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bba14a07 | 1 | /* rustspec.c -- Specific flags and argument handling of the gcc Rust front end. |
a945c346 | 2 | Copyright (C) 2009-2024 Free Software Foundation, Inc. |
bba14a07 PH |
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 | lang_specific_driver (struct cl_decoded_option **in_decoded_options, | |
38 | unsigned int *in_decoded_options_count, | |
39 | int *in_added_libraries) | |
40 | { | |
41 | unsigned int i, j; | |
42 | ||
43 | /* The new argument list will be contained in this. */ | |
44 | struct cl_decoded_option *new_decoded_options; | |
45 | ||
46 | /* "-lc" if it appears on the command line. */ | |
47 | 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 | int *args; | |
52 | ||
53 | /* True if we saw -static. */ | |
54 | int static_link = 0; | |
55 | ||
56 | /* True if we should add -shared-libgcc to the command-line. */ | |
57 | int shared_libgcc = 1; | |
58 | ||
59 | /* The total number of arguments with the new stuff. */ | |
60 | unsigned int argc; | |
61 | ||
62 | /* The argument list. */ | |
63 | struct cl_decoded_option *decoded_options; | |
64 | ||
65 | /* The number of libraries added in. */ | |
66 | int added_libraries; | |
67 | ||
68 | /* The total number of arguments with the new stuff. */ | |
69 | int num_args = 1; | |
70 | ||
71 | /* Whether the -o option was used. */ | |
72 | bool saw_opt_o = false; | |
73 | ||
74 | /* The first input file with an extension of .rs. */ | |
75 | const char *first_rust_file = NULL; | |
76 | ||
77 | argc = *in_decoded_options_count; | |
78 | decoded_options = *in_decoded_options; | |
79 | added_libraries = *in_added_libraries; | |
80 | ||
81 | args = XCNEWVEC (int, argc); | |
82 | ||
83 | for (i = 1; i < argc; i++) | |
84 | { | |
85 | const char *arg = decoded_options[i].arg; | |
86 | ||
87 | switch (decoded_options[i].opt_index) | |
88 | { | |
89 | case OPT_l: | |
90 | if (strcmp (arg, "c") == 0) | |
91 | args[i] |= WITHLIBC; | |
92 | break; | |
93 | ||
94 | case OPT_o: | |
95 | saw_opt_o = true; | |
96 | break; | |
97 | ||
98 | case OPT_static: | |
99 | static_link = 1; | |
100 | break; | |
101 | ||
102 | case OPT_static_libgcc: | |
103 | shared_libgcc = 0; | |
104 | break; | |
105 | ||
106 | case OPT_SPECIAL_input_file: | |
107 | if (first_rust_file == NULL) | |
108 | { | |
109 | int len; | |
110 | ||
111 | len = strlen (arg); | |
112 | if (len > 3 && strcmp (arg + len - 3, ".rs") == 0) | |
113 | 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 | num_args = argc + shared_libgcc * 5 + 10; | |
135 | new_decoded_options = XNEWVEC (struct cl_decoded_option, num_args); | |
136 | ||
137 | i = 0; | |
138 | j = 0; | |
139 | ||
140 | /* Copy the 0th argument, i.e., the name of the program itself. */ | |
141 | new_decoded_options[j++] = decoded_options[i++]; | |
142 | ||
143 | /* NOTE: We start at 1 now, not 0. */ | |
144 | while (i < argc) | |
145 | { | |
146 | new_decoded_options[j] = decoded_options[i]; | |
147 | ||
148 | if (!saw_libc && (args[i] & WITHLIBC)) | |
149 | { | |
150 | --j; | |
151 | saw_libc = &decoded_options[i]; | |
152 | } | |
153 | ||
154 | if ((args[i] & SKIPOPT) != 0) | |
155 | --j; | |
156 | ||
157 | i++; | |
158 | 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 rust1. Without a -o option the | |
163 | driver will invoke rust1 separately for each input file. FIXME: | |
164 | This should probably use some other interface to force the driver | |
165 | to set combine_inputs. */ | |
166 | if (!saw_opt_o) | |
167 | { | |
168 | generate_option (OPT_o, "a.out", 1, CL_DRIVER, &new_decoded_options[j]); | |
169 | j++; | |
170 | } | |
171 | ||
172 | if (saw_libc) | |
173 | new_decoded_options[j++] = *saw_libc; | |
174 | if (shared_libgcc && !static_link) | |
175 | generate_option (OPT_shared_libgcc, NULL, 1, CL_DRIVER, | |
176 | &new_decoded_options[j++]); | |
177 | ||
178 | *in_decoded_options_count = j; | |
179 | *in_decoded_options = new_decoded_options; | |
180 | *in_added_libraries = added_libraries; | |
181 | } | |
182 | ||
183 | /* Called before linking. Returns 0 on success and -1 on failure. */ | |
184 | int | |
185 | lang_specific_pre_link (void) /* Not used for Rust. */ | |
186 | { | |
187 | 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. */ |