1 /* Target definitions for GNU compiler for Intel 80x86 running DG/ux
2 Copyright (C) 1993, 1995, 1996, 1997, 1998 Free Software Foundation, Inc.
3 Currently maintained by gcc@dg-rtp.dg.com.
5 This file is part of GNU CC.
7 GNU CC 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 2, or (at your option)
12 GNU CC 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.
17 You should have received a copy of the GNU General Public License
18 along with GNU CC; see the file COPYING. If not, write to
19 the Free Software Foundation, 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
22 /* for now, we are just like the sysv4 version with a
26 #include "i386/sysv4.h"
29 #define VERSION_INFO2 "$Revision: 1.6 $"
32 #ifndef VERSION_STRING
33 #define VERSION_STRING version_string
36 /* Identify the compiler. */
37 /* TARGET_VERSION used by toplev.c VERSION_STRING used by -midentify-revision */
40 #define TARGET_VERSION fprintf (stderr, " (%s%s, %s)", \
41 VERSION_INFO1, VERSION_INFO2, __DATE__)
43 #define VERSION_INFO1 "ix86 DG/ux, "
45 /* Augment TARGET_SWITCHES with the MXDB options. */
46 #define MASK_STANDARD 0x40000000 /* Retain standard information */
47 #define MASK_NOLEGEND 0x20000000 /* Discard legend information */
48 #define MASK_EXTERNAL_LEGEND 0x10000000 /* Make external legends */
49 #define MASK_IDENTIFY_REVISION 0x08000000 /* Emit 'ident' to .s */
50 #define MASK_WARN_PASS_STRUCT 0x04000000 /* Warn when structures are passed */
52 #define TARGET_STANDARD (target_flags & MASK_STANDARD)
53 #define TARGET_NOLEGEND (target_flags & MASK_NOLEGEND)
54 #define TARGET_EXTERNAL_LEGEND (target_flags & MASK_EXTERNAL_LEGEND)
55 #define TARGET_IDENTIFY_REVISION (target_flags & MASK_IDENTIFY_REVISION)
56 #define TARGET_WARN_PASS_STRUCT (target_flags & MASK_WARN_PASS_STRUCT)
58 #undef SUBTARGET_SWITCHES
59 #define SUBTARGET_SWITCHES \
60 { "standard", MASK_STANDARD, "Retain standard MXDB information" }, \
61 { "legend", -MASK_NOLEGEND, "Retain legend information" }, \
62 { "no-legend", MASK_NOLEGEND, "" }, \
63 { "external-legend", MASK_EXTERNAL_LEGEND, "Generate external legend information" }, \
64 { "identify-revision", MASK_IDENTIFY_REVISION, "Emit identifying info in .s file" }, \
65 { "warn-passed-structs", MASK_WARN_PASS_STRUCT, "Warn when a function arg is a structure" },
67 #undef DWARF_DEBUGGING_INFO
68 #define DWARF_DEBUGGING_INFO
71 allow -gstabs so that those who have gnu-as installed
72 can debug c++ programs.
74 #undef DBX_DEBUGGING_INFO
75 #define DBX_DEBUGGING_INFO
77 #define PREFERRED_DEBUGGING_TYPE DWARF_DEBUG
79 /* Override svr[34].h. */
81 #define ASM_FILE_START(FILE) \
82 output_file_start (FILE, f_options, sizeof f_options / sizeof f_options[0], \
83 W_options, sizeof W_options / sizeof W_options[0])
85 /* ix86 abi specified type for wchar_t */
88 #define WCHAR_TYPE "long int"
90 #undef WCHAR_TYPE_SIZE
91 #define WCHAR_TYPE_SIZE BITS_PER_WORD
94 /* Some machines may desire to change what optimizations are performed for
95 various optimization levels. This macro, if defined, is executed once
96 just after the optimization level is determined and before the remainder
97 of the command options have been parsed. Values set in this macro are
98 used as the default values for the other command line options.
100 LEVEL is the optimization level specified; 2 if -O2 is specified,
101 1 if -O is specified, and 0 if neither is specified. */
103 /* This macro used to store 0 in flag_signed_bitfields.
104 Not only is that misuse of this macro; the whole idea is wrong.
106 The GNU C dialect makes bitfields signed by default,
107 regardless of machine type. Making any machine inconsistent in this
108 regard is bad for portability.
110 I chose to make bitfields signed by default because this is consistent
111 with the way ordinary variables are handled: `int' equals `signed int'.
112 If there is a good reason to prefer making bitfields unsigned by default,
113 it cannot have anything to do with the choice of machine.
114 If the reason is good enough, we should change the convention for all machines.
116 -- rms, 20 July 1991. */
119 this really should go into dgux-local.h
122 #undef OPTIMIZATION_OPTIONS
123 #define OPTIMIZATION_OPTIONS(LEVEL,SIZE) \
125 extern int flag_signed_bitfields; \
126 flag_signed_bitfields = 0; \
127 optimization_options (LEVEL,SIZE); \
131 /* The normal location of the `ld' and `as' programs */
133 #undef MD_EXEC_PREFIX
134 #define MD_EXEC_PREFIX "/usr/bin/"
136 /* The normal location of the various *crt*.o files is the */
138 #undef MD_STARTFILE_PREFIX
139 #define MD_STARTFILE_PREFIX "/usr/lib/"
141 /* Macros to be automatically defined.
142 __CLASSIFY_TYPE__ is used in the <varargs.h> and <stdarg.h> header
143 files with DG/UX revision 5.40 and later. This allows GNU CC to
144 operate without installing the header files. */
146 #undef CPP_PREDEFINES
147 #define CPP_PREDEFINES "-Di386 -D__ix86 -Dunix -DDGUX -D__CLASSIFY_TYPE__=2\
148 -Asystem(unix) -Asystem(svr4) -Acpu(i386) -Amachine(i386)"
151 If not -ansi, -traditional, or restricting include files to one
152 specific source target, specify full DG/UX features.
155 #define CPP_SPEC "%{!ansi:%{!traditional:-D__OPEN_NAMESPACE__}}"
157 /* Assembler support (legends for mxdb). */
160 %{mno-legend:%{mstandard:-Wc,off}}\
161 %{g:%{!mno-legend:-Wc,-fix-bb,-s\"%i\"\
162 %{traditional:,-lc}%{!traditional:,-lansi-c}\
163 %{mstandard:,-keep-std}\
164 %{mexternal-legend:,-external}}}"
166 /* Override svr4.h. */
168 /* hassey 3/12/94 keep svr4 ASM_FINAL_SPEC allows -pipe to work */
170 /* Linker and library spec's.
171 -static, -shared, -symbolic, -h* and -z* access AT&T V.4 link options.
172 -svr4 instructs gcc to place /usr/lib/values-X[cat].o on link the line.
173 The absence of -msvr4 indicates linking done in a COFF environment and
174 adds the link script to the link line. In all environments, the first
175 and last objects are crtbegin.o and crtend.o.
176 When the -G link option is used (-shared and -symbolic) a final link is
181 "%{!shared:%{!symbolic:-lc}}"
184 #define LINK_SPEC "%{z*} %{h*} %{v:-V} \
185 %{static:-dn -Bstatic} \
187 %{symbolic:-Bsymbolic -G -dy} \
188 %{pg:-L/usr/lib/libp}%{p:-L/usr/lib/libp}"
192 #undef STARTFILE_SPEC
193 #define STARTFILE_SPEC "%{!shared:%{!symbolic:%{pg:gcrt1.o%s} \
194 %{!pg:%{p:mcrt1.o%s} \
196 %{pg:gcrti.o%s}%{!pg:crti.o%s} \
198 %{ansi:values-Xc.o%s} \
199 %{!ansi:%{traditional:values-Xt.o%s} \
200 %{!traditional:values-Xa.o%s}}"
203 #define ENDFILE_SPEC "crtend.o%s %{pg:gcrtn.o}%{!pg:crtn.o%s}"
207 #undef STARTFILE_SPEC
208 #define STARTFILE_SPEC "%{!shared:%{!symbolic:%{pg:gcrt1.o%s} \
209 %{!pg:%{p:/lib/mcrt1.o%s} \
210 %{!p:/lib/crt1.o%s}}} \
211 %{pg:gcrti.o%s}%{!pg:/lib/crti.o%s}} \
213 %{ansi:/lib/values-Xc.o%s} \
214 %{!ansi:%{traditional:/lib/values-Xt.o%s} \
215 %{!traditional:/lib/values-Xa.o%s}}"
218 #define ENDFILE_SPEC "crtend.o%s %{pg:gcrtn.o}%{!pg:/lib/crtn.o}"
220 #endif /* CROSS_COMPILE */
222 /* The maximum alignment which the object file format can support.
223 page alignment would seem to be enough */
224 #undef MAX_OFILE_ALIGNMENT
225 #define MAX_OFILE_ALIGNMENT 0x1000
227 /* Must use data section for relocatable constants when pic. */
228 #undef SELECT_RTX_SECTION
229 #define SELECT_RTX_SECTION(MODE,RTX) \
231 if (flag_pic && symbolic_operand (RTX)) \
237 /* This supplements FUNCTION_ARG's definition in i386.h to check
238 TARGET_WARN_PASS_STRUCT */
241 #define FUNCTION_ARG(CUM, MODE, TYPE, NAMED) \
242 ((((MODE) == BLKmode && TARGET_WARN_PASS_STRUCT) ? \
243 warning ("argument is a structure"),0 : 0), \
244 (function_arg (&CUM, MODE, TYPE, NAMED)))
246 /* Add .align 1 to avoid .backalign bug in assembler */
247 #undef CONST_SECTION_ASM_OP
248 #define CONST_SECTION_ASM_OP ".section\t.rodata\n\t.align 1"