src/m/macppc.h

   1 /* machine description file For the powerpc Macintosh.
   2    Copyright (C) 1994, 2001, 2002, 2003, 2004, 2005, 2006, 2007,
   3                  2008  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 3 of the License, or
  10 (at your option) 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.  If not, see <http://www.gnu.org/licenses/>.  */
  19
  20 /* Define WORDS_BIG_ENDIAN if lowest-numbered byte in a word
  21    is the most significant byte.  */
  22
  23 #define WORDS_BIG_ENDIAN
  24
  25 /* Define NO_ARG_ARRAY if you cannot take the address of the first of a
  26  * group of arguments and treat it as an array of the arguments.  */
  27
  28 #define NO_ARG_ARRAY
  29
  30 /* Define WORD_MACHINE if addresses and such have
  31  * to be corrected before they can be used as byte counts.  */
  32
  33 /* #define WORD_MACHINE */
  34
  35 /* Now define a symbol for the cpu type, if your compiler
  36    does not define it automatically:
  37    Ones defined so far include vax, m68000, ns16000, pyramid,
  38    orion, tahoe, APOLLO and many others */
  39
  40 /* Use type EMACS_INT rather than a union, to represent Lisp_Object */
  41 /* This is desirable for most machines.  */
  42
  43 #define NO_UNION_TYPE
  44
  45 /* Data type of load average, as read out of kmem.  */
  46
  47 #define LOAD_AVE_TYPE long
  48
  49 /* Convert that into an integer that is 100 for a load average of 1.0  */
  50
  51 #define LOAD_AVE_CVT(x) (int) (((double) (x)) * 100.0 / FSCALE)
  52
  53 /* Some really obscure 4.2-based systems (like Sequent DYNIX)
  54  * do not support asynchronous I/O (using SIGIO) on sockets,
  55  * even though it works fine on tty's.  If you have one of
  56  * these systems, define the following, and then use it in
  57  * config.h (or elsewhere) to decide when (not) to use SIGIO.
  58  *
  59  * You'd think this would go in an operating-system description file,
  60  * but since it only occurs on some, but not all, BSD systems, the
  61  * reasonable place to select for it is in the machine description
  62  * file.
  63  */
  64
  65 /* #define NO_SOCK_SIGIO */
  66
  67 #define UNEXEC unexelf.o
  68
  69 #define NO_TERMIO
  70
  71 #if defined (LINUX) || defined (__NetBSD__) || defined (__OpenBSD__)
  72 # define TEXT_END ({ extern int _etext; &_etext; })
  73 #endif
  74
  75 #if (defined (__NetBSD__) || defined (__OpenBSD__)) && defined (__ELF__)
  76 #define HAVE_TEXT_START
  77 #endif
  78
  79 /* NAKAJI Hiroyuki <nakaji@tutrp.tut.ac.jp> says this is needed
  80    For MkLinux/LinuxPPC.  */
  81
  82 #ifdef LINUX
  83 #define LINKER $(CC) -nostdlib
  84 /* s/gnu-linux.h defines this to `-z nocombreloc' which does not work here
  85    because prefix-args is not used.  */
  86 #undef LD_SWITCH_SYSTEM_TEMACS
  87 #define LD_SWITCH_MACHINE_TEMACS -Xlinker -znocombreloc
  88 #ifdef _ARCH_PPC64
  89 #undef START_FILES
  90 #define START_FILES pre-crt0.o /usr/lib64/crt1.o /usr/lib64/crti.o
  91 #undef LIB_STANDARD
  92 #define LIB_STANDARD -lgcc -lc -lgcc /usr/lib64/crtn.o
  93 #endif
  94 #endif
  95
  96 #if 0  /* This breaks things on PPC GNU/Linux ecept for Yellowdog,
  97           even with identical GCC, as, ld.  Let's take it out until we
  98           know what's really going on here.  */
  99 /* GCC 2.95 and newer on GNU/Linux PPC changed the load address to
 100    0x10000000.  */
 101 #if defined __linux__
 102 #if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 95)
 103 #define DATA_SEG_BITS  0x10000000
 104 #endif
 105 #endif
 106 #endif /* 0 */
 107
 108 #ifdef _ARCH_PPC64
 109 #ifndef _LP64
 110 #define _LP64
 111 #endif
 112 #endif
 113
 114 /* arch-tag: 41913e4e-e7d1-4023-aadb-210cc31712ed
 115    (do not change this comment) */