1 /* Configuration file for Symbian OS on ARM processors. 2 Copyright (C) 2004-2021 Free Software Foundation, Inc. 3 Contributed by CodeSourcery, LLC 4 5 This file is part of GCC. 6 7 GCC is free software; you can redistribute it and/or modify it 8 under the terms of the GNU General Public License as published 9 by the Free Software Foundation; either version 3, or (at your 10 option) any later version. 11 12 GCC is distributed in the hope that it will be useful, but WITHOUT 13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 14 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public 15 License for more details. 16 17 You should have received a copy of the GNU General Public License 18 along with GCC; see the file COPYING3. If not see 19 <http://www.gnu.org/licenses/>. */ 20 21 /* Do not expand builtin functions (unless explicitly prefixed with 22 "__builtin"). Symbian OS code relies on properties of the standard 23 library that go beyond those guaranteed by the ANSI/ISO standard. 24 For example, "memcpy" works even with overlapping memory, like 25 "memmove". We cannot simply set flag_no_builtin in arm.c because 26 (a) flag_no_builtin is not declared in language-independent code, 27 and (b) that would prevent users from explicitly overriding the 28 default with -fbuiltin, which may sometimes be useful. 29 30 Make all symbols hidden by default. Symbian OS expects that all 31 exported symbols will be explicitly marked with 32 "__declspec(dllexport)". 33 34 Enumeration types use 4 bytes, even if the enumerals are small, 35 unless explicitly overridden. 36 37 The wchar_t type is a 2-byte type, unless explicitly 38 overridden. */ 39 #define CC1_SPEC \ 40 "%{!fbuiltin:%{!fno-builtin:-fno-builtin}} " \ 41 "%{!fvisibility=*:-fvisibility=hidden} " \ 42 "%{!fshort-enums:%{!fno-short-enums:-fno-short-enums}} " \ 43 "%{!fshort-wchar:%{!fno-short-wchar:-fshort-wchar}} " 44 #define CC1PLUS_SPEC CC1_SPEC 45 46 /* Symbian OS does not use crt*.o, unlike the generic unknown-elf 47 configuration. */ 48 #undef STARTFILE_SPEC 49 #define STARTFILE_SPEC "" 50 51 #undef ENDFILE_SPEC 52 #define ENDFILE_SPEC "" 53 54 /* Do not link with any libraries by default. On Symbian OS, the user 55 must supply all required libraries on the command line. */ 56 #undef LIB_SPEC 57 #define LIB_SPEC "" 58 59 /* Support the "dllimport" attribute. */ 60 #define TARGET_DLLIMPORT_DECL_ATTRIBUTES 1 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 /* Define the __symbian__ macro. */ 68 #undef TARGET_OS_CPP_BUILTINS 69 #define TARGET_OS_CPP_BUILTINS() \ 70 do \ 71 { \ 72 /* Include the default BPABI stuff. */ \ 73 TARGET_BPABI_CPP_BUILTINS (); \ 74 /* Symbian OS does not support merging symbols across DLL \ 75 boundaries. */ \ 76 builtin_define ("__GXX_MERGED_TYPEINFO_NAMES=0"); \ 77 builtin_define ("__symbian__"); \ 78 } \ 79 while (false) 80 81 /* On SymbianOS, these sections are not writable, so we use "a", 82 rather than "aw", for the section attributes. */ 83 #undef ARM_EABI_CTORS_SECTION_OP 84 #define ARM_EABI_CTORS_SECTION_OP \ 85 "\t.section\t.init_array,\"a\",%init_array" 86 #undef ARM_EABI_DTORS_SECTION_OP 87 #define ARM_EABI_DTORS_SECTION_OP \ 88 "\t.section\t.fini_array,\"a\",%fini_array" 89 90 /* SymbianOS cannot merge entities with vague linkage at runtime. */ 91 #define TARGET_ARM_DYNAMIC_VAGUE_LINKAGE_P false 92 93 #define TARGET_DEFAULT_WORD_RELOCATIONS 1 94 95 #define ARM_TARGET2_DWARF_FORMAT DW_EH_PE_absptr 96