258 lines
9.7 KiB
C
258 lines
9.7 KiB
C
/* Operating system specific defines to be used when targeting GCC for some
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generic System V Release 4 system.
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Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
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Contributed by Ron Guilmette (rfg@monkeys.com).
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Renamed and changed to suit Dynix/ptx v4 and later.
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Modified by Tim Wright (timw@sequent.com).
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Modified by Janis Johnson (janis@us.ibm.com).
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This file is part of GNU CC.
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GNU CC is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU CC is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU CC; see the file COPYING. If not, write to
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the Free Software Foundation, 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA.
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*/
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/* Define a symbol indicating that we are using svr4.h. */
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#define USING_SVR4_H
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/* Use DWARF debugging info by default. */
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#undef PREFERRED_DEBUGGING_TYPE
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#define PREFERRED_DEBUGGING_TYPE DWARF_DEBUG
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/* Cpp, assembler, linker, library, and startfile spec's. */
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/* This defines which switch letters take arguments. On svr4, most of
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the normal cases (defined in gcc.c) apply, and we also have -h* and
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-z* options (for the linker). Note however that there is no such
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thing as a -T option for svr4. */
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#define SWITCH_TAKES_ARG(CHAR) \
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( (CHAR) == 'D' \
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|| (CHAR) == 'U' \
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|| (CHAR) == 'o' \
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|| (CHAR) == 'e' \
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|| (CHAR) == 'u' \
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|| (CHAR) == 'I' \
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|| (CHAR) == 'm' \
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|| (CHAR) == 'L' \
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|| (CHAR) == 'A' \
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|| (CHAR) == 'h' \
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|| (CHAR) == 'z')
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/* This defines which multi-letter switches take arguments. On svr4,
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there are no such switches except those implemented by GCC itself. */
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#define WORD_SWITCH_TAKES_ARG(STR) \
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(DEFAULT_WORD_SWITCH_TAKES_ARG (STR) \
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&& strcmp (STR, "Tdata") && strcmp (STR, "Ttext") \
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&& strcmp (STR, "Tbss"))
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/* You should redefine CPP_PREDEFINES in any file which includes this one.
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The definition should be appropriate for the type of target system
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involved, and it should include any -A (assertion) options which are
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appropriate for the given target system. */
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#undef CPP_PREDEFINES
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/* Provide an ASM_SPEC appropriate for svr4. Here we try to support as
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many of the specialized svr4 assembler options as seems reasonable,
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given that there are certain options which we can't (or shouldn't)
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support directly due to the fact that they conflict with other options
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for other svr4 tools (e.g. ld) or with other options for GCC itself.
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For example, we don't support the -o (output file) or -R (remove
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input file) options because GCC already handles these things. We
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also don't support the -m (run m4) option for the assembler because
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that conflicts with the -m (produce load map) option of the svr4
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linker. We do however allow passing arbitrary options to the svr4
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assembler via the -Wa, option.
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Note that gcc doesn't allow a space to follow -Y in a -Ym,* or -Yd,*
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option.
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*/
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#undef ASM_SPEC
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#ifdef USE_GAS
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#define ASM_SPEC \
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"%{v:-V} %{Qy:} %{!Qn:-Qy} %{n} %{T} %{Ym,*} %{Yd,*} %{Wa,*:%*}"
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#else
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#define ASM_SPEC \
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"-no_0f_fix -no_eflags_chk %{v:-V} %{Qy:} %{!Qn:-Qy} %{n} %{T} %{Ym,*} %{Yd,*} %{Wa,*:%*}"
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#endif
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/* svr4 assemblers need the `-' (indicating input from stdin) to come after
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the -o option (and its argument) for some reason. If we try to put it
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before the -o option, the assembler will try to read the file named as
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the output file in the -o option as an input file (after it has already
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written some stuff to it) and the binary stuff contained therein will
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cause totally confuse the assembler, resulting in many spurious error
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messages. */
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#undef ASM_FINAL_SPEC
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#define ASM_FINAL_SPEC "%{pipe:-}"
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/* Provide a LIB_SPEC appropriate for svr4. Here we tack on the default
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standard C library (unless we are building a shared library). */
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#undef LIB_SPEC
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#define LIB_SPEC "%{!shared:%{!symbolic:-lc}}"
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/* Provide a LIBGCC_SPEC appropriate for svr4. We also want to exclude
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libgcc when -symbolic. */
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#undef LIBGCC_SPEC
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#define LIBGCC_SPEC "%{!shared:%{!symbolic:-lgcc}}"
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/* Provide an ENDFILE_SPEC appropriate for svr4. Here we tack on our own
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magical crtend.o file (see crtstuff.c) which provides part of the
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support for getting C++ file-scope static object constructed before
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entering `main', followed by the normal svr3/svr4 "finalizer" file,
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which is either `gcrtn.o' or `crtn.o'. */
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#undef ENDFILE_SPEC
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#define ENDFILE_SPEC "crtend.o%s %{pg:gcrtn.o}%{!pg:crtn.o%s}"
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/* Provide a LINK_SPEC appropriate for svr4. Here we provide support
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for the special GCC options -static, -shared, and -symbolic which
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allow us to link things in one of these three modes by applying the
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appropriate combinations of options at link-time. We also provide
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support here for as many of the other svr4 linker options as seems
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reasonable, given that some of them conflict with options for other
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svr4 tools (e.g. the assembler). In particular, we do support the
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-z*, -V, -b, -t, -Qy, -Qn, and -YP* options here, and the -e*,
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-l*, -o*, -r, -s, -u*, and -L* options are directly supported
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by gcc.c itself. We don't directly support the -m (generate load
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map) option because that conflicts with the -m (run m4) option of
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the svr4 assembler. We also don't directly support the svr4 linker's
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-I* or -M* options because these conflict with existing GCC options.
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We do however allow passing arbitrary options to the svr4 linker
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via the -Wl, option. We don't support the svr4 linker's -a option
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at all because it is totally useless and because it conflicts with
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GCC's own -a option.
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Note that gcc doesn't allow a space to follow -Y in a -YP,* option.
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When the -G link option is used (-shared and -symbolic) a final link is
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not being done. */
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#undef LINK_SPEC
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#define LINK_SPEC "%{h*} %{v:-V} \
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%{b} %{Wl,*:%*} \
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%{static:-dn -Bstatic} \
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%{shared:-G -dy -z text} \
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%{symbolic:-Bsymbolic -G -dy -z text} \
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%{G:-G} \
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%{YP,*} \
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%{!YP,*:%{p:-Y P,/lib/libp:/usr/lib/libp:/lib:/usr/lib} \
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%{!p:-Y P,/lib:/usr/lib}} \
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%{Qy:} %{!Qn:-Qy}"
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/* Gcc automatically adds in one of the files /lib/values-Xc.o,
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/lib/values-Xa.o, or /lib/values-Xt.o for each final link
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step (depending upon the other gcc options selected, such as
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-traditional and -ansi). These files each contain one (initialized)
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copy of a special variable called `_lib_version'. Each one of these
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files has `_lib_version' initialized to a different (enum) value.
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The SVR4 library routines query the value of `_lib_version' at run
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to decide how they should behave. Specifically, they decide (based
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upon the value of `_lib_version') if they will act in a strictly ANSI
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conforming manner or not.
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*/
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#undef STARTFILE_SPEC
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#define STARTFILE_SPEC "%{!shared: \
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%{!symbolic: \
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%{pg:gcrt1.o%s}%{!pg:%{p:mcrt1.o%s}%{!p:crt1.o%s}}}}\
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%{pg:gcrti.o%s}%{!pg:crti.o%s} \
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%{ansi:values-Xc.o%s} \
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%{!ansi: \
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%{traditional:values-Xt.o%s} \
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%{!traditional:values-Xa.o%s}} \
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crtbegin.o%s"
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/* Allow #sccs in preprocessor. */
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#define SCCS_DIRECTIVE
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/* Don't use bcopy, which doesn't handle overlaps before DYNIX/ptx 4.6. */
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#undef HAVE_BCOPY
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/* The numbers used to denote specific machine registers in the System V
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Release 4 DWARF debugging information are quite likely to be totally
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different from the numbers used in BSD stabs debugging information
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for the same kind of target machine. Thus, we undefine the macro
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DBX_REGISTER_NUMBER here as an extra inducement to get people to
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provide proper machine-specific definitions of DBX_REGISTER_NUMBER
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(which is also used to provide DWARF registers numbers in dwarfout.c)
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in their tm.h files which include this file. */
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#undef DBX_REGISTER_NUMBER
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/* Like block addresses, stabs line numbers are relative to the
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current function. */
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#undef ASM_OUTPUT_SOURCE_LINE
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#define ASM_OUTPUT_SOURCE_LINE(file, line) \
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do \
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{ \
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static int sym_lineno = 1; \
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fprintf (file, ".stabn 68,0,%d,.LM%d-", \
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line, sym_lineno); \
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assemble_name (file, \
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XSTR (XEXP (DECL_RTL (current_function_decl), 0), 0));\
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fprintf (file, "\n.LM%d:\n", sym_lineno); \
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sym_lineno += 1; \
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} \
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while (0)
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/* Generate a blank trailing N_SO to mark the end of the .o file, since
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we can't depend upon the linker to mark .o file boundaries with
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embedded stabs. */
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#undef DBX_OUTPUT_MAIN_SOURCE_FILE_END
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#define DBX_OUTPUT_MAIN_SOURCE_FILE_END(FILE, FILENAME) \
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fprintf (FILE, \
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"\t.text\n\t.stabs \"\",%d,0,0,.Letext\n.Letext:\n", N_SO)
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/* Define the actual types of some ANSI-mandated types. (These
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definitions should work for most SVR4 systems). */
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#undef SIZE_TYPE
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#define SIZE_TYPE "unsigned int"
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#undef PTRDIFF_TYPE
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#define PTRDIFF_TYPE "int"
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#undef WCHAR_TYPE
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#define WCHAR_TYPE "long int"
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#undef WCHAR_TYPE_SIZE
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#define WCHAR_TYPE_SIZE BITS_PER_WORD
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/* This says how to output assembler code to declare an uninitialized
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external linkage data item. There's a bug in the DYNIX/ptx linker
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(PR 254649) when the alignment for such an object is specified, so
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ignore the ALIGN parameter. */
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#undef ASM_OUTPUT_ALIGNED_COMMON
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#define ASM_OUTPUT_ALIGNED_COMMON(FILE, NAME, SIZE, ALIGN) \
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do { \
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fprintf ((FILE), "%s", COMMON_ASM_OP); \
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assemble_name ((FILE), (NAME)); \
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fprintf ((FILE), ",%u\n", (SIZE)); \
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} while (0)
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