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1 /* Configuration file for Symbian OS on ARM processors.
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2 Copyright (C) 2004, 2005, 2007, 2008
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3 Free Software Foundation, Inc.
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4 Contributed by CodeSourcery, LLC
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5
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6 This file is part of GCC.
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7
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8 GCC is free software; you can redistribute it and/or modify it
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9 under the terms of the GNU General Public License as published
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10 by the Free Software Foundation; either version 3, or (at your
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11 option) any later version.
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12
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13 GCC is distributed in the hope that it will be useful, but WITHOUT
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14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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15 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
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16 License for more details.
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17
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18 You should have received a copy of the GNU General Public License
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19 along with GCC; see the file COPYING3. If not see
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20 <http://www.gnu.org/licenses/>. */
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21
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22 /* Do not expand builtin functions (unless explicitly prefixed with
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23 "__builtin"). Symbian OS code relies on properties of the standard
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24 library that go beyond those guaranteed by the ANSI/ISO standard.
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25 For example, "memcpy" works even with overlapping memory, like
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26 "memmove". We cannot simply set flag_no_builtin in arm.c because
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27 (a) flag_no_builtin is not declared in language-independent code,
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28 and (b) that would prevent users from explicitly overriding the
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29 default with -fbuiltin, which may sometimes be useful.
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30
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31 Make all symbols hidden by default. Symbian OS expects that all
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32 exported symbols will be explicitly marked with
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33 "__declspec(dllexport)".
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34
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35 Enumeration types use 4 bytes, even if the enumerals are small,
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36 unless explicitly overridden.
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37
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38 The wchar_t type is a 2-byte type, unless explicitly
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39 overridden. */
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40 #define CC1_SPEC \
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41 "%{!fbuiltin:%{!fno-builtin:-fno-builtin}} " \
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42 "%{!fvisibility=*:-fvisibility=hidden} " \
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43 "%{!fshort-enums:%{!fno-short-enums:-fno-short-enums}} " \
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44 "%{!fshort-wchar:%{!fno-short-wchar:-fshort-wchar}} "
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45 #define CC1PLUS_SPEC CC1_SPEC
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46
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47 /* Symbian OS does not use crt*.o, unlike the generic unknown-elf
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48 configuration. */
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49 #undef STARTFILE_SPEC
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50 #define STARTFILE_SPEC ""
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51
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52 #undef ENDFILE_SPEC
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53 #define ENDFILE_SPEC ""
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54
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55 /* Do not link with any libraries by default. On Symbian OS, the user
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56 must supply all required libraries on the command line. */
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57 #undef LIB_SPEC
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58 #define LIB_SPEC ""
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59
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60 /* Support the "dllimport" attribute. */
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61 #define TARGET_DLLIMPORT_DECL_ATTRIBUTES 1
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62
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63 /* Symbian OS assumes ARM V5 or above. Since -march=armv5 is
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64 equivalent to making the ARM 10TDMI core the default, we can set
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65 SUBTARGET_CPU_DEFAULT and get an equivalent effect. */
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66 #undef SUBTARGET_CPU_DEFAULT
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67 #define SUBTARGET_CPU_DEFAULT TARGET_CPU_arm10tdmi
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68
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69 /* The assembler should assume VFP FPU format, and armv5t. */
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70 #undef SUBTARGET_ASM_FLOAT_SPEC
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71 #define SUBTARGET_ASM_FLOAT_SPEC \
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72 "%{!mfpu=*:-mfpu=vfp} %{!mcpu=*:%{!march=*:-march=armv5t}}"
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73
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74 /* SymbianOS provides the BPABI routines in a separate library.
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75 Therefore, we do not need to define any of them in libgcc. */
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76 #undef RENAME_LIBRARY
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77 #define RENAME_LIBRARY(GCC_NAME, AEABI_NAME) /* empty */
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78
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79 /* Define the __symbian__ macro. */
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80 #undef TARGET_OS_CPP_BUILTINS
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81 #define TARGET_OS_CPP_BUILTINS() \
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82 do \
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83 { \
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84 /* Include the default BPABI stuff. */ \
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85 TARGET_BPABI_CPP_BUILTINS (); \
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86 /* Symbian OS does not support merging symbols across DLL \
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87 boundaries. */ \
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88 builtin_define ("__GXX_MERGED_TYPEINFO_NAMES=0"); \
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89 builtin_define ("__symbian__"); \
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90 } \
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91 while (false)
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92
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93 /* On SymbianOS, these sections are not writable, so we use "a",
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94 rather than "aw", for the section attributes. */
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95 #undef ARM_EABI_CTORS_SECTION_OP
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96 #define ARM_EABI_CTORS_SECTION_OP \
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97 "\t.section\t.init_array,\"a\",%init_array"
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98 #undef ARM_EABI_DTORS_SECTION_OP
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99 #define ARM_EABI_DTORS_SECTION_OP \
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100 "\t.section\t.fini_array,\"a\",%fini_array"
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101
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102 /* SymbianOS cannot merge entities with vague linkage at runtime. */
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103 #define TARGET_ARM_DYNAMIC_VAGUE_LINKAGE_P false
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104
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105 #define TARGET_DEFAULT_WORD_RELOCATIONS 1
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