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1 : /* rustspec.c -- Specific flags and argument handling of the gcc Rust front end.
2 : Copyright (C) 2009-2026 Free Software Foundation, Inc.
3 :
4 : This file is part of GCC.
5 :
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 3, or (at your option) any later
9 : version.
10 :
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.
15 :
16 : You should have received a copy of the GNU General Public License
17 : along with GCC; see the file COPYING3. If not see
18 : <http://www.gnu.org/licenses/>. */
19 :
20 : #include "config.h"
21 : #include "system.h"
22 : #include "coretypes.h"
23 : #include "tm.h"
24 : #include "opts.h"
25 :
26 : // satisfy intellisense
27 : #include "options.h"
28 :
29 : /* This bit is set if we saw a `-xfoo' language specification. */
30 : #define LANGSPEC (1 << 1)
31 : /* This bit is set if they did `-lc'. */
32 : #define WITHLIBC (1 << 2)
33 : /* Skip this option. */
34 : #define SKIPOPT (1 << 3)
35 :
36 : void
37 5430 : lang_specific_driver (struct cl_decoded_option **in_decoded_options,
38 : unsigned int *in_decoded_options_count,
39 : int *in_added_libraries)
40 : {
41 5430 : unsigned int i, j;
42 :
43 : /* The new argument list will be contained in this. */
44 5430 : struct cl_decoded_option *new_decoded_options;
45 :
46 : /* "-lc" if it appears on the command line. */
47 5430 : const struct cl_decoded_option *saw_libc = 0;
48 :
49 : /* An array used to flag each argument that needs a bit set for
50 : LANGSPEC or WITHLIBC. */
51 5430 : int *args;
52 :
53 : /* True if we saw -static. */
54 5430 : int static_link = 0;
55 :
56 : /* True if we should add -shared-libgcc to the command-line. */
57 5430 : int shared_libgcc = 1;
58 :
59 : /* The total number of arguments with the new stuff. */
60 5430 : unsigned int argc;
61 :
62 : /* The argument list. */
63 5430 : struct cl_decoded_option *decoded_options;
64 :
65 : /* The number of libraries added in. */
66 5430 : int added_libraries;
67 :
68 : /* The total number of arguments with the new stuff. */
69 5430 : int num_args = 1;
70 :
71 : /* Whether the -o option was used. */
72 5430 : bool saw_opt_o = false;
73 :
74 : /* The first input file with an extension of .rs. */
75 5430 : const char *first_rust_file = NULL;
76 :
77 5430 : argc = *in_decoded_options_count;
78 5430 : decoded_options = *in_decoded_options;
79 5430 : added_libraries = *in_added_libraries;
80 :
81 5430 : args = XCNEWVEC (int, argc);
82 :
83 95347 : for (i = 1; i < argc; i++)
84 : {
85 89917 : const char *arg = decoded_options[i].arg;
86 :
87 89917 : switch (decoded_options[i].opt_index)
88 : {
89 1672 : case OPT_l:
90 1672 : if (strcmp (arg, "c") == 0)
91 0 : args[i] |= WITHLIBC;
92 : break;
93 :
94 : case OPT_o:
95 89917 : saw_opt_o = true;
96 : break;
97 :
98 0 : case OPT_static:
99 0 : static_link = 1;
100 0 : break;
101 :
102 0 : case OPT_static_libgcc:
103 0 : shared_libgcc = 0;
104 0 : break;
105 :
106 5430 : case OPT_SPECIAL_input_file:
107 5430 : if (first_rust_file == NULL)
108 : {
109 5430 : int len;
110 :
111 5430 : len = strlen (arg);
112 5430 : if (len > 3 && strcmp (arg + len - 3, ".rs") == 0)
113 4635 : first_rust_file = arg;
114 : }
115 : else
116 : {
117 : // FIXME: ARTHUR: Do we want to error here? If there's already one
118 : // file?
119 : // How do we error here? Do we want to instead just handle that in
120 : // the session manager?
121 : }
122 :
123 : break;
124 : }
125 : }
126 :
127 : /* There's no point adding -shared-libgcc if we don't have a shared
128 : libgcc. */
129 : #ifndef ENABLE_SHARED_LIBGCC
130 : shared_libgcc = 0;
131 : #endif
132 :
133 : /* Make sure to have room for the trailing NULL argument. */
134 5430 : num_args = argc + shared_libgcc * 5 + 10;
135 5430 : new_decoded_options = XNEWVEC (struct cl_decoded_option, num_args);
136 :
137 5430 : i = 0;
138 5430 : j = 0;
139 :
140 : /* Copy the 0th argument, i.e., the name of the program itself. */
141 5430 : new_decoded_options[j++] = decoded_options[i++];
142 :
143 : /* NOTE: We start at 1 now, not 0. */
144 95347 : while (i < argc)
145 : {
146 89917 : new_decoded_options[j] = decoded_options[i];
147 :
148 89917 : if (!saw_libc && (args[i] & WITHLIBC))
149 : {
150 0 : --j;
151 0 : saw_libc = &decoded_options[i];
152 : }
153 :
154 89917 : if ((args[i] & SKIPOPT) != 0)
155 0 : --j;
156 :
157 89917 : i++;
158 89917 : j++;
159 : }
160 :
161 : /* If we didn't see a -o option, add one. This is because we need
162 : the driver to pass all .rs files to crab1. Without a -o option the
163 : driver will invoke crab1 separately for each input file. FIXME:
164 : This should probably use some other interface to force the driver
165 : to set combine_inputs. */
166 5430 : if (!saw_opt_o)
167 : {
168 256 : generate_option (OPT_o, "a.out", 1, CL_DRIVER, &new_decoded_options[j]);
169 256 : j++;
170 : }
171 :
172 5430 : if (saw_libc)
173 0 : new_decoded_options[j++] = *saw_libc;
174 5430 : if (shared_libgcc && !static_link)
175 5430 : generate_option (OPT_shared_libgcc, NULL, 1, CL_DRIVER,
176 5430 : &new_decoded_options[j++]);
177 :
178 5430 : *in_decoded_options_count = j;
179 5430 : *in_decoded_options = new_decoded_options;
180 5430 : *in_added_libraries = added_libraries;
181 5430 : }
182 :
183 : /* Called before linking. Returns 0 on success and -1 on failure. */
184 : int
185 4857 : lang_specific_pre_link (void) /* Not used for Rust. */
186 : {
187 4857 : return 0;
188 : }
189 :
190 : /* Number of extra output files that lang_specific_pre_link may generate. */
191 : int lang_specific_extra_outfiles = 0; /* Not used for Rust. */
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