229 lines
7.8 KiB
C
229 lines
7.8 KiB
C
/* Definitions of target machine for GNU compiler for Intel 80386
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running FreeBSD.
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Copyright (C) 1988, 1992, 1994, 1996, 1997, 1999, 2000, 2002, 2003
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Free Software Foundation, Inc.
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Contributed by Poul-Henning Kamp <phk@login.dkuug.dk>
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Continued development by David O'Brien <obrien@NUXI.org>
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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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/* Don't assume anything about the header files. */
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#define NO_IMPLICIT_EXTERN_C
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/* This goes away when the math-emulator is fixed */
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#undef TARGET_SUBTARGET_DEFAULT
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#define TARGET_SUBTARGET_DEFAULT \
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(MASK_80387 | MASK_IEEE_FP | MASK_FLOAT_RETURNS | MASK_NO_FANCY_MATH_387)
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/* The macro defined in i386.h doesn't work with the old gas of
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FreeBSD 2.x. The definition in sco.h and sol2.h appears to work,
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but it turns out that, even though the assembler doesn't complain,
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we get incorrect results. Fortunately, the definition in
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defaults.h works. */
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#undef ASM_PREFERRED_EH_DATA_FORMAT
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#define TARGET_OS_CPP_BUILTINS() \
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do \
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{ \
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builtin_define_std ("unix"); \
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builtin_define ("__FreeBSD__"); \
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builtin_assert ("system=unix"); \
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builtin_assert ("system=bsd"); \
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builtin_assert ("system=FreeBSD"); \
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} \
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while (0)
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/* Like the default, except no -lg. */
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#define LIB_SPEC "%{!shared:%{!pg:-lc}%{pg:-lc_p}}"
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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 "int"
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#undef WCHAR_TYPE_SIZE
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#define WCHAR_TYPE_SIZE BITS_PER_WORD
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/* Override the default comment-starter of "/". */
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#undef ASM_COMMENT_START
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#define ASM_COMMENT_START "#"
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#undef ASM_APP_ON
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#define ASM_APP_ON "#APP\n"
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#undef ASM_APP_OFF
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#define ASM_APP_OFF "#NO_APP\n"
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/* FreeBSD using a.out does not support DWARF2 unwinding mechanisms. */
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#define DWARF2_UNWIND_INFO 0
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/* Don't default to pcc-struct-return, because in FreeBSD we prefer the
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superior nature of the older gcc way. */
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#define DEFAULT_PCC_STRUCT_RETURN 0
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/* Ensure we the configuration knows our system correctly so we can link with
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libraries compiled with the native cc. */
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#undef NO_DOLLAR_IN_LABEL
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/* i386 freebsd still uses old binutils that don't insert nops by default
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when the .align directive demands to insert extra space in the text
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segment. */
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#undef ASM_OUTPUT_ALIGN
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#define ASM_OUTPUT_ALIGN(FILE,LOG) \
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if ((LOG)!=0) fprintf ((FILE), "\t.align %d,0x90\n", (LOG))
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/* Profiling routines, partially copied from i386/osfrose.h. */
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/* Tell final.c that we don't need a label passed to mcount. */
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#define NO_PROFILE_COUNTERS 1
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#undef MCOUNT_NAME
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#define MCOUNT_NAME "mcount"
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#undef PROFILE_COUNT_REGISTER
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#define PROFILE_COUNT_REGISTER "eax"
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/*
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* Some imports from svr4.h in support of shared libraries.
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* Currently, we need the DECLARE_OBJECT_SIZE stuff.
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*/
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/* Define the strings used for the special svr4 .type and .size directives.
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These strings generally do not vary from one system running svr4 to
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another, but if a given system (e.g. m88k running svr) needs to use
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different pseudo-op names for these, they may be overridden in the
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file which includes this one. */
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#define TYPE_ASM_OP "\t.type\t"
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#define SIZE_ASM_OP "\t.size\t"
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#define SET_ASM_OP "\t.set\t"
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/* The following macro defines the format used to output the second
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operand of the .type assembler directive. Different svr4 assemblers
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expect various different forms for this operand. The one given here
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is just a default. You may need to override it in your machine-
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specific tm.h file (depending upon the particulars of your assembler). */
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#define TYPE_OPERAND_FMT "@%s"
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#define HANDLE_SYSV_PRAGMA 1
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#define ASM_WEAKEN_LABEL(FILE,NAME) \
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do { fputs ("\t.weak\t", FILE); assemble_name (FILE, NAME); \
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fputc ('\n', FILE); } while (0)
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/* Write the extra assembler code needed to declare a function's result.
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Most svr4 assemblers don't require any special declaration of the
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result value, but there are exceptions. */
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#ifndef ASM_DECLARE_RESULT
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#define ASM_DECLARE_RESULT(FILE, RESULT)
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#endif
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/* These macros generate the special .type and .size directives which
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are used to set the corresponding fields of the linker symbol table
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entries in an ELF object file under SVR4. These macros also output
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the starting labels for the relevant functions/objects. */
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/* Write the extra assembler code needed to declare a function properly.
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Some svr4 assemblers need to also have something extra said about the
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function's return value. We allow for that here. */
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#define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \
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do \
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{ \
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ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "function"); \
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ASM_DECLARE_RESULT (FILE, DECL_RESULT (DECL)); \
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ASM_OUTPUT_LABEL (FILE, NAME); \
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} \
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while (0)
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/* Write the extra assembler code needed to declare an object properly. */
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#define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL) \
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do \
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{ \
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HOST_WIDE_INT size; \
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\
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ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "object"); \
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\
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size_directive_output = 0; \
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if (!flag_inhibit_size_directive \
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&& (DECL) && DECL_SIZE (DECL)) \
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{ \
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size_directive_output = 1; \
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size = int_size_in_bytes (TREE_TYPE (DECL)); \
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ASM_OUTPUT_SIZE_DIRECTIVE (FILE, NAME, size); \
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} \
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\
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ASM_OUTPUT_LABEL (FILE, NAME); \
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} \
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while (0)
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/* Output the size directive for a decl in rest_of_decl_compilation
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in the case where we did not do so before the initializer.
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Once we find the error_mark_node, we know that the value of
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size_directive_output was set
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by ASM_DECLARE_OBJECT_NAME when it was run for the same decl. */
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#define ASM_FINISH_DECLARE_OBJECT(FILE, DECL, TOP_LEVEL, AT_END) \
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do { \
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const char *name = XSTR (XEXP (DECL_RTL (DECL), 0), 0); \
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HOST_WIDE_INT size; \
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if (!flag_inhibit_size_directive && DECL_SIZE (DECL) \
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&& ! AT_END && TOP_LEVEL \
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&& DECL_INITIAL (DECL) == error_mark_node \
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&& !size_directive_output) \
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{ \
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size_directive_output = 1; \
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size = int_size_in_bytes (TREE_TYPE (DECL)); \
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ASM_OUTPUT_SIZE_DIRECTIVE (FILE, name, size); \
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} \
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} while (0)
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/* This is how to declare the size of a function. */
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#define ASM_DECLARE_FUNCTION_SIZE(FILE, FNAME, DECL) \
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do { \
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if (!flag_inhibit_size_directive) \
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ASM_OUTPUT_MEASURED_SIZE (FILE, FNAME); \
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} while (0)
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#define ASM_SPEC " %| %{fpic:-k} %{fPIC:-k}"
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#define LINK_SPEC \
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"%{p:%e`-p' not supported; use `-pg' and gprof(1)} \
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%{shared:-Bshareable} \
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%{!shared:%{!nostdlib:%{!r:%{!e*:-e start}}} -dc -dp %{static:-Bstatic} \
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%{pg:-Bstatic} %{Z}} \
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%{assert*} %{R*}"
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#define STARTFILE_SPEC \
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"%{shared:c++rt0.o%s} \
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%{!shared:%{pg:gcrt0.o%s}%{!pg:%{static:scrt0.o%s}%{!static:crt0.o%s}}}"
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/* Define this so we can compile MS code for use with WINE. */
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#define HANDLE_PRAGMA_PACK_PUSH_POP
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/* FreeBSD 2.2.7's assembler does not support .quad properly. Do not
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use it. */
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#undef ASM_QUAD
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