src/m/macppc.h

   1 /* machine description file For the powerpc Macintosh.
   2    Copyright (C) 1994, 2001, 2002, 2003, 2004,
   3                  2005 Free Software Foundation, Inc.
   4
   5 This file is part of GNU Emacs.
   6
   7 GNU Emacs is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 1, or (at your option)
  10 any later version.
  11
  12 GNU Emacs is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GNU Emacs; see the file COPYING.  If not, write to
  19 the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  20 Boston, MA 02110-1301, USA.  */
  21
  22 /* Define WORDS_BIG_ENDIAN iff lowest-numbered byte in a word
  23    is the most significant byte.  */
  24
  25 #define WORDS_BIG_ENDIAN
  26
  27 /* Define NO_ARG_ARRAY if you cannot take the address of the first of a
  28  * group of arguments and treat it as an array of the arguments.  */
  29
  30 #define NO_ARG_ARRAY
  31
  32 /* Define WORD_MACHINE if addresses and such have
  33  * to be corrected before they can be used as byte counts.  */
  34
  35 /* #define WORD_MACHINE */
  36
  37 /* Now define a symbol for the cpu type, if your compiler
  38    does not define it automatically:
  39    Ones defined so far include vax, m68000, ns16000, pyramid,
  40    orion, tahoe, APOLLO and many others */
  41
  42 /* Use type EMACS_INT rather than a union, to represent Lisp_Object */
  43 /* This is desirable for most machines.  */
  44
  45 #define NO_UNION_TYPE
  46
  47 /* Data type of load average, as read out of kmem.  */
  48
  49 #define LOAD_AVE_TYPE long
  50
  51 /* Convert that into an integer that is 100 for a load average of 1.0  */
  52
  53 #define LOAD_AVE_CVT(x) (int) (((double) (x)) * 100.0 / FSCALE)
  54
  55 /* Some really obscure 4.2-based systems (like Sequent DYNIX)
  56  * do not support asynchronous I/O (using SIGIO) on sockets,
  57  * even though it works fine on tty's.  If you have one of
  58  * these systems, define the following, and then use it in
  59  * config.h (or elsewhere) to decide when (not) to use SIGIO.
  60  *
  61  * You'd think this would go in an operating-system description file,
  62  * but since it only occurs on some, but not all, BSD systems, the
  63  * reasonable place to select for it is in the machine description
  64  * file.
  65  */
  66
  67 /* #define NO_SOCK_SIGIO */
  68
  69 #if defined(__OpenBSD__)
  70 #define ORDINARY_LINK
  71 #endif
  72
  73 #define UNEXEC unexelf.o
  74
  75 #define NO_TERMIO
  76
  77 #if defined (LINUX) || defined (__NetBSD__) || defined (__OpenBSD__)
  78 # define TEXT_END ({ extern int _etext; &_etext; })
  79 #endif
  80
  81 #if (defined (__NetBSD__) || defined (__OpenBSD__)) && defined (__ELF__)
  82 #define HAVE_TEXT_START
  83 #endif
  84
  85 /* NAKAJI Hiroyuki <nakaji@tutrp.tut.ac.jp> says this is needed
  86    For MkLinux/LinuxPPC.  */
  87
  88 #ifdef LINUX
  89 #define LINKER $(CC) -nostdlib
  90 /* s/gnu-linux.h defines this to `-z nocombreloc' which does not work here
  91    because prefix-args is not used.  */
  92 #undef LD_SWITCH_SYSTEM_TEMACS
  93 #define LD_SWITCH_MACHINE_TEMACS -Xlinker -znocombreloc
  94 #ifdef _ARCH_PPC64
  95 #undef START_FILES
  96 #define START_FILES pre-crt0.o /usr/lib64/crt1.o /usr/lib64/crti.o
  97 #undef LIB_STANDARD
  98 #define LIB_STANDARD -lgcc -lc -lgcc /usr/lib64/crtn.o
  99 #endif
 100 #endif
 101
 102 #if 0  /* This breaks things on PPC GNU/Linux ecept for Yellowdog,
 103           even with identical GCC, as, ld.  Let's take it out until we
 104           know what's really going on here.  */
 105 /* GCC 2.95 and newer on GNU/Linux PPC changed the load address to
 106    0x10000000.  */
 107 #if defined __linux__
 108 #if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 95)
 109 #define DATA_SEG_BITS  0x10000000
 110 #endif
 111 #endif
 112 #endif /* 0 */
 113
 114 #ifdef _ARCH_PPC64
 115 #ifndef _LP64
 116 #define _LP64
 117 #endif
 118 #endif
 119
 120 /* arch-tag: 41913e4e-e7d1-4023-aadb-210cc31712ed
 121    (do not change this comment) */