1 /* Specific flags and argument handling of the C front-end. 2 Copyright (C) 1999, 2001, 2003, 2007, 2010 Free Software Foundation, Inc. 3 4 This file is part of GCC. 5 6 GCC is free software; you can redistribute it and/or modify it under 7 the terms of the GNU General Public License as published by the Free 8 Software Foundation; either version 3, or (at your option) any later 9 version. 10 11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY 12 WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 for more details. 15 16 You should have received a copy of the GNU General Public License 17 along with GCC; see the file COPYING3. If not see 18 <http://www.gnu.org/licenses/>. */ 19 20 #include "config.h" 21 #include "system.h" 22 #include "coretypes.h" 23 #include "tm.h" 24 #include "gcc.h" 25 #include "opts.h" 26 27 /* Filter command line before processing by the gcc driver proper. */ 28 void 29 lang_specific_driver (struct cl_decoded_option **in_decoded_options ATTRIBUTE_UNUSED, 30 unsigned int *in_decoded_options_count ATTRIBUTE_UNUSED, 31 int *in_added_libraries ATTRIBUTE_UNUSED) 32 { 33 /* Systems which use the NeXT runtime by default should arrange 34 for the shared libgcc to be used when -fgnu-runtime is passed 35 through specs. */ 36 #if defined(ENABLE_SHARED_LIBGCC) && ! NEXT_OBJC_RUNTIME 37 unsigned int i; 38 39 /* The new argument list will be contained in this. */ 40 struct cl_decoded_option *new_decoded_options; 41 42 /* True if we should add -shared-libgcc to the command-line. */ 43 int shared_libgcc = 0; 44 45 /* The total number of arguments with the new stuff. */ 46 unsigned int argc; 47 48 /* The argument list. */ 49 struct cl_decoded_option *decoded_options; 50 51 argc = *in_decoded_options_count; 52 decoded_options = *in_decoded_options; 53 54 for (i = 1; i < argc; i++) 55 { 56 switch (decoded_options[i].opt_index) 57 { 58 case OPT_static_libgcc: 59 case OPT_static: 60 return; 61 62 case OPT_SPECIAL_input_file: 63 { 64 const char *file = decoded_options[i].arg; 65 int len; 66 67 /* If the filename ends in .m or .mi, we are compiling 68 ObjC and want to pass -shared-libgcc. */ 69 len = strlen (file); 70 if ((len > 2 && file[len - 2] == '.' && file[len - 1] == 'm') 71 || (len > 3 && file[len - 3] == '.' && file[len - 2] == 'm' 72 && file[len - 1] == 'i')) 73 shared_libgcc = 1; 74 } 75 break; 76 } 77 } 78 79 if (shared_libgcc) 80 { 81 new_decoded_options = XNEWVEC (struct cl_decoded_option, argc + 1); 82 83 i = 0; 84 do 85 { 86 new_decoded_options[i] = decoded_options[i]; 87 i++; 88 } 89 while (i < argc); 90 91 generate_option (OPT_shared_libgcc, NULL, 1, CL_DRIVER, 92 &new_decoded_options[i++]); 93 94 *in_decoded_options_count = i; 95 *in_decoded_options = new_decoded_options; 96 } 97 #endif 98 } 99 100 /* Called before linking. Returns 0 on success and -1 on failure. */ 101 int 102 lang_specific_pre_link (void) 103 { 104 return 0; /* Not used for C. */ 105 } 106 107 /* Number of extra output files that lang_specific_pre_link may generate. */ 108 int lang_specific_extra_outfiles = 0; /* Not used for C. */ 109