1 /* Specific flags and argument handling of the C preprocessor.
2 Copyright (C) 1999 Free Software Foundation, Inc.
4 This file is part of GNU CC.
6 GNU CC is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2, or (at your option)
11 GNU CC is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with GNU CC; see the file COPYING. If not, write to
18 the Free Software Foundation, 59 Temple Place - Suite 330,
19 Boston, MA 02111-1307, USA. */
25 /* The `cpp' executable installed in $(bindir) and $(cpp_install_dir)
26 is a customized version of the gcc driver. It forces -E; -S and -c
27 are errors. It defaults to -x c for files with unrecognized
28 extensions, unless -x options appear in argv, in which case we
29 assume the user knows what they're doing. If no explicit input is
30 mentioned, it will read stdin. */
32 /* Snarfed from gcc.c: */
34 /* This defines which switch letters take arguments. */
36 #define DEFAULT_SWITCH_TAKES_ARG(CHAR) \
37 ((CHAR) == 'D' || (CHAR) == 'U' || (CHAR) == 'o' \
38 || (CHAR) == 'e' || (CHAR) == 'T' || (CHAR) == 'u' \
39 || (CHAR) == 'I' || (CHAR) == 'm' || (CHAR) == 'x' \
40 || (CHAR) == 'L' || (CHAR) == 'A' || (CHAR) == 'V' \
41 || (CHAR) == 'B' || (CHAR) == 'b')
43 #ifndef SWITCH_TAKES_ARG
44 #define SWITCH_TAKES_ARG(CHAR) DEFAULT_SWITCH_TAKES_ARG(CHAR)
47 /* This defines which multi-letter switches take arguments. */
49 #define DEFAULT_WORD_SWITCH_TAKES_ARG(STR) \
50 (!strcmp (STR, "Tdata") || !strcmp (STR, "Ttext") \
51 || !strcmp (STR, "Tbss") || !strcmp (STR, "include") \
52 || !strcmp (STR, "imacros") || !strcmp (STR, "aux-info") \
53 || !strcmp (STR, "idirafter") || !strcmp (STR, "iprefix") \
54 || !strcmp (STR, "iwithprefix") || !strcmp (STR, "iwithprefixbefore") \
55 || !strcmp (STR, "isystem") || !strcmp (STR, "specs"))
57 #ifndef WORD_SWITCH_TAKES_ARG
58 #define WORD_SWITCH_TAKES_ARG(STR) DEFAULT_WORD_SWITCH_TAKES_ARG (STR)
61 /* Suffixes for known sorts of input files. Note that we do not list
62 files which are normally considered to have been preprocessed already,
63 since the user's expectation is that `cpp' always preprocesses. */
64 static const char *const known_suffixes
[] =
66 ".c", ".C", ".S", ".m",
67 ".cc", ".cxx", ".cpp", ".cp", ".c++",
71 /* Filter argc and argv before processing by the gcc driver proper. */
73 lang_specific_driver (in_argc
, in_argv
, in_added_libraries
)
75 const char *const **in_argv
;
76 int *in_added_libraries ATTRIBUTE_UNUSED
;
79 const char *const *argv
= *in_argv
;
81 /* Do we need to read stdin? */
84 /* Do we need to insert -E? */
87 /* Do we need to insert -no-gcc? */
90 /* Have we seen an input file? */
93 /* Positions to insert -xc, -xassembler-with-cpp, and -o, if necessary.
94 0 means unnecessary. */
99 /* Do we need to fix up an input file with an unrecognized suffix? */
103 const char **new_argv
;
106 /* First pass. If we see an -S or -c, barf. If we see an input file,
107 turn off read_stdin. If we see a second input file, it is actually
108 the output file. If we see a third input file, barf. */
109 for (i
= 1; i
< argc
; i
++)
117 if (argv
[i
][0] == '-')
119 if (argv
[i
][1] == '\0')
121 else if (argv
[i
][2] == '\0')
123 if (argv
[i
][1] == 'E')
125 else if (argv
[i
][1] == 'S' || argv
[i
][1] == 'c')
127 fatal ("\"%s\" is not a valid option to the preprocessor",
131 else if (argv
[i
][1] == 'x')
136 else if (SWITCH_TAKES_ARG (argv
[i
][1]))
139 else if (argv
[i
][1] == 'x')
141 else if (argv
[i
][1] == 'g' && !strcmp(&argv
[i
][2], "cc"))
143 else if (WORD_SWITCH_TAKES_ARG (&argv
[i
][1]))
146 else /* not an option */
151 fatal ("too many input files");
154 else if (seen_input
== 2)
163 int l
= strlen (argv
[i
]);
165 const char *const *suff
;
167 for (suff
= known_suffixes
; *suff
; suff
++)
168 if (!strcmp (*suff
, &argv
[i
][l
- strlen(*suff
)]))
176 /* .s files are a special case; we have to treat
177 them like .S files so -D__ASSEMBLER__ will be
179 if (!strcmp (".s", &argv
[i
][l
- 2]))
189 /* If we don't need to edit the command line, we can bail early. */
191 new_argc
= argc
+ need_E
+ need_no_gcc
+ read_stdin
192 + !!o_here
+ !!lang_c_here
+ !!lang_S_here
;
194 if (new_argc
== argc
)
197 /* One more slot for a terminating null. */
198 new_argv
= (const char **) xmalloc ((new_argc
+ 1) * sizeof(char *));
200 new_argv
[0] = argv
[0];
204 new_argv
[j
++] = "-E";
207 new_argv
[j
++] = "-no-gcc";
209 for (i
= 1; i
< argc
; i
++, j
++)
211 if (i
== lang_c_here
)
212 new_argv
[j
++] = "-xc";
213 else if (i
== lang_S_here
)
214 new_argv
[j
++] = "-xassembler-with-cpp";
215 else if (i
== o_here
)
216 new_argv
[j
++] = "-o";
218 new_argv
[j
] = argv
[i
];
229 /* Called before linking. Returns 0 on success and -1 on failure. */
230 int lang_specific_pre_link ()
232 return 0; /* Not used for cpp. */
235 /* Number of extra output files that lang_specific_pre_link may generate. */
236 int lang_specific_extra_outfiles
= 0; /* Not used for cpp. */