1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
|
/* Specific flags and argument handling of the C preprocessor.
Copyright (C) 1999-2014 Free Software Foundation, Inc.
This file is part of GCC.
GCC 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 3, or (at your option) any later
version.
GCC 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 GCC; see the file COPYING3. If not see
<http://www.gnu.org/licenses/>. */
#include "config.h"
#include "system.h"
#include "coretypes.h"
#include "tm.h"
#include "gcc.h"
#include "opts.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. */
/* 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++",
".sx",
NULL
};
/* Filter the command line before processing by the gcc driver proper. */
void
lang_specific_driver (struct cl_decoded_option **in_decoded_options,
unsigned int *in_decoded_options_count,
int *in_added_libraries ATTRIBUTE_UNUSED)
{
struct cl_decoded_option *decoded_options = *in_decoded_options;
unsigned int argc = *in_decoded_options_count;
/* Do we need to read stdin? */
int read_stdin = 1;
/* Do we need to insert -E? */
int need_E = 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. */
unsigned int lang_c_here = 0;
unsigned int lang_S_here = 0;
unsigned int o_here = 0;
/* Do we need to fix up an input file with an unrecognized suffix? */
int need_fixups = 1;
unsigned int i, j;
struct cl_decoded_option *new_decoded_options;
unsigned int new_argc;
extern int is_cpp_driver;
is_cpp_driver = 1;
/* 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++)
{
switch (decoded_options[i].opt_index)
{
case OPT_E:
need_E = 0;
break;
case OPT_S:
case OPT_c:
fatal_error ("%qs is not a valid option to the preprocessor",
decoded_options[i].orig_option_with_args_text);
return;
case OPT_x:
need_fixups = 0;
break;
case OPT_SPECIAL_input_file:
{
const char *file = decoded_options[i].arg;
if (strcmp (file, "-") == 0)
read_stdin = 0;
else
{
seen_input++;
if (seen_input == 3)
{
fatal_error ("too many input files");
return;
}
else if (seen_input == 2)
{
o_here = i;
}
else
{
read_stdin = 0;
if (need_fixups)
{
int l = strlen (file);
int known = 0;
const char *const *suff;
for (suff = known_suffixes; *suff; suff++)
if (!strcmp (*suff, &file[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", &file[l - 2]))
lang_S_here = i;
else
lang_c_here = i;
}
}
}
}
}
break;
}
}
/* If we don't need to edit the command line, we can bail early. */
new_argc = argc + need_E + read_stdin + !!lang_c_here + !!lang_S_here;
if (new_argc == argc && !o_here)
return;
new_decoded_options = XNEWVEC (struct cl_decoded_option, new_argc);
new_decoded_options[0] = decoded_options[0];
j = 1;
if (need_E)
generate_option (OPT_E, NULL, 1, CL_DRIVER, &new_decoded_options[j++]);
for (i = 1; i < argc; i++, j++)
{
if (i == lang_c_here)
generate_option (OPT_x, "c", 1, CL_DRIVER, &new_decoded_options[j++]);
else if (i == lang_S_here)
generate_option (OPT_x, "assembler-with-cpp", 1, CL_DRIVER,
&new_decoded_options[j++]);
else if (i == o_here)
{
generate_option (OPT_o, decoded_options[i].arg, 1, CL_DRIVER,
&new_decoded_options[j]);
continue;
}
new_decoded_options[j] = decoded_options[i];
}
if (read_stdin)
generate_option_input_file ("-", &new_decoded_options[j++]);
*in_decoded_options_count = new_argc;
*in_decoded_options = new_decoded_options;
}
/* Called before linking. Returns 0 on success and -1 on failure. */
int lang_specific_pre_link (void)
{
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. */
|
