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 #undef MD_EXEC_PREFIX
  41 #undef MD_STARTFILE_PREFIX
  42
  43 /* Provide a STARTFILE_SPEC appropriate for GNU/Linux.  Here we add
  44    the GNU/Linux magical crtbegin.o file (see crtstuff.c) which
  45    provides part of the support for getting C++ file-scope static
  46    object constructed before entering `main'.  */
  47
  48 #undef  STARTFILE_SPEC
  49 #ifdef USE_GNULIBC_1
  50 #define STARTFILE_SPEC \
  51   "%{!shared: \
  52      %{pg:gcrt1.o%s} %{!pg:%{p:gcrt1.o%s} \
  53                        %{!p:%{profile:gcrt1.o%s} \
  54                          %{!profile:crt1.o%s}}}} \
  55    crti.o%s %{!shared:crtbegin.o%s} %{shared:crtbeginS.o%s}"
  56 #else
  57 #define STARTFILE_SPEC \
  58   "%{!shared: \
  59      %{pg:gcrt1.o%s} %{!pg:%{p:gcrt1.o%s} \
  60                        %{!p:%{profile:gcrt1.o%s} \
  61                          %{!profile:crt1.o%s}}}} \
  62    crti.o%s %{static:crtbeginT.o%s}\
  63    %{!static:%{!shared:crtbegin.o%s} %{shared:crtbeginS.o%s}}"
  64 #endif
  65
  66 /* Provide a ENDFILE_SPEC appropriate for GNU/Linux.  Here we tack on
  67    the GNU/Linux magical crtend.o file (see crtstuff.c) which
  68    provides part of the support for getting C++ file-scope static
  69    object constructed before entering `main', followed by a normal
  70    GNU/Linux "finalizer" file, `crtn.o'.  */
  71
  72 #undef  ENDFILE_SPEC
  73 #define ENDFILE_SPEC \
  74   "%{!shared:crtend.o%s} %{shared:crtendS.o%s} crtn.o%s"
  75
  76 /* This is for -profile to use -lc_p instead of -lc.  */
  77 #ifndef CC1_SPEC
  78 #define CC1_SPEC "%{profile:-p}"
  79 #endif
  80
  81 /* The GNU C++ standard library requires that these macros be defined.  */
  82 #undef CPLUSPLUS_CPP_SPEC
  83 #define CPLUSPLUS_CPP_SPEC "-D_GNU_SOURCE %(cpp)"
  84
  85 #undef  LIB_SPEC
  86 /* We no longer link with libc_p.a or libg.a by default. If you
  87    want to profile or debug the GNU/Linux C library, please add
  88    -profile or -ggdb to LDFLAGS at the link time, respectively.  */
  89 #if 1
  90 #ifdef USE_GNULIBC_1
  91 #define LIB_SPEC \
  92   "%{!shared: %{p:-lgmon} %{pg:-lgmon} %{profile:-lgmon -lc_p} \
  93      %{!profile:%{!ggdb:-lc} %{ggdb:-lg}}}"
  94 #else
  95 #define LIB_SPEC \
  96   "%{pthread:-lpthread} \
  97    %{shared:-lc} \
  98    %{!shared:%{mieee-fp:-lieee} %{profile:-lc_p}%{!profile:-lc}}"
  99 #endif
 100 #else
 101 #define LIB_SPEC \
 102   "%{!shared: \
 103      %{p:-lgmon -lc_p} %{pg:-lgmon -lc_p} \
 104        %{!p:%{!pg:%{!g*:-lc} %{g*:-lg}}}}"
 105 #endif
 106
 107 #if !defined(USE_GNULIBC_1) && defined(HAVE_LD_EH_FRAME_HDR)
 108 #define LINK_EH_SPEC "%{!static:--eh-frame-hdr} "
 109 #endif
 110
 111 /* Define this so we can compile MS code for use with WINE.  */
 112 #define HANDLE_PRAGMA_PACK_PUSH_POP
 113
 114
 115 /* Determine whether the the entire c99 runtime
 116    is present in the runtime library.  */
 117 #ifndef USE_GNULIBC_1
 118 #define TARGET_C99_FUNCTIONS 1
 119 #endif
 120
 121 #define TARGET_HAS_F_SETLKW