1 /* Operating system specific defines to be used when targeting GCC for some
2 generic System V Release 4 system.
3 Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
4 Contributed by Ron Guilmette (rfg@monkeys.com).
5 Renamed and changed to suit Dynix/ptx v4 and later.
6 Modified by Tim Wright (timw@sequent.com).
7 Modified by Janis Johnson (janis@us.ibm.com).
9 This file is part of GNU CC.
11 GNU CC is free software; you can redistribute it and/or modify
12 it under the terms of the GNU General Public License as published by
13 the Free Software Foundation; either version 2, or (at your option)
16 GNU CC is distributed in the hope that it will be useful,
17 but WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 GNU General Public License for more details.
21 You should have received a copy of the GNU General Public License
22 along with GNU CC; see the file COPYING. If not, write to
23 the Free Software Foundation, 59 Temple Place - Suite 330,
24 Boston, MA 02111-1307, USA.
28 /* Define a symbol indicating that we are using svr4.h. */
31 /* Use DWARF debugging info by default. */
33 #undef PREFERRED_DEBUGGING_TYPE
34 #define PREFERRED_DEBUGGING_TYPE DWARF_DEBUG
37 /* Cpp, assembler, linker, library, and startfile spec's. */
39 /* This defines which switch letters take arguments. On svr4, most of
40 the normal cases (defined in gcc.c) apply, and we also have -h* and
41 -z* options (for the linker). Note however that there is no such
42 thing as a -T option for svr4. */
44 #define SWITCH_TAKES_ARG(CHAR) \
57 /* This defines which multi-letter switches take arguments. On svr4,
58 there are no such switches except those implemented by GCC itself. */
60 #define WORD_SWITCH_TAKES_ARG(STR) \
61 (DEFAULT_WORD_SWITCH_TAKES_ARG (STR) \
62 && strcmp (STR, "Tdata") && strcmp (STR, "Ttext") \
63 && strcmp (STR, "Tbss"))
65 /* You should redefine CPP_PREDEFINES in any file which includes this one.
66 The definition should be appropriate for the type of target system
67 involved, and it should include any -A (assertion) options which are
68 appropriate for the given target system. */
71 /* Provide an ASM_SPEC appropriate for svr4. Here we try to support as
72 many of the specialized svr4 assembler options as seems reasonable,
73 given that there are certain options which we can't (or shouldn't)
74 support directly due to the fact that they conflict with other options
75 for other svr4 tools (e.g. ld) or with other options for GCC itself.
76 For example, we don't support the -o (output file) or -R (remove
77 input file) options because GCC already handles these things. We
78 also don't support the -m (run m4) option for the assembler because
79 that conflicts with the -m (produce load map) option of the svr4
80 linker. We do however allow passing arbitrary options to the svr4
81 assembler via the -Wa, option.
83 Note that gcc doesn't allow a space to follow -Y in a -Ym,* or -Yd,*
90 "%{v:-V} %{Qy:} %{!Qn:-Qy} %{n} %{T} %{Ym,*} %{Yd,*} %{Wa,*:%*}"
93 "-no_0f_fix -no_eflags_chk %{v:-V} %{Qy:} %{!Qn:-Qy} %{n} %{T} %{Ym,*} %{Yd,*} %{Wa,*:%*}"
96 /* svr4 assemblers need the `-' (indicating input from stdin) to come after
97 the -o option (and its argument) for some reason. If we try to put it
98 before the -o option, the assembler will try to read the file named as
99 the output file in the -o option as an input file (after it has already
100 written some stuff to it) and the binary stuff contained therein will
101 cause totally confuse the assembler, resulting in many spurious error
104 #undef ASM_FINAL_SPEC
105 #define ASM_FINAL_SPEC "%{pipe:-}"
107 /* Provide a LIB_SPEC appropriate for svr4. Here we tack on the default
108 standard C library (unless we are building a shared library). */
111 #define LIB_SPEC "%{!shared:%{!symbolic:-lc}}"
113 /* Provide a LIBGCC_SPEC appropriate for svr4. We also want to exclude
114 libgcc when -symbolic. */
117 #define LIBGCC_SPEC "%{!shared:%{!symbolic:-lgcc}}"
119 /* Provide an ENDFILE_SPEC appropriate for svr4. Here we tack on our own
120 magical crtend.o file (see crtstuff.c) which provides part of the
121 support for getting C++ file-scope static object constructed before
122 entering `main', followed by the normal svr3/svr4 "finalizer" file,
123 which is either `gcrtn.o' or `crtn.o'. */
126 #define ENDFILE_SPEC "crtend.o%s %{pg:gcrtn.o}%{!pg:crtn.o%s}"
128 /* Provide a LINK_SPEC appropriate for svr4. Here we provide support
129 for the special GCC options -static, -shared, and -symbolic which
130 allow us to link things in one of these three modes by applying the
131 appropriate combinations of options at link-time. We also provide
132 support here for as many of the other svr4 linker options as seems
133 reasonable, given that some of them conflict with options for other
134 svr4 tools (e.g. the assembler). In particular, we do support the
135 -z*, -V, -b, -t, -Qy, -Qn, and -YP* options here, and the -e*,
136 -l*, -o*, -r, -s, -u*, and -L* options are directly supported
137 by gcc.c itself. We don't directly support the -m (generate load
138 map) option because that conflicts with the -m (run m4) option of
139 the svr4 assembler. We also don't directly support the svr4 linker's
140 -I* or -M* options because these conflict with existing GCC options.
141 We do however allow passing arbitrary options to the svr4 linker
142 via the -Wl, option. We don't support the svr4 linker's -a option
143 at all because it is totally useless and because it conflicts with
146 Note that gcc doesn't allow a space to follow -Y in a -YP,* option.
148 When the -G link option is used (-shared and -symbolic) a final link is
152 #define LINK_SPEC "%{h*} %{v:-V} \
154 %{static:-dn -Bstatic} \
155 %{shared:-G -dy -z text} \
156 %{symbolic:-Bsymbolic -G -dy -z text} \
159 %{!YP,*:%{p:-Y P,/lib/libp:/usr/lib/libp:/lib:/usr/lib} \
160 %{!p:-Y P,/lib:/usr/lib}} \
163 /* Gcc automatically adds in one of the files /lib/values-Xc.o
164 or /lib/values-Xa.o, for each final link step (depending upon the other
165 gcc options selected, such as -ansi). These files each contain one
166 (initialized) copy of a special variable called `_lib_version'. Each
167 one of these files has `_lib_version' initialized to a different (enum)
168 value. The SVR4 library routines query the value of `_lib_version'
169 at run to decide how they should behave. Specifically, they decide
170 (based upon the value of `_lib_version') if they will act in a strictly
171 ANSI conforming manner or not.
174 #undef STARTFILE_SPEC
175 #define STARTFILE_SPEC "%{!shared: \
177 %{pg:gcrt1.o%s}%{!pg:%{p:mcrt1.o%s}%{!p:crt1.o%s}}}}\
178 %{pg:gcrti.o%s}%{!pg:crti.o%s} \
179 %{ansi:values-Xc.o%s} \
180 %{!ansi:values-Xa.o%s} \
183 /* Allow #sccs in preprocessor. */
185 #define SCCS_DIRECTIVE
187 /* Don't use bcopy, which doesn't handle overlaps before DYNIX/ptx 4.6. */
191 /* The numbers used to denote specific machine registers in the System V
192 Release 4 DWARF debugging information are quite likely to be totally
193 different from the numbers used in BSD stabs debugging information
194 for the same kind of target machine. Thus, we undefine the macro
195 DBX_REGISTER_NUMBER here as an extra inducement to get people to
196 provide proper machine-specific definitions of DBX_REGISTER_NUMBER
197 (which is also used to provide DWARF registers numbers in dwarfout.c)
198 in their tm.h files which include this file. */
200 #undef DBX_REGISTER_NUMBER
202 /* Like block addresses, stabs line numbers are relative to the
205 #undef ASM_OUTPUT_SOURCE_LINE
206 #define ASM_OUTPUT_SOURCE_LINE(file, line) \
209 static int sym_lineno = 1; \
210 fprintf (file, ".stabn 68,0,%d,.LM%d-", \
212 assemble_name (file, \
213 XSTR (XEXP (DECL_RTL (current_function_decl), 0), 0));\
214 fprintf (file, "\n.LM%d:\n", sym_lineno); \
219 /* Generate a blank trailing N_SO to mark the end of the .o file, since
220 we can't depend upon the linker to mark .o file boundaries with
223 #undef DBX_OUTPUT_MAIN_SOURCE_FILE_END
224 #define DBX_OUTPUT_MAIN_SOURCE_FILE_END(FILE, FILENAME) \
226 "\t.text\n\t.stabs \"\",%d,0,0,.Letext\n.Letext:\n", N_SO)
228 /* Define the actual types of some ANSI-mandated types. (These
229 definitions should work for most SVR4 systems). */
232 #define SIZE_TYPE "unsigned int"
235 #define PTRDIFF_TYPE "int"
238 #define WCHAR_TYPE "long int"
240 #undef WCHAR_TYPE_SIZE
241 #define WCHAR_TYPE_SIZE BITS_PER_WORD
243 /* This says how to output assembler code to declare an uninitialized
244 external linkage data item. There's a bug in the DYNIX/ptx linker
245 (PR 254649) when the alignment for such an object is specified, so
246 ignore the ALIGN parameter. */
248 #undef ASM_OUTPUT_ALIGNED_COMMON
249 #define ASM_OUTPUT_ALIGNED_COMMON(FILE, NAME, SIZE, ALIGN) \
251 fprintf ((FILE), "%s", COMMON_ASM_OP); \
252 assemble_name ((FILE), (NAME)); \
253 fprintf ((FILE), ",%u\n", (SIZE)); \