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
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") \
56 || !strcmp (STR, "MF") || !strcmp (STR, "MT") || !strcmp (STR, "MQ"))
58 #ifndef WORD_SWITCH_TAKES_ARG
59 #define WORD_SWITCH_TAKES_ARG(STR) DEFAULT_WORD_SWITCH_TAKES_ARG (STR)
62 /* Suffixes for known sorts of input files. Note that we do not list
63 files which are normally considered to have been preprocessed already,
64 since the user's expectation is that `cpp' always preprocesses. */
65 static const char *const known_suffixes
[] =
67 ".c", ".C", ".S", ".m",
68 ".cc", ".cxx", ".cpp", ".cp", ".c++",
72 /* Filter argc and argv before processing by the gcc driver proper. */
74 lang_specific_driver (in_argc
, in_argv
, in_added_libraries
)
76 const char *const **in_argv
;
77 int *in_added_libraries ATTRIBUTE_UNUSED
;
80 const char *const *argv
= *in_argv
;
82 /* Do we need to read stdin? */
85 /* Do we need to insert -E? */
88 /* Do we need to insert -no-gcc? */
91 /* Have we seen an input file? */
94 /* Positions to insert -xc, -xassembler-with-cpp, and -o, if necessary.
95 0 means unnecessary. */
100 /* Do we need to fix up an input file with an unrecognized suffix? */
104 const char **new_argv
;
106 extern int is_cpp_driver
;
110 /* First pass. If we see an -S or -c, barf. If we see an input file,
111 turn off read_stdin. If we see a second input file, it is actually
112 the output file. If we see a third input file, barf. */
113 for (i
= 1; i
< argc
; i
++)
121 if (argv
[i
][0] == '-')
123 if (argv
[i
][1] == '\0')
125 else if (argv
[i
][2] == '\0')
127 if (argv
[i
][1] == 'E')
129 else if (argv
[i
][1] == 'S' || argv
[i
][1] == 'c')
131 fatal ("\"%s\" is not a valid option to the preprocessor",
135 else if (argv
[i
][1] == 'x')
140 else if (SWITCH_TAKES_ARG (argv
[i
][1]))
143 else if (argv
[i
][1] == 'x')
145 else if (argv
[i
][1] == 'g' && !strcmp(&argv
[i
][2], "cc"))
147 else if (WORD_SWITCH_TAKES_ARG (&argv
[i
][1]))
150 else /* not an option */
155 fatal ("too many input files");
158 else if (seen_input
== 2)
167 int l
= strlen (argv
[i
]);
169 const char *const *suff
;
171 for (suff
= known_suffixes
; *suff
; suff
++)
172 if (!strcmp (*suff
, &argv
[i
][l
- strlen(*suff
)]))
180 /* .s files are a special case; we have to treat
181 them like .S files so -D__ASSEMBLER__ will be
183 if (!strcmp (".s", &argv
[i
][l
- 2]))
193 /* If we don't need to edit the command line, we can bail early. */
195 new_argc
= argc
+ need_E
+ need_no_gcc
+ read_stdin
196 + !!o_here
+ !!lang_c_here
+ !!lang_S_here
;
198 if (new_argc
== argc
)
201 /* One more slot for a terminating null. */
202 new_argv
= (const char **) xmalloc ((new_argc
+ 1) * sizeof(char *));
204 new_argv
[0] = argv
[0];
208 new_argv
[j
++] = "-E";
211 new_argv
[j
++] = "-no-gcc";
213 for (i
= 1; i
< argc
; i
++, j
++)
215 if (i
== lang_c_here
)
216 new_argv
[j
++] = "-xc";
217 else if (i
== lang_S_here
)
218 new_argv
[j
++] = "-xassembler-with-cpp";
219 else if (i
== o_here
)
220 new_argv
[j
++] = "-o";
222 new_argv
[j
] = argv
[i
];
233 /* Called before linking. Returns 0 on success and -1 on failure. */
234 int lang_specific_pre_link ()
236 return 0; /* Not used for cpp. */
239 /* Number of extra output files that lang_specific_pre_link may generate. */
240 int lang_specific_extra_outfiles
= 0; /* Not used for cpp. */