1 /* Specific flags and argument handling of the C front-end. 2 Copyright (C) 1999-2018 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 "opts.h" 25 26 /* Filter command line before processing by the gcc driver proper. */ 27 void 28 lang_specific_driver (struct cl_decoded_option **in_decoded_options ATTRIBUTE_UNUSED, 29 unsigned int *in_decoded_options_count ATTRIBUTE_UNUSED, 30 int *in_added_libraries ATTRIBUTE_UNUSED) 31 { 32 /* Systems which use the NeXT runtime by default should arrange 33 for the shared libgcc to be used when -fgnu-runtime is passed 34 through specs. */ 35 #if defined(ENABLE_SHARED_LIBGCC) && ! NEXT_OBJC_RUNTIME 36 unsigned int i; 37 38 /* The new argument list will be contained in this. */ 39 struct cl_decoded_option *new_decoded_options; 40 41 /* True if we should add -shared-libgcc to the command-line. */ 42 int shared_libgcc = 0; 43 44 /* The total number of arguments with the new stuff. */ 45 unsigned int argc; 46 47 /* The argument list. */ 48 struct cl_decoded_option *decoded_options; 49 50 argc = *in_decoded_options_count; 51 decoded_options = *in_decoded_options; 52 53 for (i = 1; i < argc; i++) 54 { 55 switch (decoded_options[i].opt_index) 56 { 57 case OPT_static_libgcc: 58 case OPT_static: 59 return; 60 61 case OPT_SPECIAL_input_file: 62 { 63 const char *file = decoded_options[i].arg; 64 int len; 65 66 /* If the filename ends in .m or .mi, we are compiling 67 ObjC and want to pass -shared-libgcc. */ 68 len = strlen (file); 69 if ((len > 2 && file[len - 2] == '.' && file[len - 1] == 'm') 70 || (len > 3 && file[len - 3] == '.' && file[len - 2] == 'm' 71 && file[len - 1] == 'i')) 72 shared_libgcc = 1; 73 } 74 break; 75 } 76 } 77 78 if (shared_libgcc) 79 { 80 new_decoded_options = XNEWVEC (struct cl_decoded_option, argc + 1); 81 82 i = 0; 83 do 84 { 85 new_decoded_options[i] = decoded_options[i]; 86 i++; 87 } 88 while (i < argc); 89 90 generate_option (OPT_shared_libgcc, NULL, 1, CL_DRIVER, 91 &new_decoded_options[i++]); 92 93 *in_decoded_options_count = i; 94 *in_decoded_options = new_decoded_options; 95 } 96 #endif 97 } 98 99 /* Called before linking. Returns 0 on success and -1 on failure. */ 100 int 101 lang_specific_pre_link (void) 102 { 103 return 0; /* Not used for C. */ 104 } 105 106 /* Number of extra output files that lang_specific_pre_link may generate. */ 107 int lang_specific_extra_outfiles = 0; /* Not used for C. */ 108