xref: /netbsd-src/usr.bin/config/mkmakefile.c (revision b83ebeba7f767758d2778bb0f9d7a76534253621) 
1 /*	$NetBSD: mkmakefile.c,v 1.68 2015/09/04 10:16:35 uebayasi Exp $	*/
2 
3 /*
4  * Copyright (c) 1992, 1993
5  *	The Regents of the University of California.  All rights reserved.
6  *
7  * This software was developed by the Computer Systems Engineering group
8  * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
9  * contributed to Berkeley.
10  *
11  * All advertising materials mentioning features or use of this software
12  * must display the following acknowledgement:
13  *	This product includes software developed by the University of
14  *	California, Lawrence Berkeley Laboratories.
15  *
16  * Redistribution and use in source and binary forms, with or without
17  * modification, are permitted provided that the following conditions
18  * are met:
19  * 1. Redistributions of source code must retain the above copyright
20  *    notice, this list of conditions and the following disclaimer.
21  * 2. Redistributions in binary form must reproduce the above copyright
22  *    notice, this list of conditions and the following disclaimer in the
23  *    documentation and/or other materials provided with the distribution.
24  * 3. Neither the name of the University nor the names of its contributors
25  *    may be used to endorse or promote products derived from this software
26  *    without specific prior written permission.
27  *
28  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
29  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
30  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
31  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
32  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
33  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
34  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
35  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
36  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
37  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
38  * SUCH DAMAGE.
39  *
40  *	from: @(#)mkmakefile.c	8.1 (Berkeley) 6/6/93
41  */
42 
43 #if HAVE_NBTOOL_CONFIG_H
44 #include "nbtool_config.h"
45 #endif
46 
47 #include <sys/cdefs.h>
48 __RCSID("$NetBSD: mkmakefile.c,v 1.68 2015/09/04 10:16:35 uebayasi Exp $");
49 
50 #include <sys/param.h>
51 #include <ctype.h>
52 #include <errno.h>
53 #include <stdio.h>
54 #include <stdlib.h>
55 #include <string.h>
56 #include <err.h>
57 #include <util.h>
58 #include "defs.h"
59 #include "sem.h"
60 
61 /*
62  * Make the Makefile.
63  */
64 
65 static void emitdefs(FILE *);
66 static void emitallfiles(FILE *);
67 
68 static void emitofiles(FILE *);
69 static void emitallkobjs(FILE *);
70 static int emitallkobjscb(const char *, void *, void *);
71 static void emitattrkobjs(FILE *);
72 static int emitattrkobjscb(const char *, void *, void *);
73 static void emitkobjs(FILE *);
74 static void emitcfiles(FILE *);
75 static void emitsfiles(FILE *);
76 static void emitrules(FILE *);
77 static void emitload(FILE *);
78 static void emitincludes(FILE *);
79 static void emitappmkoptions(FILE *);
80 static void emitsubs(FILE *, const char *, const char *, int);
81 static int  selectopt(const char *, void *);
82 
83 int has_build_kernel;
84 
85 int
86 mkmakefile(void)
87 {
88 	FILE *ifp, *ofp;
89 	int lineno;
90 	void (*fn)(FILE *);
91 	char line[BUFSIZ], ifname[200];
92 
93 	/*
94 	 * Check if conf/Makefile.kern.inc defines "build_kernel".
95 	 *
96 	 * (This is usually done by checking "version" in sys/conf/files;
97 	 * unfortunately the "build_kernel" change done around 2014 Aug didn't
98 	 * bump that version.  Thus this hack.)
99 	 */
100 	(void)snprintf(ifname, sizeof(ifname), "%s/conf/Makefile.kern.inc",
101 	    srcdir);
102 	if ((ifp = fopen(ifname, "r")) == NULL) {
103 		warn("cannot read %s", ifname);
104 		goto bad2;
105 	}
106 	while (fgets(line, sizeof(line), ifp) != NULL) {
107 		if (strncmp(line, "build_kernel:", 13) == 0) {
108 			has_build_kernel = 1;
109 			break;
110 		}
111 	}
112 	(void)fclose(ifp);
113 
114 	/*
115 	 * Try a makefile for the port first.
116 	 */
117 	(void)snprintf(ifname, sizeof(ifname), "%s/arch/%s/conf/Makefile.%s",
118 	    srcdir, machine, machine);
119 	if ((ifp = fopen(ifname, "r")) == NULL) {
120 		/*
121 		 * Try a makefile for the architecture second.
122 		 */
123 		(void)snprintf(ifname, sizeof(ifname),
124 		    "%s/arch/%s/conf/Makefile.%s",
125 		    srcdir, machinearch, machinearch);
126 		ifp = fopen(ifname, "r");
127 	}
128 	if (ifp == NULL) {
129 		warn("cannot read %s", ifname);
130 		goto bad2;
131 	}
132 
133 	if ((ofp = fopen("Makefile.tmp", "w")) == NULL) {
134 		warn("cannot write Makefile");
135 		goto bad1;
136 	}
137 
138 	emitdefs(ofp);
139 
140 	lineno = 0;
141 	while (fgets(line, sizeof(line), ifp) != NULL) {
142 		lineno++;
143 		if ((version < 20090214 && line[0] != '%') || line[0] == '#') {
144 			fputs(line, ofp);
145 			continue;
146 		}
147 		if (strcmp(line, "%OBJS\n") == 0)
148 			fn = Mflag ? emitkobjs : emitofiles;
149 		else if (strcmp(line, "%CFILES\n") == 0)
150 			fn = emitcfiles;
151 		else if (strcmp(line, "%SFILES\n") == 0)
152 			fn = emitsfiles;
153 		else if (strcmp(line, "%RULES\n") == 0)
154 			fn = emitrules;
155 		else if (strcmp(line, "%LOAD\n") == 0)
156 			fn = emitload;
157 		else if (strcmp(line, "%INCLUDES\n") == 0)
158 			fn = emitincludes;
159 		else if (strcmp(line, "%MAKEOPTIONSAPPEND\n") == 0)
160 			fn = emitappmkoptions;
161 		else if (strncmp(line, "%VERSION ", sizeof("%VERSION ")-1) == 0) {
162 			int newvers;
163 			if (sscanf(line, "%%VERSION %d\n", &newvers) != 1) {
164 				cfgxerror(ifname, lineno, "syntax error for "
165 				    "%%VERSION");
166 			} else
167 				setversion(newvers);
168 			continue;
169 		} else {
170 			if (version < 20090214)
171 				cfgxerror(ifname, lineno,
172 				    "unknown %% construct ignored: %s", line);
173 			else
174 				emitsubs(ofp, line, ifname, lineno);
175 			continue;
176 		}
177 		(*fn)(ofp);
178 	}
179 
180 	fflush(ofp);
181 	if (ferror(ofp))
182 		goto wrerror;
183 
184 	if (ferror(ifp)) {
185 		warn("error reading %s (at line %d)", ifname, lineno);
186 		goto bad;
187 	}
188 
189 	if (fclose(ofp)) {
190 		ofp = NULL;
191 		goto wrerror;
192 	}
193 	(void)fclose(ifp);
194 
195 	if (moveifchanged("Makefile.tmp", "Makefile") != 0) {
196 		warn("error renaming Makefile");
197 		goto bad2;
198 	}
199 	return (0);
200 
201  wrerror:
202 	warn("error writing Makefile");
203  bad:
204 	if (ofp != NULL)
205 		(void)fclose(ofp);
206  bad1:
207 	(void)fclose(ifp);
208 	/* (void)unlink("Makefile.tmp"); */
209  bad2:
210 	return (1);
211 }
212 
213 static void
214 emitsubs(FILE *fp, const char *line, const char *file, int lineno)
215 {
216 	char *nextpct;
217 	const char *optname;
218 	struct nvlist *option;
219 
220 	while (*line != '\0') {
221 		if (*line != '%') {
222 			fputc(*line++, fp);
223 			continue;
224 		}
225 
226 		line++;
227 		nextpct = strchr(line, '%');
228 		if (nextpct == NULL) {
229 			cfgxerror(file, lineno, "unbalanced %% or "
230 			    "unknown construct");
231 			return;
232 		}
233 		*nextpct = '\0';
234 
235 		if (*line == '\0')
236 			fputc('%', fp);
237 		else {
238 			optname = intern(line);
239 			if (!DEFINED_OPTION(optname)) {
240 				cfgxerror(file, lineno, "unknown option %s",
241 				    optname);
242 				return;
243 			}
244 
245 			if ((option = ht_lookup(opttab, optname)) == NULL)
246 				option = ht_lookup(fsopttab, optname);
247 			if (option != NULL)
248 				fputs(option->nv_str ? option->nv_str : "1",
249 				    fp);
250 			/*
251 			 * Otherwise it's not a selected option and we don't
252 			 * output anything.
253 			 */
254 		}
255 
256 		line = nextpct + 1;
257 	}
258 }
259 
260 static void
261 emitdefs(FILE *fp)
262 {
263 	struct nvlist *nv;
264 
265 	fprintf(fp, "KERNEL_BUILD=%s\n", conffile);
266 	fputs("IDENT= \\\n", fp);
267 	for (nv = options; nv != NULL; nv = nv->nv_next) {
268 
269 		/* Skip any options output to a header file */
270 		if (DEFINED_OPTION(nv->nv_name))
271 			continue;
272 		const char *s = nv->nv_str;
273 		fprintf(fp, "\t-D%s%s%s%s \\\n", nv->nv_name,
274 		    s ? "=\"" : "",
275 		    s ? s : "",
276 		    s ? "\"" : "");
277 	}
278 	putc('\n', fp);
279 	fprintf(fp, "MACHINE=%s\n", machine);
280 
281 	const char *subdir = "";
282 	if (*srcdir != '/' && *srcdir != '.') {
283 		/*
284 		 * libkern and libcompat "Makefile.inc"s want relative S
285 		 * specification to begin with '.'.
286 		 */
287 		subdir = "./";
288 	}
289 	fprintf(fp, "S=\t%s%s\n", subdir, srcdir);
290 	if (Sflag) {
291 		fprintf(fp, ".PATH: $S\n");
292 		fprintf(fp, "___USE_SUFFIX_RULES___=1\n");
293 	}
294 	for (nv = mkoptions; nv != NULL; nv = nv->nv_next)
295 		fprintf(fp, "%s=%s\n", nv->nv_name, nv->nv_str);
296 }
297 
298 static void
299 emitfile(FILE *fp, struct files *fi)
300 {
301 	const char *defprologue = "$S/";
302 	const char *prologue, *prefix, *sep;
303 
304 	if (Sflag)
305 		defprologue = "";
306 	prologue = prefix = sep = "";
307 	if (*fi->fi_path != '/') {
308 		prologue = defprologue;
309 		if (fi->fi_prefix != NULL) {
310 			if (*fi->fi_prefix == '/')
311 				prologue = "";
312 			prefix = fi->fi_prefix;
313 			sep = "/";
314 		}
315 	}
316 	fprintf(fp, "%s%s%s%s", prologue, prefix, sep, fi->fi_path);
317 }
318 
319 static void
320 emitfilerel(FILE *fp, struct files *fi)
321 {
322 	const char *prefix, *sep;
323 
324 	prefix = sep = "";
325 	if (*fi->fi_path != '/') {
326 		if (fi->fi_prefix != NULL) {
327 			prefix = fi->fi_prefix;
328 			sep = "/";
329 		}
330 	}
331 	fprintf(fp, "%s%s%s", prefix, sep, fi->fi_path);
332 }
333 
334 static void
335 emitofiles(FILE *fp)
336 {
337 
338 	emitallfiles(fp);
339 	fprintf(fp, "#%%OFILES\n");
340 }
341 
342 static void
343 emitkobjs(FILE *fp)
344 {
345 	emitallkobjs(fp);
346 	emitattrkobjs(fp);
347 }
348 
349 static int emitallkobjsweighcb(const char *name, void *v, void *arg);
350 static void weighattr(struct attr *a);
351 static int attrcmp(const void *l, const void *r);
352 
353 struct attr **attrbuf;
354 size_t attridx;
355 
356 static void
357 emitallkobjs(FILE *fp)
358 {
359 	size_t i;
360 
361 	attrbuf = emalloc(nattrs * sizeof(*attrbuf));
362 
363 	ht_enumerate(attrtab, emitallkobjsweighcb, NULL);
364 	ht_enumerate(attrtab, emitallkobjscb, NULL);
365 	qsort(attrbuf, attridx, sizeof(struct attr *), attrcmp);
366 
367 	fputs("OBJS= \\\n", fp);
368 	for (i = 0; i < attridx; i++)
369 		fprintf(fp, "\t%s.ko \\\n", attrbuf[i]->a_name);
370 	putc('\n', fp);
371 
372 	free(attrbuf);
373 }
374 
375 static int
376 emitallkobjscb(const char *name, void *v, void *arg)
377 {
378 	struct attr *a = v;
379 
380 	if (ht_lookup(selecttab, name) == NULL)
381 		return 0;
382 	if (TAILQ_EMPTY(&a->a_files))
383 		return 0;
384 	attrbuf[attridx++] = a;
385 	/* XXX nattrs tracking is not exact yet */
386 	if (attridx == nattrs) {
387 		nattrs *= 2;
388 		attrbuf = erealloc(attrbuf, nattrs * sizeof(*attrbuf));
389 	}
390 	return 0;
391 }
392 
393 static int
394 emitallkobjsweighcb(const char *name, void *v, void *arg)
395 {
396 	struct attr *a = v;
397 
398 	weighattr(a);
399 	return 0;
400 }
401 
402 static void
403 weighattr(struct attr *a)
404 {
405 	struct attrlist *al;
406 
407 	for (al = a->a_deps; al != NULL; al = al->al_next) {
408 		weighattr(al->al_this);
409 	}
410 	a->a_weight++;
411 }
412 
413 static int
414 attrcmp(const void *l, const void *r)
415 {
416 	const struct attr * const *a = l, * const *b = r;
417 	const int wa = (*a)->a_weight, wb = (*b)->a_weight;
418 	return (wa > wb) ? -1 : (wa < wb) ? 1 : 0;
419 }
420 
421 static void
422 emitattrkobjs(FILE *fp)
423 {
424 	extern struct	hashtab *attrtab;
425 
426 	ht_enumerate(attrtab, emitattrkobjscb, fp);
427 }
428 
429 static int
430 emitattrkobjscb(const char *name, void *v, void *arg)
431 {
432 	struct attr *a = v;
433 	struct files *fi;
434 	FILE *fp = arg;
435 
436 	if (ht_lookup(selecttab, name) == NULL)
437 		return 0;
438 	if (TAILQ_EMPTY(&a->a_files))
439 		return 0;
440 	fputc('\n', fp);
441 	fprintf(fp, "# %s (%d)\n", name, a->a_weight);
442 	fprintf(fp, "OBJS.%s= \\\n", name);
443 	TAILQ_FOREACH(fi, &a->a_files, fi_anext) {
444 		fprintf(fp, "\t%s.o \\\n", fi->fi_base);
445 	}
446 	fputc('\n', fp);
447 	fprintf(fp, "%s.ko: ${OBJS.%s}\n", name, name);
448 	fprintf(fp, "\t${LINK_O}\n");
449 	return 0;
450 }
451 
452 static void
453 emitcfiles(FILE *fp)
454 {
455 
456 	emitallfiles(fp);
457 	fprintf(fp, "#%%CFILES\n");
458 }
459 
460 static void
461 emitsfiles(FILE *fp)
462 {
463 
464 	emitallfiles(fp);
465 	fprintf(fp, "#%%SFILES\n");
466 }
467 
468 static void
469 emitallfiles(FILE *fp)
470 {
471 	struct files *fi;
472 	static int called;
473 	int i;
474 	int found = 0;
475 
476 	if (called++ != 0)
477 		return;
478 	for (i = 0; i < (int)nselfiles; i++) {
479 		fi = selfiles[i];
480 		if (found++ == 0)
481 			fprintf(fp, "ALLFILES= \\\n");
482 		putc('\t', fp);
483 		emitfilerel(fp, fi);
484 		fputs(" \\\n", fp);
485 	}
486 	fputc('\n', fp);
487 }
488 
489 /*
490  * Emit the make-rules.
491  */
492 static void
493 emitrules(FILE *fp)
494 {
495 	struct files *fi;
496 	int i;
497 	int found = 0;
498 
499 	for (i = 0; i < (int)nselfiles; i++) {
500 		fi = selfiles[i];
501 		if (fi->fi_mkrule == NULL)
502 			continue;
503 		fprintf(fp, "%s.o: ", fi->fi_base);
504 		emitfile(fp, fi);
505 		putc('\n', fp);
506 		fprintf(fp, "\t%s\n\n", fi->fi_mkrule);
507 		found++;
508 	}
509 	if (found == 0)
510 		fprintf(fp, "#%%RULES\n");
511 }
512 
513 /*
514  * Emit the load commands.
515  *
516  * This function is not to be called `spurt'.
517  */
518 static void
519 emitload(FILE *fp)
520 {
521 	struct config *cf;
522 	int found = 0;
523 
524 	/*
525 	 * Generate the backward-compatible "build_kernel" rule if
526 	 * sys/conf/Makefile.kern.inc doesn't define any (pre-2014 Aug).
527 	 */
528 	if (has_build_kernel == 0) {
529 		fprintf(fp, "build_kernel: .USE\n"
530 		    "\t${SYSTEM_LD_HEAD}\n"
531 		    "\t${SYSTEM_LD}%s\n"
532 		    "\t${SYSTEM_LD_TAIL}\n"
533 		    "\n",
534 		    Sflag ? "" : " swap${.TARGET}.o");
535 	}
536 	/*
537 	 * Generate per-kernel rules.
538 	 */
539 	TAILQ_FOREACH(cf, &allcf, cf_next) {
540 		char swapobj[100];
541 
542 		if (Sflag) {
543 			swapobj[0] = '\0';
544 		} else {
545 			(void)snprintf(swapobj, sizeof(swapobj), " swap%s.o",
546 	 		    cf->cf_name);
547 		}
548 		fprintf(fp, "KERNELS+=%s\n", cf->cf_name);
549 		found = 1;
550 	}
551 	if (found == 0)
552 		fprintf(fp, "#%%LOAD\n");
553 }
554 
555 /*
556  * Emit include headers (for any prefixes encountered)
557  */
558 static void
559 emitincludes(FILE *fp)
560 {
561 	struct prefix *pf;
562 
563 	SLIST_FOREACH(pf, &allprefixes, pf_next) {
564 		const char *prologue = (*pf->pf_prefix == '/') ? "" : "$S/";
565 
566 		fprintf(fp, "EXTRA_INCLUDES+=\t-I%s%s\n",
567 		    prologue, pf->pf_prefix);
568 	}
569 }
570 
571 /*
572  * Emit appending makeoptions.
573  */
574 static void
575 emitappmkoptions(FILE *fp)
576 {
577 	struct nvlist *nv;
578 	struct condexpr *cond;
579 
580 	for (nv = appmkoptions; nv != NULL; nv = nv->nv_next)
581 		fprintf(fp, "%s+=%s\n", nv->nv_name, nv->nv_str);
582 
583 	for (nv = condmkoptions; nv != NULL; nv = nv->nv_next) {
584 		cond = nv->nv_ptr;
585 		if (expr_eval(cond, selectopt, NULL))
586 			fprintf(fp, "%s+=%s\n", nv->nv_name, nv->nv_str);
587 		condexpr_destroy(cond);
588 		nv->nv_ptr = NULL;
589 	}
590 }
591 
592 static int
593 /*ARGSUSED*/
594 selectopt(const char *name, void *context)
595 {
596 
597 	return (ht_lookup(selecttab, strtolower(name)) != NULL);
598 }
599