Mercurial > hg > CbC > CbC_gcc
annotate gcc/config/darwin-driver.c @ 145:1830386684a0
gcc-9.2.0
| author | anatofuz |
|---|---|
| date | Thu, 13 Feb 2020 11:34:05 +0900 |
| parents | 84e7813d76e9 |
| children |
| rev | line source |
|---|---|
| 0 | 1 /* Additional functions for the GCC driver on Darwin native. |
| 145 | 2 Copyright (C) 2006-2020 Free Software Foundation, Inc. |
| 0 | 3 Contributed by Apple Computer Inc. |
| 4 | |
| 5 This file is part of GCC. | |
| 6 | |
| 7 GCC is free software; you can redistribute it and/or modify | |
| 8 it under the terms of the GNU General Public License as published by | |
| 9 the Free Software Foundation; either version 3, or (at your option) | |
| 10 any later version. | |
| 11 | |
| 12 GCC is distributed in the hope that it will be useful, | |
| 13 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 15 GNU General Public License for more details. | |
| 16 | |
| 17 You should have received a copy of the GNU General Public License | |
| 18 along with GCC; see the file COPYING3. If not see | |
| 19 <http://www.gnu.org/licenses/>. */ | |
| 20 | |
| 21 #include "config.h" | |
| 111 | 22 #include "libiberty.h" |
| 0 | 23 #include "system.h" |
| 24 #include "coretypes.h" | |
| 25 #include "tm.h" | |
|
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26 #include "opts.h" |
| 111 | 27 #include "diagnostic-core.h" |
|
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28 |
| 145 | 29 /* Validate a version string (either given on the command line or, perhaps |
| 30 as MACOSX_DEPLOYMENT_TARGET). | |
| 31 | |
| 32 The specs %version-compare() function doesn't accept leading '0' on | |
| 33 numbers so strip them out. Do sanity checking here too. | |
| 34 | |
| 35 Return: | |
| 36 * original string means it was OK and we didn't want to change it. | |
| 37 * new string means it was OK but we rewrote it to avoid possible format | |
| 38 problems. | |
| 39 * NULL means we didn't like what we saw. | |
| 40 */ | |
| 41 | |
| 42 static const char * | |
| 43 validate_macosx_version_min (const char *version_str) | |
| 44 { | |
| 45 size_t version_len; | |
| 46 unsigned long major, minor, tiny = 0; | |
| 47 char *end; | |
| 48 const char *old_version = version_str; | |
| 49 bool need_rewrite = false; | |
| 50 | |
| 51 version_len = strlen (version_str); | |
| 52 if (version_len < 4) /* The minimum would be 10.x */ | |
| 53 return NULL; | |
| 54 | |
| 55 /* Version string must consist of digits and periods only. */ | |
| 56 if (strspn (version_str, "0123456789.") != version_len) | |
| 57 return NULL; | |
| 58 | |
| 59 if (!ISDIGIT (version_str[0]) || !ISDIGIT (version_str[version_len - 1])) | |
| 60 return NULL; | |
| 61 | |
| 62 if (version_str[0] == '0') | |
| 63 need_rewrite = true; | |
| 64 | |
| 65 major = strtoul (version_str, &end, 10); | |
| 66 version_str = end + ((*end == '.') ? 1 : 0); | |
| 67 | |
| 68 if (major != 10) /* So far .. all MacOS 10 ... */ | |
| 69 return NULL; | |
| 70 | |
| 71 /* Version string components must be present and numeric. */ | |
| 72 if (!ISDIGIT (version_str[0])) | |
| 73 return NULL; | |
| 74 | |
| 75 /* If we have one or more leading zeros on a component, then rewrite the | |
| 76 version string. */ | |
| 77 if (version_str[0] == '0' && version_str[1] != '\0' | |
| 78 && version_str[1] != '.') | |
| 79 need_rewrite = true; | |
| 80 | |
| 81 minor = strtoul (version_str, &end, 10); | |
| 82 version_str = end + ((*end == '.') ? 1 : 0); | |
| 83 if (minor > 99) | |
| 84 return NULL; | |
| 85 | |
| 86 /* If 'tiny' is present it must be numeric. */ | |
| 87 if (*end != '\0' && !ISDIGIT (version_str[0])) | |
| 88 return NULL; | |
| 89 | |
| 90 /* If we have one or more leading zeros on a component, then rewrite the | |
| 91 version string. */ | |
| 92 if (*end != '\0' && version_str[0] == '0' | |
| 93 && version_str[1] != '\0') | |
| 94 need_rewrite = true; | |
| 95 | |
| 96 tiny = strtoul (version_str, &end, 10); | |
| 97 if (tiny > 99) | |
| 98 return NULL; | |
| 99 | |
| 100 /* Version string must contain no more than three tokens. */ | |
| 101 if (*end != '\0') | |
| 102 return NULL; | |
| 103 | |
| 104 if (need_rewrite) | |
| 105 { | |
| 106 char *new_version; | |
| 107 asprintf (&new_version, "10.%lu.%lu", minor, tiny); | |
| 108 return new_version; | |
| 109 } | |
| 110 | |
| 111 return old_version; | |
| 112 } | |
| 113 | |
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114 #ifndef CROSS_DIRECTORY_STRUCTURE |
| 0 | 115 #include <sys/sysctl.h> |
| 116 #include "xregex.h" | |
| 117 | |
| 111 | 118 static char * |
| 119 darwin_find_version_from_kernel (void) | |
| 0 | 120 { |
| 121 char osversion[32]; | |
| 122 size_t osversion_len = sizeof (osversion) - 1; | |
| 123 static int osversion_name[2] = { CTL_KERN, KERN_OSRELEASE }; | |
| 111 | 124 int major_vers; |
| 0 | 125 char * version_p; |
| 111 | 126 char * new_flag; |
| 0 | 127 |
| 128 /* Determine the version of the running OS. If we can't, warn user, | |
| 129 and do nothing. */ | |
| 130 if (sysctl (osversion_name, ARRAY_SIZE (osversion_name), osversion, | |
| 131 &osversion_len, NULL, 0) == -1) | |
| 132 { | |
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133 warning (0, "sysctl for kern.osversion failed: %m"); |
| 111 | 134 return NULL; |
| 0 | 135 } |
| 136 | |
| 137 /* Try to parse the first two parts of the OS version number. Warn | |
| 138 user and return if it doesn't make sense. */ | |
| 139 if (! ISDIGIT (osversion[0])) | |
| 140 goto parse_failed; | |
| 141 major_vers = osversion[0] - '0'; | |
| 142 version_p = osversion + 1; | |
| 143 if (ISDIGIT (*version_p)) | |
| 144 major_vers = major_vers * 10 + (*version_p++ - '0'); | |
| 145 if (*version_p++ != '.') | |
| 146 goto parse_failed; | |
| 147 | |
| 148 /* The major kernel version number is 4 plus the second OS version | |
| 149 component. */ | |
| 150 if (major_vers - 4 <= 4) | |
| 151 /* On 10.4 and earlier, the old linker is used which does not | |
| 111 | 152 support three-component system versions. |
| 153 FIXME: we should not assume this - a newer linker could be used. */ | |
| 154 asprintf (&new_flag, "10.%d", major_vers - 4); | |
| 0 | 155 else |
| 111 | 156 /* Although the newer linker supports three-component system |
| 157 versions, there's no guarantee that the minor version component | |
| 158 of the kernel and the system are the same. Apple's clang always | |
| 159 uses 0 as the minor version: do the same. */ | |
| 160 asprintf (&new_flag, "10.%d.0", major_vers - 4); | |
| 0 | 161 |
| 111 | 162 return new_flag; |
| 163 | |
| 0 | 164 parse_failed: |
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165 warning (0, "couldn%'t understand kern.osversion %q.*s", |
| 0 | 166 (int) osversion_len, osversion); |
| 111 | 167 return NULL; |
| 0 | 168 } |
| 111 | 169 #endif |
| 0 | 170 |
| 111 | 171 /* When running on a Darwin system and using that system's headers and |
| 172 libraries, default the -mmacosx-version-min flag to be the version | |
| 173 of the system on which the compiler is running. | |
| 174 | |
| 175 When building cross or native cross compilers, default to the OSX | |
| 176 version of the target (as provided by the most specific target header | |
| 177 included in tm.h). This may be overidden by setting the flag explicitly | |
| 178 (or by the MACOSX_DEPLOYMENT_TARGET environment). */ | |
| 179 | |
| 180 static const char * | |
| 181 darwin_default_min_version (void) | |
| 182 { | |
| 183 /* Try to retrieve the deployment target from the environment. */ | |
| 184 const char *new_flag = getenv ("MACOSX_DEPLOYMENT_TARGET"); | |
| 185 | |
| 186 /* Apparently, an empty string for MACOSX_DEPLOYMENT_TARGET means | |
| 187 "use the default". Or, possibly "use 10.1". We choose | |
| 188 to ignore the environment variable, as if it was never set. */ | |
| 189 if (new_flag == NULL || new_flag[0] == 0) | |
| 190 #ifndef CROSS_DIRECTORY_STRUCTURE | |
| 191 /* Try to find the version from the kernel, if we fail - we print a | |
| 192 message and give up. */ | |
| 193 new_flag = darwin_find_version_from_kernel (); | |
| 194 #else | |
| 195 /* For cross-compilers, default to a minimum version determined by | |
| 196 the configuration. */ | |
| 197 new_flag = DEF_MIN_OSX_VERSION; | |
| 0 | 198 #endif /* CROSS_DIRECTORY_STRUCTURE */ |
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199 |
| 111 | 200 if (new_flag != NULL) |
| 201 { | |
| 145 | 202 const char *checked = validate_macosx_version_min (new_flag); |
| 203 if (checked == NULL) | |
| 204 { | |
| 205 warning (0, "couldn%'t understand version %s", new_flag); | |
| 206 return NULL; | |
| 207 } | |
| 208 new_flag = xstrndup (checked, strlen (checked)); | |
| 111 | 209 } |
| 210 return new_flag; | |
| 211 } | |
| 212 | |
| 145 | 213 /* See if we can find the sysroot from the SDKROOT environment variable. */ |
| 214 | |
| 215 static const char * | |
| 216 maybe_get_sysroot_from_sdkroot () | |
| 217 { | |
| 218 const char *maybe_sysroot = getenv ("SDKROOT"); | |
| 219 | |
| 220 /* We'll use the same rules as the clang driver, for compatibility. | |
| 221 1) The path must be absolute | |
| 222 2) Ignore "/", that is the default anyway and we do not want the | |
| 223 sysroot semantics to be applied to it. | |
| 224 3) It must exist (actually, we'll check it's readable too). */ | |
| 225 | |
| 226 if (maybe_sysroot == NULL | |
| 227 || *maybe_sysroot != '/' | |
| 228 || strlen (maybe_sysroot) == 1 | |
| 229 || access (maybe_sysroot, R_OK) == -1) | |
| 230 return NULL; | |
| 231 | |
| 232 return xstrndup (maybe_sysroot, strlen (maybe_sysroot)); | |
| 233 } | |
| 234 | |
|
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235 /* Translate -filelist and -framework options in *DECODED_OPTIONS |
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236 (size *DECODED_OPTIONS_COUNT) to use -Xlinker so that they are |
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237 considered to be linker inputs in the case that no other inputs are |
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238 specified. Handling these options in DRIVER_SELF_SPECS does not |
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239 suffice because specs are too late to add linker inputs, and |
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240 handling them in LINK_SPEC does not suffice because the linker will |
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241 not be called if there are no other inputs. When native, also |
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242 default the -mmacosx-version-min flag. */ |
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243 |
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244 void |
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245 darwin_driver_init (unsigned int *decoded_options_count, |
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246 struct cl_decoded_option **decoded_options) |
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247 { |
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248 unsigned int i; |
| 111 | 249 bool seenX86 = false; |
| 250 bool seenX86_64 = false; | |
| 251 bool seenPPC = false; | |
| 252 bool seenPPC64 = false; | |
| 253 bool seenM32 = false; | |
| 254 bool seenM64 = false; | |
| 255 bool appendM32 = false; | |
| 256 bool appendM64 = false; | |
| 257 const char *vers_string = NULL; | |
| 258 bool seen_version_min = false; | |
| 145 | 259 bool seen_sysroot_p = false; |
|
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260 |
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261 for (i = 1; i < *decoded_options_count; i++) |
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262 { |
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263 if ((*decoded_options)[i].errors & CL_ERR_MISSING_ARG) |
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264 continue; |
| 111 | 265 |
|
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266 switch ((*decoded_options)[i].opt_index) |
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267 { |
| 111 | 268 case OPT_arch: |
| 269 /* Support provision of a single -arch xxxx flag as a means of | |
| 270 specifying the sub-target/multi-lib. Translate this into -m32/64 | |
| 271 as appropriate. */ | |
| 272 if (!strcmp ((*decoded_options)[i].arg, "i386")) | |
| 273 seenX86 = true; | |
| 274 else if (!strcmp ((*decoded_options)[i].arg, "x86_64")) | |
| 275 seenX86_64 = true; | |
| 276 else if (!strcmp ((*decoded_options)[i].arg, "ppc")) | |
| 277 seenPPC = true; | |
| 278 else if (!strcmp ((*decoded_options)[i].arg, "ppc64")) | |
| 279 seenPPC64 = true; | |
| 280 else | |
| 281 error ("this compiler does not support %s", | |
| 282 (*decoded_options)[i].arg); | |
| 283 /* Now we've examined it, drop the -arch arg. */ | |
| 284 if (*decoded_options_count > i) { | |
| 285 memmove (*decoded_options + i, | |
| 286 *decoded_options + i + 1, | |
| 145 | 287 ((*decoded_options_count - i - 1) |
| 111 | 288 * sizeof (struct cl_decoded_option))); |
| 289 } | |
| 290 --i; | |
| 291 --*decoded_options_count; | |
| 292 break; | |
| 293 | |
| 294 case OPT_m32: | |
| 295 seenM32 = true; | |
| 296 break; | |
| 297 | |
| 298 case OPT_m64: | |
| 299 seenM64 = true; | |
| 300 break; | |
| 301 | |
|
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302 case OPT_filelist: |
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303 case OPT_framework: |
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304 ++*decoded_options_count; |
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305 *decoded_options = XRESIZEVEC (struct cl_decoded_option, |
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306 *decoded_options, |
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307 *decoded_options_count); |
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308 memmove (*decoded_options + i + 2, |
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309 *decoded_options + i + 1, |
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310 ((*decoded_options_count - i - 2) |
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311 * sizeof (struct cl_decoded_option))); |
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312 generate_option (OPT_Xlinker, (*decoded_options)[i].arg, 1, |
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313 CL_DRIVER, &(*decoded_options)[i + 1]); |
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314 generate_option (OPT_Xlinker, |
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315 (*decoded_options)[i].canonical_option[0], 1, |
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316 CL_DRIVER, &(*decoded_options)[i]); |
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317 break; |
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318 |
| 111 | 319 case OPT_mmacosx_version_min_: |
| 320 seen_version_min = true; | |
| 145 | 321 vers_string = |
| 322 validate_macosx_version_min ((*decoded_options)[i].arg); | |
| 323 if (vers_string == NULL) | |
| 324 warning (0, "%qs is not valid for %<mmacosx-version-min%>", | |
| 325 (*decoded_options)[i].arg); | |
| 326 else if (vers_string == (*decoded_options)[i].arg) | |
| 327 vers_string = xstrndup ((*decoded_options)[i].arg, 32); | |
| 328 /* Now we've examined it, and verified/re-written, put it to | |
| 329 one side and append later. */ | |
| 330 if (*decoded_options_count > i) { | |
| 331 memmove (*decoded_options + i, | |
| 332 *decoded_options + i + 1, | |
| 333 ((*decoded_options_count - i - 1) | |
| 334 * sizeof (struct cl_decoded_option))); | |
| 335 } | |
| 336 --i; | |
| 337 --*decoded_options_count; | |
| 338 break; | |
| 339 | |
| 340 case OPT__sysroot_: | |
| 341 case OPT_isysroot: | |
| 342 seen_sysroot_p = true; | |
| 343 break; | |
| 111 | 344 |
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345 default: |
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346 break; |
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347 } |
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348 } |
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349 |
| 111 | 350 /* Turn -arch xxxx into the appropriate -m32/-m64 flag. |
| 351 If the User tried to specify multiple arch flags (which is possible with | |
| 352 some Darwin compilers) warn that this mode is not supported by this | |
| 353 compiler (and ignore the arch flags, which means that the default multi- | |
| 354 lib will be generated). */ | |
| 355 /* TODO: determine if these warnings would better be errors. */ | |
| 356 #if DARWIN_X86 | |
| 357 if (seenPPC || seenPPC64) | |
| 358 warning (0, "this compiler does not support PowerPC (arch flags ignored)"); | |
| 359 if (seenX86) | |
| 360 { | |
| 361 if (seenX86_64 || seenM64) | |
| 362 warning (0, "%s conflicts with i386 (arch flags ignored)", | |
| 363 (seenX86_64? "x86_64": "m64")); | |
| 364 else if (! seenM32) /* Add -m32 if the User didn't. */ | |
| 365 appendM32 = true; | |
| 366 } | |
| 367 else if (seenX86_64) | |
| 368 { | |
| 369 if (seenX86 || seenM32) | |
| 370 warning (0, "%s conflicts with x86_64 (arch flags ignored)", | |
| 371 (seenX86? "i386": "m32")); | |
| 372 else if (! seenM64) /* Add -m64 if the User didn't. */ | |
| 373 appendM64 = true; | |
| 374 } | |
| 375 #elif DARWIN_PPC | |
| 376 if (seenX86 || seenX86_64) | |
| 377 warning (0, "this compiler does not support X86 (arch flags ignored)"); | |
| 378 if (seenPPC) | |
| 379 { | |
| 380 if (seenPPC64 || seenM64) | |
| 381 warning (0, "%s conflicts with ppc (arch flags ignored)", | |
| 382 (seenPPC64? "ppc64": "m64")); | |
| 383 else if (! seenM32) /* Add -m32 if the User didn't. */ | |
| 384 appendM32 = true; | |
| 385 } | |
| 386 else if (seenPPC64) | |
| 387 { | |
| 388 if (seenPPC || seenM32) | |
| 389 warning (0, "%s conflicts with ppc64 (arch flags ignored)", | |
| 390 (seenPPC? "ppc": "m32")); | |
| 391 else if (! seenM64) /* Add -m64 if the User didn't. */ | |
| 392 appendM64 = true; | |
| 393 } | |
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394 #endif |
| 111 | 395 |
| 396 if (appendM32 || appendM64) | |
| 397 { | |
| 398 ++*decoded_options_count; | |
| 399 *decoded_options = XRESIZEVEC (struct cl_decoded_option, | |
| 400 *decoded_options, | |
| 401 *decoded_options_count); | |
| 402 generate_option (appendM32 ? OPT_m32 : OPT_m64, NULL, 1, CL_DRIVER, | |
| 403 &(*decoded_options)[*decoded_options_count - 1]); | |
| 404 } | |
| 405 | |
| 145 | 406 if (! seen_sysroot_p) |
| 111 | 407 { |
| 145 | 408 /* We will pick up an SDKROOT if we didn't specify a sysroot and treat |
| 409 it as overriding any configure-time --with-sysroot. */ | |
| 410 const char *sdkroot = maybe_get_sysroot_from_sdkroot (); | |
| 411 if (sdkroot) | |
| 111 | 412 { |
| 413 ++*decoded_options_count; | |
| 414 *decoded_options = XRESIZEVEC (struct cl_decoded_option, | |
| 415 *decoded_options, | |
| 416 *decoded_options_count); | |
| 145 | 417 generate_option (OPT__sysroot_, sdkroot, 1, CL_DRIVER, |
| 418 &(*decoded_options)[*decoded_options_count - 1]); | |
| 111 | 419 } |
| 420 } | |
| 145 | 421 |
| 422 /* We will need to know the OS X version we're trying to build for here | |
| 423 so that we can figure out the mechanism and source for the sysroot to | |
| 424 be used. */ | |
| 425 if (! seen_version_min && *decoded_options_count > 1) | |
| 426 /* Not set by the User, try to figure it out. */ | |
| 427 vers_string = darwin_default_min_version (); | |
| 428 | |
| 429 /* Create and push a cleaned up version, plus the major version for | |
| 430 assemblers and other cases that need it. */ | |
| 111 | 431 if (vers_string != NULL) |
| 432 { | |
| 145 | 433 ++*decoded_options_count; |
| 434 *decoded_options = XRESIZEVEC (struct cl_decoded_option, | |
| 435 *decoded_options, | |
| 436 *decoded_options_count); | |
| 437 generate_option (OPT_mmacosx_version_min_, vers_string, 1, CL_DRIVER, | |
| 438 &(*decoded_options)[*decoded_options_count - 1]); | |
| 439 | |
| 111 | 440 char *asm_major = NULL; |
| 441 const char *first_period = strchr(vers_string, '.'); | |
| 442 if (first_period != NULL) | |
| 443 { | |
| 444 const char *second_period = strchr(first_period+1, '.'); | |
| 445 if (second_period != NULL) | |
| 446 asm_major = xstrndup (vers_string, second_period-vers_string); | |
| 447 else | |
| 448 asm_major = xstrdup (vers_string); | |
| 449 } | |
| 450 /* Else we appear to have a weird macosx version with no major number. | |
| 451 Punt on this for now. */ | |
| 452 if (asm_major != NULL) | |
| 453 { | |
| 454 ++*decoded_options_count; | |
| 455 *decoded_options = XRESIZEVEC (struct cl_decoded_option, | |
| 456 *decoded_options, | |
| 457 *decoded_options_count); | |
| 458 generate_option (OPT_asm_macosx_version_min_, asm_major, 1, CL_DRIVER, | |
| 459 &(*decoded_options)[*decoded_options_count - 1]); | |
| 460 } | |
| 461 } | |
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462 } |