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