gcc/config/lynx.h

   1 /* Target independent definitions for LynxOS.
   2    Copyright (C) 1993, 1994 Free Software Foundation, Inc.
   3
   4 This file is part of GNU CC.
   5
   6 GNU CC is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 2, or (at your option)
   9 any later version.
  10
  11 GNU CC is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GNU CC; see the file COPYING.  If not, write to
  18 the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
  19
  20 /* LynxOS is a multi-platform Unix, similar to SVR3, but not identical.
  21    We can get quite a bit from generic svr3, but have to do some overrides. */
  22
  23 #include "svr3.h"
  24
  25 /* Define various macros, depending on the combination of flags. */
  26
  27 #undef CPP_SPEC
  28 #define CPP_SPEC "%{mthreads:-D_MULTITHREADED}  \
  29   %{mposix:-D_POSIX_SOURCE}  \
  30   %{msystem-v:-I/usr/include_v}"
  31
  32 /* No asm spec needed, since using GNU assembler always. */
  33
  34 /* No linker spec needed, since using GNU linker always. */
  35
  36 #undef LIB_SPEC
  37 #define LIB_SPEC "%{mthreads:-L/lib/thread/}  \
  38   %{msystem-v:-lc_v}  \
  39   %{!msystem-v:%{mposix:-lc_p} -lc}"
  40
  41 /* Set the appropriate names for the Lynx startfiles. */
  42
  43 #undef STARTFILE_SPEC
  44 #define STARTFILE_SPEC "%{p:pinit1.o%s}%{!p:%{msystem-v:vinit1.o%s}%{!msystem-v:init1.o%s}}"
  45
  46 #undef ENDFILE_SPEC
  47 #define ENDFILE_SPEC "%{p:_etext.o%s}%{!p:initn.o%s}"
  48
  49 /* Override the svr3 versions. */
  50
  51 #undef WCHAR_TYPE
  52 #define WCHAR_TYPE "int"
  53
  54 #undef PTRDIFF_TYPE
  55 #define PTRDIFF_TYPE "long int"
  56
  57 /* We want to output DBX (stabs) debugging information normally.  */
  58
  59 #define DBX_DEBUGGING_INFO
  60 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
  61
  62 /* It is convenient to be able to generate standard coff debugging
  63    if requested via -gcoff. */
  64
  65 #define SDB_DEBUGGING_INFO
  66
  67 /* Be function-relative for block and source line stab directives. */
  68
  69 #define DBX_BLOCKS_FUNCTION_RELATIVE 1
  70
  71 /* but, to make this work, functions must appear prior to line info */
  72
  73 #define DBX_FUNCTION_FIRST
  74
  75 /* Generate a blank trailing N_SO to mark the end of the .o file, since
  76    we can't depend upon the linker to mark .o file boundaries with
  77    embedded stabs.  */
  78
  79 #define DBX_OUTPUT_MAIN_SOURCE_FILE_END(FILE, FILENAME)                 \
  80   fprintf (FILE,                                                        \
  81            "\t.text\n\t.stabs \"\",%d,0,0,Letext\nLetext:\n", N_SO)
  82
  83 #undef  ASM_OUTPUT_SOURCE_LINE
  84 #define ASM_OUTPUT_SOURCE_LINE(file, line)              \
  85   { static int sym_lineno = 1;                          \
  86     fprintf (file, ".stabn 68,0,%d,.LM%d-",             \
  87              line, sym_lineno);                         \
  88     assemble_name (file,                                \
  89                    XSTR (XEXP (DECL_RTL (current_function_decl), 0), 0)); \
  90     fprintf (file, "\n.LM%d:\n", sym_lineno);           \
  91     sym_lineno += 1; }
  92
  93 /* Handle #pragma pack and sometimes #pragma weak.  */
  94
  95 #define HANDLE_SYSV_PRAGMA
  96
  97 /* Some additional command-line options. */
  98
  99 #define TARGET_THREADS  (target_flags & MASK_THREADS)
 100 #define MASK_THREADS    0x40000000
 101
 102 #define TARGET_POSIX    (target_flags & MASK_POSIX)
 103 #define MASK_POSIX      0x20000000
 104
 105 #define TARGET_SYSTEM_V (target_flags & MASK_SYSTEM_V)
 106 #define MASK_SYSTEM_V   0x10000000
 107
 108 #undef SUBTARGET_SWITCHES
 109 #define SUBTARGET_SWITCHES \
 110     {"threads",         MASK_THREADS},          \
 111     {"posix",           MASK_POSIX},            \
 112     {"system-v",        MASK_SYSTEM_V},
 113
 114 #undef SUBTARGET_OVERRIDE_OPTIONS
 115 #define SUBTARGET_OVERRIDE_OPTIONS \
 116 { if (TARGET_SYSTEM_V && profile_flag)                  \
 117     warning ("-msystem-v and -p are incompatible");             \
 118   if (TARGET_SYSTEM_V && TARGET_THREADS)                        \
 119     warning ("-msystem-v and -mthreads are incompatible"); }
 120
 121 /* Define this so that C++ destructors will use atexit, since LynxOS
 122    calls exit after main returns.  */
 123
 124 #define HAVE_ATEXIT
 125
 126 /* Since init.o et al put all sorts of stuff into the init section,
 127    we can't use the standard init section support in crtbegin.o. */
 128
 129 #undef INIT_SECTION_ASM_OP
 130
 131 #undef EXTRA_SECTIONS
 132 #define EXTRA_SECTIONS in_const, in_bss, in_ctors, in_dtors, in_fini,
 133
 134 #undef EXTRA_SECTION_FUNCTIONS
 135 #define EXTRA_SECTION_FUNCTIONS                                 \
 136   CONST_SECTION_FUNCTION                                        \
 137   BSS_SECTION_FUNCTION                                          \
 138   CTORS_SECTION_FUNCTION                                        \
 139   DTORS_SECTION_FUNCTION                                        \
 140   FINI_SECTION_FUNCTION
 141
 142 #undef CTORS_SECTION_ASM_OP
 143 #define CTORS_SECTION_ASM_OP    ".section\t.ctors"
 144 #undef DTORS_SECTION_ASM_OP
 145 #define DTORS_SECTION_ASM_OP    ".section\t.dtors"
 146
 147 #define INT_ASM_OP              ".long"
 148
 149 /* A C statement (sans semicolon) to output an element in the table of
 150    global constructors.  */
 151 #undef ASM_OUTPUT_CONSTRUCTOR
 152 #define ASM_OUTPUT_CONSTRUCTOR(FILE,NAME)                               \
 153   do {                                                                  \
 154     ctors_section ();                                                   \
 155     fprintf (FILE, "\t%s\t ", INT_ASM_OP);                              \
 156     assemble_name (FILE, NAME);                                         \
 157     fprintf (FILE, "\n");                                               \
 158   } while (0)
 159
 160 /* A C statement (sans semicolon) to output an element in the table of
 161    global destructors.  */
 162 #undef ASM_OUTPUT_DESTRUCTOR
 163 #define ASM_OUTPUT_DESTRUCTOR(FILE,NAME)                                \
 164   do {                                                                  \
 165     dtors_section ();                                                   \
 166     fprintf (FILE, "\t%s\t ", INT_ASM_OP);                              \
 167     assemble_name (FILE, NAME);                                         \
 168     fprintf (FILE, "\n");                                               \
 169   } while (0)
 170
 171 #undef DO_GLOBAL_CTORS_BODY
 172 #undef DO_GLOBAL_DTORS_BODY