| /* Specific flags and argument handling of the C preprocessor. |
| Copyright (C) 1999 Free Software Foundation, Inc. |
| |
| This file is part of GNU CC. |
| |
| GNU CC 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 2, or (at your option) |
| any later version. |
| |
| GNU CC 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 GNU CC; see the file COPYING. If not, write to |
| the Free Software Foundation, 59 Temple Place - Suite 330, |
| Boston, MA 02111-1307, USA. */ |
| |
| #include "config.h" |
| #include "system.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. */ |
| |
| /* Snarfed from gcc.c: */ |
| |
| /* This defines which switch letters take arguments. */ |
| |
| #define DEFAULT_SWITCH_TAKES_ARG(CHAR) \ |
| ((CHAR) == 'D' || (CHAR) == 'U' || (CHAR) == 'o' \ |
| || (CHAR) == 'e' || (CHAR) == 'T' || (CHAR) == 'u' \ |
| || (CHAR) == 'I' || (CHAR) == 'm' || (CHAR) == 'x' \ |
| || (CHAR) == 'L' || (CHAR) == 'A' || (CHAR) == 'V' \ |
| || (CHAR) == 'B' || (CHAR) == 'b') |
| |
| #ifndef SWITCH_TAKES_ARG |
| #define SWITCH_TAKES_ARG(CHAR) DEFAULT_SWITCH_TAKES_ARG(CHAR) |
| #endif |
| |
| /* This defines which multi-letter switches take arguments. */ |
| |
| #define DEFAULT_WORD_SWITCH_TAKES_ARG(STR) \ |
| (!strcmp (STR, "Tdata") || !strcmp (STR, "Ttext") \ |
| || !strcmp (STR, "Tbss") || !strcmp (STR, "include") \ |
| || !strcmp (STR, "imacros") || !strcmp (STR, "aux-info") \ |
| || !strcmp (STR, "idirafter") || !strcmp (STR, "iprefix") \ |
| || !strcmp (STR, "iwithprefix") || !strcmp (STR, "iwithprefixbefore") \ |
| || !strcmp (STR, "isystem") || !strcmp (STR, "specs") \ |
| || !strcmp (STR, "MF") || !strcmp (STR, "MT") || !strcmp (STR, "MQ")) |
| |
| #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++", |
| NULL |
| }; |
| |
| /* Filter argc and argv before processing by the gcc driver proper. */ |
| void |
| lang_specific_driver (in_argc, in_argv, in_added_libraries) |
| 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; |
| |
| /* Do we need to insert -no-gcc? */ |
| int need_no_gcc = 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; |
| |
| /* 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 (argv[i][1] == 'g' && !strcmp(&argv[i][2], "cc")) |
| need_no_gcc = 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 + need_no_gcc + read_stdin |
| + !!o_here + !!lang_c_here + !!lang_S_here; |
| |
| if (new_argc == argc) |
| return; |
| |
| /* One more slot for a terminating null. */ |
| new_argv = (const char **) xmalloc ((new_argc + 1) * sizeof(char *)); |
| |
| new_argv[0] = argv[0]; |
| j = 1; |
| |
| if (need_E) |
| new_argv[j++] = "-E"; |
| |
| if (need_no_gcc) |
| new_argv[j++] = "-no-gcc"; |
| |
| 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 () |
| { |
| 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. */ |