--- /dev/null
+/* svr3.h -- operating system specific defines to be used when
+ targeting GCC for some generic System V Release 3 system.
+ Copyright (C) 1991 Free Software Foundation, Inc.
+
+ Written by Ron Guilmette (rfg@ncd.com).
+
+This file is part of GNU CC.
+
+GNU CC is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU CC is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU CC; see the file COPYING. If not, write to
+the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
+
+ To use this file, make up a file with a name like:
+
+ ?????svr3.h
+
+ where ????? is replaced by the name of the basic hardware that you
+ are targeting for. Then, in the file ?????svr3.h, put something
+ like:
+
+ #include "?????.h"
+ #include "svr3.h"
+
+ followed by any really system-specific defines (or overrides of
+ defines) which you find that you need. For example, CPP_PREDEFINES
+ is defined here with only the defined -Dunix and -DSVR3. You should
+ probably override that in your target-specific ?????svr3.h file
+ with a set of defines that includes these, but also contains an
+ appropriate define for the type of hardware that you are targeting.
+*/
+
+/* Define a symbol so that libgcc* can know what sort of operating
+ environment and assembler syntax we are targeting for. */
+#define SVR3_target
+
+/* Cpp, assembler, linker, library, and startfile spec's. */
+
+/* You should redefine CPP_PREDEFINES in any file which includes this one.
+ The definition should be appropriate for the type of target system
+ involved, and it should include any -A (assertion) options which are
+ appropriate for the given target system. */
+
+#undef CPP_PREDEFINES
+
+/* Output at beginning of assembler file. */
+/* The .file command should always begin the output. */
+
+#undef ASM_FILE_START
+#define ASM_FILE_START(FILE) \
+ do { output_file_directive ((FILE), main_input_filename); \
+ if (optimize) ASM_FILE_START_1 (FILE); \
+ } while (0)
+
+/* By default, do nothing: a few machines support .optim, but not most. */
+#undef ASM_FILE_START_1
+#define ASM_FILE_START_1(FILE)
+
+/* This says how to output an assembler line
+ to define a global common symbol. */
+/* We don't use ROUNDED because the standard compiler doesn't,
+ and the linker gives error messages if a common symbol
+ has more than one length value. */
+
+#undef ASM_OUTPUT_COMMON
+#define ASM_OUTPUT_COMMON(FILE, NAME, SIZE, ROUNDED) \
+( fputs (".comm ", (FILE)), \
+ assemble_name ((FILE), (NAME)), \
+ fprintf ((FILE), ",%u\n", (SIZE)))
+
+/* This says how to output an assembler line
+ to define a local common symbol. */
+
+/* Note that using bss_section here caused errors
+ in building shared libraries on system V.3. */
+#undef ASM_OUTPUT_LOCAL
+#define ASM_OUTPUT_LOCAL(FILE, NAME, SIZE, ROUNDED) \
+ do { \
+ int align = exact_log2 (ROUNDED); \
+ if (align > 2) align = 2; \
+ data_section (); \
+ ASM_OUTPUT_ALIGN ((FILE), align == -1 ? 2 : align); \
+ ASM_OUTPUT_LABEL ((FILE), (NAME)); \
+ fprintf ((FILE), "\t.set .,.+%u\n", (ROUNDED)); \
+ } while (0)
+
+#if 0 /* For now, let's leave these machine-specific. */
+/* Use crt1.o as a startup file and crtn.o as a closing file. */
+
+#define STARTFILE_SPEC \
+ "%{pg:gcrt1.o%s}%{!pg:%{p:mcrt1.o%s}%{!p:crt1.o%s}}"
+
+#define LIB_SPEC "%{p:-L/usr/lib/libp}%{pg:-L/usr/lib/libp} -lc crtn.o%s"
+
+/* Special flags for the linker. I don't know what they do. */
+
+#define LINK_SPEC "%{T*} %{z:-lm}"
+#endif
+
+/* Allow #sccs in preprocessor. */
+
+#define SCCS_DIRECTIVE
+
+/* Output #ident as a .ident. */
+
+#define ASM_OUTPUT_IDENT(FILE, NAME) \
+ fprintf (FILE, "\t.ident \"%s\"\n", NAME);
+
+/* Use periods rather than dollar signs in special g++ assembler names. */
+
+#define NO_DOLLAR_IN_LABEL
+
+/* Implicit library calls should use memcpy, not bcopy, etc. */
+
+#define TARGET_MEM_FUNCTIONS
+
+/* System V Release 3 uses COFF debugging info. */
+
+#define SDB_DEBUGGING_INFO
+
+/* We don't want to output DBX debugging information. */
+
+#undef DBX_DEBUGGING_INFO
+
+/* Define the actual types of some ANSI-mandated types. These
+ definitions should work for most SVR3 systems. */
+
+#undef SIZE_TYPE
+#define SIZE_TYPE "unsigned int"
+
+#undef PTRDIFF_TYPE
+#define PTRDIFF_TYPE "int"
+
+#undef WCHAR_TYPE
+#define WCHAR_TYPE "long int"
+
+#undef WCHAR_TYPE_SIZE
+#define WCHAR_TYPE_SIZE BITS_PER_WORD
+
+/* Assembler pseudos to introduce constants of various size. These
+ definitions hsould work for most svr3 systems. */
+
+#undef ASM_BYTE_OP
+#define ASM_BYTE_OP "\t.byte"
+
+/* This is how to output a reference to a user-level label named NAME.
+ `assemble_name' uses this.
+
+ For System V Release 3 the convention is to prepend a leading
+ underscore onto user-level symbol names. */
+
+#undef ASM_OUTPUT_LABELREF
+#define ASM_OUTPUT_LABELREF(FILE,NAME) fprintf (FILE, "_%s", NAME)
+
+/* Support const sections and the ctors and dtors sections for g++.
+ Note that there appears to be two different ways to support const
+ sections at the moment. You can either #define the symbol
+ READONLY_DATA_SECTION (giving it some code which switches to the
+ readonly data section) or else you can #define the symbols
+ EXTRA_SECTIONS, EXTRA_SECTION_FUNCTIONS, SELECT_SECTION, and
+ SELECT_RTX_SECTION. We do both here just to be on the safe side.
+ However, use of the const section is turned off by default
+ unless the specific tm.h file turns it on by defining
+ USE_CONST_SECTION as 1. */
+
+/* The support for constructors and destructors depends on two
+ machine-specific macros that the individual tm.h file has to define:
+
+ CTORS_SECTION_ASM_OP should be defined to concatenate
+ the macro INIT_SECTION_ASM_OP, a newline, and a push instruction
+ to push a word containing 0 (or some equivalent of that).
+
+ ASM_OUTPUT_CONSTRUCTOR should be defined
+ to push the address of the constructor. */
+
+#define USE_CONST_SECTION 0
+
+#define INIT_SECTION_ASM_OP "\t.section\t.init"
+#define FINI_SECTION_ASM_OP ".section .fini,\"x\""
+#define CONST_SECTION_ASM_OP "\t.section\t.rodata, \"x\""
+
+#define DTORS_SECTION_ASM_OP FINI_SECTION_ASM_OP
+/* CTORS_SECTION_ASM_OP is machine-dependent
+ because it pushes on the stack. */
+
+#define DO_GLOBAL_CTORS_BODY \
+do { \
+ func_ptr *__CTOR_LIST__ = __builtin_alloca (0), *p; \
+ for (p = __CTOR_LIST__; *p; ) \
+ (*p++) (); \
+} while (0)
+
+/* Add extra sections .init and .fini, in addition to .bss from att386.h. */
+
+#undef EXTRA_SECTIONS
+#define EXTRA_SECTIONS in_const, in_bss, in_init, in_fini
+
+#undef EXTRA_SECTION_FUNCTIONS
+#define EXTRA_SECTION_FUNCTIONS \
+ CONST_SECTION_FUNCTION \
+ BSS_SECTION_FUNCTION \
+ INIT_SECTION_FUNCTION \
+ FINI_SECTION_FUNCTION
+
+#define INIT_SECTION_FUNCTION \
+void \
+init_section () \
+{ \
+ if (in_section != in_init) \
+ { \
+ fprintf (asm_out_file, "\t%s\n", INIT_SECTION_ASM_OP); \
+ in_section = in_init; \
+ } \
+}
+
+#define FINI_SECTION_FUNCTION \
+void \
+fini_section () \
+{ \
+ if (in_section != in_fini) \
+ { \
+ fprintf (asm_out_file, "\t%s\n", FINI_SECTION_ASM_OP); \
+ in_section = in_fini; \
+ } \
+}
+
+#define READONLY_DATA_SECTION() const_section ()
+
+#define CONST_SECTION_FUNCTION \
+void \
+const_section () \
+{ \
+ extern void text_section(); \
+ if (!USE_CONST_SECTION) \
+ text_section(); \
+ else if (in_section != in_const) \
+ { \
+ fprintf (asm_out_file, "%s\n", CONST_SECTION_ASM_OP); \
+ in_section = in_const; \
+ } \
+}
+
+#if 0
+#define CTORS_SECTION_FUNCTION \
+void \
+ctors_section () \
+{ \
+ if (in_section != in_ctors) \
+ { \
+ fprintf (asm_out_file, "%s\n", CTORS_SECTION_ASM_OP); \
+ in_section = in_ctors; \
+ } \
+}
+
+#define DTORS_SECTION_FUNCTION \
+void \
+dtors_section () \
+{ \
+ if (in_section != in_dtors) \
+ { \
+ fprintf (asm_out_file, "%s\n", DTORS_SECTION_ASM_OP); \
+ in_section = in_dtors; \
+ } \
+}
+#endif
+
+/* This is machine-dependent
+ because it needs to push something on the stack. */
+#undef ASM_OUTPUT_CONSTRUCTOR
+
+/* A C statement (sans semicolon) to output an element in the table of
+ global destructors. */
+#define ASM_OUTPUT_DESTRUCTOR(FILE,NAME) \
+ do { \
+ fini_section (); \
+ fprintf (FILE, "%s\t ", ASM_LONG); \
+ assemble_name (FILE, NAME); \
+ fprintf (FILE, "\n"); \
+ } while (0)
+
+/* A C statement or statements to switch to the appropriate
+ section for output of DECL. DECL is either a `VAR_DECL' node
+ or a constant of some sort. RELOC indicates whether forming
+ the initial value of DECL requires link-time relocations. */
+
+#define SELECT_SECTION(DECL,RELOC) \
+{ \
+ if (TREE_CODE (DECL) == STRING_CST) \
+ { \
+ if (! flag_writable_strings) \
+ const_section (); \
+ else \
+ data_section (); \
+ } \
+ else if (TREE_CODE (DECL) == VAR_DECL) \
+ { \
+ if ((0 && RELOC) /* should be (flag_pic && RELOC) */ \
+ || !TREE_READONLY (DECL) || TREE_SIDE_EFFECTS (DECL)) \
+ data_section (); \
+ else \
+ const_section (); \
+ } \
+ else \
+ const_section (); \
+}
+
+/* A C statement or statements to switch to the appropriate
+ section for output of RTX in mode MODE. RTX is some kind
+ of constant in RTL. The argument MODE is redundant except
+ in the case of a `const_int' rtx. Currently, these always
+ go into the const section. */
+
+#define SELECT_RTX_SECTION(MODE,RTX) const_section()
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