gcc/config/rs6000/beos.h

   1 /* Definitions of target machine for GNU compiler, for BeOS.
   2    Copyright (C) 1997, 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
   3    Contributed by Fred Fish (fnf@cygnus.com), based on aix41.h
   4    from David Edelsohn (edelsohn@npac.syr.edu).
   5
   6    This file is part of GCC.
   7
   8    GCC is free software; you can redistribute it and/or modify it
   9    under the terms of the GNU General Public License as published
  10    by the Free Software Foundation; either version 2, or (at your
  11    option) any later version.
  12
  13    GCC is distributed in the hope that it will be useful, but WITHOUT
  14    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  15    or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
  16    License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with GCC; see the file COPYING.  If not, write to the
  20    Free Software Foundation, 59 Temple Place - Suite 330, Boston,
  21    MA 02111-1307, USA.  */
  22
  23 #undef  TARGET_VERSION
  24 #define TARGET_VERSION fprintf (stderr, " (BeOS/PowerPC)");
  25
  26 /* Enable AIX XL compiler calling convention breakage compatibility.  */
  27 #define MASK_XL_CALL            0x40000000
  28 #define TARGET_XL_CALL          (target_flags & MASK_XL_CALL)
  29 #undef  SUBTARGET_SWITCHES
  30 #define SUBTARGET_SWITCHES              \
  31   {"xl-call",           MASK_XL_CALL,                                   \
  32    N_("Always pass floating-point arguments in memory") },              \
  33   {"no-xl-call",        - MASK_XL_CALL,                                 \
  34    N_("Don't always pass floating-point arguments in memory") },        \
  35   {"threads",           0},                                             \
  36   {"pe",                0},
  37
  38 #undef ASM_SPEC
  39 #define ASM_SPEC "-u %(asm_cpu)"
  40
  41 #undef TARGET_OS_CPP_BUILTINS
  42 /* __POWERPC__ must be defined for some header files.  */
  43 #define TARGET_OS_CPP_BUILTINS()          \
  44   do                                      \
  45     {                                     \
  46       builtin_define ("__BEOS__");        \
  47       builtin_define ("__POWERPC__");     \
  48       builtin_assert ("system=beos");     \
  49       builtin_assert ("cpu=powerpc");     \
  50       builtin_assert ("machine=powerpc"); \
  51     }                                     \
  52   while (0)
  53
  54 #undef CPP_SPEC
  55 #define CPP_SPEC "%{posix: -D_POSIX_SOURCE}"
  56
  57 /* This is the easiest way to disable use of gcc's builtin alloca,
  58    which in the current BeOS release (DR9) is a problem because of the
  59    relatively low default stack size of 256K with no way to expand it.
  60    So anything we compile for the BeOS target should not use the
  61    builtin alloca.  This also has the unwanted side effect of
  62    disabling all builtin functions though.  */
  63
  64 #undef CC1_SPEC
  65 #define CC1_SPEC "%{!fbuiltin: -fno-builtin}"
  66 #undef CC1PLUS_SPEC
  67 #define CC1PLUS_SPEC "%{!fbuiltin: -fno-builtin}"
  68
  69 #undef  ASM_DEFAULT_SPEC
  70 #define ASM_DEFAULT_SPEC "-mppc"
  71
  72 #undef TARGET_DEFAULT
  73 #define TARGET_DEFAULT (MASK_POWERPC | MASK_NEW_MNEMONICS)
  74
  75 #undef PROCESSOR_DEFAULT
  76 #define PROCESSOR_DEFAULT PROCESSOR_PPC603
  77
  78 /* Define this macro as a C expression for the initializer of an
  79    array of string to tell the driver program which options are
  80    defaults for this target and thus do not need to be handled
  81    specially when using `MULTILIB_OPTIONS'.
  82
  83    Do not define this macro if `MULTILIB_OPTIONS' is not defined in
  84    the target makefile fragment or if none of the options listed in
  85    `MULTILIB_OPTIONS' are set by default.  *Note Target Fragment::.  */
  86
  87 #undef  MULTILIB_DEFAULTS
  88 #define MULTILIB_DEFAULTS { "mcpu=powerpc" }
  89
  90 /* These empty definitions get rid of the attempt to link in crt0.o
  91    and any libraries like libc.a.
  92    On BeOS the ld executable is actually a linker front end that first runs
  93    the GNU linker with the -r option to generate a relocatable XCOFF output
  94    file, and then runs Metrowork's linker (mwld) to generate a fully linked
  95    executable.  */
  96
  97 #undef LIB_SPEC
  98 #define LIB_SPEC ""
  99
 100 #undef LINK_SPEC
 101 #define LINK_SPEC ""
 102
 103 #undef STARTFILE_SPEC
 104 #define STARTFILE_SPEC ""
 105
 106 /* Text to write out after a CALL that may be replaced by glue code by
 107    the loader.  */
 108
 109 #undef RS6000_CALL_GLUE
 110 #define RS6000_CALL_GLUE "cror 15,15,15"
 111
 112 /* Struct alignments are done on 4 byte boundaries for all types.  */
 113 #undef BIGGEST_FIELD_ALIGNMENT
 114 #define BIGGEST_FIELD_ALIGNMENT 32
 115
 116 /* STANDARD_INCLUDE_DIR is the equivalent of "/usr/include" on UNIX.  */
 117 #define STANDARD_INCLUDE_DIR    "/boot/develop/headers/posix"
 118
 119 /* SYSTEM_INCLUDE_DIR is the location for system specific, non-POSIX headers.  */
 120 #define SYSTEM_INCLUDE_DIR      "/boot/develop/headers/be"