1 /* Configuration file for Symbian OS on ARM processors. 2 Copyright (C) 2004, 2005, 2007, 2008 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 3, 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 COPYING3. If not see 20 <http://www.gnu.org/licenses/>. */ 21 22 /* Do not expand builtin functions (unless explicitly prefixed with 23 "__builtin"). Symbian OS code relies on properties of the standard 24 library that go beyond those guaranteed by the ANSI/ISO standard. 25 For example, "memcpy" works even with overlapping memory, like 26 "memmove". We cannot simply set flag_no_builtin in arm.c because 27 (a) flag_no_builtin is not declared in language-independent code, 28 and (b) that would prevent users from explicitly overriding the 29 default with -fbuiltin, which may sometimes be useful. 30 31 Make all symbols hidden by default. Symbian OS expects that all 32 exported symbols will be explicitly marked with 33 "__declspec(dllexport)". 34 35 Enumeration types use 4 bytes, even if the enumerals are small, 36 unless explicitly overridden. 37 38 The wchar_t type is a 2-byte type, unless explicitly 39 overridden. */ 40 #define CC1_SPEC \ 41 "%{!fbuiltin:%{!fno-builtin:-fno-builtin}} " \ 42 "%{!fvisibility=*:-fvisibility=hidden} " \ 43 "%{!fshort-enums:%{!fno-short-enums:-fno-short-enums}} " \ 44 "%{!fshort-wchar:%{!fno-short-wchar:-fshort-wchar}} " 45 #define CC1PLUS_SPEC CC1_SPEC 46 47 /* Symbian OS does not use crt*.o, unlike the generic unknown-elf 48 configuration. */ 49 #undef STARTFILE_SPEC 50 #define STARTFILE_SPEC "" 51 52 #undef ENDFILE_SPEC 53 #define ENDFILE_SPEC "" 54 55 /* Do not link with any libraries by default. On Symbian OS, the user 56 must supply all required libraries on the command line. */ 57 #undef LIB_SPEC 58 #define LIB_SPEC "" 59 60 /* Support the "dllimport" attribute. */ 61 #define TARGET_DLLIMPORT_DECL_ATTRIBUTES 1 62 63 /* Symbian OS assumes ARM V5 or above. Since -march=armv5 is 64 equivalent to making the ARM 10TDMI core the default, we can set 65 SUBTARGET_CPU_DEFAULT and get an equivalent effect. */ 66 #undef SUBTARGET_CPU_DEFAULT 67 #define SUBTARGET_CPU_DEFAULT TARGET_CPU_arm10tdmi 68 69 /* The assembler should assume VFP FPU format, and armv5t. */ 70 #undef SUBTARGET_ASM_FLOAT_SPEC 71 #define SUBTARGET_ASM_FLOAT_SPEC \ 72 "%{!mfpu=*:-mfpu=vfp} %{!mcpu=*:%{!march=*:-march=armv5t}}" 73 74 /* SymbianOS provides the BPABI routines in a separate library. 75 Therefore, we do not need to define any of them in libgcc. */ 76 #undef RENAME_LIBRARY 77 #define RENAME_LIBRARY(GCC_NAME, AEABI_NAME) /* empty */ 78 79 /* Define the __symbian__ macro. */ 80 #undef TARGET_OS_CPP_BUILTINS 81 #define TARGET_OS_CPP_BUILTINS() \ 82 do \ 83 { \ 84 /* Include the default BPABI stuff. */ \ 85 TARGET_BPABI_CPP_BUILTINS (); \ 86 /* Symbian OS does not support merging symbols across DLL \ 87 boundaries. */ \ 88 builtin_define ("__GXX_MERGED_TYPEINFO_NAMES=0"); \ 89 builtin_define ("__symbian__"); \ 90 } \ 91 while (false) 92 93 /* On SymbianOS, these sections are not writable, so we use "a", 94 rather than "aw", for the section attributes. */ 95 #undef ARM_EABI_CTORS_SECTION_OP 96 #define ARM_EABI_CTORS_SECTION_OP \ 97 "\t.section\t.init_array,\"a\",%init_array" 98 #undef ARM_EABI_DTORS_SECTION_OP 99 #define ARM_EABI_DTORS_SECTION_OP \ 100 "\t.section\t.fini_array,\"a\",%fini_array" 101 102 /* SymbianOS cannot merge entities with vague linkage at runtime. */ 103 #define TARGET_ARM_DYNAMIC_VAGUE_LINKAGE_P false 104 105 #define TARGET_DEFAULT_WORD_RELOCATIONS 1 106