rocklinux/package/rene/emacs/arch-powerpc-ptr-hack.patch-disabled

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See the comments prior to each patch piece.  Primarily, the load address was
changed in gcc-2.95 for PowerPC Linux, which broke Emacs's pointer handling.
The two important patches to fix that problem are DATA_SEG_BITS and
EXPLICIT_SIGN_EXTEND.  Most of these patches originated with the RedHat and
LinuxPPC distributions.  This file patches the headers for the Macintosh and
IBM RS-6000 machines.

    -- goo (goo@radek.org)

*** src/m/macppc.h.old	Wed Nov 29 16:39:18 2000
--- src/m/macppc.h	Wed Nov 29 17:08:08 2000
***************
*** 1,4 ****
! /* machine description file For the powerpc Macintosh.
     Copyright (C) 1994 Free Software Foundation, Inc.
  
  This file is part of GNU Emacs.
--- 1,4 ----
! /* machine description file for the PowerPC Macintosh.
     Copyright (C) 1994 Free Software Foundation, Inc.
  
  This file is part of GNU Emacs.
***************
*** 28,33 ****
--- 28,44 ----
  
  #define NO_ARG_ARRAY
  
+ #if defined(__linux__) && (__GNUC__ - 0 == 2) && (__GNUC_MINOR__ >= 95)
+ /* gcc-2.95 on Linux/PPC changed the load address to 0x10000000 */
+ #  define DATA_SEG_BITS  0x10000000
+ #endif
+ 
+ /* Say this machine is a PowerPC Reference Platform */
+ 
+ #ifndef prep
+ #  define prep
+ #endif
+ 
  /* Define WORD_MACHINE if addresses and such have
   * to be corrected before they can be used as byte counts.  */
  
***************
*** 38,48 ****
--- 49,66 ----
     Ones defined so far include vax, m68000, ns16000, pyramid,
     orion, tahoe, APOLLO and many others */
  
+ /* This level of optimization is reported to work.  */
+ #define C_OPTIMIZE_SWITCH -O2
+ 
  /* Use type EMACS_INT rather than a union, to represent Lisp_Object */
  /* This is desirable for most machines.  */
  
  #define NO_UNION_TYPE
  
+ /* XINT must explicitly sign-extend */
+ 
+ #define EXPLICIT_SIGN_EXTEND
+ 
  /* Data type of load average, as read out of kmem.  */
  
  #define LOAD_AVE_TYPE long
***************
*** 59,64 ****
--- 77,87 ----
     in the file alloca.s should be used.  */
  
  #define HAVE_ALLOCA
+ #ifndef NOT_C_CODE
+ #  if __GNUC__ < 2 /* Modern versions of GCC handle alloca directly.  */
+ #    include <alloca.h>
+ #  endif
+ #endif
  
  /* Some really obscure 4.2-based systems (like Sequent DYNIX)
   * do not support asynchronous I/O (using SIGIO) on sockets,
***************
*** 75,81 ****
  /* #define NO_SOCK_SIGIO */
  
  #if defined(__NetBSD__) || defined(__OpenBSD__)
! #define ORDINARY_LINK
  #endif
  
  #define UNEXEC unexelf.o
--- 98,104 ----
  /* #define NO_SOCK_SIGIO */
  
  #if defined(__NetBSD__) || defined(__OpenBSD__)
! #  define ORDINARY_LINK
  #endif
  
  #define UNEXEC unexelf.o
***************
*** 83,91 ****
  #define NO_TERMIO
  
  #if defined (LINUX) || defined (__NetBSD__) || defined (__OpenBSD__)
! # define TEXT_END ({ extern int _etext; &_etext; })
  #endif
  
  #if (defined (__NetBSD__) || defined (__OpenBSD__)) && defined (__ELF__)
! #define HAVE_TEXT_START
  #endif
--- 106,117 ----
  #define NO_TERMIO
  
  #if defined (LINUX) || defined (__NetBSD__) || defined (__OpenBSD__)
! #  define TEXT_END ({ extern int _etext; &_etext; })
  #endif
  
  #if (defined (__NetBSD__) || defined (__OpenBSD__)) && defined (__ELF__)
! #  define HAVE_TEXT_START
  #endif
+ 
+ /* Avoid .sbss, which causes undump to fail for some reason.  */
+ #define LD_SWITCH_MACHINE -G0
*** src/m/ibmrs6000.h.old	Wed Nov 29 16:49:59 2000
--- src/m/ibmrs6000.h	Wed Nov 29 16:58:40 2000
***************
*** 42,51 ****
  
  #define IBMR2AIX
  
! /* Use type int rather than a union, to represent Lisp_Object */
  /* This is desirable for most machines.	 */
  
  #define NO_UNION_TYPE
  
  /* Define CANNOT_DUMP on machines where unexec does not work.
     Then the function dump-emacs will not be defined
--- 42,59 ----
  
  #define IBMR2AIX
  
! /* This level of optimization is reported to work.  */
! #define C_OPTIMIZE_SWITCH -O2
! 
! /* Use type EMACS_INT rather than a union, to represent Lisp_Object */
  /* This is desirable for most machines.	 */
  
  #define NO_UNION_TYPE
+   
+ /* XINT must explicitly sign-extend */
+ 
+ #define EXPLICIT_SIGN_EXTEND
+ 
  
  /* Define CANNOT_DUMP on machines where unexec does not work.
     Then the function dump-emacs will not be defined
***************
*** 74,82 ****
     we always lose the high bits.  We must tell XPNTR to add them back.	*/
  
  #ifndef USG5_4
! #define DATA_SEG_BITS 0x20000000
  #else
! #define DATA_SEG_BITS 0
  #endif
  
  #ifdef CANNOT_DUMP
--- 82,100 ----
     we always lose the high bits.  We must tell XPNTR to add them back.	*/
  
  #ifndef USG5_4
! #  define DATA_SEG_BITS 0x20000000
  #else
! #  if defined(__linux__) && (__GNUC__ - 0 == 2) && (__GNUC_MINOR__ >= 95)
!    /* gcc-2.95 on Linux/PPC changed the load address to 0x10000000 */
! #    define DATA_SEG_BITS  0x10000000
! #  else
! #    define DATA_SEG_BITS 0
! #  endif  /* newer gcc */
! #endif
! 
! /* Say this machine is a PowerPC Reference Platform */
! #ifndef prep
! #  define prep
  #endif
  
  #ifdef CANNOT_DUMP