1 /* Additional functions for the GCC driver on Darwin native.
2 Copyright (C) 2006-2021 Free Software Foundation, Inc.
3 Contributed by Apple Computer Inc.
5 This file is part of GCC.
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)
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.
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/>. */
22 #include "libiberty.h"
24 #include "coretypes.h"
27 #include "diagnostic-core.h"
29 /* Validate a version string (either given on the command line or, perhaps
30 as MACOSX_DEPLOYMENT_TARGET).
32 The specs %version-compare() function doesn't accept leading '0' on
33 numbers so strip them out. Do sanity checking here too.
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
39 * NULL means we didn't like what we saw.
43 validate_macosx_version_min (const char *version_str
)
46 unsigned long major
, minor
= 0, tiny
= 0;
48 const char *old_version
= version_str
;
49 bool need_rewrite
= false;
51 version_len
= strlen (version_str
);
52 if (version_len
< 2) /* The minimum would be 11 */
55 /* Version string must consist of digits and periods only. */
56 if (strspn (version_str
, "0123456789.") != version_len
)
59 if (!ISDIGIT (version_str
[0]) || !ISDIGIT (version_str
[version_len
- 1]))
62 if (version_str
[0] == '0')
65 major
= strtoul (version_str
, &end
, 10);
67 if (major
< 10 || major
> 11 ) /* MacOS 10 and 11 are known. */
70 /* Skip a separating period, if there's one. */
71 version_str
= end
+ ((*end
== '.') ? 1 : 0);
73 if (major
== 11 && *end
!= '\0' && !ISDIGIT (version_str
[0]))
74 /* For MacOS 11, we allow just the major number, but if the minor is
75 there it must be numeric. */
77 else if (major
== 11 && *end
== '\0')
78 /* We will rewrite 11 => 11.0.0. */
80 else if (major
== 10 && (*end
== '\0' || !ISDIGIT (version_str
[0])))
81 /* Otherwise, minor version components must be present and numeric. */
84 /* If we have one or more leading zeros on a component, then rewrite the
86 if (*end
!= '\0' && version_str
[0] == '0' && version_str
[1] != '\0'
87 && version_str
[1] != '.')
90 minor
= strtoul (version_str
, &end
, 10);
91 version_str
= end
+ ((*end
== '.') ? 1 : 0);
95 /* If 'tiny' is present it must be numeric. */
96 if (*end
!= '\0' && !ISDIGIT (version_str
[0]))
99 /* If we have one or more leading zeros on a component, then rewrite the
101 if (*end
!= '\0' && version_str
[0] == '0'
102 && version_str
[1] != '\0')
105 tiny
= strtoul (version_str
, &end
, 10);
109 /* Version string must contain no more than three tokens. */
116 asprintf (&new_version
, "%2lu.%lu.%lu", major
, minor
, tiny
);
123 #ifndef CROSS_DIRECTORY_STRUCTURE
124 #include <sys/sysctl.h>
127 /* Determine the version of the running OS.
128 We only look at the first two components (ignoring the patch one) and
129 report NN.MM.0 where NN is currently either 10 or 11 and MM is the OS
130 minor release number.
131 If we can't parse what the kernel gives us, warn the user, and do nothing. */
134 darwin_find_version_from_kernel (void)
137 size_t osversion_len
= sizeof (osversion
) - 1;
138 static int osversion_name
[2] = { CTL_KERN
, KERN_OSRELEASE
};
143 if (sysctl (osversion_name
, ARRAY_SIZE (osversion_name
), osversion
,
144 &osversion_len
, NULL
, 0) == -1)
146 warning (0, "%<sysctl%> for %<kern.osversion%> failed: %m");
150 /* Try to parse the first two parts of the OS version number. Warn
151 user and return if it doesn't make sense. */
152 if (! ISDIGIT (osversion
[0]))
154 major_vers
= osversion
[0] - '0';
155 version_p
= osversion
+ 1;
156 if (ISDIGIT (*version_p
))
157 major_vers
= major_vers
* 10 + (*version_p
++ - '0');
158 if (*version_p
++ != '.')
161 /* Darwin20 sees a transition to macOS 11. In this, it seems that the
162 mapping to macOS minor version is now shifted to the kernel minor
163 version - 1 (at least for the initial releases). At this stage, we
164 don't know what macOS version will correspond to Darwin21. */
165 if (major_vers
>= 20)
167 int minor_vers
= *version_p
++ - '0';
168 if (ISDIGIT (*version_p
))
169 minor_vers
= minor_vers
* 10 + (*version_p
++ - '0');
170 if (*version_p
++ != '.')
173 minor_vers
-= 1; /* Kernel 20.3 => macOS 11.2. */
174 /* It's not yet clear whether patch level will be considered. */
175 asprintf (&new_flag
, "11.%02d.00", minor_vers
);
177 else if (major_vers
- 4 <= 4)
178 /* On 10.4 and earlier, the old linker is used which does not
179 support three-component system versions.
180 FIXME: we should not assume this - a newer linker could be used. */
181 asprintf (&new_flag
, "10.%d", major_vers
- 4);
183 /* Although the newer linker supports three-component system
184 versions, there's no guarantee that the minor version component
185 of the kernel and the system are the same. Apple's clang always
186 uses 0 as the minor version: do the same. */
187 asprintf (&new_flag
, "10.%d.0", major_vers
- 4);
192 warning (0, "could not understand %<kern.osversion%> %q.*s",
193 (int) osversion_len
, osversion
);
198 /* When running on a Darwin system and using that system's headers and
199 libraries, default the -mmacosx-version-min flag to be the version
200 of the system on which the compiler is running.
202 When building cross or native cross compilers, default to the OSX
203 version of the target (as provided by the most specific target header
204 included in tm.h). This may be overidden by setting the flag explicitly
205 (or by the MACOSX_DEPLOYMENT_TARGET environment). */
208 darwin_default_min_version (void)
210 /* Try to retrieve the deployment target from the environment. */
211 const char *new_flag
= getenv ("MACOSX_DEPLOYMENT_TARGET");
213 /* Apparently, an empty string for MACOSX_DEPLOYMENT_TARGET means
214 "use the default". Or, possibly "use 10.1". We choose
215 to ignore the environment variable, as if it was never set. */
216 if (new_flag
== NULL
|| new_flag
[0] == 0)
217 #ifndef CROSS_DIRECTORY_STRUCTURE
218 /* Try to find the version from the kernel, if we fail - we print a
219 message and give up. */
220 new_flag
= darwin_find_version_from_kernel ();
222 /* For cross-compilers, default to a minimum version determined by
223 the configuration. */
224 new_flag
= DEF_MIN_OSX_VERSION
;
225 #endif /* CROSS_DIRECTORY_STRUCTURE */
227 if (new_flag
!= NULL
)
229 const char *checked
= validate_macosx_version_min (new_flag
);
232 warning (0, "could not understand version %qs", new_flag
);
235 new_flag
= xstrndup (checked
, strlen (checked
));
240 /* See if we can find the sysroot from the SDKROOT environment variable. */
243 maybe_get_sysroot_from_sdkroot ()
245 const char *maybe_sysroot
= getenv ("SDKROOT");
247 /* We'll use the same rules as the clang driver, for compatibility.
248 1) The path must be absolute
249 2) Ignore "/", that is the default anyway and we do not want the
250 sysroot semantics to be applied to it.
251 3) It must exist (actually, we'll check it's readable too). */
253 if (maybe_sysroot
== NULL
254 || *maybe_sysroot
!= '/'
255 || strlen (maybe_sysroot
) == 1
256 || access (maybe_sysroot
, R_OK
) == -1)
259 return xstrndup (maybe_sysroot
, strlen (maybe_sysroot
));
262 /* Handle the deduction of m32/m64 from -arch flags and the interactions
263 between them (i.e. try to warn a user who thinks that they have a driver
264 that can produce multi-slice "FAT" outputs with more than one arch).
265 Default the -mmacosx-version-min flag, which requires a system call on
269 darwin_driver_init (unsigned int *decoded_options_count
,
270 struct cl_decoded_option
**decoded_options
)
273 bool seenX86
= false;
274 bool seenX86_64
= false;
275 bool seenPPC
= false;
276 bool seenPPC64
= false;
277 bool seenM32
= false;
278 bool seenM64
= false;
279 bool appendM32
= false;
280 bool appendM64
= false;
281 const char *vers_string
= NULL
;
282 bool seen_version_min
= false;
283 bool seen_sysroot_p
= false;
285 for (i
= 1; i
< *decoded_options_count
; i
++)
287 if ((*decoded_options
)[i
].errors
& CL_ERR_MISSING_ARG
)
290 switch ((*decoded_options
)[i
].opt_index
)
293 /* Support provision of a single -arch xxxx flag as a means of
294 specifying the sub-target/multi-lib. Translate this into -m32/64
296 if (!strcmp ((*decoded_options
)[i
].arg
, "i386"))
298 else if (!strcmp ((*decoded_options
)[i
].arg
, "x86_64"))
300 else if (!strcmp ((*decoded_options
)[i
].arg
, "ppc"))
302 else if (!strcmp ((*decoded_options
)[i
].arg
, "ppc64"))
305 error ("this compiler does not support %qs",
306 (*decoded_options
)[i
].arg
);
307 /* Now we've examined it, drop the -arch arg. */
308 if (*decoded_options_count
> i
) {
309 memmove (*decoded_options
+ i
,
310 *decoded_options
+ i
+ 1,
311 ((*decoded_options_count
- i
- 1)
312 * sizeof (struct cl_decoded_option
)));
315 --*decoded_options_count
;
326 case OPT_mmacosx_version_min_
:
327 seen_version_min
= true;
329 validate_macosx_version_min ((*decoded_options
)[i
].arg
);
330 if (vers_string
== NULL
)
331 warning (0, "%qs is not valid for %<-mmacosx-version-min%>",
332 (*decoded_options
)[i
].arg
);
333 else if (vers_string
== (*decoded_options
)[i
].arg
)
334 vers_string
= xstrndup ((*decoded_options
)[i
].arg
, 32);
335 /* Now we've examined it, and verified/re-written, put it to
336 one side and append later. */
337 if (*decoded_options_count
> i
) {
338 memmove (*decoded_options
+ i
,
339 *decoded_options
+ i
+ 1,
340 ((*decoded_options_count
- i
- 1)
341 * sizeof (struct cl_decoded_option
)));
344 --*decoded_options_count
;
349 seen_sysroot_p
= true;
357 /* Turn -arch xxxx into the appropriate -m32/-m64 flag.
358 If the User tried to specify multiple arch flags (which is possible with
359 some Darwin compilers) warn that this mode is not supported by this
360 compiler. We take arch specifiers that agree with the default multilib
361 as the first choice and reject others. */
362 /* TODO: determine if these warnings would better be errors. */
364 if (seenPPC
|| seenPPC64
)
365 warning (0, "this compiler does not support PowerPC"
366 " (%<-arch%> option ignored)");
369 if (seenX86_64
|| seenM64
)
371 const char *op
= (seenX86_64
? "-arch x86_64": "-m64");
372 warning (0, "%qs conflicts with %<-arch i386%> (%qs ignored)",
375 if (! seenM32
) /* Add -m32 if the User didn't. */
381 warning (0, "%<-m32%> conflicts with %<-arch x86_64%>"
382 " (%<-m32%> ignored)");
383 if (! seenM64
) /* Add -m64 if the User didn't. */
387 if (seenX86
|| seenX86_64
)
388 warning (0, "this compiler does not support x86"
389 " (%<-arch%> option ignored)");
392 if (seenPPC64
|| seenM64
)
394 const char *op
= (seenPPC64
? "-arch ppc64": "-m64");
395 warning (0, "%qs conflicts with %<-arch ppc%> (%qs ignored)",
398 if (! seenM32
) /* Add -m32 if the User didn't. */
404 warning (0, "%<-m32%> conflicts with %<-arch ppc64%>"
405 " (%<-m32%> ignored)");
406 if (! seenM64
) /* Add -m64 if the User didn't. */
411 if (appendM32
|| appendM64
)
413 ++*decoded_options_count
;
414 *decoded_options
= XRESIZEVEC (struct cl_decoded_option
,
416 *decoded_options_count
);
417 generate_option (appendM32
? OPT_m32
: OPT_m64
, NULL
, 1, CL_DRIVER
,
418 &(*decoded_options
)[*decoded_options_count
- 1]);
421 if (! seen_sysroot_p
)
423 /* We will pick up an SDKROOT if we didn't specify a sysroot and treat
424 it as overriding any configure-time --with-sysroot. */
425 const char *sdkroot
= maybe_get_sysroot_from_sdkroot ();
428 ++*decoded_options_count
;
429 *decoded_options
= XRESIZEVEC (struct cl_decoded_option
,
431 *decoded_options_count
);
432 generate_option (OPT__sysroot_
, sdkroot
, 1, CL_DRIVER
,
433 &(*decoded_options
)[*decoded_options_count
- 1]);
437 /* We will need to know the OS X version we're trying to build for here
438 so that we can figure out the mechanism and source for the sysroot to
440 if (! seen_version_min
&& *decoded_options_count
> 1)
441 /* Not set by the User, try to figure it out. */
442 vers_string
= darwin_default_min_version ();
444 /* Create and push a cleaned up version, plus the major version for
445 assemblers and other cases that need it. */
446 if (vers_string
!= NULL
)
448 ++*decoded_options_count
;
449 *decoded_options
= XRESIZEVEC (struct cl_decoded_option
,
451 *decoded_options_count
);
452 generate_option (OPT_mmacosx_version_min_
, vers_string
, 1, CL_DRIVER
,
453 &(*decoded_options
)[*decoded_options_count
- 1]);
455 char *asm_major
= NULL
;
456 const char *first_period
= strchr(vers_string
, '.');
457 if (first_period
!= NULL
)
459 const char *second_period
= strchr(first_period
+1, '.');
460 if (second_period
!= NULL
)
461 asm_major
= xstrndup (vers_string
, second_period
-vers_string
);
463 asm_major
= xstrdup (vers_string
);
465 /* Else we appear to have a weird macosx version with no major number.
466 Punt on this for now. */
467 if (asm_major
!= NULL
)
469 ++*decoded_options_count
;
470 *decoded_options
= XRESIZEVEC (struct cl_decoded_option
,
472 *decoded_options_count
);
473 generate_option (OPT_asm_macosx_version_min_
, asm_major
, 1, CL_DRIVER
,
474 &(*decoded_options
)[*decoded_options_count
- 1]);