symbian.h revision 302408
1/* Configuration file for Symbian OS on ARM processors. 2 Copyright (C) 2004, 2005 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, 51 Franklin Street, Fifth Floor, 21 Boston, MA 02110-1301, 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 crt*.o, unlike the generic unknown-elf 49 configuration. */ 50#undef STARTFILE_SPEC 51#define STARTFILE_SPEC "" 52 53#undef ENDFILE_SPEC 54#define ENDFILE_SPEC "" 55 56/* Do not link with any libraries by default. On Symbian OS, the user 57 must supply all required libraries on the command line. */ 58#undef LIB_SPEC 59#define LIB_SPEC "" 60 61/* Support the "dllimport" attribute. */ 62#define TARGET_DLLIMPORT_DECL_ATTRIBUTES 1 63 64/* Symbian OS assumes ARM V5 or above. Since -march=armv5 is 65 equivalent to making the ARM 10TDMI core the default, we can set 66 SUBTARGET_CPU_DEFAULT and get an equivalent effect. */ 67#undef SUBTARGET_CPU_DEFAULT 68#define SUBTARGET_CPU_DEFAULT TARGET_CPU_arm10tdmi 69 70/* The assembler should assume VFP FPU format, and armv5t. */ 71#undef SUBTARGET_ASM_FLOAT_SPEC 72#define SUBTARGET_ASM_FLOAT_SPEC \ 73 "%{!mfpu=*:-mfpu=vfp} %{!mcpu=*:%{!march=*:-march=armv5t}}" 74 75/* SymbianOS provides the BPABI routines in a separate library. 76 Therefore, we do not need to define any of them in libgcc. */ 77#undef RENAME_LIBRARY 78#define RENAME_LIBRARY(GCC_NAME, AEABI_NAME) /* empty */ 79 80/* Define the __symbian__ macro. */ 81#undef TARGET_OS_CPP_BUILTINS 82#define TARGET_OS_CPP_BUILTINS() \ 83 do \ 84 { \ 85 /* Include the default BPABI stuff. */ \ 86 TARGET_BPABI_CPP_BUILTINS (); \ 87 builtin_define ("__symbian__"); \ 88 } \ 89 while (false) 90 91/* On SymbianOS, these sections are not writable, so we use "a", 92 rather than "aw", for the section attributes. */ 93#undef ARM_EABI_CTORS_SECTION_OP 94#define ARM_EABI_CTORS_SECTION_OP \ 95 "\t.section\t.init_array,\"a\",%init_array" 96#undef ARM_EABI_DTORS_SECTION_OP 97#define ARM_EABI_DTORS_SECTION_OP \ 98 "\t.section\t.fini_array,\"a\",%fini_array" 99 100/* SymbianOS cannot merge entities with vague linkage at runtime. */ 101#define TARGET_ARM_DYNAMIC_VAGUE_LINKAGE_P false 102