gcc/config/linux.h

   1 /* Definitions for Linux-based GNU systems with ELF format
   2    Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000 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 /* GNU/Linux uses ctype from glibc.a. I am not sure how complete it is.
  27    For now, we play safe. It may change later. */
  28
  29 #if 0
  30 #undef MULTIBYTE_CHARS
  31 #define MULTIBYTE_CHARS 1
  32 #endif
  33
  34 #undef ASM_APP_ON
  35 #define ASM_APP_ON "#APP\n"
  36
  37 #undef ASM_APP_OFF
  38 #define ASM_APP_OFF "#NO_APP\n"
  39
  40 /* Use stabs instead of DWARF debug format.  */
  41 #undef PREFERRED_DEBUGGING_TYPE
  42 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
  43
  44 #undef MD_EXEC_PREFIX
  45 #undef MD_STARTFILE_PREFIX
  46
  47 /* Provide a STARTFILE_SPEC appropriate for GNU/Linux.  Here we add
  48    the GNU/Linux magical crtbegin.o file (see crtstuff.c) which
  49    provides part of the support for getting C++ file-scope static
  50    object constructed before entering `main'. */
  51
  52 #undef  STARTFILE_SPEC
  53 #define STARTFILE_SPEC \
  54   "%{!shared: \
  55      %{pg:gcrt1.o%s} %{!pg:%{p:gcrt1.o%s} \
  56                        %{!p:%{profile:gcrt1.o%s} \
  57                          %{!profile:crt1.o%s}}}} \
  58    crti.o%s %{!shared:crtbegin.o%s} %{shared:crtbeginS.o%s}"
  59
  60 /* Provide a ENDFILE_SPEC appropriate for GNU/Linux.  Here we tack on
  61    the GNU/Linux magical crtend.o file (see crtstuff.c) which
  62    provides part of the support for getting C++ file-scope static
  63    object constructed before entering `main', followed by a normal
  64    GNU/Linux "finalizer" file, `crtn.o'.  */
  65
  66 #undef  ENDFILE_SPEC
  67 #define ENDFILE_SPEC \
  68   "%{!shared:crtend.o%s} %{shared:crtendS.o%s} crtn.o%s"
  69
  70 /* This is for -profile to use -lc_p instead of -lc. */
  71 #ifndef CC1_SPEC
  72 #define CC1_SPEC "%{profile:-p}"
  73 #endif
  74
  75 /* The GNU C++ standard library requires that these macros be defined.  */
  76 #undef CPLUSPLUS_CPP_SPEC
  77 #define CPLUSPLUS_CPP_SPEC "-D_GNU_SOURCE %(cpp)"
  78
  79 #undef  LIB_SPEC
  80 /* We no longer link with libc_p.a or libg.a by default. If you
  81    want to profile or debug the GNU/Linux C library, please add
  82    -profile or -ggdb to LDFLAGS at the link time, respectively. */
  83 #if 1
  84 #ifdef USE_GNULIBC_1
  85 #define LIB_SPEC \
  86   "%{!shared: %{p:-lgmon} %{pg:-lgmon} %{profile:-lgmon -lc_p} \
  87      %{!profile:%{!ggdb:-lc} %{ggdb:-lg}}}"
  88 #else
  89 #define LIB_SPEC \
  90   "%{shared: -lc} \
  91    %{!shared: %{mieee-fp:-lieee} %{pthread:-lpthread} \
  92         %{profile:-lc_p} %{!profile: -lc}}"
  93 #endif
  94 #else
  95 #define LIB_SPEC \
  96   "%{!shared: \
  97      %{p:-lgmon -lc_p} %{pg:-lgmon -lc_p} \
  98        %{!p:%{!pg:%{!g*:-lc} %{g*:-lg}}}}"
  99 #endif
 100
 101 /* Define this so we can compile MS code for use with WINE.  */
 102 #define HANDLE_PRAGMA_PACK_PUSH_POP