1 /* Specific flags and argument handling of the C preprocessor.
2 Copyright (C) 1999 Free Software Foundation, Inc.
4 This file is part of GCC.
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 2, or (at your option) any later
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
16 You should have received a copy of the GNU General Public License
17 along with GCC; see the file COPYING. If not, write to the Free
18 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
23 #include "coretypes.h"
27 /* The `cpp' executable installed in $(bindir) and $(cpp_install_dir)
28 is a customized version of the gcc driver. It forces -E; -S and -c
29 are errors. It defaults to -x c for files with unrecognized
30 extensions, unless -x options appear in argv, in which case we
31 assume the user knows what they're doing. If no explicit input is
32 mentioned, it will read stdin. */
34 #ifndef SWITCH_TAKES_ARG
35 #define SWITCH_TAKES_ARG(CHAR) DEFAULT_SWITCH_TAKES_ARG(CHAR)
38 #ifndef WORD_SWITCH_TAKES_ARG
39 #define WORD_SWITCH_TAKES_ARG(STR) DEFAULT_WORD_SWITCH_TAKES_ARG (STR)
42 /* Suffixes for known sorts of input files. Note that we do not list
43 files which are normally considered to have been preprocessed already,
44 since the user's expectation is that `cpp' always preprocesses. */
45 static const char *const known_suffixes[] =
47 ".c", ".C", ".S", ".m",
48 ".cc", ".cxx", ".cpp", ".cp", ".c++",
52 /* Filter argc and argv before processing by the gcc driver proper. */
54 lang_specific_driver (in_argc, in_argv, in_added_libraries)
56 const char *const **in_argv;
57 int *in_added_libraries ATTRIBUTE_UNUSED;
60 const char *const *argv = *in_argv;
62 /* Do we need to read stdin? */
65 /* Do we need to insert -E? */
68 /* Do we need to insert -no-gcc? */
71 /* Have we seen an input file? */
74 /* Positions to insert -xc, -xassembler-with-cpp, and -o, if necessary.
75 0 means unnecessary. */
80 /* Do we need to fix up an input file with an unrecognized suffix? */
84 const char **new_argv;
86 extern int is_cpp_driver;
90 /* First pass. If we see an -S or -c, barf. If we see an input file,
91 turn off read_stdin. If we see a second input file, it is actually
92 the output file. If we see a third input file, barf. */
93 for (i = 1; i < argc; i++)
101 if (argv[i][0] == '-')
103 if (argv[i][1] == '\0')
105 else if (argv[i][2] == '\0')
107 if (argv[i][1] == 'E')
109 else if (argv[i][1] == 'S' || argv[i][1] == 'c')
111 fatal ("\"%s\" is not a valid option to the preprocessor",
115 else if (argv[i][1] == 'x')
120 else if (SWITCH_TAKES_ARG (argv[i][1]))
123 else if (argv[i][1] == 'x')
125 else if (argv[i][1] == 'g' && !strcmp(&argv[i][2], "cc"))
127 else if (WORD_SWITCH_TAKES_ARG (&argv[i][1]))
130 else /* not an option */
135 fatal ("too many input files");
138 else if (seen_input == 2)
147 int l = strlen (argv[i]);
149 const char *const *suff;
151 for (suff = known_suffixes; *suff; suff++)
152 if (!strcmp (*suff, &argv[i][l - strlen(*suff)]))
160 /* .s files are a special case; we have to treat
161 them like .S files so -D__ASSEMBLER__ will be
163 if (!strcmp (".s", &argv[i][l - 2]))
173 /* If we don't need to edit the command line, we can bail early. */
175 new_argc = argc + need_E + need_no_gcc + read_stdin
176 + !!o_here + !!lang_c_here + !!lang_S_here;
178 if (new_argc == argc)
181 /* One more slot for a terminating null. */
182 new_argv = (const char **) xmalloc ((new_argc + 1) * sizeof(char *));
184 new_argv[0] = argv[0];
188 new_argv[j++] = "-E";
191 new_argv[j++] = "-no-gcc";
193 for (i = 1; i < argc; i++, j++)
195 if (i == lang_c_here)
196 new_argv[j++] = "-xc";
197 else if (i == lang_S_here)
198 new_argv[j++] = "-xassembler-with-cpp";
199 else if (i == o_here)
200 new_argv[j++] = "-o";
202 new_argv[j] = argv[i];
213 /* Called before linking. Returns 0 on success and -1 on failure. */
214 int lang_specific_pre_link ()
216 return 0; /* Not used for cpp. */
219 /* Number of extra output files that lang_specific_pre_link may generate. */
220 int lang_specific_extra_outfiles = 0; /* Not used for cpp. */
222 /* Table of language-specific spec functions. */
223 const struct spec_function lang_specific_spec_functions[] =