gcc/config/arm/linux-elf.h

   1 /* Definitions for ARM running Linux-based GNU systems using ELF
   2    Copyright (C) 1993, 1994, 1997, 1998, 1999, 2000, 2001
   3    Free Software Foundation, Inc.
   4    Contributed by Philip Blundell <philb@gnu.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 this program; 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 /* elfos.h should have already been included.  Now just override
  24    any conflicting definitions and add any extras.  */
  25
  26 /* Run-time Target Specification.  */
  27 #undef  TARGET_VERSION
  28 #define TARGET_VERSION  fputs (" (ARM GNU/Linux with ELF)", stderr);
  29
  30 /* Do not assume anything about header files.  */
  31 #define NO_IMPLICIT_EXTERN_C
  32
  33 /* Default is to use APCS-32 mode.  */
  34 #undef  TARGET_DEFAULT
  35 #define TARGET_DEFAULT (ARM_FLAG_APCS_32 | ARM_FLAG_MMU_TRAPS)
  36
  37 #define SUBTARGET_EXTRA_LINK_SPEC " -m armelf_linux -p"
  38
  39 #undef  MULTILIB_DEFAULTS
  40 #define MULTILIB_DEFAULTS \
  41         { "marm", "mlittle-endian", "mhard-float", "mapcs-32", "mno-thumb-interwork" }
  42
  43 #define CPP_APCS_PC_DEFAULT_SPEC "-D__APCS_32__"
  44
  45 /* Now we define the strings used to build the spec file.  */
  46 #define LIB_SPEC \
  47   "%{shared: -lc} \
  48    %{!shared: %{pthread:-lpthread} \
  49    %{profile:-lc_p} %{!profile: -lc}}"
  50
  51 #define LIBGCC_SPEC "%{msoft-float:-lfloat} -lgcc"
  52
  53 /* Provide a STARTFILE_SPEC appropriate for GNU/Linux.  Here we add
  54    the GNU/Linux magical crtbegin.o file (see crtstuff.c) which
  55    provides part of the support for getting C++ file-scope static
  56    object constructed before entering `main'. */
  57
  58 #undef  STARTFILE_SPEC
  59 #define STARTFILE_SPEC \
  60   "%{!shared: \
  61      %{pg:gcrt1.o%s} %{!pg:%{p:gcrt1.o%s} \
  62                        %{!p:%{profile:gcrt1.o%s} \
  63                          %{!profile:crt1.o%s}}}} \
  64    crti.o%s %{!shared:crtbegin.o%s} %{shared:crtbeginS.o%s}"
  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 #undef  LINK_SPEC
  77 #define LINK_SPEC "%{h*} %{version:-v} \
  78    %{b} %{Wl,*:%*} \
  79    %{static:-Bstatic} \
  80    %{shared:-shared} \
  81    %{symbolic:-Bsymbolic} \
  82    %{rdynamic:-export-dynamic} \
  83    %{!dynamic-linker:-dynamic-linker /lib/ld-linux.so.2} \
  84    -X \
  85    %{mbig-endian:-EB}" \
  86    SUBTARGET_EXTRA_LINK_SPEC
  87
  88 #undef  CPP_PREDEFINES
  89 #define CPP_PREDEFINES \
  90 "-Dunix -Dlinux -D__ELF__ \
  91 -Asystem=unix -Asystem=posix"
  92
  93 /* Allow #sccs in preprocessor.  */
  94 #define SCCS_DIRECTIVE
  95
  96 /* This is how we tell the assembler that two symbols have the same value.  */
  97 #define ASM_OUTPUT_DEF(FILE, NAME1, NAME2) \
  98   do                                       \
  99     {                                      \
 100       assemble_name (FILE, NAME1);         \
 101       fputs (" = ", FILE);                 \
 102       assemble_name (FILE, NAME2);         \
 103       fputc ('\n', FILE);                  \
 104     }                                      \
 105   while (0)
 106
 107 /* NWFPE always understands FPA instructions.  */
 108 #undef  FP_DEFAULT
 109 #define FP_DEFAULT FP_SOFT3
 110
 111 /* Call the function profiler with a given profile label.  */
 112 #undef  ARM_FUNCTION_PROFILER
 113 #define ARM_FUNCTION_PROFILER(STREAM, LABELNO)                          \
 114 {                                                                       \
 115   fprintf (STREAM, "\tbl\tmcount%s\n", NEED_PLT_RELOC ? "(PLT)" : "");  \
 116 }
 117
 118 #undef  CC1_SPEC
 119 #define CC1_SPEC "%{profile:-p}"