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[/] [openrisc/] [trunk/] [gnu-src/] [gcc-4.5.1/] [gcc/] [cppspec.c] - Rev 310
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/* Specific flags and argument handling of the C preprocessor. Copyright (C) 1999, 2007 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" /* 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. */ #ifndef SWITCH_TAKES_ARG #define SWITCH_TAKES_ARG(CHAR) DEFAULT_SWITCH_TAKES_ARG(CHAR) #endif #ifndef WORD_SWITCH_TAKES_ARG #define WORD_SWITCH_TAKES_ARG(STR) DEFAULT_WORD_SWITCH_TAKES_ARG (STR) #endif /* 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 argc and argv before processing by the gcc driver proper. */ void lang_specific_driver (int *in_argc, const char *const **in_argv, int *in_added_libraries ATTRIBUTE_UNUSED) { int argc = *in_argc; const char *const *argv = *in_argv; /* 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. */ int lang_c_here = 0; int lang_S_here = 0; int o_here = 0; /* Do we need to fix up an input file with an unrecognized suffix? */ int need_fixups = 1; int i, j, quote = 0; const char **new_argv; 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++) { if (quote == 1) { quote = 0; continue; } if (argv[i][0] == '-') { if (argv[i][1] == '\0') read_stdin = 0; else if (argv[i][2] == '\0') { if (argv[i][1] == 'E') need_E = 0; else if (argv[i][1] == 'S' || argv[i][1] == 'c') { fatal ("\"%s\" is not a valid option to the preprocessor", argv[i]); return; } else if (argv[i][1] == 'x') { need_fixups = 0; quote = 1; } else if (SWITCH_TAKES_ARG (argv[i][1])) quote = 1; } else if (argv[i][1] == 'x') need_fixups = 0; else if (WORD_SWITCH_TAKES_ARG (&argv[i][1])) quote = 1; } else /* not an option */ { seen_input++; if (seen_input == 3) { fatal ("too many input files"); return; } else if (seen_input == 2) { o_here = i; } else { read_stdin = 0; if (need_fixups) { int l = strlen (argv[i]); int known = 0; const char *const *suff; for (suff = known_suffixes; *suff; suff++) if (!strcmp (*suff, &argv[i][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", &argv[i][l - 2])) lang_S_here = i; else lang_c_here = i; } } } } } /* If we don't need to edit the command line, we can bail early. */ new_argc = argc + need_E + read_stdin + !!o_here + !!lang_c_here + !!lang_S_here; if (new_argc == argc) return; /* One more slot for a terminating null. */ new_argv = XNEWVEC (const char *, new_argc + 1); new_argv[0] = argv[0]; j = 1; if (need_E) new_argv[j++] = "-E"; for (i = 1; i < argc; i++, j++) { if (i == lang_c_here) new_argv[j++] = "-xc"; else if (i == lang_S_here) new_argv[j++] = "-xassembler-with-cpp"; else if (i == o_here) new_argv[j++] = "-o"; new_argv[j] = argv[i]; } if (read_stdin) new_argv[j++] = "-"; new_argv[j] = NULL; *in_argc = new_argc; *in_argv = new_argv; } /* 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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