1/* Specific flags and argument handling of the C front-end. 2 Copyright (C) 1999, 2001, 2003, 2007 Free Software Foundation, Inc. 3 4This file is part of GCC. 5 6GCC is free software; you can redistribute it and/or modify it under 7the terms of the GNU General Public License as published by the Free 8Software Foundation; either version 3, or (at your option) any later 9version. 10 11GCC is distributed in the hope that it will be useful, but WITHOUT ANY 12WARRANTY; without even the implied warranty of MERCHANTABILITY or 13FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14for more details. 15 16You should have received a copy of the GNU General Public License 17along 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 26/* Filter argc and argv before processing by the gcc driver proper. */ 27void 28lang_specific_driver (int *in_argc ATTRIBUTE_UNUSED, 29 const char *const **in_argv 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) && ! defined(NEXT_OBJC_RUNTIME) 36 int i; 37 38 /* The new argument list will be contained in this. */ 39 const char **arglist; 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 int argc; 46 47 /* The argument list. */ 48 const char *const *argv; 49 50 argc = *in_argc; 51 argv = *in_argv; 52 53 for (i = 1; i < argc; i++) 54 { 55 if (argv[i][0] == '-') 56 { 57 if (strcmp (argv[i], "-static-libgcc") == 0 58 || strcmp (argv[i], "-static") == 0) 59 return; 60 } 61 else 62 { 63 int len; 64 65 /* If the filename ends in .m or .mi, we are compiling ObjC 66 and want to pass -shared-libgcc. */ 67 len = strlen (argv[i]); 68 if ((len > 2 && argv[i][len - 2] == '.' && argv[i][len - 1] == 'm') 69 || (len > 3 && argv[i][len - 3] == '.' && argv[i][len - 2] == 'm' 70 && argv[i][len - 1] == 'i')) 71 shared_libgcc = 1; 72 } 73 } 74 75 if (shared_libgcc) 76 { 77 /* Make sure to have room for the trailing NULL argument. */ 78 arglist = XNEWVEC (const char *, argc + 2); 79 80 i = 0; 81 do 82 { 83 arglist[i] = argv[i]; 84 i++; 85 } 86 while (i < argc); 87 88 arglist[i++] = "-shared-libgcc"; 89 90 arglist[i] = NULL; 91 92 *in_argc = i; 93 *in_argv = arglist; 94 } 95#endif 96} 97 98/* Called before linking. Returns 0 on success and -1 on failure. */ 99int 100lang_specific_pre_link (void) 101{ 102 return 0; /* Not used for C. */ 103} 104 105/* Number of extra output files that lang_specific_pre_link may generate. */ 106int lang_specific_extra_outfiles = 0; /* Not used for C. */ 107