1 /* Machine description file for Acorn RISCiX machines.
2 Copyright (C) 1994 Free Software Foundation, Inc.
4 This file is part of GNU Emacs.
6 GNU Emacs is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2, or (at your option)
11 GNU Emacs is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with XEmacs; see the file COPYING. If not, write to
18 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
19 Boston, MA 02111-1307, USA. */
21 /* Synched up with: FSF 19.31. */
23 /* Now define a symbol for the cpu type, if your compiler
24 does not define it automatically:
25 Ones defined so far include vax, m68000, ns16000, pyramid,
26 orion, tahoe, APOLLO and many others */
28 /* ARM note - this is done by the Norcroft compiler - symbol is `__arm' */
34 #define LDAV_SYMBOL "_iavenrun"
37 /* Data type of load average, as read out of kmem. */
39 #define LOAD_AVE_TYPE long
41 /* Convert that into an integer that is 100 for a load average of 1.0 */
44 * Scale factor for scaled integers used to count
45 * %cpu time and load averages.
48 /* FSHIFT and FSCALE are defined in param.h, but are required by
49 LOAD_AVE_CVT, so they need to be defined here. */
52 #define FSHIFT 8 /* bits to right of fixed binary point */
56 #define FSCALE (1<<FSHIFT)
59 #define LOAD_AVE_CVT(x) (int) (((double) (x)) * 100.0 / FSCALE)
61 /* Define CANNOT_DUMP on machines where unexec does not work.
62 Then the function dump-emacs will not be defined
63 and temacs will do (load "loadup") automatically unless told otherwise. */
67 /* This prevents Emacs dumping an unsqueezed binary with the
68 SQUEEZE bit set in the magic number. */
70 #define ADJUST_EXEC_HEADER {hdr.a_magic &= ~MF_SQUEEZED;}
72 /* Define C_ALLOCA if this machine does not support a true alloca
73 and the one written in C should be used instead.
74 Define HAVE_ALLOCA to say that the system provides a properly
75 working alloca function and it should be used.
76 Define neither one if an assembler-language alloca
77 in the file alloca.s should be used. */
81 /* Use builtin alloca. Also be sure that no other ones are tried out. */
82 #define alloca __builtin_alloca
85 /* Keep gcc/RISCiX happy - it uses __gccmain where other versions of
86 gcc use __main, because of a library routine name clash. */
87 #define __main __gccmain
94 /* Define NO_REMAP if memory segmentation makes it not work well
95 to change the boundary between the text section and data section
96 when Emacs is dumped. If you define this, the preloaded Lisp
97 code will not be sharable; but that's better than failing completely. */
103 #define TEXT_START 0x8000
104 #define DATA_END &_edata
109 /* Avoid debugging library */
112 /* Avoid sharing libc */
113 #define LIB_STANDARD "-lc_n"
115 /* Avoid sharing libX11 */
116 #define LIB_X11_LIB "-lX11_n"
118 /* All kinds of symbol definitions, so as to avoid multiply defined symbol
119 errors from the RISCiX linker. */
122 #define C_DEBUG_SWITCH
124 #define C_OPTIMIZE_SWITCH "-O1 -fomit-frame-pointer -w -g -Dgetopt=gnu_getopt -Dopterr=gnu_opterr -Doptind=gnu_optind -Doptarg=gnu_optarg -Dcfree=gnu_cfree -D___type="
127 #define C_DEBUG_SWITCH "-O -w -g -Dgetopt=gnu_getopt -Dopterr=gnu_opterr -Doptind=gnu_optind -Doptarg=gnu_optarg -Dcfree=gnu_cfree"
130 /* Turn this on to avoid the emacs malloc and use standard one */
134 /* For the portable alloca */
135 #define STACK_DIRECTION -1
138 /* CRT0_O is defined in s/riscix1-1.h or s/riscix1-2.h, as appropriate. */
139 #define START_FILES "pre-crt0.o CRT0_O"