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922cf99e | 1 | /* Specific flags and argument handling of the C preprocessor. |
a5544970 | 2 | Copyright (C) 1999-2019 Free Software Foundation, Inc. |
922cf99e | 3 | |
1322177d | 4 | This file is part of GCC. |
922cf99e | 5 | |
1322177d LB |
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 | |
9dcd6f09 | 8 | Software Foundation; either version 3, or (at your option) any later |
1322177d | 9 | version. |
922cf99e | 10 | |
1322177d LB |
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 | |
14 | for more details. | |
922cf99e ZW |
15 | |
16 | You should have received a copy of the GNU General Public License | |
9dcd6f09 NC |
17 | along with GCC; see the file COPYING3. If not see |
18 | <http://www.gnu.org/licenses/>. */ | |
922cf99e ZW |
19 | |
20 | #include "config.h" | |
21 | #include "system.h" | |
4977bab6 ZW |
22 | #include "coretypes.h" |
23 | #include "tm.h" | |
98086b2b | 24 | #include "opt-suggestions.h" |
9257393c | 25 | #include "gcc.h" |
d9d16a19 | 26 | #include "opts.h" |
922cf99e ZW |
27 | |
28 | /* The `cpp' executable installed in $(bindir) and $(cpp_install_dir) | |
29 | is a customized version of the gcc driver. It forces -E; -S and -c | |
30 | are errors. It defaults to -x c for files with unrecognized | |
31 | extensions, unless -x options appear in argv, in which case we | |
32 | assume the user knows what they're doing. If no explicit input is | |
ec5c56db | 33 | mentioned, it will read stdin. */ |
922cf99e | 34 | |
54ff00f6 DB |
35 | /* Suffixes for known sorts of input files. Note that we do not list |
36 | files which are normally considered to have been preprocessed already, | |
37 | since the user's expectation is that `cpp' always preprocesses. */ | |
922cf99e ZW |
38 | static const char *const known_suffixes[] = |
39 | { | |
54ff00f6 | 40 | ".c", ".C", ".S", ".m", |
922cf99e | 41 | ".cc", ".cxx", ".cpp", ".cp", ".c++", |
55b8093e | 42 | ".sx", |
922cf99e ZW |
43 | NULL |
44 | }; | |
45 | ||
d9d16a19 | 46 | /* Filter the command line before processing by the gcc driver proper. */ |
922cf99e | 47 | void |
d9d16a19 JM |
48 | lang_specific_driver (struct cl_decoded_option **in_decoded_options, |
49 | unsigned int *in_decoded_options_count, | |
6cf87ca4 | 50 | int *in_added_libraries ATTRIBUTE_UNUSED) |
922cf99e | 51 | { |
d9d16a19 JM |
52 | struct cl_decoded_option *decoded_options = *in_decoded_options; |
53 | unsigned int argc = *in_decoded_options_count; | |
37620334 | 54 | |
922cf99e | 55 | /* Do we need to read stdin? */ |
54ff00f6 | 56 | int read_stdin = 1; |
922cf99e ZW |
57 | |
58 | /* Do we need to insert -E? */ | |
54ff00f6 | 59 | int need_E = 1; |
922cf99e | 60 | |
54ff00f6 DB |
61 | /* Have we seen an input file? */ |
62 | int seen_input = 0; | |
df383483 | 63 | |
54ff00f6 | 64 | /* Positions to insert -xc, -xassembler-with-cpp, and -o, if necessary. |
ec5c56db | 65 | 0 means unnecessary. */ |
d9d16a19 JM |
66 | unsigned int lang_c_here = 0; |
67 | unsigned int lang_S_here = 0; | |
68 | unsigned int o_here = 0; | |
54ff00f6 DB |
69 | |
70 | /* Do we need to fix up an input file with an unrecognized suffix? */ | |
71 | int need_fixups = 1; | |
df383483 | 72 | |
d9d16a19 JM |
73 | unsigned int i, j; |
74 | struct cl_decoded_option *new_decoded_options; | |
75 | unsigned int new_argc; | |
69927b59 NB |
76 | extern int is_cpp_driver; |
77 | ||
78 | is_cpp_driver = 1; | |
922cf99e ZW |
79 | |
80 | /* First pass. If we see an -S or -c, barf. If we see an input file, | |
54ff00f6 DB |
81 | turn off read_stdin. If we see a second input file, it is actually |
82 | the output file. If we see a third input file, barf. */ | |
922cf99e ZW |
83 | for (i = 1; i < argc; i++) |
84 | { | |
d9d16a19 | 85 | switch (decoded_options[i].opt_index) |
922cf99e | 86 | { |
d9d16a19 JM |
87 | case OPT_E: |
88 | need_E = 0; | |
89 | break; | |
df383483 | 90 | |
d9d16a19 JM |
91 | case OPT_S: |
92 | case OPT_c: | |
40fecdd6 JM |
93 | fatal_error (input_location, |
94 | "%qs is not a valid option to the preprocessor", | |
d9d16a19 JM |
95 | decoded_options[i].orig_option_with_args_text); |
96 | return; | |
97 | ||
98 | case OPT_x: | |
99 | need_fixups = 0; | |
100 | break; | |
101 | ||
102 | case OPT_SPECIAL_input_file: | |
103 | { | |
104 | const char *file = decoded_options[i].arg; | |
105 | ||
106 | if (strcmp (file, "-") == 0) | |
54ff00f6 | 107 | read_stdin = 0; |
d9d16a19 JM |
108 | else |
109 | { | |
110 | seen_input++; | |
111 | if (seen_input == 3) | |
112 | { | |
40fecdd6 | 113 | fatal_error (input_location, "too many input files"); |
d9d16a19 JM |
114 | return; |
115 | } | |
116 | else if (seen_input == 2) | |
117 | { | |
118 | o_here = i; | |
119 | } | |
120 | else | |
121 | { | |
122 | read_stdin = 0; | |
123 | if (need_fixups) | |
54ff00f6 | 124 | { |
d9d16a19 JM |
125 | int l = strlen (file); |
126 | int known = 0; | |
127 | const char *const *suff; | |
128 | ||
129 | for (suff = known_suffixes; *suff; suff++) | |
130 | if (!strcmp (*suff, &file[l - strlen(*suff)])) | |
131 | { | |
132 | known = 1; | |
133 | break; | |
134 | } | |
135 | ||
136 | if (! known) | |
137 | { | |
138 | /* .s files are a special case; we have to | |
139 | treat them like .S files so | |
140 | -D__ASSEMBLER__ will be in effect. */ | |
141 | if (!strcmp (".s", &file[l - 2])) | |
142 | lang_S_here = i; | |
143 | else | |
144 | lang_c_here = i; | |
145 | } | |
54ff00f6 | 146 | } |
d9d16a19 JM |
147 | } |
148 | } | |
149 | } | |
150 | break; | |
922cf99e ZW |
151 | } |
152 | } | |
153 | ||
54ff00f6 DB |
154 | /* If we don't need to edit the command line, we can bail early. */ |
155 | ||
d9d16a19 | 156 | new_argc = argc + need_E + read_stdin + !!lang_c_here + !!lang_S_here; |
54ff00f6 | 157 | |
d9d16a19 | 158 | if (new_argc == argc && !o_here) |
54ff00f6 | 159 | return; |
922cf99e | 160 | |
d9d16a19 | 161 | new_decoded_options = XNEWVEC (struct cl_decoded_option, new_argc); |
922cf99e | 162 | |
9e8d926e | 163 | new_decoded_options[0] = decoded_options[0]; |
54ff00f6 DB |
164 | j = 1; |
165 | ||
922cf99e | 166 | if (need_E) |
d9d16a19 | 167 | generate_option (OPT_E, NULL, 1, CL_DRIVER, &new_decoded_options[j++]); |
54ff00f6 DB |
168 | |
169 | for (i = 1; i < argc; i++, j++) | |
922cf99e | 170 | { |
54ff00f6 | 171 | if (i == lang_c_here) |
d9d16a19 | 172 | generate_option (OPT_x, "c", 1, CL_DRIVER, &new_decoded_options[j++]); |
54ff00f6 | 173 | else if (i == lang_S_here) |
d9d16a19 JM |
174 | generate_option (OPT_x, "assembler-with-cpp", 1, CL_DRIVER, |
175 | &new_decoded_options[j++]); | |
54ff00f6 | 176 | else if (i == o_here) |
d9d16a19 JM |
177 | { |
178 | generate_option (OPT_o, decoded_options[i].arg, 1, CL_DRIVER, | |
179 | &new_decoded_options[j]); | |
180 | continue; | |
181 | } | |
54ff00f6 | 182 | |
d9d16a19 | 183 | new_decoded_options[j] = decoded_options[i]; |
922cf99e | 184 | } |
922cf99e ZW |
185 | |
186 | if (read_stdin) | |
d9d16a19 | 187 | generate_option_input_file ("-", &new_decoded_options[j++]); |
922cf99e | 188 | |
d9d16a19 JM |
189 | *in_decoded_options_count = new_argc; |
190 | *in_decoded_options = new_decoded_options; | |
df383483 | 191 | } |
922cf99e | 192 | |
ec5c56db | 193 | /* Called before linking. Returns 0 on success and -1 on failure. */ |
6cf87ca4 | 194 | int lang_specific_pre_link (void) |
922cf99e | 195 | { |
ec5c56db | 196 | return 0; /* Not used for cpp. */ |
922cf99e ZW |
197 | } |
198 | ||
ec5c56db KH |
199 | /* Number of extra output files that lang_specific_pre_link may generate. */ |
200 | int lang_specific_extra_outfiles = 0; /* Not used for cpp. */ |