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1 | /* |
2 | * Copyright 1993, 1995 Christopher Seiwald. | |
3 | * | |
4 | * This file is part of Jam - see jam.c for Copyright information. | |
5 | */ | |
6 | ||
7 | /* This file is ALSO: | |
8 | * Copyright 2001-2004 David Abrahams. | |
9 | * Distributed under the Boost Software License, Version 1.0. | |
10 | * (See accompanying file LICENSE_1_0.txt or http://www.boost.org/LICENSE_1_0.txt) | |
11 | */ | |
12 | ||
13 | /* | |
14 | * make.c - bring a target up to date, once rules are in place. | |
15 | * | |
16 | * This modules controls the execution of rules to bring a target and its | |
17 | * dependencies up to date. It is invoked after the targets, rules, et. al. | |
18 | * described in rules.h are created by the interpreting jam files. | |
19 | * | |
20 | * This file contains the main make() entry point and the first pass make0(). | |
21 | * The second pass, make1(), which actually does the command execution, is in | |
22 | * make1.c. | |
23 | * | |
24 | * External routines: | |
25 | * make() - make a target, given its name | |
26 | * | |
27 | * Internal routines: | |
28 | * make0() - bind and scan everything to make a TARGET | |
29 | * make0sort() - reorder TARGETS chain by their time (newest to oldest) | |
30 | */ | |
31 | ||
32 | #include "jam.h" | |
33 | #include "make.h" | |
34 | ||
35 | #include "command.h" | |
36 | #ifdef OPT_HEADER_CACHE_EXT | |
37 | # include "hcache.h" | |
38 | #endif | |
39 | #include "headers.h" | |
40 | #include "lists.h" | |
41 | #include "object.h" | |
42 | #include "parse.h" | |
43 | #include "rules.h" | |
44 | #include "search.h" | |
45 | #include "timestamp.h" | |
46 | #include "variable.h" | |
47 | ||
48 | #include <assert.h> | |
49 | ||
50 | #ifndef max | |
51 | # define max(a,b) ((a)>(b)?(a):(b)) | |
52 | #endif | |
53 | ||
54 | static TARGETS * make0sort( TARGETS * c ); | |
55 | ||
56 | #ifdef OPT_GRAPH_DEBUG_EXT | |
57 | static void dependGraphOutput( TARGET * t, int depth ); | |
58 | #endif | |
59 | ||
60 | static char const * target_fate[] = | |
61 | { | |
62 | "init", /* T_FATE_INIT */ | |
63 | "making", /* T_FATE_MAKING */ | |
64 | "stable", /* T_FATE_STABLE */ | |
65 | "newer", /* T_FATE_NEWER */ | |
66 | "temp", /* T_FATE_ISTMP */ | |
67 | "touched", /* T_FATE_TOUCHED */ | |
68 | "rebuild", /* T_FATE_REBUILD */ | |
69 | "missing", /* T_FATE_MISSING */ | |
70 | "needtmp", /* T_FATE_NEEDTMP */ | |
71 | "old", /* T_FATE_OUTDATED */ | |
72 | "update", /* T_FATE_UPDATE */ | |
73 | "nofind", /* T_FATE_CANTFIND */ | |
74 | "nomake" /* T_FATE_CANTMAKE */ | |
75 | }; | |
76 | ||
77 | static char const * target_bind[] = | |
78 | { | |
79 | "unbound", | |
80 | "missing", | |
81 | "parents", | |
82 | "exists", | |
83 | }; | |
84 | ||
85 | #define spaces(x) ( " " + ( x > 20 ? 0 : 20-x ) ) | |
86 | ||
87 | ||
88 | /* | |
89 | * make() - make a target, given its name. | |
90 | */ | |
91 | ||
92 | int make( LIST * targets, int anyhow ) | |
93 | { | |
94 | COUNTS counts[ 1 ]; | |
95 | int status = 0; /* 1 if anything fails */ | |
96 | ||
97 | #ifdef OPT_HEADER_CACHE_EXT | |
98 | hcache_init(); | |
99 | #endif | |
100 | ||
101 | memset( (char *)counts, 0, sizeof( *counts ) ); | |
102 | ||
103 | /* First bind all targets with LOCATE_TARGET setting. This is needed to | |
104 | * correctly handle dependencies to generated headers. | |
105 | */ | |
106 | bind_explicitly_located_targets(); | |
107 | ||
108 | { | |
109 | LISTITER iter, end; | |
110 | PROFILE_ENTER( MAKE_MAKE0 ); | |
111 | for ( iter = list_begin( targets ), end = list_end( targets ); iter != end; iter = list_next( iter ) ) | |
112 | { | |
113 | TARGET * t = bindtarget( list_item( iter ) ); | |
114 | if ( t->fate == T_FATE_INIT ) | |
115 | make0( t, 0, 0, counts, anyhow, 0 ); | |
116 | } | |
117 | PROFILE_EXIT( MAKE_MAKE0 ); | |
118 | } | |
119 | ||
120 | #ifdef OPT_GRAPH_DEBUG_EXT | |
121 | if ( DEBUG_GRAPH ) | |
122 | { | |
123 | LISTITER iter, end; | |
124 | for ( iter = list_begin( targets ), end = list_end( targets ); iter != end; iter = list_next( iter ) ) | |
125 | dependGraphOutput( bindtarget( list_item( iter ) ), 0 ); | |
126 | } | |
127 | #endif | |
128 | ||
129 | if ( DEBUG_MAKE ) | |
130 | { | |
131 | if ( counts->targets ) | |
132 | out_printf( "...found %d target%s...\n", counts->targets, | |
133 | counts->targets > 1 ? "s" : "" ); | |
134 | if ( counts->temp ) | |
135 | out_printf( "...using %d temp target%s...\n", counts->temp, | |
136 | counts->temp > 1 ? "s" : "" ); | |
137 | if ( counts->updating ) | |
138 | out_printf( "...updating %d target%s...\n", counts->updating, | |
139 | counts->updating > 1 ? "s" : "" ); | |
140 | if ( counts->cantfind ) | |
141 | out_printf( "...can't find %d target%s...\n", counts->cantfind, | |
142 | counts->cantfind > 1 ? "s" : "" ); | |
143 | if ( counts->cantmake ) | |
144 | out_printf( "...can't make %d target%s...\n", counts->cantmake, | |
145 | counts->cantmake > 1 ? "s" : "" ); | |
146 | } | |
147 | ||
148 | status = counts->cantfind || counts->cantmake; | |
149 | ||
150 | { | |
151 | PROFILE_ENTER( MAKE_MAKE1 ); | |
152 | status |= make1( targets ); | |
153 | PROFILE_EXIT( MAKE_MAKE1 ); | |
154 | } | |
155 | ||
156 | return status; | |
157 | } | |
158 | ||
159 | ||
160 | /* Force any dependants of t that have already at least begun being visited by | |
161 | * make0() to be updated. | |
162 | */ | |
163 | ||
164 | static void force_rebuilds( TARGET * t ); | |
165 | ||
166 | static void update_dependants( TARGET * t ) | |
167 | { | |
168 | TARGETS * q; | |
169 | ||
170 | for ( q = t->dependants; q; q = q->next ) | |
171 | { | |
172 | TARGET * p = q->target; | |
173 | char fate0 = p->fate; | |
174 | ||
175 | /* If we have already at least begun visiting it and we are not already | |
176 | * rebuilding it for other reasons. | |
177 | */ | |
178 | if ( ( fate0 != T_FATE_INIT ) && ( fate0 < T_FATE_BUILD ) ) | |
179 | { | |
180 | p->fate = T_FATE_UPDATE; | |
181 | ||
182 | if ( DEBUG_FATE ) | |
183 | { | |
184 | out_printf( "fate change %s from %s to %s (as dependant of %s)\n", | |
185 | object_str( p->name ), target_fate[ (int) fate0 ], target_fate[ (int) p->fate ], object_str( t->name ) ); | |
186 | } | |
187 | ||
188 | /* If we are done visiting it, go back and make sure its dependants | |
189 | * get rebuilt. | |
190 | */ | |
191 | if ( fate0 > T_FATE_MAKING ) | |
192 | update_dependants( p ); | |
193 | } | |
194 | } | |
195 | /* Make sure that rebuilds can be chained. */ | |
196 | force_rebuilds( t ); | |
197 | } | |
198 | ||
199 | ||
200 | /* | |
201 | * Make sure that all of t's rebuilds get rebuilt. | |
202 | */ | |
203 | ||
204 | static void force_rebuilds( TARGET * t ) | |
205 | { | |
206 | TARGETS * d; | |
207 | for ( d = t->rebuilds; d; d = d->next ) | |
208 | { | |
209 | TARGET * r = d->target; | |
210 | ||
211 | /* If it is not already being rebuilt for other reasons. */ | |
212 | if ( r->fate < T_FATE_BUILD ) | |
213 | { | |
214 | if ( DEBUG_FATE ) | |
215 | out_printf( "fate change %s from %s to %s (by rebuild)\n", | |
216 | object_str( r->name ), target_fate[ (int) r->fate ], target_fate[ T_FATE_REBUILD ] ); | |
217 | ||
218 | /* Force rebuild it. */ | |
219 | r->fate = T_FATE_REBUILD; | |
220 | ||
221 | /* And make sure its dependants are updated too. */ | |
222 | update_dependants( r ); | |
223 | } | |
224 | } | |
225 | } | |
226 | ||
227 | ||
228 | int make0rescan( TARGET * t, TARGET * rescanning ) | |
229 | { | |
230 | int result = 0; | |
231 | TARGETS * c; | |
232 | ||
233 | /* Check whether we have already found a cycle. */ | |
234 | if ( target_scc( t ) == rescanning ) | |
235 | return 1; | |
236 | ||
237 | /* If we have already visited this node, ignore it. */ | |
238 | if ( t->rescanning == rescanning ) | |
239 | return 0; | |
240 | ||
241 | /* If t is already updated, ignore it. */ | |
242 | if ( t->scc_root == NULL && t->progress > T_MAKE_ACTIVE ) | |
243 | return 0; | |
244 | ||
245 | t->rescanning = rescanning; | |
246 | for ( c = t->depends; c; c = c->next ) | |
247 | { | |
248 | TARGET * dependency = c->target; | |
249 | /* Always start at the root of each new strongly connected component. */ | |
250 | if ( target_scc( dependency ) != target_scc( t ) ) | |
251 | dependency = target_scc( dependency ); | |
252 | result |= make0rescan( dependency, rescanning ); | |
253 | ||
254 | /* Make sure that we pick up the new include node. */ | |
255 | if ( c->target->includes == rescanning ) | |
256 | result = 1; | |
257 | } | |
258 | if ( result && t->scc_root == NULL ) | |
259 | { | |
260 | t->scc_root = rescanning; | |
261 | rescanning->depends = targetentry( rescanning->depends, t ); | |
262 | } | |
263 | return result; | |
264 | } | |
265 | ||
266 | ||
267 | /* | |
268 | * make0() - bind and scan everything to make a TARGET. | |
269 | * | |
270 | * Recursively binds a target, searches for #included headers, calls itself on | |
271 | * those headers and any dependencies. | |
272 | */ | |
273 | ||
274 | void make0 | |
275 | ( | |
276 | TARGET * t, | |
277 | TARGET * p, /* parent */ | |
278 | int depth, /* for display purposes */ | |
279 | COUNTS * counts, /* for reporting */ | |
280 | int anyhow, | |
281 | TARGET * rescanning | |
282 | ) /* forcibly touch all (real) targets */ | |
283 | { | |
284 | TARGETS * c; | |
285 | TARGET * ptime = t; | |
286 | TARGET * located_target = 0; | |
287 | timestamp last; | |
288 | timestamp leaf; | |
289 | timestamp hlast; | |
290 | int fate; | |
291 | char const * flag = ""; | |
292 | SETTINGS * s; | |
293 | ||
294 | #ifdef OPT_GRAPH_DEBUG_EXT | |
295 | int savedFate; | |
296 | int oldTimeStamp; | |
297 | #endif | |
298 | ||
299 | if ( DEBUG_MAKEPROG ) | |
300 | out_printf( "make\t--\t%s%s\n", spaces( depth ), object_str( t->name ) ); | |
301 | ||
302 | /* | |
303 | * Step 1: Initialize. | |
304 | */ | |
305 | ||
306 | if ( DEBUG_MAKEPROG ) | |
307 | out_printf( "make\t--\t%s%s\n", spaces( depth ), object_str( t->name ) ); | |
308 | ||
309 | t->fate = T_FATE_MAKING; | |
310 | t->depth = depth; | |
311 | ||
312 | /* | |
313 | * Step 2: Under the influence of "on target" variables, bind the target and | |
314 | * search for headers. | |
315 | */ | |
316 | ||
317 | /* Step 2a: Set "on target" variables. */ | |
318 | s = copysettings( t->settings ); | |
319 | pushsettings( root_module(), s ); | |
320 | ||
321 | /* Step 2b: Find and timestamp the target file (if it is a file). */ | |
322 | if ( ( t->binding == T_BIND_UNBOUND ) && !( t->flags & T_FLAG_NOTFILE ) ) | |
323 | { | |
324 | OBJECT * another_target; | |
325 | object_free( t->boundname ); | |
326 | t->boundname = search( t->name, &t->time, &another_target, | |
327 | t->flags & T_FLAG_ISFILE ); | |
328 | /* If it was detected that this target refers to an already existing and | |
329 | * bound target, we add a dependency so that every target depending on | |
330 | * us will depend on that other target as well. | |
331 | */ | |
332 | if ( another_target ) | |
333 | located_target = bindtarget( another_target ); | |
334 | ||
335 | t->binding = timestamp_empty( &t->time ) | |
336 | ? T_BIND_MISSING | |
337 | : T_BIND_EXISTS; | |
338 | } | |
339 | ||
340 | /* INTERNAL, NOTFILE header nodes have the time of their parents. */ | |
341 | if ( p && ( t->flags & T_FLAG_INTERNAL ) ) | |
342 | ptime = p; | |
343 | ||
344 | /* If temp file does not exist but parent does, use parent. */ | |
345 | if ( p && ( t->flags & T_FLAG_TEMP ) && | |
346 | ( t->binding == T_BIND_MISSING ) && | |
347 | ( p->binding != T_BIND_MISSING ) ) | |
348 | { | |
349 | t->binding = T_BIND_PARENTS; | |
350 | ptime = p; | |
351 | } | |
352 | ||
353 | #ifdef OPT_SEMAPHORE | |
354 | { | |
355 | LIST * var = var_get( root_module(), constant_JAM_SEMAPHORE ); | |
356 | if ( !list_empty( var ) ) | |
357 | { | |
358 | TARGET * const semaphore = bindtarget( list_front( var ) ); | |
359 | semaphore->progress = T_MAKE_SEMAPHORE; | |
360 | t->semaphore = semaphore; | |
361 | } | |
362 | } | |
363 | #endif | |
364 | ||
365 | /* Step 2c: If its a file, search for headers. */ | |
366 | if ( t->binding == T_BIND_EXISTS ) | |
367 | headers( t ); | |
368 | ||
369 | /* Step 2d: reset "on target" variables. */ | |
370 | popsettings( root_module(), s ); | |
371 | freesettings( s ); | |
372 | ||
373 | /* | |
374 | * Pause for a little progress reporting. | |
375 | */ | |
376 | ||
377 | if ( DEBUG_BIND ) | |
378 | { | |
379 | if ( !object_equal( t->name, t->boundname ) ) | |
380 | out_printf( "bind\t--\t%s%s: %s\n", spaces( depth ), | |
381 | object_str( t->name ), object_str( t->boundname ) ); | |
382 | ||
383 | switch ( t->binding ) | |
384 | { | |
385 | case T_BIND_UNBOUND: | |
386 | case T_BIND_MISSING: | |
387 | case T_BIND_PARENTS: | |
388 | out_printf( "time\t--\t%s%s: %s\n", spaces( depth ), | |
389 | object_str( t->name ), target_bind[ (int)t->binding ] ); | |
390 | break; | |
391 | ||
392 | case T_BIND_EXISTS: | |
393 | out_printf( "time\t--\t%s%s: %s\n", spaces( depth ), | |
394 | object_str( t->name ), timestamp_str( &t->time ) ); | |
395 | break; | |
396 | } | |
397 | } | |
398 | ||
399 | /* | |
400 | * Step 3: Recursively make0() dependencies & headers. | |
401 | */ | |
402 | ||
403 | /* Step 3a: Recursively make0() dependencies. */ | |
404 | for ( c = t->depends; c; c = c->next ) | |
405 | { | |
406 | int const internal = t->flags & T_FLAG_INTERNAL; | |
407 | ||
408 | /* Warn about circular deps, except for includes, which include each | |
409 | * other alot. | |
410 | */ | |
411 | if ( c->target->fate == T_FATE_INIT ) | |
412 | make0( c->target, ptime, depth + 1, counts, anyhow, rescanning ); | |
413 | else if ( c->target->fate == T_FATE_MAKING && !internal ) | |
414 | out_printf( "warning: %s depends on itself\n", object_str( | |
415 | c->target->name ) ); | |
416 | else if ( c->target->fate != T_FATE_MAKING && rescanning ) | |
417 | make0rescan( c->target, rescanning ); | |
418 | if ( rescanning && c->target->includes && c->target->includes->fate != | |
419 | T_FATE_MAKING ) | |
420 | make0rescan( target_scc( c->target->includes ), rescanning ); | |
421 | } | |
422 | ||
423 | if ( located_target ) | |
424 | { | |
425 | if ( located_target->fate == T_FATE_INIT ) | |
426 | make0( located_target, ptime, depth + 1, counts, anyhow, rescanning | |
427 | ); | |
428 | else if ( located_target->fate != T_FATE_MAKING && rescanning ) | |
429 | make0rescan( located_target, rescanning ); | |
430 | } | |
431 | ||
432 | /* Step 3b: Recursively make0() internal includes node. */ | |
433 | if ( t->includes ) | |
434 | make0( t->includes, p, depth + 1, counts, anyhow, rescanning ); | |
435 | ||
436 | /* Step 3c: Add dependencies' includes to our direct dependencies. */ | |
437 | { | |
438 | TARGETS * incs = 0; | |
439 | for ( c = t->depends; c; c = c->next ) | |
440 | if ( c->target->includes ) | |
441 | incs = targetentry( incs, c->target->includes ); | |
442 | t->depends = targetchain( t->depends, incs ); | |
443 | } | |
444 | ||
445 | if ( located_target ) | |
446 | t->depends = targetentry( t->depends, located_target ); | |
447 | ||
448 | /* Step 3d: Detect cycles. */ | |
449 | { | |
450 | int cycle_depth = depth; | |
451 | for ( c = t->depends; c; c = c->next ) | |
452 | { | |
453 | TARGET * scc_root = target_scc( c->target ); | |
454 | if ( scc_root->fate == T_FATE_MAKING && | |
455 | ( !scc_root->includes || | |
456 | scc_root->includes->fate != T_FATE_MAKING ) ) | |
457 | { | |
458 | if ( scc_root->depth < cycle_depth ) | |
459 | { | |
460 | cycle_depth = scc_root->depth; | |
461 | t->scc_root = scc_root; | |
462 | } | |
463 | } | |
464 | } | |
465 | } | |
466 | ||
467 | /* | |
468 | * Step 4: Compute time & fate. | |
469 | */ | |
470 | ||
471 | /* Step 4a: Pick up dependencies' time and fate. */ | |
472 | timestamp_clear( &last ); | |
473 | timestamp_clear( &leaf ); | |
474 | fate = T_FATE_STABLE; | |
475 | for ( c = t->depends; c; c = c->next ) | |
476 | { | |
477 | /* If we are in a different strongly connected component, pull | |
478 | * timestamps from the root. | |
479 | */ | |
480 | if ( c->target->scc_root ) | |
481 | { | |
482 | TARGET * const scc_root = target_scc( c->target ); | |
483 | if ( scc_root != t->scc_root ) | |
484 | { | |
485 | timestamp_max( &c->target->leaf, &c->target->leaf, | |
486 | &scc_root->leaf ); | |
487 | timestamp_max( &c->target->time, &c->target->time, | |
488 | &scc_root->time ); | |
489 | c->target->fate = max( c->target->fate, scc_root->fate ); | |
490 | } | |
491 | } | |
492 | ||
493 | /* If LEAVES has been applied, we only heed the timestamps of the leaf | |
494 | * source nodes. | |
495 | */ | |
496 | timestamp_max( &leaf, &leaf, &c->target->leaf ); | |
497 | if ( t->flags & T_FLAG_LEAVES ) | |
498 | { | |
499 | timestamp_copy( &last, &leaf ); | |
500 | continue; | |
501 | } | |
502 | timestamp_max( &last, &last, &c->target->time ); | |
503 | fate = max( fate, c->target->fate ); | |
504 | ||
505 | #ifdef OPT_GRAPH_DEBUG_EXT | |
506 | if ( DEBUG_FATE ) | |
507 | if ( fate < c->target->fate ) | |
508 | out_printf( "fate change %s from %s to %s by dependency %s\n", | |
509 | object_str( t->name ), target_fate[ (int)fate ], | |
510 | target_fate[ (int)c->target->fate ], object_str( | |
511 | c->target->name ) ); | |
512 | #endif | |
513 | } | |
514 | ||
515 | /* Step 4b: Pick up included headers time. */ | |
516 | ||
517 | /* | |
518 | * If a header is newer than a temp source that includes it, the temp source | |
519 | * will need building. | |
520 | */ | |
521 | if ( t->includes ) | |
522 | timestamp_copy( &hlast, &t->includes->time ); | |
523 | else | |
524 | timestamp_clear( &hlast ); | |
525 | ||
526 | /* Step 4c: handle NOUPDATE oddity. | |
527 | * | |
528 | * If a NOUPDATE file exists, mark it as having eternally old dependencies. | |
529 | * Do not inherit our fate from our dependencies. Decide fate based only on | |
530 | * other flags and our binding (done later). | |
531 | */ | |
532 | if ( t->flags & T_FLAG_NOUPDATE ) | |
533 | { | |
534 | #ifdef OPT_GRAPH_DEBUG_EXT | |
535 | if ( DEBUG_FATE ) | |
536 | if ( fate != T_FATE_STABLE ) | |
537 | out_printf( "fate change %s back to stable, NOUPDATE.\n", | |
538 | object_str( t->name ) ); | |
539 | #endif | |
540 | ||
541 | timestamp_clear( &last ); | |
542 | timestamp_clear( &t->time ); | |
543 | ||
544 | /* Do not inherit our fate from our dependencies. Decide fate based only | |
545 | * upon other flags and our binding (done later). | |
546 | */ | |
547 | fate = T_FATE_STABLE; | |
548 | } | |
549 | ||
550 | /* Step 4d: Determine fate: rebuild target or what? */ | |
551 | ||
552 | /* | |
553 | In English: | |
554 | If can not find or make child, can not make target. | |
555 | If children changed, make target. | |
556 | If target missing, make it. | |
557 | If children newer, make target. | |
558 | If temp's children newer than parent, make temp. | |
559 | If temp's headers newer than parent, make temp. | |
560 | If deliberately touched, make it. | |
561 | If up-to-date temp file present, use it. | |
562 | If target newer than non-notfile parent, mark target newer. | |
563 | Otherwise, stable! | |
564 | ||
565 | Note this block runs from least to most stable: as we make it further | |
566 | down the list, the target's fate gets more stable. | |
567 | */ | |
568 | ||
569 | #ifdef OPT_GRAPH_DEBUG_EXT | |
570 | savedFate = fate; | |
571 | oldTimeStamp = 0; | |
572 | #endif | |
573 | ||
574 | if ( fate >= T_FATE_BROKEN ) | |
575 | { | |
576 | fate = T_FATE_CANTMAKE; | |
577 | } | |
578 | else if ( fate >= T_FATE_SPOIL ) | |
579 | { | |
580 | fate = T_FATE_UPDATE; | |
581 | } | |
582 | else if ( t->binding == T_BIND_MISSING ) | |
583 | { | |
584 | fate = T_FATE_MISSING; | |
585 | } | |
586 | else if ( t->binding == T_BIND_EXISTS && timestamp_cmp( &last, &t->time ) > | |
587 | 0 ) | |
588 | { | |
589 | #ifdef OPT_GRAPH_DEBUG_EXT | |
590 | oldTimeStamp = 1; | |
591 | #endif | |
592 | fate = T_FATE_OUTDATED; | |
593 | } | |
594 | else if ( t->binding == T_BIND_PARENTS && timestamp_cmp( &last, &p->time ) > | |
595 | 0 ) | |
596 | { | |
597 | #ifdef OPT_GRAPH_DEBUG_EXT | |
598 | oldTimeStamp = 1; | |
599 | #endif | |
600 | fate = T_FATE_NEEDTMP; | |
601 | } | |
602 | else if ( t->binding == T_BIND_PARENTS && timestamp_cmp( &hlast, &p->time ) | |
603 | > 0 ) | |
604 | { | |
605 | fate = T_FATE_NEEDTMP; | |
606 | } | |
607 | else if ( t->flags & T_FLAG_TOUCHED ) | |
608 | { | |
609 | fate = T_FATE_TOUCHED; | |
610 | } | |
611 | else if ( anyhow && !( t->flags & T_FLAG_NOUPDATE ) ) | |
612 | { | |
613 | fate = T_FATE_TOUCHED; | |
614 | } | |
615 | else if ( t->binding == T_BIND_EXISTS && ( t->flags & T_FLAG_TEMP ) ) | |
616 | { | |
617 | fate = T_FATE_ISTMP; | |
618 | } | |
619 | else if ( t->binding == T_BIND_EXISTS && p && p->binding != T_BIND_UNBOUND | |
620 | && timestamp_cmp( &t->time, &p->time ) > 0 ) | |
621 | { | |
622 | #ifdef OPT_GRAPH_DEBUG_EXT | |
623 | oldTimeStamp = 1; | |
624 | #endif | |
625 | fate = T_FATE_NEWER; | |
626 | } | |
627 | else | |
628 | { | |
629 | fate = T_FATE_STABLE; | |
630 | } | |
631 | #ifdef OPT_GRAPH_DEBUG_EXT | |
632 | if ( DEBUG_FATE && ( fate != savedFate ) ) | |
633 | { | |
634 | if ( savedFate == T_FATE_STABLE ) | |
635 | out_printf( "fate change %s set to %s%s\n", object_str( t->name ), | |
636 | target_fate[ fate ], oldTimeStamp ? " (by timestamp)" : "" ); | |
637 | else | |
638 | out_printf( "fate change %s from %s to %s%s\n", object_str( t->name ), | |
639 | target_fate[ savedFate ], target_fate[ fate ], oldTimeStamp ? | |
640 | " (by timestamp)" : "" ); | |
641 | } | |
642 | #endif | |
643 | ||
644 | /* Step 4e: Handle missing files. */ | |
645 | /* If it is missing and there are no actions to create it, boom. */ | |
646 | /* If we can not make a target we do not care about it, okay. */ | |
647 | /* We could insist that there are updating actions for all missing */ | |
648 | /* files, but if they have dependencies we just pretend it is a NOTFILE. */ | |
649 | ||
650 | if ( ( fate == T_FATE_MISSING ) && !t->actions && !t->depends ) | |
651 | { | |
652 | if ( t->flags & T_FLAG_NOCARE ) | |
653 | { | |
654 | #ifdef OPT_GRAPH_DEBUG_EXT | |
655 | if ( DEBUG_FATE ) | |
656 | out_printf( "fate change %s to STABLE from %s, " | |
657 | "no actions, no dependencies and do not care\n", | |
658 | object_str( t->name ), target_fate[ fate ] ); | |
659 | #endif | |
660 | fate = T_FATE_STABLE; | |
661 | } | |
662 | else | |
663 | { | |
664 | out_printf( "don't know how to make %s\n", object_str( t->name ) ); | |
665 | fate = T_FATE_CANTFIND; | |
666 | } | |
667 | } | |
668 | ||
669 | /* Step 4f: Propagate dependencies' time & fate. */ | |
670 | /* Set leaf time to be our time only if this is a leaf. */ | |
671 | ||
672 | timestamp_max( &t->time, &t->time, &last ); | |
673 | timestamp_copy( &t->leaf, timestamp_empty( &leaf ) ? &t->time : &leaf ); | |
674 | /* This target's fate may have been updated by virtue of following some | |
675 | * target's rebuilds list, so only allow it to be increased to the fate we | |
676 | * have calculated. Otherwise, grab its new fate. | |
677 | */ | |
678 | if ( fate > t->fate ) | |
679 | t->fate = fate; | |
680 | else | |
681 | fate = t->fate; | |
682 | ||
683 | /* | |
684 | * Step 4g: If this target needs to be built, make0 all targets | |
685 | * that are updated by the same actions used to update this target. | |
686 | * These have already been marked as REBUILDS, and make1 has | |
687 | * special handling for them. We just need to make sure that | |
688 | * they get make0ed. | |
689 | */ | |
690 | if ( ( fate >= T_FATE_BUILD ) && ( fate < T_FATE_BROKEN ) ) | |
691 | { | |
692 | ACTIONS * a; | |
693 | TARGETS * c; | |
694 | for ( a = t->actions; a; a = a->next ) | |
695 | { | |
696 | for ( c = a->action->targets; c; c = c->next ) | |
697 | { | |
698 | if ( c->target->fate == T_FATE_INIT ) | |
699 | { | |
700 | make0( c->target, ptime, depth + 1, counts, anyhow, rescanning ); | |
701 | } | |
702 | } | |
703 | } | |
704 | } | |
705 | ||
706 | /* Step 4h: If this target needs to be built, force rebuild everything in | |
707 | * its rebuilds list. | |
708 | */ | |
709 | if ( ( fate >= T_FATE_BUILD ) && ( fate < T_FATE_BROKEN ) ) | |
710 | force_rebuilds( t ); | |
711 | ||
712 | /* | |
713 | * Step 5: Sort dependencies by their update time. | |
714 | */ | |
715 | ||
716 | if ( globs.newestfirst ) | |
717 | t->depends = make0sort( t->depends ); | |
718 | ||
719 | /* | |
720 | * Step 6: A little harmless tabulating for tracing purposes. | |
721 | */ | |
722 | ||
723 | /* Do not count or report interal includes nodes. */ | |
724 | if ( t->flags & T_FLAG_INTERNAL ) | |
725 | return; | |
726 | ||
727 | if ( counts ) | |
728 | { | |
729 | #ifdef OPT_IMPROVED_PATIENCE_EXT | |
730 | ++counts->targets; | |
731 | #else | |
732 | if ( !( ++counts->targets % 1000 ) && DEBUG_MAKE ) | |
733 | { | |
734 | out_printf( "...patience...\n" ); | |
735 | out_flush(); | |
736 | } | |
737 | #endif | |
738 | ||
739 | if ( fate == T_FATE_ISTMP ) | |
740 | ++counts->temp; | |
741 | else if ( fate == T_FATE_CANTFIND ) | |
742 | ++counts->cantfind; | |
743 | else if ( ( fate == T_FATE_CANTMAKE ) && t->actions ) | |
744 | ++counts->cantmake; | |
745 | else if ( ( fate >= T_FATE_BUILD ) && ( fate < T_FATE_BROKEN ) && | |
746 | t->actions ) | |
747 | ++counts->updating; | |
748 | } | |
749 | ||
750 | if ( !( t->flags & T_FLAG_NOTFILE ) && ( fate >= T_FATE_SPOIL ) ) | |
751 | flag = "+"; | |
752 | else if ( t->binding == T_BIND_EXISTS && p && timestamp_cmp( &t->time, | |
753 | &p->time ) > 0 ) | |
754 | flag = "*"; | |
755 | ||
756 | if ( DEBUG_MAKEPROG ) | |
757 | out_printf( "made%s\t%s\t%s%s\n", flag, target_fate[ (int)t->fate ], | |
758 | spaces( depth ), object_str( t->name ) ); | |
759 | } | |
760 | ||
761 | ||
762 | #ifdef OPT_GRAPH_DEBUG_EXT | |
763 | ||
764 | static char const * target_name( TARGET * t ) | |
765 | { | |
766 | static char buf[ 1000 ]; | |
767 | if ( t->flags & T_FLAG_INTERNAL ) | |
768 | { | |
769 | sprintf( buf, "%s (internal node)", object_str( t->name ) ); | |
770 | return buf; | |
771 | } | |
772 | return object_str( t->name ); | |
773 | } | |
774 | ||
775 | ||
776 | /* | |
777 | * dependGraphOutput() - output the DG after make0 has run. | |
778 | */ | |
779 | ||
780 | static void dependGraphOutput( TARGET * t, int depth ) | |
781 | { | |
782 | TARGETS * c; | |
783 | ||
784 | if ( ( t->flags & T_FLAG_VISITED ) || !t->name || !t->boundname ) | |
785 | return; | |
786 | ||
787 | t->flags |= T_FLAG_VISITED; | |
788 | ||
789 | switch ( t->fate ) | |
790 | { | |
791 | case T_FATE_TOUCHED: | |
792 | case T_FATE_MISSING: | |
793 | case T_FATE_OUTDATED: | |
794 | case T_FATE_UPDATE: | |
795 | out_printf( "->%s%2d Name: %s\n", spaces( depth ), depth, target_name( t | |
796 | ) ); | |
797 | break; | |
798 | default: | |
799 | out_printf( " %s%2d Name: %s\n", spaces( depth ), depth, target_name( t | |
800 | ) ); | |
801 | break; | |
802 | } | |
803 | ||
804 | if ( !object_equal( t->name, t->boundname ) ) | |
805 | out_printf( " %s Loc: %s\n", spaces( depth ), object_str( t->boundname ) | |
806 | ); | |
807 | ||
808 | switch ( t->fate ) | |
809 | { | |
810 | case T_FATE_STABLE: | |
811 | out_printf( " %s : Stable\n", spaces( depth ) ); | |
812 | break; | |
813 | case T_FATE_NEWER: | |
814 | out_printf( " %s : Newer\n", spaces( depth ) ); | |
815 | break; | |
816 | case T_FATE_ISTMP: | |
817 | out_printf( " %s : Up to date temp file\n", spaces( depth ) ); | |
818 | break; | |
819 | case T_FATE_NEEDTMP: | |
820 | out_printf( " %s : Temporary file, to be updated\n", spaces( depth ) | |
821 | ); | |
822 | break; | |
823 | case T_FATE_TOUCHED: | |
824 | out_printf( " %s : Been touched, updating it\n", spaces( depth ) ); | |
825 | break; | |
826 | case T_FATE_MISSING: | |
827 | out_printf( " %s : Missing, creating it\n", spaces( depth ) ); | |
828 | break; | |
829 | case T_FATE_OUTDATED: | |
830 | out_printf( " %s : Outdated, updating it\n", spaces( depth ) ); | |
831 | break; | |
832 | case T_FATE_REBUILD: | |
833 | out_printf( " %s : Rebuild, updating it\n", spaces( depth ) ); | |
834 | break; | |
835 | case T_FATE_UPDATE: | |
836 | out_printf( " %s : Updating it\n", spaces( depth ) ); | |
837 | break; | |
838 | case T_FATE_CANTFIND: | |
839 | out_printf( " %s : Can not find it\n", spaces( depth ) ); | |
840 | break; | |
841 | case T_FATE_CANTMAKE: | |
842 | out_printf( " %s : Can make it\n", spaces( depth ) ); | |
843 | break; | |
844 | } | |
845 | ||
846 | if ( t->flags & ~T_FLAG_VISITED ) | |
847 | { | |
848 | out_printf( " %s : ", spaces( depth ) ); | |
849 | if ( t->flags & T_FLAG_TEMP ) out_printf( "TEMPORARY " ); | |
850 | if ( t->flags & T_FLAG_NOCARE ) out_printf( "NOCARE " ); | |
851 | if ( t->flags & T_FLAG_NOTFILE ) out_printf( "NOTFILE " ); | |
852 | if ( t->flags & T_FLAG_TOUCHED ) out_printf( "TOUCHED " ); | |
853 | if ( t->flags & T_FLAG_LEAVES ) out_printf( "LEAVES " ); | |
854 | if ( t->flags & T_FLAG_NOUPDATE ) out_printf( "NOUPDATE " ); | |
855 | out_printf( "\n" ); | |
856 | } | |
857 | ||
858 | for ( c = t->depends; c; c = c->next ) | |
859 | { | |
860 | out_printf( " %s : Depends on %s (%s)", spaces( depth ), | |
861 | target_name( c->target ), target_fate[ (int)c->target->fate ] ); | |
862 | if ( !timestamp_cmp( &c->target->time, &t->time ) ) | |
863 | out_printf( " (max time)"); | |
864 | out_printf( "\n" ); | |
865 | } | |
866 | ||
867 | for ( c = t->depends; c; c = c->next ) | |
868 | dependGraphOutput( c->target, depth + 1 ); | |
869 | } | |
870 | #endif | |
871 | ||
872 | ||
873 | /* | |
874 | * make0sort() - reorder TARGETS chain by their time (newest to oldest). | |
875 | * | |
876 | * We walk chain, taking each item and inserting it on the sorted result, with | |
877 | * newest items at the front. This involves updating each of the TARGETS' | |
878 | * c->next and c->tail. Note that we make c->tail a valid prev pointer for every | |
879 | * entry. Normally, it is only valid at the head, where prev == tail. Note also | |
880 | * that while tail is a loop, next ends at the end of the chain. | |
881 | */ | |
882 | ||
883 | static TARGETS * make0sort( TARGETS * chain ) | |
884 | { | |
885 | PROFILE_ENTER( MAKE_MAKE0SORT ); | |
886 | ||
887 | TARGETS * result = 0; | |
888 | ||
889 | /* Walk the current target list. */ | |
890 | while ( chain ) | |
891 | { | |
892 | TARGETS * c = chain; | |
893 | TARGETS * s = result; | |
894 | ||
895 | chain = chain->next; | |
896 | ||
897 | /* Find point s in result for c. */ | |
898 | while ( s && timestamp_cmp( &s->target->time, &c->target->time ) > 0 ) | |
899 | s = s->next; | |
900 | ||
901 | /* Insert c in front of s (might be 0). */ | |
902 | c->next = s; /* good even if s = 0 */ | |
903 | if ( result == s ) result = c; /* new head of chain? */ | |
904 | if ( !s ) s = result; /* wrap to ensure a next */ | |
905 | if ( result != c ) s->tail->next = c; /* not head? be prev's next */ | |
906 | c->tail = s->tail; /* take on next's prev */ | |
907 | s->tail = c; /* make next's prev us */ | |
908 | } | |
909 | ||
910 | PROFILE_EXIT( MAKE_MAKE0SORT ); | |
911 | return result; | |
912 | } | |
913 | ||
914 | ||
915 | static LIST * targets_to_update_ = L0; | |
916 | ||
917 | ||
918 | void mark_target_for_updating( OBJECT * target ) | |
919 | { | |
920 | targets_to_update_ = list_push_back( targets_to_update_, object_copy( | |
921 | target ) ); | |
922 | } | |
923 | ||
924 | ||
925 | LIST * targets_to_update() | |
926 | { | |
927 | return targets_to_update_; | |
928 | } | |
929 | ||
930 | ||
931 | void clear_targets_to_update() | |
932 | { | |
933 | list_free( targets_to_update_ ); | |
934 | targets_to_update_ = L0; | |
935 | } |