gcc/config/arm/symbian.h

   1 /* Configuration file for Symbian OS on ARM processors.
   2    Copyright (C) 2004
   3    Free Software Foundation, Inc.
   4    Contributed by CodeSourcery, LLC
   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
  20    the Free Software Foundation, 59 Temple Place - Suite 330,
  21    Boston, MA 02111-1307, USA.  */
  22
  23 /* Do not expand builtin functions (unless explicitly prefixed with
  24    "__builtin").  Symbian OS code relies on properties of the standard
  25    library that go beyond those guaranteed by the ANSI/ISO standard.
  26    For example, "memcpy" works even with overlapping memory, like
  27    "memmove".  We cannot simply set flag_no_builtin in arm.c because
  28    (a) flag_no_builtin is not declared in language-independent code,
  29    and (b) that would prevent users from explicitly overriding the
  30    default with -fbuiltin, which may sometimes be useful.
  31
  32    Make all symbols hidden by default.  Symbian OS expects that all
  33    exported symbols will be explicitly marked with
  34    "__declspec(dllexport)".
  35
  36    Enumeration types use 4 bytes, even if the enumerals are small,
  37    unless explicitly overridden.
  38
  39    The wchar_t type is a 2-byte type, unless explicitly
  40    overridden.  */
  41 #define CC1_SPEC                                                \
  42   "%{!fbuiltin:%{!fno-builtin:-fno-builtin}} "                  \
  43   "%{!fvisibility=*:-fvisibility=hidden} "                      \
  44   "%{!fshort-enums:%{!fno-short-enums:-fno-short-enums}} "      \
  45   "%{!fshort-wchar:%{!fno-short-wchar:-fshort-wchar}} "
  46 #define CC1PLUS_SPEC CC1_SPEC
  47
  48 /* Symbian OS does not use crt0.o, unlike the generic unknown-elf
  49    configuration.  */
  50 #undef STARTFILE_SPEC
  51 #define STARTFILE_SPEC "crti%O%s crtbegin%O%s"
  52
  53 /* Support the "dllimport" attribute.  */
  54 #define TARGET_DLLIMPORT_DECL_ATTRIBUTES 1
  55
  56 /* Symbian OS assumes ARM V5 or above.  Since -march=armv5 is
  57    equivalent to making the ARM 10TDMI core the default, we can set
  58    SUBTARGET_CPU_DEFAULT and get an equivalent effect.  */
  59 #undef SUBTARGET_CPU_DEFAULT
  60 #define SUBTARGET_CPU_DEFAULT TARGET_CPU_arm10tdmi
  61
  62 /* The assembler should assume VFP FPU format, and armv5t.  */
  63 #undef SUBTARGET_ASM_FLOAT_SPEC
  64 #define SUBTARGET_ASM_FLOAT_SPEC \
  65   "%{!mfpu=*:-mfpu=vfp} %{!mcpu=*:%{!march=*:-march=armv5t}}"
  66
  67 /* SymbianOS provides the BPABI routines in a separate library.
  68    Therefore, we do not need to define any of them in libgcc.  */
  69 #undef RENAME_LIBRARY
  70 #define RENAME_LIBRARY(GCC_NAME, AEABI_NAME) /* empty */
  71
  72 /* Define the __symbian__ macro.  */
  73 #define TARGET_OS_CPP_BUILTINS()                \
  74   do                                            \
  75     {                                           \
  76       builtin_define ("__symbian__");           \
  77     }                                           \
  78   while (false)