1 /* Default common target hook functions. 2 Copyright (C) 2003, 2004, 2005, 2007, 2008, 2009, 2010, 2011 3 Free Software Foundation, Inc. 4 5 This file is part of GCC. 6 7 GCC is free software; you can redistribute it and/or modify it under 8 the terms of the GNU General Public License as published by the Free 9 Software Foundation; either version 3, or (at your option) any later 10 version. 11 12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY 13 WARRANTY; without even the implied warranty of MERCHANTABILITY or 14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 15 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 #include "config.h" 22 #include "system.h" 23 #include "coretypes.h" 24 #include "input.h" 25 #include "tm.h" 26 #include "common/common-target.h" 27 #include "common/common-targhooks.h" 28 29 /* Determine the exception handling mechanism for the target. */ 30 31 enum unwind_info_type 32 default_except_unwind_info (struct gcc_options *opts ATTRIBUTE_UNUSED) 33 { 34 /* Obey the configure switch to turn on sjlj exceptions. */ 35 #ifdef CONFIG_SJLJ_EXCEPTIONS 36 if (CONFIG_SJLJ_EXCEPTIONS) 37 return UI_SJLJ; 38 #endif 39 40 /* ??? Change all users to the hook, then poison this. */ 41 #ifdef DWARF2_UNWIND_INFO 42 if (DWARF2_UNWIND_INFO) 43 return UI_DWARF2; 44 #endif 45 46 return UI_SJLJ; 47 } 48 49 /* To be used by targets that force dwarf2 unwind enabled. */ 50 51 enum unwind_info_type 52 dwarf2_except_unwind_info (struct gcc_options *opts ATTRIBUTE_UNUSED) 53 { 54 /* Obey the configure switch to turn on sjlj exceptions. */ 55 #ifdef CONFIG_SJLJ_EXCEPTIONS 56 if (CONFIG_SJLJ_EXCEPTIONS) 57 return UI_SJLJ; 58 #endif 59 60 return UI_DWARF2; 61 } 62 63 /* To be used by targets that force sjlj unwind enabled. */ 64 65 enum unwind_info_type 66 sjlj_except_unwind_info (struct gcc_options *opts ATTRIBUTE_UNUSED) 67 { 68 return UI_SJLJ; 69 } 70 71 /* Default version of TARGET_HANDLE_OPTION. */ 72 73 bool 74 default_target_handle_option (struct gcc_options *opts ATTRIBUTE_UNUSED, 75 struct gcc_options *opts_set ATTRIBUTE_UNUSED, 76 const struct cl_decoded_option *decoded ATTRIBUTE_UNUSED, 77 location_t loc ATTRIBUTE_UNUSED) 78 { 79 return true; 80 } 81 82 const struct default_options empty_optimization_table[] = 83 { 84 { OPT_LEVELS_NONE, 0, NULL, 0 } 85 }; 86