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[/] [openrisc/] [trunk/] [gnu-dev/] [or1k-gcc/] [gcc/] [cppspec.c] - Rev 772
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/* Specific flags and argument handling of the C preprocessor. Copyright (C) 1999, 2007, 2010, 2011 Free Software Foundation, Inc. This file is part of GCC. GCC is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3, or (at your option) any later version. GCC is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with GCC; see the file COPYING3. If not see <http://www.gnu.org/licenses/>. */ #include "config.h" #include "system.h" #include "coretypes.h" #include "tm.h" #include "gcc.h" #include "opts.h" /* The `cpp' executable installed in $(bindir) and $(cpp_install_dir) is a customized version of the gcc driver. It forces -E; -S and -c are errors. It defaults to -x c for files with unrecognized extensions, unless -x options appear in argv, in which case we assume the user knows what they're doing. If no explicit input is mentioned, it will read stdin. */ /* Suffixes for known sorts of input files. Note that we do not list files which are normally considered to have been preprocessed already, since the user's expectation is that `cpp' always preprocesses. */ static const char *const known_suffixes[] = { ".c", ".C", ".S", ".m", ".cc", ".cxx", ".cpp", ".cp", ".c++", ".sx", NULL }; /* Filter the command line before processing by the gcc driver proper. */ void lang_specific_driver (struct cl_decoded_option **in_decoded_options, unsigned int *in_decoded_options_count, int *in_added_libraries ATTRIBUTE_UNUSED) { struct cl_decoded_option *decoded_options = *in_decoded_options; unsigned int argc = *in_decoded_options_count; /* Do we need to read stdin? */ int read_stdin = 1; /* Do we need to insert -E? */ int need_E = 1; /* Have we seen an input file? */ int seen_input = 0; /* Positions to insert -xc, -xassembler-with-cpp, and -o, if necessary. 0 means unnecessary. */ unsigned int lang_c_here = 0; unsigned int lang_S_here = 0; unsigned int o_here = 0; /* Do we need to fix up an input file with an unrecognized suffix? */ int need_fixups = 1; unsigned int i, j; struct cl_decoded_option *new_decoded_options; unsigned int new_argc; extern int is_cpp_driver; is_cpp_driver = 1; /* First pass. If we see an -S or -c, barf. If we see an input file, turn off read_stdin. If we see a second input file, it is actually the output file. If we see a third input file, barf. */ for (i = 1; i < argc; i++) { switch (decoded_options[i].opt_index) { case OPT_E: need_E = 0; break; case OPT_S: case OPT_c: fatal_error ("%qs is not a valid option to the preprocessor", decoded_options[i].orig_option_with_args_text); return; case OPT_x: need_fixups = 0; break; case OPT_SPECIAL_input_file: { const char *file = decoded_options[i].arg; if (strcmp (file, "-") == 0) read_stdin = 0; else { seen_input++; if (seen_input == 3) { fatal_error ("too many input files"); return; } else if (seen_input == 2) { o_here = i; } else { read_stdin = 0; if (need_fixups) { int l = strlen (file); int known = 0; const char *const *suff; for (suff = known_suffixes; *suff; suff++) if (!strcmp (*suff, &file[l - strlen(*suff)])) { known = 1; break; } if (! known) { /* .s files are a special case; we have to treat them like .S files so -D__ASSEMBLER__ will be in effect. */ if (!strcmp (".s", &file[l - 2])) lang_S_here = i; else lang_c_here = i; } } } } } break; } } /* If we don't need to edit the command line, we can bail early. */ new_argc = argc + need_E + read_stdin + !!lang_c_here + !!lang_S_here; if (new_argc == argc && !o_here) return; new_decoded_options = XNEWVEC (struct cl_decoded_option, new_argc); new_decoded_options[0] = decoded_options[0]; j = 1; if (need_E) generate_option (OPT_E, NULL, 1, CL_DRIVER, &new_decoded_options[j++]); for (i = 1; i < argc; i++, j++) { if (i == lang_c_here) generate_option (OPT_x, "c", 1, CL_DRIVER, &new_decoded_options[j++]); else if (i == lang_S_here) generate_option (OPT_x, "assembler-with-cpp", 1, CL_DRIVER, &new_decoded_options[j++]); else if (i == o_here) { generate_option (OPT_o, decoded_options[i].arg, 1, CL_DRIVER, &new_decoded_options[j]); continue; } new_decoded_options[j] = decoded_options[i]; } if (read_stdin) generate_option_input_file ("-", &new_decoded_options[j++]); *in_decoded_options_count = new_argc; *in_decoded_options = new_decoded_options; } /* Called before linking. Returns 0 on success and -1 on failure. */ int lang_specific_pre_link (void) { return 0; /* Not used for cpp. */ } /* Number of extra output files that lang_specific_pre_link may generate. */ int lang_specific_extra_outfiles = 0; /* Not used for cpp. */
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