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3b426391 | 1 | /* Specific flags and argument handling of the C++ front end. |
99dee823 | 2 | Copyright (C) 1996-2021 Free Software Foundation, Inc. |
5b76d03b | 3 | |
f5adbb8d | 4 | This file is part of GCC. |
5b76d03b | 5 | |
f5adbb8d | 6 | GCC is free software; you can redistribute it and/or modify |
5b76d03b | 7 | it under the terms of the GNU General Public License as published by |
e77f031d | 8 | the Free Software Foundation; either version 3, or (at your option) |
5b76d03b BK |
9 | any later version. |
10 | ||
f5adbb8d | 11 | GCC is distributed in the hope that it will be useful, |
5b76d03b BK |
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. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
e77f031d NC |
17 | along with GCC; see the file COPYING3. If not see |
18 | <http://www.gnu.org/licenses/>. */ | |
5b76d03b | 19 | |
da20811c | 20 | #include "config.h" |
8d052bc7 | 21 | #include "system.h" |
4977bab6 ZW |
22 | #include "coretypes.h" |
23 | #include "tm.h" | |
d9d16a19 | 24 | #include "opts.h" |
2ba25f50 | 25 | |
f442f723 MS |
26 | /* This bit is set if we saw a `-xfoo' language specification. */ |
27 | #define LANGSPEC (1<<1) | |
28 | /* This bit is set if they did `-lm' or `-lmath'. */ | |
29 | #define MATHLIB (1<<2) | |
30 | /* This bit is set if they did `-lc'. */ | |
55ebb0d6 | 31 | #define WITHLIBC (1<<3) |
96be7a11 | 32 | /* Skip this option. */ |
55ebb0d6 | 33 | #define SKIPOPT (1<<4) |
f442f723 MS |
34 | |
35 | #ifndef MATH_LIBRARY | |
d9d16a19 | 36 | #define MATH_LIBRARY "m" |
f442f723 | 37 | #endif |
271f61fb | 38 | #ifndef MATH_LIBRARY_PROFILE |
61fec9ff | 39 | #define MATH_LIBRARY_PROFILE MATH_LIBRARY |
271f61fb | 40 | #endif |
f442f723 | 41 | |
18cd4ded | 42 | #ifndef LIBSTDCXX |
d9d16a19 | 43 | #define LIBSTDCXX "stdc++" |
18cd4ded | 44 | #endif |
271f61fb | 45 | #ifndef LIBSTDCXX_PROFILE |
4afd7f6c | 46 | #define LIBSTDCXX_PROFILE LIBSTDCXX |
271f61fb | 47 | #endif |
ce75e1dd | 48 | #ifndef LIBSTDCXX_STATIC |
a322799d | 49 | #define LIBSTDCXX_STATIC NULL |
ce75e1dd | 50 | #endif |
18cd4ded | 51 | |
662b9c55 IS |
52 | #ifndef LIBCXX |
53 | #define LIBCXX "c++" | |
54 | #endif | |
55 | #ifndef LIBCXX_PROFILE | |
56 | #define LIBCXX_PROFILE LIBCXX | |
57 | #endif | |
58 | #ifndef LIBCXX_STATIC | |
59 | #define LIBCXX_STATIC NULL | |
60 | #endif | |
61 | ||
62 | #ifndef LIBCXXABI | |
63 | #define LIBCXXABI "c++abi" | |
64 | #endif | |
65 | #ifndef LIBCXXABI_PROFILE | |
66 | #define LIBCXXABI_PROFILE LIBCXXABI | |
67 | #endif | |
68 | #ifndef LIBCXXABI_STATIC | |
69 | #define LIBCXXABI_STATIC NULL | |
70 | #endif | |
71 | ||
72 | /* The values used here must match those of the stdlib_kind enumeration | |
73 | in c.opt. */ | |
74 | enum stdcxxlib_kind | |
75 | { | |
76 | USE_LIBSTDCXX = 1, | |
77 | USE_LIBCXX = 2 | |
78 | }; | |
79 | ||
f442f723 | 80 | void |
d9d16a19 JM |
81 | lang_specific_driver (struct cl_decoded_option **in_decoded_options, |
82 | unsigned int *in_decoded_options_count, | |
5671bf27 | 83 | int *in_added_libraries) |
f442f723 | 84 | { |
d9d16a19 | 85 | unsigned int i, j; |
f442f723 | 86 | |
838dfd8a | 87 | /* If nonzero, the user gave us the `-p' or `-pg' flag. */ |
271f61fb DB |
88 | int saw_profile_flag = 0; |
89 | ||
662b9c55 IS |
90 | /* What action to take for the c++ runtime library: |
91 | -1 means we should not link it in. | |
92 | 0 means we should link it if it is needed. | |
93 | 1 means it is needed and should be linked in. | |
94 | 2 means it is needed but should be linked statically. */ | |
17211ab5 | 95 | int library = 0; |
f442f723 | 96 | |
662b9c55 IS |
97 | /* Which c++ runtime library to link. */ |
98 | stdcxxlib_kind which_library = USE_LIBSTDCXX; | |
99 | ||
f442f723 MS |
100 | /* The number of arguments being added to what's in argv, other than |
101 | libraries. We use this to track the number of times we've inserted | |
102 | -xc++/-xnone. */ | |
17211ab5 | 103 | int added = 0; |
f442f723 | 104 | |
f442f723 | 105 | /* The new argument list will be contained in this. */ |
d9d16a19 | 106 | struct cl_decoded_option *new_decoded_options; |
f442f723 | 107 | |
838dfd8a | 108 | /* Nonzero if we saw a `-xfoo' language specification on the |
f442f723 MS |
109 | command line. Used to avoid adding our own -xc++ if the user |
110 | already gave a language for the file. */ | |
111 | int saw_speclang = 0; | |
112 | ||
113 | /* "-lm" or "-lmath" if it appears on the command line. */ | |
d9d16a19 | 114 | const struct cl_decoded_option *saw_math = NULL; |
f442f723 | 115 | |
ff082cab RO |
116 | /* "-lrt" or eqivalent if it appears on the command line. */ |
117 | const struct cl_decoded_option *saw_time = NULL; | |
118 | ||
f442f723 | 119 | /* "-lc" if it appears on the command line. */ |
d9d16a19 | 120 | const struct cl_decoded_option *saw_libc = NULL; |
f442f723 MS |
121 | |
122 | /* An array used to flag each argument that needs a bit set for | |
55ebb0d6 | 123 | LANGSPEC, MATHLIB, or WITHLIBC. */ |
f442f723 MS |
124 | int *args; |
125 | ||
b54ccf71 JM |
126 | /* By default, we throw on the math library if we have one. */ |
127 | int need_math = (MATH_LIBRARY[0] != '\0'); | |
f442f723 | 128 | |
96be7a11 ILT |
129 | /* True if we saw -static. */ |
130 | int static_link = 0; | |
131 | ||
049f6ec9 MM |
132 | /* True if we should add -shared-libgcc to the command-line. */ |
133 | int shared_libgcc = 1; | |
134 | ||
f442f723 | 135 | /* The total number of arguments with the new stuff. */ |
d9d16a19 | 136 | unsigned int argc; |
f442f723 MS |
137 | |
138 | /* The argument list. */ | |
d9d16a19 | 139 | struct cl_decoded_option *decoded_options; |
f442f723 | 140 | |
84914634 JW |
141 | /* The number of libraries added in. */ |
142 | int added_libraries; | |
143 | ||
f442f723 | 144 | /* The total number of arguments with the new stuff. */ |
d9d16a19 | 145 | unsigned int num_args = 1; |
f442f723 | 146 | |
d9d16a19 JM |
147 | argc = *in_decoded_options_count; |
148 | decoded_options = *in_decoded_options; | |
84914634 | 149 | added_libraries = *in_added_libraries; |
f442f723 | 150 | |
67f5655f | 151 | args = XCNEWVEC (int, argc); |
f442f723 | 152 | |
1bf2b2d2 | 153 | for (i = 1; i < argc; i++) |
f442f723 | 154 | { |
d9d16a19 JM |
155 | const char *arg = decoded_options[i].arg; |
156 | if (decoded_options[i].errors & CL_ERR_MISSING_ARG) | |
157 | continue; /* Avoid examining arguments of options missing them. */ | |
f442f723 | 158 | |
d9d16a19 | 159 | switch (decoded_options[i].opt_index) |
f442f723 | 160 | { |
d9d16a19 JM |
161 | case OPT_nostdlib: |
162 | case OPT_nodefaultlibs: | |
163 | library = -1; | |
164 | break; | |
165 | ||
166 | case OPT_l: | |
167 | if (strcmp (arg, MATH_LIBRARY) == 0) | |
f442f723 MS |
168 | { |
169 | args[i] |= MATHLIB; | |
170 | need_math = 0; | |
171 | } | |
d9d16a19 | 172 | else if (strcmp (arg, "c") == 0) |
f442f723 | 173 | args[i] |= WITHLIBC; |
d9d16a19 JM |
174 | else |
175 | /* Unrecognized libraries (e.g. -lfoo) may require libstdc++. */ | |
176 | library = (library == 0) ? 1 : library; | |
177 | break; | |
178 | ||
179 | case OPT_pg: | |
180 | case OPT_p: | |
181 | saw_profile_flag++; | |
182 | break; | |
183 | ||
184 | case OPT_x: | |
185 | if (library == 0 | |
186 | && (strcmp (arg, "c++") == 0 | |
187 | || strcmp (arg, "c++-cpp-output") == 0 | |
188 | || strcmp (arg, "objective-c++") == 0 | |
189 | || strcmp (arg, "objective-c++-cpp-output") == 0)) | |
190 | library = 1; | |
a073516d | 191 | |
d9d16a19 JM |
192 | saw_speclang = 1; |
193 | break; | |
194 | ||
195 | case OPT_Xlinker: | |
196 | case OPT_Wl_: | |
01e05466 GK |
197 | /* Arguments that go directly to the linker might be .o files, |
198 | or something, and so might cause libstdc++ to be needed. */ | |
d9d16a19 JM |
199 | if (library == 0) |
200 | library = 1; | |
201 | break; | |
202 | ||
203 | case OPT_c: | |
0b7fb27b | 204 | case OPT_r: |
d9d16a19 JM |
205 | case OPT_S: |
206 | case OPT_E: | |
207 | case OPT_M: | |
208 | case OPT_MM: | |
209 | case OPT_fsyntax_only: | |
210 | /* Don't specify libraries if we won't link, since that would | |
211 | cause a warning. */ | |
212 | library = -1; | |
213 | break; | |
214 | ||
215 | case OPT_static: | |
216 | static_link = 1; | |
217 | break; | |
218 | ||
219 | case OPT_static_libgcc: | |
220 | shared_libgcc = 0; | |
221 | break; | |
222 | ||
223 | case OPT_static_libstdc__: | |
224 | library = library >= 0 ? 2 : library; | |
225 | args[i] |= SKIPOPT; | |
226 | break; | |
227 | ||
662b9c55 IS |
228 | case OPT_stdlib_: |
229 | which_library = (stdcxxlib_kind) decoded_options[i].value; | |
230 | break; | |
231 | ||
d9d16a19 JM |
232 | case OPT_SPECIAL_input_file: |
233 | { | |
234 | int len; | |
235 | ||
236 | /* We don't do this anymore, since we don't get them with minus | |
237 | signs on them. */ | |
238 | if (arg[0] == '\0' || arg[1] == '\0') | |
f442f723 | 239 | continue; |
f442f723 | 240 | |
d9d16a19 JM |
241 | if (saw_speclang) |
242 | { | |
243 | saw_speclang = 0; | |
244 | continue; | |
245 | } | |
246 | ||
247 | /* If the filename ends in .[chi], put options around it. | |
248 | But not if a specified -x option is currently active. */ | |
249 | len = strlen (arg); | |
250 | if (len > 2 | |
251 | && (arg[len - 1] == 'c' | |
252 | || arg[len - 1] == 'i' | |
253 | || arg[len - 1] == 'h') | |
254 | && arg[len - 2] == '.') | |
255 | { | |
256 | args[i] |= LANGSPEC; | |
257 | added += 2; | |
258 | } | |
259 | ||
260 | /* If we don't know that this is a header file, we might | |
261 | need to be linking in the libraries. */ | |
262 | if (library == 0) | |
263 | { | |
264 | if ((len <= 2 || strcmp (arg + (len - 2), ".H") != 0) | |
265 | && (len <= 2 || strcmp (arg + (len - 2), ".h") != 0) | |
266 | && (len <= 4 || strcmp (arg + (len - 4), ".hpp") != 0) | |
267 | && (len <= 3 || strcmp (arg + (len - 3), ".hp") != 0) | |
268 | && (len <= 4 || strcmp (arg + (len - 4), ".hxx") != 0) | |
269 | && (len <= 4 || strcmp (arg + (len - 4), ".h++") != 0) | |
270 | && (len <= 4 || strcmp (arg + (len - 4), ".HPP") != 0) | |
271 | && (len <= 4 || strcmp (arg + (len - 4), ".tcc") != 0) | |
272 | && (len <= 3 || strcmp (arg + (len - 3), ".hh") != 0)) | |
273 | library = 1; | |
274 | } | |
275 | } | |
276 | break; | |
f442f723 MS |
277 | } |
278 | } | |
279 | ||
049f6ec9 MM |
280 | /* There's no point adding -shared-libgcc if we don't have a shared |
281 | libgcc. */ | |
282 | #ifndef ENABLE_SHARED_LIBGCC | |
283 | shared_libgcc = 0; | |
284 | #endif | |
285 | ||
d9d16a19 JM |
286 | /* Add one for shared_libgcc or extra static library. */ |
287 | num_args = argc + added + need_math + (library > 0) * 4 + 1; | |
662b9c55 IS |
288 | /* For libc++, on most platforms, the ABI library (usually called libc++abi) |
289 | is provided as a separate DSO, which we must also append. | |
290 | However, a platform might have the ability to forward the ABI library | |
291 | from libc++, or combine it in some other way; in that case, LIBCXXABI | |
292 | should be set to NULL to signal that it need not be appended. */ | |
293 | if (which_library == USE_LIBCXX && LIBCXXABI != NULL) | |
294 | num_args += 4; | |
d9d16a19 | 295 | new_decoded_options = XNEWVEC (struct cl_decoded_option, num_args); |
f442f723 | 296 | |
834c6dff MM |
297 | i = 0; |
298 | j = 0; | |
c8094d83 | 299 | |
834c6dff | 300 | /* Copy the 0th argument, i.e., the name of the program itself. */ |
d9d16a19 | 301 | new_decoded_options[j++] = decoded_options[i++]; |
834c6dff | 302 | |
f442f723 | 303 | /* NOTE: We start at 1 now, not 0. */ |
834c6dff | 304 | while (i < argc) |
f442f723 | 305 | { |
d9d16a19 | 306 | new_decoded_options[j] = decoded_options[i]; |
f442f723 MS |
307 | |
308 | /* Make sure -lstdc++ is before the math library, since libstdc++ | |
309 | itself uses those math routines. */ | |
17211ab5 | 310 | if (!saw_math && (args[i] & MATHLIB) && library > 0) |
f442f723 MS |
311 | { |
312 | --j; | |
d9d16a19 | 313 | saw_math = &decoded_options[i]; |
f442f723 MS |
314 | } |
315 | ||
17211ab5 | 316 | if (!saw_libc && (args[i] & WITHLIBC) && library > 0) |
f442f723 MS |
317 | { |
318 | --j; | |
d9d16a19 | 319 | saw_libc = &decoded_options[i]; |
f442f723 MS |
320 | } |
321 | ||
17211ab5 | 322 | /* Wrap foo.[chi] files in a language specification to |
f442f723 MS |
323 | force the gcc compiler driver to run cc1plus on them. */ |
324 | if (args[i] & LANGSPEC) | |
325 | { | |
d9d16a19 JM |
326 | const char *arg = decoded_options[i].arg; |
327 | int len = strlen (arg); | |
328 | switch (arg[len - 1]) | |
17211ab5 GK |
329 | { |
330 | case 'c': | |
d9d16a19 JM |
331 | generate_option (OPT_x, "c++", 1, CL_DRIVER, |
332 | &new_decoded_options[j++]); | |
17211ab5 GK |
333 | break; |
334 | case 'i': | |
d9d16a19 JM |
335 | generate_option (OPT_x, "c++-cpp-output", 1, CL_DRIVER, |
336 | &new_decoded_options[j++]); | |
17211ab5 GK |
337 | break; |
338 | case 'h': | |
d9d16a19 JM |
339 | generate_option (OPT_x, "c++-header", 1, CL_DRIVER, |
340 | &new_decoded_options[j++]); | |
17211ab5 GK |
341 | break; |
342 | default: | |
8dc2b103 | 343 | gcc_unreachable (); |
17211ab5 | 344 | } |
d9d16a19 JM |
345 | new_decoded_options[j++] = decoded_options[i]; |
346 | generate_option (OPT_x, "none", 1, CL_DRIVER, | |
347 | &new_decoded_options[j]); | |
f442f723 | 348 | } |
f442f723 | 349 | |
96be7a11 ILT |
350 | if ((args[i] & SKIPOPT) != 0) |
351 | --j; | |
352 | ||
834c6dff MM |
353 | i++; |
354 | j++; | |
355 | } | |
eeb109f2 | 356 | |
f442f723 | 357 | /* Add `-lstdc++' if we haven't already done so. */ |
17211ab5 | 358 | if (library > 0) |
84914634 | 359 | { |
96be7a11 ILT |
360 | #ifdef HAVE_LD_STATIC_DYNAMIC |
361 | if (library > 1 && !static_link) | |
362 | { | |
c6092243 | 363 | generate_option (OPT_Wl_, LD_STATIC_OPTION, 1, CL_DRIVER, |
d9d16a19 | 364 | &new_decoded_options[j]); |
96be7a11 ILT |
365 | j++; |
366 | } | |
367 | #endif | |
662b9c55 IS |
368 | if (which_library == USE_LIBCXX) |
369 | { | |
370 | generate_option (OPT_l, | |
371 | saw_profile_flag ? LIBCXX_PROFILE : LIBCXX, 1, | |
372 | CL_DRIVER, &new_decoded_options[j]); | |
373 | if (LIBCXXABI != NULL) | |
374 | { | |
375 | j++; | |
376 | added_libraries++; | |
377 | generate_option (OPT_l, | |
378 | saw_profile_flag ? LIBCXXABI_PROFILE | |
379 | : LIBCXXABI, 1, | |
380 | CL_DRIVER, &new_decoded_options[j]); | |
381 | } | |
382 | } | |
383 | else | |
384 | generate_option (OPT_l, | |
385 | saw_profile_flag ? LIBSTDCXX_PROFILE : LIBSTDCXX, 1, | |
386 | CL_DRIVER, &new_decoded_options[j]); | |
d9d16a19 | 387 | added_libraries++; |
a322799d | 388 | j++; |
96be7a11 ILT |
389 | /* Add target-dependent static library, if necessary. */ |
390 | if ((static_link || library > 1) && LIBSTDCXX_STATIC != NULL) | |
391 | { | |
d9d16a19 JM |
392 | generate_option (OPT_l, LIBSTDCXX_STATIC, 1, |
393 | CL_DRIVER, &new_decoded_options[j]); | |
394 | added_libraries++; | |
96be7a11 ILT |
395 | j++; |
396 | } | |
397 | #ifdef HAVE_LD_STATIC_DYNAMIC | |
398 | if (library > 1 && !static_link) | |
399 | { | |
c6092243 | 400 | generate_option (OPT_Wl_, LD_DYNAMIC_OPTION, 1, CL_DRIVER, |
d9d16a19 | 401 | &new_decoded_options[j]); |
96be7a11 ILT |
402 | j++; |
403 | } | |
404 | #endif | |
84914634 | 405 | } |
f442f723 | 406 | if (saw_math) |
d9d16a19 | 407 | new_decoded_options[j++] = *saw_math; |
17211ab5 | 408 | else if (library > 0 && need_math) |
84914634 | 409 | { |
d9d16a19 JM |
410 | generate_option (OPT_l, |
411 | saw_profile_flag ? MATH_LIBRARY_PROFILE : MATH_LIBRARY, | |
412 | 1, CL_DRIVER, &new_decoded_options[j]); | |
413 | added_libraries++; | |
4afd7f6c | 414 | j++; |
84914634 | 415 | } |
ff082cab RO |
416 | if (saw_time) |
417 | new_decoded_options[j++] = *saw_time; | |
f442f723 | 418 | if (saw_libc) |
d9d16a19 | 419 | new_decoded_options[j++] = *saw_libc; |
96be7a11 | 420 | if (shared_libgcc && !static_link) |
d9d16a19 JM |
421 | generate_option (OPT_shared_libgcc, NULL, 1, CL_DRIVER, |
422 | &new_decoded_options[j++]); | |
f442f723 | 423 | |
d9d16a19 JM |
424 | *in_decoded_options_count = j; |
425 | *in_decoded_options = new_decoded_options; | |
84914634 | 426 | *in_added_libraries = added_libraries; |
f442f723 | 427 | } |
240661ba | 428 | |
c6002625 | 429 | /* Called before linking. Returns 0 on success and -1 on failure. */ |
bf9d3c27 | 430 | int lang_specific_pre_link (void) /* Not used for C++. */ |
240661ba PB |
431 | { |
432 | return 0; | |
433 | } | |
434 | ||
c6002625 KH |
435 | /* Number of extra output files that lang_specific_pre_link may generate. */ |
436 | int lang_specific_extra_outfiles = 0; /* Not used for C++. */ |