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Annotation of gcc/config/lynx.h, revision 1.1.1.2

1.1.1.2 ! root        1: /* Target independent definitions for LynxOS.
        !             2:    Copyright (C) 1993, 1994 Free Software Foundation, Inc.
1.1       root        3: 
1.1.1.2 ! root        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. */
1.1       root       26: 
                     27: #undef CPP_SPEC
1.1.1.2 ! root       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. */
1.1       root       33: 
1.1.1.2 ! root       34: /* No linker spec needed, since using GNU linker always. */
1.1       root       35: 
                     36: #undef LIB_SPEC
1.1.1.2 ! root       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. */
1.1       root       42: 
                     43: #undef STARTFILE_SPEC
1.1.1.2 ! root       44: #define STARTFILE_SPEC "%{p:pinit1.o%s}%{!p:%{msystem-v:vinit1.o%s}%{!msystem-v:init1.o%s}}"
1.1       root       45: 
                     46: #undef ENDFILE_SPEC
1.1.1.2 ! root       47: #define ENDFILE_SPEC "%{p:_etext.o%s}%{!p:initn.o%s}"
1.1       root       48: 
1.1.1.2 ! root       49: /* Override the svr3 versions. */
1.1       root       50: 
                     51: #undef WCHAR_TYPE
                     52: #define WCHAR_TYPE "int"
                     53: 
                     54: #undef PTRDIFF_TYPE
                     55: #define PTRDIFF_TYPE "long int"
                     56: 
1.1.1.2 ! root       57: /* We want to output DBX (stabs) debugging information normally.  */
1.1       root       58: 
                     59: #define DBX_DEBUGGING_INFO
1.1.1.2 ! root       60: #undef PREFERRED_DEBUGGING_TYPE
1.1       root       61: #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
                     62: 
1.1.1.2 ! root       63: /* It is convenient to be able to generate standard coff debugging
        !            64:    if requested via -gcoff. */
1.1       root       65: 
                     66: #define SDB_DEBUGGING_INFO
                     67: 
1.1.1.2 ! root       68: /* Be function-relative for block and source line stab directives. */
        !            69: 
        !            70: #define DBX_BLOCKS_FUNCTION_RELATIVE 1
        !            71: 
        !            72: /* but, to make this work, functions must appear prior to line info */
        !            73: 
        !            74: #define DBX_FUNCTION_FIRST
1.1       root       75: 
1.1.1.2 ! root       76: /* Generate a blank trailing N_SO to mark the end of the .o file, since
        !            77:    we can't depend upon the linker to mark .o file boundaries with
        !            78:    embedded stabs.  */
        !            79: 
        !            80: #define DBX_OUTPUT_MAIN_SOURCE_FILE_END(FILE, FILENAME)                        \
        !            81:   fprintf (FILE,                                                       \
        !            82:           "\t.text\n\t.stabs \"\",%d,0,0,Letext\nLetext:\n", N_SO)
        !            83: 
        !            84: #undef  ASM_OUTPUT_SOURCE_LINE
        !            85: #define ASM_OUTPUT_SOURCE_LINE(file, line)             \
        !            86:   { static int sym_lineno = 1;                         \
        !            87:     fprintf (file, ".stabn 68,0,%d,.LM%d-",            \
        !            88:             line, sym_lineno);                         \
        !            89:     assemble_name (file,                               \
        !            90:                   XSTR (XEXP (DECL_RTL (current_function_decl), 0), 0)); \
        !            91:     fprintf (file, "\n.LM%d:\n", sym_lineno);          \
        !            92:     sym_lineno += 1; }
1.1       root       93: 
                     94: /* Handle #pragma pack and sometimes #pragma weak.  */
                     95: 
                     96: #define HANDLE_SYSV_PRAGMA
                     97: 
1.1.1.2 ! root       98: /* Some additional command-line options. */
        !            99: 
1.1       root      100: #define TARGET_THREADS (target_flags & MASK_THREADS)
                    101: #define MASK_THREADS   0x40000000
                    102: 
                    103: #define TARGET_POSIX   (target_flags & MASK_POSIX)
                    104: #define MASK_POSIX     0x20000000
                    105: 
                    106: #define TARGET_SYSTEM_V        (target_flags & MASK_SYSTEM_V)
                    107: #define MASK_SYSTEM_V  0x10000000
                    108: 
                    109: #undef SUBTARGET_SWITCHES
                    110: #define SUBTARGET_SWITCHES \
                    111:     {"threads",                MASK_THREADS},          \
                    112:     {"posix",          MASK_POSIX},            \
1.1.1.2 ! root      113:     {"system-v",       MASK_SYSTEM_V},
1.1       root      114: 
                    115: #undef SUBTARGET_OVERRIDE_OPTIONS
                    116: #define SUBTARGET_OVERRIDE_OPTIONS \
                    117: { if (TARGET_SYSTEM_V && profile_flag)                 \
                    118:     warning ("-msystem-v and -p are incompatible");            \
                    119:   if (TARGET_SYSTEM_V && TARGET_THREADS)                       \
                    120:     warning ("-msystem-v and -mthreads are incompatible"); }
                    121: 
1.1.1.2 ! root      122: /* Define this so that C++ destructors will use atexit, since LynxOS
        !           123:    calls exit after main returns.  */
1.1       root      124: 
                    125: #define HAVE_ATEXIT
                    126: 
1.1.1.2 ! root      127: /* Since init.o et al put all sorts of stuff into the init section,
        !           128:    we can't use the standard init section support in crtbegin.o. */
1.1       root      129: 
1.1.1.2 ! root      130: #undef INIT_SECTION_ASM_OP
1.1       root      131: 
1.1.1.2 ! root      132: #undef EXTRA_SECTIONS
        !           133: #define EXTRA_SECTIONS in_const, in_bss, in_ctors, in_dtors, in_fini,
1.1       root      134: 
1.1.1.2 ! root      135: #undef EXTRA_SECTION_FUNCTIONS
        !           136: #define EXTRA_SECTION_FUNCTIONS                                        \
        !           137:   CONST_SECTION_FUNCTION                                       \
        !           138:   BSS_SECTION_FUNCTION                                         \
        !           139:   CTORS_SECTION_FUNCTION                                       \
        !           140:   DTORS_SECTION_FUNCTION                                       \
        !           141:   FINI_SECTION_FUNCTION
        !           142: 
        !           143: #undef CTORS_SECTION_ASM_OP
        !           144: #define CTORS_SECTION_ASM_OP   ".section\t.ctors"
        !           145: #undef DTORS_SECTION_ASM_OP
        !           146: #define DTORS_SECTION_ASM_OP   ".section\t.dtors"
        !           147: 
        !           148: #define INT_ASM_OP             ".long"
        !           149: 
        !           150: /* A C statement (sans semicolon) to output an element in the table of
        !           151:    global constructors.  */
        !           152: #undef ASM_OUTPUT_CONSTRUCTOR
        !           153: #define ASM_OUTPUT_CONSTRUCTOR(FILE,NAME)                              \
        !           154:   do {                                                                 \
        !           155:     ctors_section ();                                                  \
        !           156:     fprintf (FILE, "\t%s\t ", INT_ASM_OP);                             \
        !           157:     assemble_name (FILE, NAME);                                                \
        !           158:     fprintf (FILE, "\n");                                              \
        !           159:   } while (0)
        !           160: 
        !           161: /* A C statement (sans semicolon) to output an element in the table of
        !           162:    global destructors.  */
        !           163: #undef ASM_OUTPUT_DESTRUCTOR
        !           164: #define ASM_OUTPUT_DESTRUCTOR(FILE,NAME)                                       \
        !           165:   do {                                                                 \
        !           166:     dtors_section ();                                                  \
        !           167:     fprintf (FILE, "\t%s\t ", INT_ASM_OP);                             \
        !           168:     assemble_name (FILE, NAME);                                        \
        !           169:     fprintf (FILE, "\n");                                              \
        !           170:   } while (0)
1.1       root      171: 
1.1.1.2 ! root      172: #undef DO_GLOBAL_CTORS_BODY
        !           173: #undef DO_GLOBAL_DTORS_BODY

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