gcc/config/rs6000/beos.h

   1 /* Definitions of target machine for GNU compiler, for BeOS.
   2    Copyright (C) 1997, 2000, 2001, 2002, 2003, 2005, 2007
   3    Free Software Foundation, Inc.
   4    Contributed by Fred Fish (fnf@cygnus.com), based on aix41.h
   5    from David Edelsohn (edelsohn@npac.syr.edu).
   6
   7    This file is part of GCC.
   8
   9    GCC is free software; you can redistribute it and/or modify it
  10    under the terms of the GNU General Public License as published
  11    by the Free Software Foundation; either version 3, or (at your
  12    option) any later version.
  13
  14    GCC is distributed in the hope that it will be useful, but WITHOUT
  15    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  16    or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
  17    License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with GCC; see the file COPYING3.  If not see
  21    <http://www.gnu.org/licenses/>.  */
  22
  23 #undef  TARGET_VERSION
  24 #define TARGET_VERSION fprintf (stderr, " (BeOS/PowerPC)");
  25
  26 #undef ASM_SPEC
  27 #define ASM_SPEC "-u %(asm_cpu)"
  28
  29 #undef TARGET_OS_CPP_BUILTINS
  30 /* __POWERPC__ must be defined for some header files.  */
  31 #define TARGET_OS_CPP_BUILTINS()          \
  32   do                                      \
  33     {                                     \
  34       builtin_define ("__BEOS__");        \
  35       builtin_define ("__POWERPC__");     \
  36       builtin_assert ("system=beos");     \
  37       builtin_assert ("cpu=powerpc");     \
  38       builtin_assert ("machine=powerpc"); \
  39     }                                     \
  40   while (0)
  41
  42 #undef CPP_SPEC
  43 #define CPP_SPEC "%{posix: -D_POSIX_SOURCE}"
  44
  45 /* This is the easiest way to disable use of gcc's builtin alloca,
  46    which in the current BeOS release (DR9) is a problem because of the
  47    relatively low default stack size of 256K with no way to expand it.
  48    So anything we compile for the BeOS target should not use the
  49    builtin alloca.  This also has the unwanted side effect of
  50    disabling all builtin functions though.  */
  51
  52 #undef CC1_SPEC
  53 #define CC1_SPEC "%{!fbuiltin: -fno-builtin}"
  54 #undef CC1PLUS_SPEC
  55 #define CC1PLUS_SPEC "%{!fbuiltin: -fno-builtin}"
  56
  57 #undef  ASM_DEFAULT_SPEC
  58 #define ASM_DEFAULT_SPEC "-mppc"
  59
  60 #undef TARGET_DEFAULT
  61 #define TARGET_DEFAULT (MASK_POWERPC | MASK_NEW_MNEMONICS)
  62
  63 #undef PROCESSOR_DEFAULT
  64 #define PROCESSOR_DEFAULT PROCESSOR_PPC603
  65
  66 /* Define this macro as a C expression for the initializer of an
  67    array of string to tell the driver program which options are
  68    defaults for this target and thus do not need to be handled
  69    specially when using `MULTILIB_OPTIONS'.
  70
  71    Do not define this macro if `MULTILIB_OPTIONS' is not defined in
  72    the target makefile fragment or if none of the options listed in
  73    `MULTILIB_OPTIONS' are set by default.  *Note Target Fragment::.  */
  74
  75 #undef  MULTILIB_DEFAULTS
  76 #define MULTILIB_DEFAULTS { "mcpu=powerpc" }
  77
  78 /* These empty definitions get rid of the attempt to link in crt0.o
  79    and any libraries like libc.a.
  80    On BeOS the ld executable is actually a linker front end that first runs
  81    the GNU linker with the -r option to generate a relocatable XCOFF output
  82    file, and then runs Metrowork's linker (mwld) to generate a fully linked
  83    executable.  */
  84
  85 #undef LIB_SPEC
  86 #define LIB_SPEC ""
  87
  88 #undef LINK_SPEC
  89 #define LINK_SPEC ""
  90
  91 #undef STARTFILE_SPEC
  92 #define STARTFILE_SPEC ""
  93
  94 /* Text to write out after a CALL that may be replaced by glue code by
  95    the loader.  */
  96
  97 #undef RS6000_CALL_GLUE
  98 #define RS6000_CALL_GLUE "cror 15,15,15"
  99
 100 /* Struct alignments are done on 4 byte boundaries for all types.  */
 101 #undef BIGGEST_FIELD_ALIGNMENT
 102 #define BIGGEST_FIELD_ALIGNMENT 32
 103
 104 /* STANDARD_INCLUDE_DIR is the equivalent of "/usr/include" on UNIX.  */
 105 #define STANDARD_INCLUDE_DIR    "/boot/develop/headers/posix"
 106
 107 /* SYSTEM_INCLUDE_DIR is the location for system specific, non-POSIX headers.  */
 108 #define SYSTEM_INCLUDE_DIR      "/boot/develop/headers/be"