gcc/config/linux.h

   1 /* Definitions for Linux-based GNU systems with ELF format
   2    Copyright (C) 1995, 1996, 1997, 1998 Free Software Foundation, Inc.
   3    Contributed by Eric Youngdale.
   4    Modified for stabs-in-ELF by H.J. Lu (hjl@lucon.org).
   5
   6 This file is part of GNU CC.
   7
   8 GNU CC is free software; you can redistribute it and/or modify
   9 it under the terms of the GNU General Public License as published by
  10 the Free Software Foundation; either version 2, or (at your option)
  11 any later version.
  12
  13 GNU CC is distributed in the hope that it will be useful,
  14 but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 GNU General Public License for more details.
  17
  18 You should have received a copy of the GNU General Public License
  19 along with GNU CC; see the file COPYING.  If not, write to
  20 the Free Software Foundation, 59 Temple Place - Suite 330,
  21 Boston, MA 02111-1307, USA.  */
  22
  23 /* Don't assume anything about the header files. */
  24 #define NO_IMPLICIT_EXTERN_C
  25
  26 #undef HAVE_ATEXIT
  27 #define HAVE_ATEXIT
  28
  29 /* GNU/Linux uses ctype from glibc.a. I am not sure how complete it is.
  30    For now, we play safe. It may change later. */
  31
  32 #if 0
  33 #undef MULTIBYTE_CHARS
  34 #define MULTIBYTE_CHARS 1
  35 #endif
  36
  37 #undef ASM_APP_ON
  38 #define ASM_APP_ON "#APP\n"
  39
  40 #undef ASM_APP_OFF
  41 #define ASM_APP_OFF "#NO_APP\n"
  42
  43 #define SET_ASM_OP      ".set"
  44
  45 /* Use stabs instead of DWARF debug format.  */
  46 #undef PREFERRED_DEBUGGING_TYPE
  47 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
  48 #include "svr4.h"
  49
  50 #undef MD_EXEC_PREFIX
  51 #undef MD_STARTFILE_PREFIX
  52
  53 /* Output at beginning of assembler file.  */
  54 /* The .file command should always begin the output.  */
  55 #undef ASM_FILE_START
  56 #define ASM_FILE_START(FILE)                                            \
  57   do {                                                                  \
  58         output_file_directive (FILE, main_input_filename);              \
  59         fprintf (FILE, "\t.version\t\"01.01\"\n");                      \
  60   } while (0)
  61
  62 /* Provide a STARTFILE_SPEC appropriate for GNU/Linux.  Here we add
  63    the GNU/Linux magical crtbegin.o file (see crtstuff.c) which
  64    provides part of the support for getting C++ file-scope static
  65    object constructed before entering `main'. */
  66
  67 #undef  STARTFILE_SPEC
  68 #define STARTFILE_SPEC \
  69   "%{!shared: \
  70      %{pg:gcrt1.o%s} %{!pg:%{p:gcrt1.o%s} \
  71                        %{!p:%{profile:gcrt1.o%s} \
  72                          %{!profile:crt1.o%s}}}} \
  73    crti.o%s %{!shared:crtbegin.o%s} %{shared:crtbeginS.o%s}"
  74
  75 /* Provide a ENDFILE_SPEC appropriate for GNU/Linux.  Here we tack on
  76    the GNU/Linux magical crtend.o file (see crtstuff.c) which
  77    provides part of the support for getting C++ file-scope static
  78    object constructed before entering `main', followed by a normal
  79    GNU/Linux "finalizer" file, `crtn.o'.  */
  80
  81 #undef  ENDFILE_SPEC
  82 #define ENDFILE_SPEC \
  83   "%{!shared:crtend.o%s} %{shared:crtendS.o%s} crtn.o%s"
  84
  85 /* This is for -profile to use -lc_p instead of -lc. */
  86 #ifndef CC1_SPEC
  87 #define CC1_SPEC "%{profile:-p}"
  88 #endif
  89
  90 #ifndef USE_GNULIBC_1
  91 #undef DEFAULT_VTABLE_THUNKS
  92 #define DEFAULT_VTABLE_THUNKS 1
  93 #endif
  94
  95 #undef  LIB_SPEC
  96 /* We no longer link with libc_p.a or libg.a by default. If you
  97    want to profile or debug the GNU/Linux C library, please add
  98    -profile or -ggdb to LDFLAGS at the link time, respectively. */
  99 #if 1
 100 #ifdef USE_GNULIBC_1
 101 #define LIB_SPEC \
 102   "%{!shared: %{p:-lgmon} %{pg:-lgmon} %{profile:-lgmon -lc_p} \
 103      %{!profile:%{!ggdb:-lc} %{ggdb:-lg}}}"
 104 #else
 105 #define LIB_SPEC \
 106   "%{shared: -lc} \
 107    %{!shared: %{mieee-fp:-lieee} %{pthread:-lpthread} \
 108         %{profile:-lc_p} %{!profile: -lc}}"
 109 #endif
 110 #else
 111 #define LIB_SPEC \
 112   "%{!shared: \
 113      %{p:-lgmon -lc_p} %{pg:-lgmon -lc_p} \
 114        %{!p:%{!pg:%{!g*:-lc} %{g*:-lg}}}}"
 115 #endif