ASM_FILE_START(FILE)					\
+   { output_file_directive((FILE), main_input_filename); 	\
+     if (TARGET_80387) 						\
+       fprintf (FILE, "\t.stabs\t\"__fltused\",0,0,0,0\n"); }
+
+ #undef ASM_OUTPUT_LOCAL
+ #define ASM_OUTPUT_LOCAL(FILE, NAME, SIZE, ROUNDED)  \
+ ( fputs (".lcomm ", (FILE)),			\
+   assemble_name ((FILE), (NAME)),		\
+   fprintf ((FILE), ",%u\n", (SIZE)))
+
+ #undef EXTRA_SECTIONS
+ #define EXTRA_SECTIONS in_cdata
+
+ /* Define the additional functions to select our additional sections.  */
+
+ #define CDATA_SECTION_ASM_OP ".data 1"
+
+ #undef EXTRA_SECTION_FUNCTIONS
+ #define EXTRA_SECTION_FUNCTIONS						\
+ void									\
+ const_section ()							\
+ {									\
+   if (in_section != in_cdata)						\
+     {									\
+       fprintf (asm_out_file, "%s\n", CDATA_SECTION_ASM_OP);		\
+       in_section = in_cdata;						\
+     }								\
+ }
+
+ /* This is how to output an assembler line
+    that says to advance the location counter
+    by a multiple of 2**LOG bytes.  */
+
+ #undef ASM_OUTPUT_ALIGN
+ #define ASM_OUTPUT_ALIGN(FILE,LOG)	\
+      if ((LOG)!=0) fprintf ((FILE), "\t.align %d\n", (LOG))
+
+ /* Align labels, etc. at 4-byte boundaries.
+    For the 486, align to 16-byte boundary for sake of cache.  */
+
+ #undef ASM_OUTPUT_ALIGN_CODE
+ #define ASM_OUTPUT_ALIGN_CODE(FILE)			\
+      fprintf ((FILE), "\t.align %d,0x90\n",		\
+ 	      TARGET_486 ? 4 : 2);  /* Use log of 16 or log of 4 as arg.  */
+
+ /* Align start of loop at 4-byte boundary.  */
+
+ #undef ASM_OUTPUT_LOOP_ALIGN
+ #define ASM_OUTPUT_LOOP_ALIGN(FILE) \
+      fprintf ((FILE), "\t.align 2,0x90\n");  /* Use log of 4 as arg.  */
+
+ /* This is how to store into the string BUF
+    the symbol_ref name of an internal numbered label where
+    PREFIX is the class of label and NUM is the number within the class.
+    This is suitable for output with `assemble_name'.  */
+
+ #undef ASM_GENERATE_INTERNAL_LABEL
+ #define ASM_GENERATE_INTERNAL_LABEL(BUF,PREFIX,NUMBER)	\
+   sprintf ((BUF), "*.%s%d", (PREFIX), (NUMBER))
+
+ /* This is how to output an internal numbered label where
+    PREFIX is the class of label and NUM is the number within the class.  */
+
+ #undef ASM_OUTPUT_INTERNAL_LABEL
+ #define ASM_OUTPUT_INTERNAL_LABEL(FILE,PREFIX,NUM)	\
+   fprintf (FILE, ".%s%d:\n", PREFIX, NUM)
+
+ /* This is how to output a reference to a user-level label named NAME.  */
+
+ #undef ASM_OUTPUT_LABELREF
+ #define ASM_OUTPUT_LABELREF(FILE,NAME)	\
+   fprintf (FILE, "_%s", NAME)
+
+ #undef ASM_GLOBALIZE_LABEL
+ #define ASM_GLOBALIZE_LABEL(FILE,NAME)	\
+   (fputs (".globl ", FILE), assemble_name (FILE, NAME), fputs ("\n", FILE))
+
+ #undef INIT_SECTION_ASM_OP
+ #undef ASM_OUTPUT_CONSTRUCTOR
+ #undef ASM_OUTPUT_DESTRUCTOR
+
+ /* A C statement or statements which output an assembler instruction
+    opcode to the stdio stream STREAM.  The macro-operand PTR is a
+    variable of type `char *' which points to the opcode name in its
+    "internal" form--the form that is written in the machine description.
+
+    GAS version 1.38.1 doesn't understand the `repz' opcode mnemonic.
+    So use `repe' instead.  */
+
+ #define ASM_OUTPUT_OPCODE(STREAM, PTR)	\
+ {									\
+   if ((PTR)[0] == 'r'							\
+       && (PTR)[1] == 'e'						\
+       && (PTR)[2] == 'p')						\
+     {									\
+       if ((PTR)[3] == 'z')						\
+ 	{								\
+ 	  fprintf (STREAM, "repe");					\
+ 	  (PTR) += 4;							\
+ 	}								\
+       else if ((PTR)[3] == 'n' && (PTR)[4] == 'z')			\
+ 	{								\
+ 	  fprintf (STREAM, "repne");					\
+ 	  (PTR) += 5;							\
+ 	}								\
+     }									\
+ }
+
+ /* Define macro used to output shift-double opcodes when the shift
+    count is in %cl.  Some assemblers require %cl as an argument;
+    some don't.
+
+    GAS requires the %cl argument, so override unx386.h. */
+
+ #undef AS3_SHIFT_DOUBLE
+ #define AS3_SHIFT_DOUBLE(a,b,c,d) AS3 (a,b,c,d)
+
+ /* Print opcodes the way that GAS expects them. */
+ #define GAS_MNEMONICS 1
+
+ /* File specs */
+
+ #undef MD_STARTFILE_PREFIX
+ #define MD_STARTFILE_PREFIX "/lib/386/"
+
+ #undef STARTFILE_SPEC
+ #define STARTFILE_SPEC  \
+   "Sseg.o%s %{pg:Sgcrt0.o%s}%{!pg:%{p:Smcrt0.o%s}%{!p:Scrt0.o%s}}"
+
+ #undef LIB_SPEC
+ #define LIB_SPEC "Slibcfp.a%s Slibc.a%s"
+
+ /* -v is appropriate for use with GAS */
+
+ #define ASM_SPEC	"%{v} %{g}"
+
+ #define LINK_SPEC "-i %{g}"
+
+ /* Specify predefined symbols in preprocessor.  */
+
+ #undef CPP_PREDEFINES
+ #define CPP_PREDEFINES "-Dunix \
+ -DM_I86 -DM_I86SM -DM_SDATA -DM_STEXT -DM_I386 -DM_XENIX -DM_BITFIELDS \
+ -Di386 -DM_XOUT -DM_SYS5 -DM_SYSV -DM_SYS3 -DM_SYSIII \
+ -DM_WORDSWAP"
+
+ /* This spec is used for telling cpp whether char is signed or not.  */
+
+ #undef SIGNED_CHAR_SPEC
+ #if DEFAULT_SIGNED_CHAR
+ #define SIGNED_CHAR_SPEC \
+  "%{funsigned-char:-D__CHAR_UNSIGNED__ -D_CHAR_UNSIGNED}"
+ #else
+ #define SIGNED_CHAR_SPEC \
+  "%{!fsigned-char:-D__CHAR_UNSIGNED__ -D_CHAR_UNSIGNED}"
+ #endif
+
+ #undef LOCAL_INCLUDE_DIR
+ #define LOCAL_INCLUDE_DIR "/usr/local/lib/gcc-include"
+
+ /* caller has to pop the extra argument passed to functions that return
+    structures. */
+
+ #undef RETURN_POPS_ARGS
+ #define RETURN_POPS_ARGS(FUNTYPE,SIZE)   \
+   (TREE_CODE (FUNTYPE) == IDENTIFIER_NODE ? 0			\
+    : (TARGET_RTD						\
+       && (TYPE_ARG_TYPES (FUNTYPE) == 0				\
+ 	  || (TREE_VALUE (tree_last (TYPE_ARG_TYPES (FUNTYPE)))	\
+ 	      == void_type_node))) ? (SIZE)			\
+    : 0)
+ /* On other 386 systems, the last line looks like this:
+    : (aggregate_value_p (FUNTYPE)) ? GET_MODE_SIZE (Pmode) : 0)  */
+
+
+ /* Specify the size_t type.  */
+ #define SIZE_TYPE "unsigned int"
+
+ #undef DO_GLOBAL_CTORS_BODY
+ #define DO_GLOBAL_CTORS_BODY
+ /*
+ #define DO_GLOBAL_CTORS_BODY {int nptrs = *(int *)__CTOR_LIST__; int i; \
+   if (nptrs == -1 || (__CTOR_LIST__[0] == 0 && __CTOR_LIST__[1] != 0))  \
+     for (nptrs = 0; __CTOR_LIST__[nptrs + 1] != 0; nptrs++); 		\
+   for (i = nptrs; i >= 1; i--)						\
+     __CTOR_LIST__[i] (); }
+ */
+
+ #undef DO_GLOBAL_DTORS_BODY
+ #define DO_GLOBAL_DTORS_BODY
+ /*
+ #define DO_GLOBAL_DTORS_BODY {int nptrs = *(int *)__DTOR_LIST__; int i; \
+   if (nptrs == -1 || (__DTOR_LIST__[0] == 0 && __DTOR_LIST__[1] != 0))  \
+     for (nptrs = 0; __DTOR_LIST__[nptrs + 1] != 0; nptrs++); 		\
+   for (i = nptrs; i >= 1; i--)						\
+     __DTOR_LIST__[i] (); }
+ */
*** /dev/null	Fri Jan 22 10:51:04 1993
--- config/i386/t-xenix	Wed Dec 29 14:00:00 1993
***************
*** 0 ****
--- 1,8 ----
+ # a new version of __main
+
+ LIB1FUNCS_EXTRA= _fixdfsi.asm
+ LIB2FUNCS_EXTRA= __main.c
+ EXTRA_PROGRAMS=  real-ld
+
+ real-ld:	xenixld.c
+ 	$(CC) -o real-ld $(ALL_CFLAGS) $(ALL_CPPFLAGS) $(INCLUDES) $<
*** /dev/null	Fri Jan 22 10:51:04 1993
--- xenixld.c	Wed Dec 29 14:00:00 1993
***************
*** 0 ****
--- 1,264 ----
+ static char rcsid[] = "@(#) $Id: xenixld.c,v 1.2 1991/08/22 20:17:03 ronald Exp $\n";
+ /*
+  * This is the version distributed by RoboBar limited, currently maintained
+  * by Ronald Khoo <ronald@ibmpcug.co.uk>
+  *
+  * $Log: xenixld.c,v $
+  * Revision 1.2  1991/08/22  20:17:03  ronald
+  * Baseline for release with GCC 1.40
+  * Various mods by Steve, and a hack to prevent loading of COFF files.
+  *
+  */
+ /* Linker driver program for Xenix that can handle gcc command lines
+    Copyright (C) 1990 Christoph Badura
+
+    Comments and buggestions are welcome. Write to bad@flatlin.sub.org.
+
+ This file is not part of GNU CC.
+
+ This program 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 1, or (at your option)
+ any later version.
+
+ This program 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, 675 Mass Ave, Cambridge, MA 02139, USA.
+
+ */
+
+ #include <stdio.h>
+
+ #include "config.h"
+
+ #ifdef USG
+ #define R_OK 4
+ #define W_OK 2
+ #define X_OK 1
+ #define vfork fork
+ #endif /* USG */
+
+ extern void free ();
+
+ /* Default prefixes to attach to command names.  */
+
+ #ifndef STANDARD_STARTFILE_PREFIX
+ #define STANDARD_STARTFILE_PREFIX "/usr/local/lib/"
+ #endif /* !defined STANDARD_STARTFILE_PREFIX */
+
+ char *standard_startfile_prefix = STANDARD_STARTFILE_PREFIX;
+ char *standard_startfile_prefix_1 = "/lib/386/";
+ char *standard_startfile_prefix_2 = "/usr/lib/";
+
+ char * progname;		/* who am i */
+
+ fatal (char *msg)
+ {
+     fprintf (stderr, "%s:%s\n", progname, msg);
+     exit (1);
+ }
+
+ xmalloc (size)
+      int size;
+ {
+   register int value = malloc (size);
+   if (!value)
+     fatal ("Virtual memory full.");
+   return value;
+ }
+
+ xrealloc (void *ptr, int size)
+ {
+   register int value = realloc (ptr, size);
+   if (!value)
+     fatal ("Virtual memory full.");
+   return value;
+ }
+
+ struct lib_path {
+     struct lib_path *next;
+     int	length;			/* length of following string */
+     char *path;
+ };
+
+ struct lib_path *lib_path;	/* the library search path */
+
+ struct lib_path *
+ add_path (char *name, struct lib_path *prev)
+ {
+     int size;
+     struct lib_path *lp;
+
+ #ifdef DEBUG
+     fprintf (stderr, "%s: adding %s to library path\n", progname, name);
+ #endif
+     lp = (struct lib_path *) xmalloc (sizeof (struct lib_path));
+     lp->next = prev;
+     lp->length = strlen (name);
+     lp->path = name;
+     return lp;
+ }
+
+ /*
+  * Added by Ronald.Khoo@ibmpcug.co.uk:
+  * SCO systems have two kinds of libraries, OMF and COFF.  XENIX GCC/G++
+  * only works with OMF, this hack prevents the program accidentally finding
+  * COFF libraries earlier in the search path from the corresponding OMF one.
+  */
+ int
+ islib(char *name)
+ {
+ 	int i;
+ 	FILE *fp = fopen(name, "r");
+ 	if (fp == 0)
+ 		return 0;
+ 	i = getw(fp);
+ 	fclose(fp);
+ 	return (i & 0xff) == 0x80 /* OMF */ || (i & 0xffff) == 0xff65 /* ar */;
+ }
+
+ char *
+ find_library_1 (char *name)
+ {
+     struct lib_path *lp;
+     int name_size, size = 0;
+     char *temp_name = 0;
+     int win = 0;
+
+     name_size = strlen (name) + 1;
+     for (lp=lib_path; lp && !win; lp=lp->next) {
+ 	if ((lp->length + name_size + 1) > size) {
+ 	    size = lp->length + name_size + 1;
+ 	    if (temp_name)
+ 		free (temp_name);
+ 	    temp_name = 0;
+ 	}
+ 	if (!temp_name)
+ 	    temp_name = (char *)xmalloc (size);
+ 	strcpy (temp_name, lp->path);
+ 	if (temp_name[lp->length - 1] != '/')
+ 	    strcat (temp_name, "/");
+ 	strcat (temp_name, name);
+ 	win = islib(temp_name);
+ #ifdef DEBUG
+ 	fprintf (stderr, "%s: searching %s -> %d\n", progname, temp_name, win);
+ #endif
+     }
+     if (win)
+ 	return temp_name;
+     else {
+ 	free (temp_name);
+ 	return name;
+     }
+ }
+
+ char *
+ find_library (char *name)
+ {
+     char *temp_name;
+     char *lib_name;
+
+     temp_name = (char *)xmalloc (strlen (name) + 7); /* 6 chars for "Slib" and ".a" */
+     strcpy (temp_name, "lib");
+     strcat (temp_name, name);
+     strcat (temp_name, ".a");
+     if ((lib_name = find_library_1 (temp_name)) == temp_name) {
+ 	strcpy (temp_name, "Slib"); /* system libraries start with "Slib" */
+ 	strcat (temp_name, name);
+ 	strcat (temp_name, ".a");
+ 	lib_name = find_library_1 (temp_name);
+     }
+     free (temp_name);
+ #ifdef DEBUG
+     fprintf (stderr, "%s: library name is %s\n", progname, lib_name);
+     fprintf (stderr, "%s: returning %s\n", progname,
+ 	     (lib_name == temp_name) ? name : lib_name);
+ #endif
+     return (lib_name == temp_name) ? name : lib_name;
+ }
+
+
+ char **argbuf;			/* this holds the argument vector for ld */
+ int argbuf_index, argbuf_length;
+
+ /* Add one argument to the vector at the end. */
+
+ void
+ store_arg (char *arg)
+ {
+   if (argbuf_index + 1 == argbuf_length)
+     {
+       argbuf = (char **) xrealloc (argbuf, (argbuf_length*=2)*sizeof (char *));
+     }
+
+   argbuf[argbuf_index++] = arg;
+   argbuf[argbuf_index] = 0;
+ }
+
+ /*
+  * The standard Xenix ld is seriously braindamaged. It does not understand
+  * -llib options.  So we expand them here and furthermore we process -Lpath
+  * options as used by the GNU tools.
+  */
+
+ int
+ main (int argc, char **argv)
+ {
+     int size;
+     char *lib_name;
+ #ifdef DEBUG
+     char **argp;
+ #endif
+
+     progname = *argv;
+
+     argbuf_length = 10;
+     argbuf_index = 0;
+     argbuf = (char **) xmalloc (argbuf_length * sizeof (char *));
+
+     /* push default library search paths on lib_stack */
+     lib_path = add_path (standard_startfile_prefix_2, (struct lib_path *)0);
+     lib_path = add_path (standard_startfile_prefix_1, lib_path);
+     lib_path = add_path (standard_startfile_prefix, lib_path);
+
+     /*
+      * Copy argv to argbuf processing -L switches and
+      * resolving library names. Preserve the order of the arguments.
+      */
+     store_arg ("ld"); /* provide argv[0] for ld */
+     for (++argv; --argc > 0; ++argv) {
+ 	if ((*argv)[0] == '-')
+ 	    switch ((*argv)[1]) {
+ 	    case 'L':
+ 		lib_path = add_path ((*argv)+2, lib_path);
+ 		break;
+ 	    case 'l':
+ 		lib_name = find_library ((*argv)+2);
+ #ifdef DEBUG
+ 		fprintf (stderr, "%s: found library %s\n", progname, lib_name);
+ #endif
+ 		store_arg (lib_name);
+ 		break;
+ 	    default:
+ 		store_arg (*argv);
+ 	    }
+ 	else
+ 	    /* just an input file */
+ 	    store_arg (*argv);
+     }
+ #ifdef DEBUG
+     fprintf (stderr, "%s: linker call: \"", progname);
+     for (argp=argbuf; *argp; argp++)
+ 	fprintf (stderr, "%s ", *argp);
+     putc ('\n', stderr);
+ #endif
+     execv ("/bin/ld", argbuf);
+     /* maybe ld is not ld */
+     fprintf (stderr, "%s: unable to run /bin/ld", progname);
+     exit (1);
+ }
*** /dev/null	Fri Jan 22 10:51:04 1993
--- config/i386/xm-xenix.h	Wed Dec 29 14:00:00 1993
***************
*** 0 ****
--- 1,22 ----
+ /* Configuration for GCC for Intel i386 running SCO Xenix.  */
+
+ #include "i386/xm-sysv3.h"
+
+ /* On SCO 3.2.1, ldexp rejects values outside [0.5, 1). */
+
+ #define BROKEN_LDEXP
+
+ /* Big buffers improve performance.  */
+
+ #define IO_BUFFER_SIZE (0x8000 - 1024)
+
+ #ifndef __GNUC__
+ /* The SCO compiler gets it wrong, and treats enumerated bitfields
+    as signed quantities, making it impossible to use an 8-bit enum
+    for compiling GNU C++.  */
+ #define ONLY_INT_FIELDS 1
+ #define CODE_FIELD_BUG 1
+ #endif
+
+ #define OBJECT_FORMAT_XOUT
+ #define NO_SYS_SIGLIST
*** getpwd.c.old	Tue Sep 21 21:35:41 1993
--- getpwd.c	Wed Dec 29 14:00:00 1993
***************
*** 4,9 ****
--- 4,10 ----

  #include <errno.h>
  #include <sys/types.h>
+ #include <stddef.h>
  #include <sys/stat.h>

  #ifndef errno
*** configure.old	Fri Nov 19 21:44:34 1993
--- configure	Wed Dec 29 14:00:00 1993
***************
*** 428,435 ****
--- 428,444 ----
  			tm_file=i386/sco.h
  			tmake_file=i386/t-sco
  		fi
  		truncate_target=yes
  		;;
+ 	i[34]86-*-xenix*)		 # 80386 running SCO Xenix
+ 		cpu_type=i386
+ 		xm_file=i386/xm-xenix.h
+ 		tm_file=i386/xenix.h
+ 		xmake_file=i386/x-xenix
+ 		tmake_file=i386/t-xenix
+ 		broken_install=yes
+ 		use_collect2=yes
+ 		;;
  	i[34]86-*-isc*)			# 80386 running ISC system
  		cpu_type=i386
  		xm_file=i386/xm-isc.h
*** collect2.c.old	Wed Oct 20 23:12:32 1993
--- collect2.c	Wed Dec 29 14:00:00 1993
***************
*** 107,112 ****
     In a cross-compiler, this means you need a cross nm,
     but that isn't quite as unpleasant as special headers.  */

! #if !defined (OBJECT_FORMAT_COFF) && !defined (OBJECT_FORMAT_ROSE)
  #define OBJECT_FORMAT_NONE
  #endif

--- 107,112 ----
     In a cross-compiler, this means you need a cross nm,
     but that isn't quite as unpleasant as special headers.  */

! #if !defined (OBJECT_FORMAT_COFF) && !defined (OBJECT_FORMAT_ROSE) && !defined(OBJECT_FORMAT_XOUT)
  #define OBJECT_FORMAT_NONE
  #endif

*** collect2.c.old	Wed Oct 20 23:12:32 1993
--- collect2.c	Wed Dec 29 14:00:00 1993
***************
*** 2360,2362 ****
--- 2360,2467 ----
  }

  #endif /* OBJECT_FORMAT_ROSE */
+
+ #ifdef OBJECT_FORMAT_XOUT
+
+ #include <sys/relsym.h>
+ #include <a.out.h>
+
+ #define IGNORE_ATTR (-1)
+
+ struct xseg *seg_table;
+ long num_seg_table_entries;
+
+ static void process_symbol_table(fp, segsize, name)
+ FILE *fp;
+ int segsize;
+ char *name;
+ {
+   char *symdata, *p;
+   long i;
+   struct sym symb;
+
+   /* grab the symbol table */
+
+   symdata = alloca(segsize + 1);
+   if (fread(symdata, segsize, 1, fp) != 1)
+     fatal_perror("fread %s", name);
+
+   p = symdata;
+   while (p < symdata + segsize)
+   {
+     int len;
+
+     symb = *((struct sym *)p);
+     p += sizeof(struct sym);
+ 	
+     if ((symb.s_type & S_TYPE) == S_TEXT)
+     {
+       switch (is_ctor_dtor (p))
+       {
+         case 1:
+           add_to_list (&constructors, p);
+           break;
+
+         case 2:
+           add_to_list (&destructors, p);
+           break;
+       }
+     }
+     p += strlen(p) + 1;
+   }
+ }
+
+ static read_seg_table(fp, pos, size, name)
+ FILE *fp;
+ long pos, size;
+ {
+   seg_table = (struct xseg *) xmalloc(size);
+   fseek(fp, pos, 0);
+   if (fread((char *)seg_table, size, 1, fp) != 1)
+     fatal_perror("collect cannot read seg table");
+   num_seg_table_entries = size / sizeof (struct xseg);
+ }
+
+ struct xseg *find_segment(type, attr)
+ int type, attr;
+ {
+   struct xseg *cseg;
+
+   for (cseg = seg_table; cseg < seg_table + num_seg_table_entries; ++cseg)
+   if (cseg->xs_type == type &&
+     (attr == IGNORE_ATTR || attr == cseg->xs_attr))
+     return cseg;
+   return NULL;
+ }
+
+ static void
+ scan_prog_file (prog_name, which_pass)
+      char *prog_name;
+      enum pass which_pass;
+ {
+   struct xexec exec_aouthdr;
+   struct xext *xext;
+   struct xseg *cseg;
+   FILE *fp;
+
+   if (which_pass != PASS_FIRST) return;
+
+   if ((fp = fopen(prog_name, "r")) == NULL)
+     fatal_perror("fopen %s", prog_name);
+
+   if (fread((char *)&exec_aouthdr, sizeof(struct xexec), 1, fp) != 1)
+     fatal_perror("fread %s", prog_name);
+
+   xext = (struct xext *) alloca(exec_aouthdr.x_ext);
+   if (fread((char *)xext, exec_aouthdr.x_ext, 1, fp) != 1)
+     fatal_perror("fread %s", prog_name);
+
+   read_seg_table(fp, xext->xe_segpos, xext->xe_segsize, prog_name);
+
+   if (cseg = find_segment(XS_TSYMS, 1))
+   {
+     fseek(fp, cseg->xs_filpos, 0);
+     process_symbol_table(fp, cseg->xs_psize, prog_name);
+   }
+ }
+ #endif /* OBJECT_FORMAT_XOUT */
*** /dev/null		Tue Jul 28 04:02:25 1992
--- config/i386/x-xenix	Wed Dec 29 14:00:00 1993
***************
*** 0 ****
--- 1,9 ----
+ CC = gcc
+ OLDCC = gcc
+ CFLAGS = -O
+ INSTALL = cp
+ SYMLINK = ln
+ RANLIB = ranlib
+ RANLIB_TEST = true
+ SYSTEM_HEADER_DIR = /usr/local/lib/gcc-include
+ CLIB = -lx
--- xenpatch.257 --ends------------ Cut Here -------------ends--xenpatch.257---

The groundwork (with the gcc 2.3.3 patchkit) done by :
------------------------------------------------------------------
Steve.Bleazard@RoboBar.Co.Uk        | Phone:  +44 81 991 1142 x153
Snr Software Engineer, Robobar Ltd. | Fax:    +44 81 998 8343 (G3)
22 Wadsworth Road, Perivale.        |
Middx., UB6 7JD ENGLAND.            | ...!ibmpcug!robobar!steve

Don't sue him, these patches only SEEMS to work with gcc 2.5.7 too!

The necessary 2.5.7 cosmetics done by :
------------------------------------------------------------------
Kai Ruottu, MScTech                 | Phone:  +358 698 441265
Xenix/Unix support                  |
Parasniementie 2 B 7                |
SF-95450 Tornio, FINLAND            |
