xref: /illumos-gate/usr/src/tools/cw/cw.c (revision 73a801ac)
1 
2 /*
3  * CDDL HEADER START
4  *
5  * The contents of this file are subject to the terms of the
6  * Common Development and Distribution License (the "License").
7  * You may not use this file except in compliance with the License.
8  *
9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10  * or http://www.opensolaris.org/os/licensing.
11  * See the License for the specific language governing permissions
12  * and limitations under the License.
13  *
14  * When distributing Covered Code, include this CDDL HEADER in each
15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16  * If applicable, add the following below this CDDL HEADER, with the
17  * fields enclosed by brackets "[]" replaced with your own identifying
18  * information: Portions Copyright [yyyy] [name of copyright owner]
19  *
20  * CDDL HEADER END
21  */
22 
23 /*
24  * Copyright 2018, Richard Lowe.
25  */
26 /*
27  * Copyright 2010 Sun Microsystems, Inc.  All rights reserved.
28  * Use is subject to license terms.
29  *
30  * Copyright 2019 Joyent, Inc.
31  */
32 
33 /*
34  * Wrapper for the GNU C compiler to make it accept the Sun C compiler
35  * arguments where possible.
36  *
37  * Since the translation is inexact, this is something of a work-in-progress.
38  *
39  */
40 
41 /* If you modify this file, you must increment CW_VERSION */
42 #define	CW_VERSION	"6.1"
43 
44 /*
45  * -#		Verbose mode
46  * -###		Show compiler commands built by driver, no compilation
47  * -A<name[(tokens)]>	Preprocessor predicate assertion
48  * -C		Prevent preprocessor from removing comments
49  * -c		Compile only - produce .o files, suppress linking
50  * -cg92	Alias for -xtarget=ss1000
51  * -D<name[=token]>	Associate name with token as if by #define
52  * -d[y|n]	dynamic [-dy] or static [-dn] option to linker
53  * -E		Compile source through preprocessor only, output to stdout
54  * -erroff=<t>	Suppress warnings specified by tags t(%none, %all, <tag list>)
55  * -errtags=<a>	Display messages with tags a(no, yes)
56  * -errwarn=<t>	Treats warnings specified by tags t(%none, %all, <tag list>)
57  *		as errors
58  * -fast	Optimize using a selection of options
59  * -fd		Report old-style function definitions and declarations
60  * -fnonstd	Initialize floating-point hardware to non-standard preferences
61  * -fns[=<yes|no>] Select non-standard floating point mode
62  * -fprecision=<p> Set FP rounding precision mode p(single, double, extended)
63  * -fround=<r>	Select the IEEE rounding mode in effect at startup
64  * -fsimple[=<n>] Select floating-point optimization preferences <n>
65  * -fsingle	Use single-precision arithmetic (-Xt and -Xs modes only)
66  * -ftrap=<t>	Select floating-point trapping mode in effect at startup
67  * -fstore	force floating pt. values to target precision on assignment
68  * -g		Compile for debugging
69  * -H		Print path name of each file included during compilation
70  * -h <name>	Assign <name> to generated dynamic shared library
71  * -I<dir>	Add <dir> to preprocessor #include file search path
72  * -i		Passed to linker to ignore any LD_LIBRARY_PATH setting
73  * -keeptmp	Keep temporary files created during compilation
74  * -L<dir>	Pass to linker to add <dir> to the library search path
75  * -l<name>	Link with library lib<name>.a or lib<name>.so
76  * -mc		Remove duplicate strings from .comment section of output files
77  * -mr		Remove all strings from .comment section of output files
78  * -mr,"string"	Remove all strings and append "string" to .comment section
79  * -mt		Specify options needed when compiling multi-threaded code
80  * -native	Find available processor, generate code accordingly
81  * -nofstore	Do not force floating pt. values to target precision
82  *		on assignment
83  * -norunpath	Do not build in a runtime path for shared libraries
84  * -O		Use default optimization level (-xO2 or -xO3. Check man page.)
85  * -o <outputfile> Set name of output file to <outputfile>
86  * -P		Compile source through preprocessor only, output to .i  file
87  * -p		Compile for profiling with prof
88  * -Q[y|n]	Emit/don't emit identification info to output file
89  * -R<dir[:dir]> Build runtime search path list into executable
90  * -S		Compile and only generate assembly code (.s)
91  * -s		Strip symbol table from the executable file
92  * -t		Turn off duplicate symbol warnings when linking
93  * -U<name>	Delete initial definition of preprocessor symbol <name>
94  * -V		Report version number of each compilation phase
95  * -v		Do stricter semantic checking
96  * -W<c>,<arg>	Pass <arg> to specified component <c> (a,l,m,p,0,2,h,i,u)
97  * -w		Suppress compiler warning messages
98  * -Xa		Compile assuming ANSI C conformance, allow K & R extensions
99  *		(default mode)
100  * -Xs		Compile assuming (pre-ANSI) K & R C style code
101  * -Xt		Compile assuming K & R conformance, allow ANSI C
102  * -xarch=<a>	Specify target architecture instruction set
103  * -xbuiltin[=<b>] When profitable inline, or substitute intrinisic functions
104  *		for system functions, b={%all,%none}
105  * -xCC		Accept C++ style comments
106  * -xchip=<c>	Specify the target processor for use by the optimizer
107  * -xcode=<c>	Generate different code for forming addresses
108  * -xcrossfile[=<n>] Enable optimization and inlining across source files,
109  *		n={0|1}
110  * -xe		Perform only syntax/semantic checking, no code generation
111  * -xF		Compile for later mapfile reordering or unused section
112  *		elimination
113  * -xhelp=<f>	Display on-line help information f(flags, readme, errors)
114  * -xildoff	Cancel -xildon
115  * -xildon	Enable use of the incremental linker, ild
116  * -xinline=[<a>,...,<a>]  Attempt inlining of specified user routines,
117  *		<a>={%auto,func,no%func}
118  * -xlibmieee	Force IEEE 754 return values for math routines in
119  *		exceptional cases
120  * -xlibmil	Inline selected libm math routines for optimization
121  * -xlic_lib=sunperf	Link in the Sun supplied performance libraries
122  * -xlicinfo	Show license server information
123  * -xmaxopt=[off,1,2,3,4,5] maximum optimization level allowed on #pragma opt
124  * -xO<n>	Generate optimized code (n={1|2|3|4|5})
125  * -xP		Print prototypes for function definitions
126  * -xprofile=<p> Collect data for a profile or use a profile to optimize
127  *		<p>={{collect,use}[:<path>],tcov}
128  * -xregs=<r>	Control register allocation
129  * -xs		Allow debugging without object (.o) files
130  * -xsb		Compile for use with the WorkShop source browser
131  * -xsbfast	Generate only WorkShop source browser info, no compilation
132  * -xsfpconst	Represent unsuffixed floating point constants as single
133  *		precision
134  * -xspace	Do not do optimizations that increase code size
135  * -xstrconst	Place string literals into read-only data segment
136  * -xtarget=<t>	Specify target system for optimization
137  * -xtemp=<dir>	Set directory for temporary files to <dir>
138  * -xtime	Report the execution time for each compilation phase
139  * -xunroll=n	Enable unrolling loops n times where possible
140  * -Y<c>,<dir>	Specify <dir> for location of component <c> (a,l,m,p,0,h,i,u)
141  * -YA,<dir>	Change default directory searched for components
142  * -YI,<dir>	Change default directory searched for include files
143  * -YP,<dir>	Change default directory for finding libraries files
144  * -YS,<dir>	Change default directory for startup object files
145  */
146 
147 /*
148  * Translation table:
149  */
150 /*
151  * -#				-v
152  * -###				error
153  * -A<name[(tokens)]>		pass-thru
154  * -B<[static|dynamic]>		pass-thru (syntax error for anything else)
155  * -C				pass-thru
156  * -c				pass-thru
157  * -cg92			-m32 -mcpu=v8 -mtune=supersparc (SPARC only)
158  * -D<name[=token]>		pass-thru
159  * -E				pass-thru
160  * -erroff=E_EMPTY_TRANSLATION_UNIT ignore
161  * -errtags=%all		-Wall
162  * -errwarn=%all		-Werror else -Wno-error
163  * -fast			error
164  * -fd				error
165  * -fnonstd			error
166  * -fns[=<yes|no>]		error
167  * -fprecision=<p>		error
168  * -fround=<r>			error
169  * -fsimple[=<n>]		error
170  * -fsingle[=<n>]		error
171  * -ftrap=<t>			error
172  * -fstore			error
173  * -g				pass-thru
174  * -H				pass-thru
175  * -I<dir>			pass-thru
176  * -i				pass-thru
177  * -keeptmp			-save-temps
178  * -L<dir>			pass-thru
179  * -l<name>			pass-thru
180  * -mc				error
181  * -mr				error
182  * -mr,"string"			error
183  * -mt				-D_REENTRANT
184  * -native			error
185  * -nofstore			error
186  * -nolib			-nodefaultlibs
187  * -norunpath			ignore
188  * -O				-O1 (Check the man page to be certain)
189  * -o <outputfile>		pass-thru
190  * -P				-E -o filename.i (or error)
191  * -p				pass-thru
192  * -Q[y|n]			error
193  * -R<dir[:dir]>		pass-thru
194  * -S				pass-thru
195  * -U<name>			pass-thru
196  * -V				--version
197  * -v				-Wall
198  * -Wa,<arg>			pass-thru
199  * -Wp,<arg>			pass-thru except -xc99=<a>
200  * -Wl,<arg>			pass-thru
201  * -W{m,0,2,h,i,u>		error/ignore
202  * -xmodel=kernel		-ffreestanding -mcmodel=kernel -mno-red-zone
203  * -Wu,-save_args		-msave-args
204  * -w				pass-thru
205  * -Xa				-std=iso9899:199409 or -ansi
206  * -Xt				error
207  * -Xs				-traditional -std=c89
208  * -xarch=<a>			table
209  * -xbuiltin[=<b>]		-fbuiltin (-fno-builtin otherwise)
210  * -xCC				ignore
211  * -xchip=<c>			table
212  * -xcode=<c>			table
213  * -xcrossfile[=<n>]		ignore
214  * -xe				error
215  * -xF				error
216  * -xhelp=<f>			error
217  * -xildoff			ignore
218  * -xildon			ignore
219  * -xinline			ignore
220  * -xlibmieee			error
221  * -xlibmil			error
222  * -xlic_lib=sunperf		error
223  * -xmaxopt=[...]		error
224  * -xO<n>			-O<n>
225  * -xP				error
226  * -xprofile=<p>		error
227  * -xregs=<r>			table
228  * -xs				error
229  * -xsb				error
230  * -xsbfast			error
231  * -xsfpconst			error
232  * -xspace			ignore (-not -Os)
233  * -xstrconst			ignore
234  * -xtarget=<t>			table
235  * -xtemp=<dir>			error
236  * -xtime			error
237  * -xtransition			-Wtransition
238  * -xunroll=n			error
239  * -Y<c>,<dir>			error
240  * -YA,<dir>			error
241  * -YI,<dir>			-nostdinc -I<dir>
242  * -YP,<dir>			error
243  * -YS,<dir>			error
244  */
245 
246 #include <ctype.h>
247 #include <err.h>
248 #include <errno.h>
249 #include <fcntl.h>
250 #include <getopt.h>
251 #include <stdio.h>
252 #include <stdlib.h>
253 #include <stdbool.h>
254 #include <string.h>
255 #include <unistd.h>
256 #include <dirent.h>
257 
258 #include <sys/param.h>
259 #include <sys/stat.h>
260 #include <sys/types.h>
261 #include <sys/utsname.h>
262 #include <sys/wait.h>
263 
264 #define	CW_F_CXX	0x01
265 #define	CW_F_SHADOW	0x02
266 #define	CW_F_EXEC	0x04
267 #define	CW_F_ECHO	0x08
268 #define	CW_F_XLATE	0x10
269 #define	CW_F_PROG	0x20
270 
271 typedef enum cw_op {
272 	CW_O_NONE = 0,
273 	CW_O_PREPROCESS,
274 	CW_O_COMPILE,
275 	CW_O_LINK
276 } cw_op_t;
277 
278 struct aelist {
279 	struct ae {
280 		struct ae *ae_next;
281 		char *ae_arg;
282 	} *ael_head, *ael_tail;
283 	int ael_argc;
284 };
285 
286 typedef enum {
287 	GNU,
288 	SUN,
289 	SMATCH
290 } compiler_style_t;
291 
292 typedef struct {
293 	char *c_name;
294 	char *c_path;
295 	compiler_style_t c_style;
296 } cw_compiler_t;
297 
298 typedef struct cw_ictx {
299 	struct cw_ictx	*i_next;
300 	cw_compiler_t	*i_compiler;
301 	char		*i_linker;
302 	struct aelist	*i_ae;
303 	uint32_t	i_flags;
304 	int		i_oldargc;
305 	char		**i_oldargv;
306 	pid_t		i_pid;
307 	char		*i_tmpdir;
308 	char		*i_stderr;
309 } cw_ictx_t;
310 
311 /*
312  * Status values to indicate which Studio compiler and associated
313  * flags are being used.
314  */
315 #define	M32		0x01	/* -m32 - only on Studio 12 */
316 #define	M64		0x02	/* -m64 - only on Studio 12 */
317 #define	SS11		0x100	/* Studio 11 */
318 #define	SS12		0x200	/* Studio 12 */
319 
320 #define	TRANS_ENTRY	5
321 /*
322  * Translation table definition for the -xarch= flag. The "x_arg"
323  * value is translated into the appropriate gcc flags according
324  * to the values in x_trans[n]. The x_flags indicates what compiler
325  * is being used and what flags have been set via the use of
326  * "x_arg".
327  */
328 typedef struct xarch_table {
329 	char	*x_arg;
330 	int	x_flags;
331 	char	*x_trans[TRANS_ENTRY];
332 } xarch_table_t;
333 
334 /*
335  * The translation table for the -xarch= flag used in the Studio compilers.
336  */
337 static const xarch_table_t xtbl[] = {
338 #if defined(__x86)
339 	{ "generic",	SS11, {NULL} },
340 	{ "generic64",	(SS11|M64), { "-m64", "-mtune=opteron" } },
341 	{ "amd64",	(SS11|M64), { "-m64", "-mtune=opteron" } },
342 	{ "386",	SS11,	{ "-march=i386" } },
343 	{ "pentium_pro", SS11,	{ "-march=pentiumpro" } },
344 	{ "sse",	SS11, { "-msse", "-mfpmath=sse" } },
345 	{ "sse2",	SS11, { "-msse2", "-mfpmath=sse" } },
346 #elif defined(__sparc)
347 	{ "generic",	(SS11|M32), { "-m32", "-mcpu=v8" } },
348 	{ "generic64",	(SS11|M64), { "-m64", "-mcpu=v9" } },
349 	{ "v8",		(SS11|M32), { "-m32", "-mcpu=v8", "-mno-v8plus" } },
350 	{ "v8plus",	(SS11|M32), { "-m32", "-mcpu=v9", "-mv8plus" } },
351 	{ "v8plusa",	(SS11|M32), { "-m32", "-mcpu=ultrasparc", "-mv8plus",
352 			"-mvis" } },
353 	{ "v8plusb",	(SS11|M32), { "-m32", "-mcpu=ultrasparc3", "-mv8plus",
354 			"-mvis" } },
355 	{ "v9",		(SS11|M64), { "-m64", "-mcpu=v9" } },
356 	{ "v9a",	(SS11|M64), { "-m64", "-mcpu=ultrasparc", "-mvis" } },
357 	{ "v9b",	(SS11|M64), { "-m64", "-mcpu=ultrasparc3", "-mvis" } },
358 	{ "sparc",	SS12, { "-mcpu=v9", "-mv8plus" } },
359 	{ "sparcvis",	SS12, { "-mcpu=ultrasparc", "-mvis" } },
360 	{ "sparcvis2",	SS12, { "-mcpu=ultrasparc3", "-mvis" } }
361 #endif
362 };
363 
364 static int xtbl_size = sizeof (xtbl) / sizeof (xarch_table_t);
365 
366 static const char *xchip_tbl[] = {
367 #if defined(__x86)
368 	"386",		"-mtune=i386", NULL,
369 	"486",		"-mtune=i486", NULL,
370 	"pentium",	"-mtune=pentium", NULL,
371 	"pentium_pro",  "-mtune=pentiumpro", NULL,
372 #elif defined(__sparc)
373 	"super",	"-mtune=supersparc", NULL,
374 	"ultra",	"-mtune=ultrasparc", NULL,
375 	"ultra3",	"-mtune=ultrasparc3", NULL,
376 #endif
377 	NULL,		NULL
378 };
379 
380 static const char *xcode_tbl[] = {
381 #if defined(__sparc)
382 	"abs32",	"-fno-pic", "-mcmodel=medlow", NULL,
383 	"abs44",	"-fno-pic", "-mcmodel=medmid", NULL,
384 	"abs64",	"-fno-pic", "-mcmodel=medany", NULL,
385 	"pic13",	"-fpic", NULL,
386 	"pic32",	"-fPIC", NULL,
387 #endif
388 	NULL,		NULL
389 };
390 
391 static const char *xtarget_tbl[] = {
392 #if defined(__x86)
393 	"pentium_pro",	"-march=pentiumpro", NULL,
394 #endif	/* __x86 */
395 	NULL,		NULL
396 };
397 
398 static const char *xregs_tbl[] = {
399 #if defined(__sparc)
400 	"appl",		"-mapp-regs", NULL,
401 	"no%appl",	"-mno-app-regs", NULL,
402 	"float",	"-mfpu", NULL,
403 	"no%float",	"-mno-fpu", NULL,
404 #endif	/* __sparc */
405 	NULL,		NULL
406 };
407 
408 static void
nomem(void)409 nomem(void)
410 {
411 	errx(1, "out of memory");
412 }
413 
414 static void
newae(struct aelist * ael,const char * arg)415 newae(struct aelist *ael, const char *arg)
416 {
417 	struct ae *ae;
418 
419 	if ((ae = calloc(1, sizeof (*ae))) == NULL)
420 		nomem();
421 	ae->ae_arg = strdup(arg);
422 	if (ael->ael_tail == NULL)
423 		ael->ael_head = ae;
424 	else
425 		ael->ael_tail->ae_next = ae;
426 	ael->ael_tail = ae;
427 	ael->ael_argc++;
428 }
429 
430 static cw_ictx_t *
newictx(void)431 newictx(void)
432 {
433 	cw_ictx_t *ctx = calloc(1, sizeof (cw_ictx_t));
434 	if (ctx)
435 		if ((ctx->i_ae = calloc(1, sizeof (struct aelist))) == NULL) {
436 			free(ctx);
437 			return (NULL);
438 		}
439 
440 	return (ctx);
441 }
442 
443 static void
error(const char * arg)444 error(const char *arg)
445 {
446 	errx(2, "error: mapping failed at or near arg '%s'", arg);
447 }
448 
449 /*
450  * Add the current favourite set of warnings to the gcc invocation.
451  */
452 static void
warnings(struct aelist * h)453 warnings(struct aelist *h)
454 {
455 	static int warningsonce;
456 
457 	if (warningsonce++)
458 		return;
459 
460 	/*
461 	 * Enable as many warnings as exist, then disable those that we never
462 	 * ever want.
463 	 */
464 	newae(h, "-Wall");
465 	newae(h, "-Wextra");
466 }
467 
468 static void
optim_disable(struct aelist * h,int level)469 optim_disable(struct aelist *h, int level)
470 {
471 	if (level >= 2) {
472 		newae(h, "-fno-strict-aliasing");
473 		newae(h, "-fno-unit-at-a-time");
474 		newae(h, "-fno-optimize-sibling-calls");
475 	}
476 }
477 
478 static void
Xsmode(struct aelist * h)479 Xsmode(struct aelist *h)
480 {
481 	static int xsonce;
482 
483 	if (xsonce++)
484 		return;
485 
486 	newae(h, "-traditional");
487 	newae(h, "-traditional-cpp");
488 }
489 
490 static void
usage(void)491 usage(void)
492 {
493 	extern char *__progname;
494 	(void) fprintf(stderr,
495 	    "usage: %s [-C] [--versions] --primary <compiler> "
496 	    "[--shadow <compiler>]... -- cflags...\n",
497 	    __progname);
498 	(void) fprintf(stderr, "compilers take the form: name,path,style\n"
499 	    " - name: a unique name usable in flag specifiers\n"
500 	    " - path: path to the compiler binary\n"
501 	    " - style: the style of flags expected: either sun or gnu\n");
502 	exit(2);
503 }
504 
505 static int
xlate_xtb(struct aelist * h,const char * xarg)506 xlate_xtb(struct aelist *h, const char *xarg)
507 {
508 	int	i, j;
509 
510 	for (i = 0; i < xtbl_size; i++) {
511 		if (strcmp(xtbl[i].x_arg, xarg) == 0)
512 			break;
513 	}
514 
515 	/*
516 	 * At the end of the table and so no matching "arg" entry
517 	 * found and so this must be a bad -xarch= flag.
518 	 */
519 	if (i == xtbl_size)
520 		error(xarg);
521 
522 	for (j = 0; j < TRANS_ENTRY; j++) {
523 		if (xtbl[i].x_trans[j] != NULL)
524 			newae(h, xtbl[i].x_trans[j]);
525 		else
526 			break;
527 	}
528 	return (xtbl[i].x_flags);
529 
530 }
531 
532 static void
xlate(struct aelist * h,const char * xarg,const char ** table)533 xlate(struct aelist *h, const char *xarg, const char **table)
534 {
535 	while (*table != NULL && strcmp(xarg, *table) != 0) {
536 		while (*table != NULL)
537 			table++;
538 		table++;
539 	}
540 
541 	if (*table == NULL)
542 		error(xarg);
543 
544 	table++;
545 
546 	while (*table != NULL) {
547 		newae(h, *table);
548 		table++;
549 	}
550 }
551 
552 /*
553  * The compiler wants the output file to end in appropriate extension.  If
554  * we're generating a name from whole cloth (path == NULL), we assume that
555  * extension to be .o, otherwise we match the extension of the caller.
556  */
557 static char *
discard_file_name(cw_ictx_t * ctx,const char * path)558 discard_file_name(cw_ictx_t *ctx, const char *path)
559 {
560 	char *ret, *ext;
561 	char tmpl[] = "cwXXXXXX";
562 
563 	if (path == NULL) {
564 		ext = ".o";
565 	} else {
566 		ext = strrchr(path, '.');
567 	}
568 
569 	/*
570 	 * We need absolute control over where the temporary file goes, since
571 	 * we rely on it for cleanup so tempnam(3C) and tmpnam(3C) are
572 	 * inappropriate (they use TMPDIR, preferentially).
573 	 *
574 	 * mkstemp(3C) doesn't actually help us, since the temporary file
575 	 * isn't used by us, only its name.
576 	 */
577 	if (mktemp(tmpl) == NULL)
578 		nomem();
579 
580 	(void) asprintf(&ret, "%s/%s%s", ctx->i_tmpdir, tmpl,
581 	    (ext != NULL) ? ext : "");
582 
583 	if (ret == NULL)
584 		nomem();
585 
586 	return (ret);
587 }
588 
589 static bool
is_source_file(const char * path)590 is_source_file(const char *path)
591 {
592 	char *ext = strrchr(path, '.');
593 
594 	if ((ext == NULL) || (*(ext + 1) == '\0'))
595 		return (false);
596 
597 	ext += 1;
598 
599 	if ((strcasecmp(ext, "c") == 0) ||
600 	    (strcmp(ext, "cc") == 0) ||
601 	    (strcmp(ext, "i") == 0) ||
602 	    (strcasecmp(ext, "s") == 0) ||
603 	    (strcmp(ext, "cpp") == 0)) {
604 		return (true);
605 	}
606 
607 	return (false);
608 }
609 
610 
611 static void
do_gcc(cw_ictx_t * ctx)612 do_gcc(cw_ictx_t *ctx)
613 {
614 	int c;
615 	int nolibc = 0;
616 	int in_output = 0, seen_o = 0, c_files = 0;
617 	cw_op_t op = CW_O_LINK;
618 	char *model = NULL;
619 	char *nameflag;
620 	int mflag = 0;
621 
622 	if (ctx->i_flags & CW_F_PROG) {
623 		newae(ctx->i_ae, "--version");
624 		return;
625 	}
626 
627 	newae(ctx->i_ae, "-fident");
628 	newae(ctx->i_ae, "-finline");
629 	newae(ctx->i_ae, "-fno-inline-functions");
630 	newae(ctx->i_ae, "-fno-builtin");
631 	newae(ctx->i_ae, "-fno-asm");
632 	newae(ctx->i_ae, "-fdiagnostics-show-option");
633 	newae(ctx->i_ae, "-nodefaultlibs");
634 
635 #if defined(__sparc)
636 	/*
637 	 * The SPARC ldd and std instructions require 8-byte alignment of
638 	 * their address operand.  gcc correctly uses them only when the
639 	 * ABI requires 8-byte alignment; unfortunately we have a number of
640 	 * pieces of buggy code that doesn't conform to the ABI.  This
641 	 * flag makes gcc work more like Studio with -xmemalign=4.
642 	 */
643 	newae(ctx->i_ae, "-mno-integer-ldd-std");
644 #endif
645 
646 	/*
647 	 * This is needed because 'u' is defined
648 	 * under a conditional on 'sun'.  Should
649 	 * probably just remove the conditional,
650 	 * or make it be dependent on '__sun'.
651 	 *
652 	 * -Dunix is also missing in enhanced ANSI mode
653 	 */
654 	newae(ctx->i_ae, "-D__sun");
655 
656 	if (asprintf(&nameflag, "-_%s=", ctx->i_compiler->c_name) == -1)
657 		nomem();
658 
659 	/*
660 	 * Walk the argument list, translating as we go ..
661 	 */
662 	while (--ctx->i_oldargc > 0) {
663 		char *arg = *++ctx->i_oldargv;
664 		size_t arglen = strlen(arg);
665 
666 		if (*arg == '-') {
667 			arglen--;
668 		} else {
669 			/*
670 			 * Discard inline files that gcc doesn't grok
671 			 */
672 			if (!in_output && arglen > 3 &&
673 			    strcmp(arg + arglen - 3, ".il") == 0)
674 				continue;
675 
676 			if (!in_output && is_source_file(arg))
677 				c_files++;
678 
679 			/*
680 			 * Otherwise, filenames and partial arguments
681 			 * are passed through for gcc to chew on.  However,
682 			 * output is always discarded for the secondary
683 			 * compiler.
684 			 */
685 			if ((ctx->i_flags & CW_F_SHADOW) && in_output) {
686 				newae(ctx->i_ae, discard_file_name(ctx, arg));
687 			} else {
688 				newae(ctx->i_ae, arg);
689 			}
690 			in_output = 0;
691 			continue;
692 		}
693 
694 		if (ctx->i_flags & CW_F_CXX) {
695 			if (strncmp(arg, "-_g++=", 6) == 0) {
696 				newae(ctx->i_ae, strchr(arg, '=') + 1);
697 				continue;
698 			}
699 			if (strncmp(arg, "-compat=", 8) == 0) {
700 				/* discard -compat=4 and -compat=5 */
701 				continue;
702 			}
703 			if (strcmp(arg, "-Qoption") == 0) {
704 				/* discard -Qoption and its two arguments */
705 				if (ctx->i_oldargc < 3)
706 					error(arg);
707 				ctx->i_oldargc -= 2;
708 				ctx->i_oldargv += 2;
709 				continue;
710 			}
711 			if (strcmp(arg, "-xwe") == 0) {
712 				/* turn warnings into errors */
713 				newae(ctx->i_ae, "-Werror");
714 				continue;
715 			}
716 			if (strcmp(arg, "-norunpath") == 0) {
717 				/* gcc has no corresponding option */
718 				continue;
719 			}
720 			if (strcmp(arg, "-nolib") == 0) {
721 				/* -nodefaultlibs is on by default */
722 				nolibc = 1;
723 				continue;
724 			}
725 #if defined(__sparc)
726 			if (strcmp(arg, "-cg92") == 0) {
727 				mflag |= xlate_xtb(ctx->i_ae, "v8");
728 				xlate(ctx->i_ae, "super", xchip_tbl);
729 				continue;
730 			}
731 #endif	/* __sparc */
732 		}
733 
734 		switch ((c = arg[1])) {
735 		case '_':
736 			if ((strncmp(arg, nameflag, strlen(nameflag)) == 0) ||
737 			    (strncmp(arg, "-_gcc=", 6) == 0) ||
738 			    (strncmp(arg, "-_gnu=", 6) == 0)) {
739 				newae(ctx->i_ae, strchr(arg, '=') + 1);
740 			}
741 			break;
742 		case '#':
743 			if (arglen == 1) {
744 				newae(ctx->i_ae, "-v");
745 				break;
746 			}
747 			error(arg);
748 			break;
749 		case 'f':
750 			if ((strcmp(arg, "-fpic") == 0) ||
751 			    (strcmp(arg, "-fPIC") == 0)) {
752 				newae(ctx->i_ae, arg);
753 				break;
754 			}
755 			error(arg);
756 			break;
757 		case 'E':
758 			if (arglen == 1) {
759 				newae(ctx->i_ae, "-xc");
760 				newae(ctx->i_ae, arg);
761 				op = CW_O_PREPROCESS;
762 				nolibc = 1;
763 				break;
764 			}
765 			error(arg);
766 			break;
767 		case 'c':
768 		case 'S':
769 			if (arglen == 1) {
770 				op = CW_O_COMPILE;
771 				nolibc = 1;
772 			}
773 			/* FALLTHROUGH */
774 		case 'C':
775 		case 'H':
776 		case 'p':
777 			if (arglen == 1) {
778 				newae(ctx->i_ae, arg);
779 				break;
780 			}
781 			error(arg);
782 			break;
783 		case 'A':
784 		case 'g':
785 		case 'I':
786 		case 'i':
787 		case 'L':
788 		case 'l':
789 		case 'R':
790 		case 'U':
791 		case 'u':
792 		case 'w':
793 			newae(ctx->i_ae, arg);
794 			break;
795 		case 'o':
796 			seen_o = 1;
797 			if (arglen == 1) {
798 				in_output = 1;
799 				newae(ctx->i_ae, arg);
800 			} else if (ctx->i_flags & CW_F_SHADOW) {
801 				newae(ctx->i_ae, "-o");
802 				newae(ctx->i_ae, discard_file_name(ctx, arg));
803 			} else {
804 				newae(ctx->i_ae, arg);
805 			}
806 			break;
807 		case 'D':
808 			newae(ctx->i_ae, arg);
809 			/*
810 			 * XXX	Clearly a hack ... do we need _KADB too?
811 			 */
812 			if (strcmp(arg, "-D_KERNEL") == 0 ||
813 			    strcmp(arg, "-D_BOOT") == 0)
814 				newae(ctx->i_ae, "-ffreestanding");
815 			break;
816 		case 'd':
817 			if (strcmp(arg, "-dalign") == 0) {
818 				/*
819 				 * -dalign forces alignment in some cases;
820 				 * gcc does not need any flag to do this.
821 				 */
822 				break;
823 			}
824 			error(arg);
825 			break;
826 		case 'e':
827 			if (strcmp(arg,
828 			    "-erroff=E_EMPTY_TRANSLATION_UNIT") == 0) {
829 				/*
830 				 * Accept but ignore this -- gcc doesn't
831 				 * seem to complain about empty translation
832 				 * units
833 				 */
834 				break;
835 			}
836 			/* XX64 -- ignore all -erroff= options, for now */
837 			if (strncmp(arg, "-erroff=", 8) == 0)
838 				break;
839 			if (strcmp(arg, "-errtags=yes") == 0) {
840 				warnings(ctx->i_ae);
841 				break;
842 			}
843 			if (strcmp(arg, "-errwarn=%all") == 0) {
844 				newae(ctx->i_ae, "-Werror");
845 				break;
846 			}
847 			error(arg);
848 			break;
849 		case 'k':
850 			if (strcmp(arg, "-keeptmp") == 0) {
851 				newae(ctx->i_ae, "-save-temps");
852 				break;
853 			}
854 			error(arg);
855 			break;
856 		case 'm':
857 			if (strcmp(arg, "-mt") == 0) {
858 				newae(ctx->i_ae, "-D_REENTRANT");
859 				break;
860 			}
861 			if (strcmp(arg, "-m64") == 0) {
862 				newae(ctx->i_ae, "-m64");
863 #if defined(__x86)
864 				newae(ctx->i_ae, "-mtune=opteron");
865 #endif
866 				mflag |= M64;
867 				break;
868 			}
869 			if (strcmp(arg, "-m32") == 0) {
870 				newae(ctx->i_ae, "-m32");
871 				mflag |= M32;
872 				break;
873 			}
874 			error(arg);
875 			break;
876 		case 'O':
877 			if (arglen == 1) {
878 				newae(ctx->i_ae, "-O");
879 				break;
880 			}
881 			error(arg);
882 			break;
883 		case 'P':
884 			/*
885 			 * We could do '-E -o filename.i', but that's hard,
886 			 * and we don't need it for the case that's triggering
887 			 * this addition.  We'll require the user to specify
888 			 * -o in the Makefile.  If they don't they'll find out
889 			 * in a hurry.
890 			 */
891 			newae(ctx->i_ae, "-E");
892 			op = CW_O_PREPROCESS;
893 			nolibc = 1;
894 			break;
895 		case 's':
896 			if (strcmp(arg, "-shared") == 0) {
897 				newae(ctx->i_ae, "-shared");
898 				nolibc = 1;
899 				break;
900 			}
901 			error(arg);
902 			break;
903 
904 		case 'V':
905 			if (arglen == 1) {
906 				ctx->i_flags &= ~CW_F_ECHO;
907 				newae(ctx->i_ae, "--version");
908 				break;
909 			}
910 			error(arg);
911 			break;
912 		case 'v':
913 			if (arglen == 1) {
914 				warnings(ctx->i_ae);
915 				break;
916 			}
917 			error(arg);
918 			break;
919 		case 'W':
920 			if (strncmp(arg, "-Wp,-xc99", 9) == 0) {
921 				/*
922 				 * gcc's preprocessor will accept c99
923 				 * regardless, so accept and ignore.
924 				 */
925 				break;
926 			}
927 			if (strncmp(arg, "-Wa,", 4) == 0 ||
928 			    strncmp(arg, "-Wp,", 4) == 0 ||
929 			    strncmp(arg, "-Wl,", 4) == 0) {
930 				newae(ctx->i_ae, arg);
931 				break;
932 			}
933 			if (strcmp(arg, "-W0,-noglobal") == 0 ||
934 			    strcmp(arg, "-W0,-xglobalstatic") == 0) {
935 				/*
936 				 * gcc doesn't prefix local symbols
937 				 * in debug mode, so this is not needed.
938 				 */
939 				break;
940 			}
941 			if (strcmp(arg, "-W0,-Lt") == 0) {
942 				/*
943 				 * Generate tests at the top of loops.
944 				 * There is no direct gcc equivalent, ignore.
945 				 */
946 				break;
947 			}
948 			if (strcmp(arg, "-W2,-xwrap_int") == 0) {
949 				/*
950 				 * Use the legacy behaviour (pre-SS11)
951 				 * for integer wrapping.
952 				 * gcc does not need this.
953 				 */
954 				break;
955 			}
956 			if (strcmp(arg, "-Wd,-xsafe=unboundsym") == 0) {
957 				/*
958 				 * Prevents optimizing away checks for
959 				 * unbound weak symbol addresses.  gcc does
960 				 * not do this, so it's not needed.
961 				 */
962 				break;
963 			}
964 			if (strncmp(arg, "-Wc,-xcode=", 11) == 0) {
965 				xlate(ctx->i_ae, arg + 11, xcode_tbl);
966 				break;
967 			}
968 			if (strncmp(arg, "-Wc,-Qiselect", 13) == 0) {
969 				/*
970 				 * Prevents insertion of register symbols.
971 				 * gcc doesn't do this, so ignore it.
972 				 */
973 				break;
974 			}
975 			if (strcmp(arg, "-Wc,-Qassembler-ounrefsym=0") == 0) {
976 				/*
977 				 * Prevents optimizing away of static variables.
978 				 * gcc does not do this, so it's not needed.
979 				 */
980 				break;
981 			}
982 #if defined(__x86)
983 			if (strcmp(arg, "-Wu,-save_args") == 0) {
984 				newae(ctx->i_ae, "-msave-args");
985 				break;
986 			}
987 #endif	/* __x86 */
988 			error(arg);
989 			break;
990 		case 'X':
991 			if (strcmp(arg, "-Xa") == 0 ||
992 			    strcmp(arg, "-Xt") == 0) {
993 				break;
994 			}
995 			if (strcmp(arg, "-Xs") == 0) {
996 				Xsmode(ctx->i_ae);
997 				break;
998 			}
999 			error(arg);
1000 			break;
1001 		case 'x':
1002 			if (arglen == 1)
1003 				error(arg);
1004 			switch (arg[2]) {
1005 			case 'a':
1006 				if (strncmp(arg, "-xarch=", 7) == 0) {
1007 					mflag |= xlate_xtb(ctx->i_ae, arg + 7);
1008 					break;
1009 				}
1010 				error(arg);
1011 				break;
1012 			case 'b':
1013 				if (strncmp(arg, "-xbuiltin=", 10) == 0) {
1014 					if (strcmp(arg + 10, "%all"))
1015 						newae(ctx->i_ae, "-fbuiltin");
1016 					break;
1017 				}
1018 				error(arg);
1019 				break;
1020 			case 'C':
1021 				/* Accept C++ style comments -- ignore */
1022 				if (strcmp(arg, "-xCC") == 0)
1023 					break;
1024 				error(arg);
1025 				break;
1026 			case 'c':
1027 				if (strncmp(arg, "-xc99=%all", 10) == 0) {
1028 					newae(ctx->i_ae, "-std=gnu99");
1029 					break;
1030 				}
1031 				if (strncmp(arg, "-xc99=%none", 11) == 0) {
1032 					newae(ctx->i_ae, "-std=gnu89");
1033 					break;
1034 				}
1035 				if (strncmp(arg, "-xchip=", 7) == 0) {
1036 					xlate(ctx->i_ae, arg + 7, xchip_tbl);
1037 					break;
1038 				}
1039 				if (strncmp(arg, "-xcode=", 7) == 0) {
1040 					xlate(ctx->i_ae, arg + 7, xcode_tbl);
1041 					break;
1042 				}
1043 				if (strncmp(arg, "-xcrossfile", 11) == 0)
1044 					break;
1045 				error(arg);
1046 				break;
1047 			case 'F':
1048 				/*
1049 				 * Compile for mapfile reordering, or unused
1050 				 * section elimination, syntax can be -xF or
1051 				 * more complex, like -xF=%all -- ignore.
1052 				 */
1053 				if (strncmp(arg, "-xF", 3) == 0)
1054 					break;
1055 				error(arg);
1056 				break;
1057 			case 'i':
1058 				if (strncmp(arg, "-xinline", 8) == 0)
1059 					/* No inlining; ignore */
1060 					break;
1061 				if (strcmp(arg, "-xildon") == 0 ||
1062 				    strcmp(arg, "-xildoff") == 0)
1063 					/* No incremental linking; ignore */
1064 					break;
1065 				error(arg);
1066 				break;
1067 #if defined(__x86)
1068 			case 'm':
1069 				if (strcmp(arg, "-xmodel=kernel") == 0) {
1070 					newae(ctx->i_ae, "-ffreestanding");
1071 					newae(ctx->i_ae, "-mno-red-zone");
1072 					model = "-mcmodel=kernel";
1073 					nolibc = 1;
1074 					break;
1075 				}
1076 				error(arg);
1077 				break;
1078 #endif	/* __x86 */
1079 			case 'O':
1080 				if (strncmp(arg, "-xO", 3) == 0) {
1081 					size_t len = strlen(arg);
1082 					char *s = NULL;
1083 					int c = *(arg + 3);
1084 					int level;
1085 
1086 					if (len != 4 || !isdigit(c))
1087 						error(arg);
1088 
1089 					level = atoi(arg + 3);
1090 					if (level > 5)
1091 						error(arg);
1092 					if (level >= 2) {
1093 						/*
1094 						 * For gcc-3.4.x at -O2 we
1095 						 * need to disable optimizations
1096 						 * that break ON.
1097 						 */
1098 						optim_disable(ctx->i_ae, level);
1099 						/*
1100 						 * limit -xO3 to -O2 as well.
1101 						 */
1102 						level = 2;
1103 					}
1104 					if (asprintf(&s, "-O%d", level) == -1)
1105 						nomem();
1106 					newae(ctx->i_ae, s);
1107 					free(s);
1108 					break;
1109 				}
1110 				error(arg);
1111 				break;
1112 			case 'r':
1113 				if (strncmp(arg, "-xregs=", 7) == 0) {
1114 					xlate(ctx->i_ae, arg + 7, xregs_tbl);
1115 					break;
1116 				}
1117 				error(arg);
1118 				break;
1119 			case 's':
1120 				if (strcmp(arg, "-xs") == 0 ||
1121 				    strcmp(arg, "-xspace") == 0 ||
1122 				    strcmp(arg, "-xstrconst") == 0)
1123 					break;
1124 				error(arg);
1125 				break;
1126 			case 't':
1127 				if (strncmp(arg, "-xtarget=", 9) == 0) {
1128 					xlate(ctx->i_ae, arg + 9, xtarget_tbl);
1129 					break;
1130 				}
1131 				error(arg);
1132 				break;
1133 			case 'e':
1134 			case 'h':
1135 			case 'l':
1136 			default:
1137 				error(arg);
1138 				break;
1139 			}
1140 			break;
1141 		case 'Y':
1142 			if (arglen == 1) {
1143 				if ((arg = *++ctx->i_oldargv) == NULL ||
1144 				    *arg == '\0')
1145 					error("-Y");
1146 				ctx->i_oldargc--;
1147 				arglen = strlen(arg + 1);
1148 			} else {
1149 				arg += 2;
1150 			}
1151 			/* Just ignore -YS,... for now */
1152 			if (strncmp(arg, "S,", 2) == 0)
1153 				break;
1154 			if (strncmp(arg, "I,", 2) == 0) {
1155 				char *s = strdup(arg);
1156 				s[0] = '-';
1157 				s[1] = 'I';
1158 				newae(ctx->i_ae, "-nostdinc");
1159 				newae(ctx->i_ae, s);
1160 				free(s);
1161 				break;
1162 			}
1163 			error(arg);
1164 			break;
1165 		case 'Q':
1166 			/*
1167 			 * We could map -Qy into -Wl,-Qy etc.
1168 			 */
1169 		default:
1170 			error(arg);
1171 			break;
1172 		}
1173 	}
1174 
1175 	free(nameflag);
1176 
1177 	/*
1178 	 * When compiling multiple source files in a single invocation some
1179 	 * compilers output objects into the current directory with
1180 	 * predictable and conventional names.
1181 	 *
1182 	 * We prevent any attempt to compile multiple files at once so that
1183 	 * any such objects created by a shadow can't escape into a later
1184 	 * link-edit.
1185 	 */
1186 	if (c_files > 1 && op != CW_O_PREPROCESS) {
1187 		errx(2, "multiple source files are "
1188 		    "allowed only with -E or -P");
1189 	}
1190 
1191 	/*
1192 	 * Make sure that we do not have any unintended interactions between
1193 	 * the xarch options passed in and the version of the Studio compiler
1194 	 * used.
1195 	 */
1196 	if ((mflag & (SS11|SS12)) == (SS11|SS12)) {
1197 		errx(2,
1198 		    "Conflicting \"-xarch=\" flags (both Studio 11 and 12)\n");
1199 	}
1200 
1201 	switch (mflag) {
1202 	case 0:
1203 		/* FALLTHROUGH */
1204 	case M32:
1205 #if defined(__sparc)
1206 		/*
1207 		 * Only -m32 is defined and so put in the missing xarch
1208 		 * translation.
1209 		 */
1210 		newae(ctx->i_ae, "-mcpu=v8");
1211 		newae(ctx->i_ae, "-mno-v8plus");
1212 #endif
1213 		break;
1214 	case M64:
1215 #if defined(__sparc)
1216 		/*
1217 		 * Only -m64 is defined and so put in the missing xarch
1218 		 * translation.
1219 		 */
1220 		newae(ctx->i_ae, "-mcpu=v9");
1221 #endif
1222 		break;
1223 	case SS12:
1224 #if defined(__sparc)
1225 		/* no -m32/-m64 flag used - this is an error for sparc builds */
1226 		(void) fprintf(stderr, "No -m32/-m64 flag defined\n");
1227 		exit(2);
1228 #endif
1229 		break;
1230 	case SS11:
1231 		/* FALLTHROUGH */
1232 	case (SS11|M32):
1233 	case (SS11|M64):
1234 		break;
1235 	case (SS12|M32):
1236 #if defined(__sparc)
1237 		/*
1238 		 * Need to add in further 32 bit options because with SS12
1239 		 * the xarch=sparcvis option can be applied to 32 or 64
1240 		 * bit, and so the translatation table (xtbl) cannot handle
1241 		 * that.
1242 		 */
1243 		newae(ctx->i_ae, "-mv8plus");
1244 #endif
1245 		break;
1246 	case (SS12|M64):
1247 		break;
1248 	default:
1249 		(void) fprintf(stderr,
1250 		    "Incompatible -xarch= and/or -m32/-m64 options used.\n");
1251 		exit(2);
1252 	}
1253 
1254 	if (ctx->i_flags & CW_F_SHADOW) {
1255 		if (op == CW_O_PREPROCESS)
1256 			exit(0);
1257 		else if (op == CW_O_LINK && c_files == 0)
1258 			exit(0);
1259 	}
1260 
1261 	if (model != NULL)
1262 		newae(ctx->i_ae, model);
1263 	if (!nolibc)
1264 		newae(ctx->i_ae, "-lc");
1265 	if (!seen_o && (ctx->i_flags & CW_F_SHADOW)) {
1266 		newae(ctx->i_ae, "-o");
1267 		newae(ctx->i_ae, discard_file_name(ctx, NULL));
1268 	}
1269 }
1270 
1271 static void
do_smatch(cw_ictx_t * ctx)1272 do_smatch(cw_ictx_t *ctx)
1273 {
1274 	if (ctx->i_flags & CW_F_PROG) {
1275 		newae(ctx->i_ae, "--version");
1276 		return;
1277 	}
1278 
1279 	/*
1280 	 * Some sources shouldn't run smatch at all.
1281 	 */
1282 	for (int i = 0; i < ctx->i_oldargc; i++) {
1283 		char *arg = ctx->i_oldargv[i];
1284 
1285 		if (strcmp(arg, "-_smatch=off") == 0) {
1286 			ctx->i_flags &= ~ (CW_F_EXEC | CW_F_ECHO);
1287 			return;
1288 		}
1289 	}
1290 
1291 	/*
1292 	 * smatch can handle gcc's options.
1293 	 */
1294 	do_gcc(ctx);
1295 }
1296 
1297 static void
do_cc(cw_ictx_t * ctx)1298 do_cc(cw_ictx_t *ctx)
1299 {
1300 	int in_output = 0, seen_o = 0, c_files = 0;
1301 	cw_op_t op = CW_O_LINK;
1302 	char *nameflag;
1303 
1304 	if (ctx->i_flags & CW_F_PROG) {
1305 		newae(ctx->i_ae, "-V");
1306 		return;
1307 	}
1308 
1309 	if (asprintf(&nameflag, "-_%s=", ctx->i_compiler->c_name) == -1)
1310 		nomem();
1311 
1312 	while (--ctx->i_oldargc > 0) {
1313 		char *arg = *++ctx->i_oldargv;
1314 
1315 		if (strncmp(arg, "-_CC=", 5) == 0) {
1316 			newae(ctx->i_ae, strchr(arg, '=') + 1);
1317 			continue;
1318 		}
1319 
1320 		if (*arg != '-') {
1321 			if (!in_output && is_source_file(arg))
1322 				c_files++;
1323 
1324 			if (in_output == 0 || !(ctx->i_flags & CW_F_SHADOW)) {
1325 				newae(ctx->i_ae, arg);
1326 			} else {
1327 				in_output = 0;
1328 				newae(ctx->i_ae, discard_file_name(ctx, arg));
1329 			}
1330 			continue;
1331 		}
1332 		switch (*(arg + 1)) {
1333 		case '_':
1334 			if ((strncmp(arg, nameflag, strlen(nameflag)) == 0) ||
1335 			    (strncmp(arg, "-_cc=", 5) == 0) ||
1336 			    (strncmp(arg, "-_sun=", 6) == 0)) {
1337 				newae(ctx->i_ae, strchr(arg, '=') + 1);
1338 			}
1339 			break;
1340 
1341 		case 'V':
1342 			ctx->i_flags &= ~CW_F_ECHO;
1343 			newae(ctx->i_ae, arg);
1344 			break;
1345 		case 'o':
1346 			seen_o = 1;
1347 			if (strlen(arg) == 2) {
1348 				in_output = 1;
1349 				newae(ctx->i_ae, arg);
1350 			} else if (ctx->i_flags & CW_F_SHADOW) {
1351 				newae(ctx->i_ae, "-o");
1352 				newae(ctx->i_ae, discard_file_name(ctx, arg));
1353 			} else {
1354 				newae(ctx->i_ae, arg);
1355 			}
1356 			break;
1357 		case 'c':
1358 		case 'S':
1359 			if (strlen(arg) == 2)
1360 				op = CW_O_COMPILE;
1361 			newae(ctx->i_ae, arg);
1362 			break;
1363 		case 'E':
1364 		case 'P':
1365 			if (strlen(arg) == 2)
1366 				op = CW_O_PREPROCESS;
1367 		/*FALLTHROUGH*/
1368 		default:
1369 			newae(ctx->i_ae, arg);
1370 		}
1371 	}
1372 
1373 	free(nameflag);
1374 
1375 	/* See the comment on this same code in do_gcc() */
1376 	if (c_files > 1 && op != CW_O_PREPROCESS) {
1377 		errx(2, "multiple source files are "
1378 		    "allowed only with -E or -P");
1379 	}
1380 
1381 	if (ctx->i_flags & CW_F_SHADOW) {
1382 		if (op == CW_O_PREPROCESS)
1383 			exit(0);
1384 		else if (op == CW_O_LINK && c_files == 0)
1385 			exit(0);
1386 	}
1387 
1388 	if (!seen_o && (ctx->i_flags & CW_F_SHADOW)) {
1389 		newae(ctx->i_ae, "-o");
1390 		newae(ctx->i_ae, discard_file_name(ctx, NULL));
1391 	}
1392 }
1393 
1394 static void
prepctx(cw_ictx_t * ctx)1395 prepctx(cw_ictx_t *ctx)
1396 {
1397 	newae(ctx->i_ae, ctx->i_compiler->c_path);
1398 
1399 	if (ctx->i_flags & CW_F_PROG) {
1400 		(void) printf("%s: %s\n", (ctx->i_flags & CW_F_SHADOW) ?
1401 		    "shadow" : "primary", ctx->i_compiler->c_path);
1402 		(void) fflush(stdout);
1403 	}
1404 
1405 	/*
1406 	 * If LD_ALTEXEC is already set, the expectation would be that that
1407 	 * link-editor is run, as such we need to leave it the environment
1408 	 * alone and let that happen.
1409 	 */
1410 	if ((ctx->i_linker != NULL) && (getenv("LD_ALTEXEC") == NULL))
1411 		setenv("LD_ALTEXEC", ctx->i_linker, 1);
1412 
1413 	if (!(ctx->i_flags & CW_F_XLATE))
1414 		return;
1415 
1416 	switch (ctx->i_compiler->c_style) {
1417 	case SUN:
1418 		do_cc(ctx);
1419 		break;
1420 	case GNU:
1421 		do_gcc(ctx);
1422 		break;
1423 	case SMATCH:
1424 		do_smatch(ctx);
1425 		break;
1426 	}
1427 }
1428 
1429 static int
invoke(cw_ictx_t * ctx)1430 invoke(cw_ictx_t *ctx)
1431 {
1432 	char **newargv, *makeflags;
1433 	int ac;
1434 	struct ae *a;
1435 
1436 	newargv = calloc(ctx->i_ae->ael_argc + 1, sizeof (*newargv));
1437 	if (newargv == NULL)
1438 		nomem();
1439 
1440 	/*
1441 	 * Check to see if the silent make flag is present (-s), if so, do not
1442 	 * echo. The MAKEFLAGS environment variable is set by dmake. By
1443 	 * observation it appears to place short flags without any arguments
1444 	 * first followed by any long form flags or flags with arguments.
1445 	 */
1446 	makeflags = getenv("MAKEFLAGS");
1447 	if (makeflags != NULL) {
1448 		size_t makeflags_len = strlen(makeflags);
1449 		for (size_t i = 0; i < makeflags_len; i++) {
1450 			if (makeflags[i] == 's') {
1451 				ctx->i_flags &= ~CW_F_ECHO;
1452 				break;
1453 			}
1454 			/* end of short flags */
1455 			if (makeflags[i] == ' ')
1456 				break;
1457 		}
1458 	}
1459 
1460 	if (ctx->i_flags & CW_F_ECHO)
1461 		(void) fprintf(stderr, "+ ");
1462 
1463 	for (ac = 0, a = ctx->i_ae->ael_head; a; a = a->ae_next, ac++) {
1464 		newargv[ac] = a->ae_arg;
1465 		if (ctx->i_flags & CW_F_ECHO)
1466 			(void) fprintf(stderr, "%s ", a->ae_arg);
1467 		if (a == ctx->i_ae->ael_tail)
1468 			break;
1469 	}
1470 
1471 	if (ctx->i_flags & CW_F_ECHO) {
1472 		(void) fprintf(stderr, "\n");
1473 		(void) fflush(stderr);
1474 	}
1475 
1476 	if (!(ctx->i_flags & CW_F_EXEC))
1477 		return (0);
1478 
1479 	/*
1480 	 * We must fix up the environment here so that the dependency files are
1481 	 * not trampled by the shadow compiler. Also take care of GCC
1482 	 * environment variables that will throw off gcc. This assumes a primary
1483 	 * gcc.
1484 	 */
1485 	if ((ctx->i_flags & CW_F_SHADOW) &&
1486 	    (unsetenv("SUNPRO_DEPENDENCIES") != 0 ||
1487 	    unsetenv("DEPENDENCIES_OUTPUT") != 0 ||
1488 	    unsetenv("GCC_ROOT") != 0)) {
1489 		(void) fprintf(stderr, "error: environment setup failed: %s\n",
1490 		    strerror(errno));
1491 		return (-1);
1492 	}
1493 
1494 	(void) execv(newargv[0], newargv);
1495 	warn("couldn't run %s", newargv[0]);
1496 
1497 	return (-1);
1498 }
1499 
1500 static int
reap(cw_ictx_t * ctx)1501 reap(cw_ictx_t *ctx)
1502 {
1503 	int status, ret = 0;
1504 	char buf[1024];
1505 	struct stat s;
1506 
1507 	/*
1508 	 * Only wait for one specific child.
1509 	 */
1510 	if (ctx->i_pid <= 0)
1511 		return (-1);
1512 
1513 	do {
1514 		if (waitpid(ctx->i_pid, &status, 0) < 0) {
1515 			warn("cannot reap child");
1516 			return (-1);
1517 		}
1518 		if (status != 0) {
1519 			if (WIFSIGNALED(status)) {
1520 				ret = -WTERMSIG(status);
1521 				break;
1522 			} else if (WIFEXITED(status)) {
1523 				ret = WEXITSTATUS(status);
1524 				break;
1525 			}
1526 		}
1527 	} while (!WIFEXITED(status) && !WIFSIGNALED(status));
1528 
1529 	if (stat(ctx->i_stderr, &s) < 0) {
1530 		warn("stat failed on child cleanup");
1531 		return (-1);
1532 	}
1533 	if (s.st_size != 0) {
1534 		FILE *f;
1535 
1536 		if ((f = fopen(ctx->i_stderr, "r")) != NULL) {
1537 			while (fgets(buf, sizeof (buf), f))
1538 				(void) fprintf(stderr, "%s", buf);
1539 			(void) fflush(stderr);
1540 			(void) fclose(f);
1541 		}
1542 	}
1543 	(void) unlink(ctx->i_stderr);
1544 	free(ctx->i_stderr);
1545 
1546 	/*
1547 	 * cc returns an error code when given -V; we want that to succeed.
1548 	 */
1549 	if (ctx->i_flags & CW_F_PROG)
1550 		return (0);
1551 
1552 	return (ret);
1553 }
1554 
1555 static int
exec_ctx(cw_ictx_t * ctx,int block)1556 exec_ctx(cw_ictx_t *ctx, int block)
1557 {
1558 	if ((ctx->i_stderr = tempnam(ctx->i_tmpdir, "cw")) == NULL) {
1559 		nomem();
1560 		return (-1);
1561 	}
1562 
1563 	if ((ctx->i_pid = fork()) == 0) {
1564 		int fd;
1565 
1566 		(void) fclose(stderr);
1567 		if ((fd = open(ctx->i_stderr, O_WRONLY | O_CREAT | O_EXCL,
1568 		    0666)) < 0) {
1569 			err(1, "open failed for standard error");
1570 		}
1571 		if (dup2(fd, 2) < 0) {
1572 			err(1, "dup2 failed for standard error");
1573 		}
1574 		if (fd != 2)
1575 			(void) close(fd);
1576 		if (freopen("/dev/fd/2", "w", stderr) == NULL) {
1577 			err(1, "freopen failed for /dev/fd/2");
1578 		}
1579 
1580 		prepctx(ctx);
1581 		exit(invoke(ctx));
1582 	}
1583 
1584 	if (ctx->i_pid < 0) {
1585 		err(1, "fork failed");
1586 	}
1587 
1588 	if (block)
1589 		return (reap(ctx));
1590 
1591 	return (0);
1592 }
1593 
1594 static void
parse_compiler(const char * spec,cw_compiler_t * compiler)1595 parse_compiler(const char *spec, cw_compiler_t *compiler)
1596 {
1597 	char *tspec, *token;
1598 
1599 	if ((tspec = strdup(spec)) == NULL)
1600 		nomem();
1601 
1602 	if ((token = strsep(&tspec, ",")) == NULL)
1603 		errx(1, "Compiler is missing a name: %s", spec);
1604 	compiler->c_name = token;
1605 
1606 	if ((token = strsep(&tspec, ",")) == NULL)
1607 		errx(1, "Compiler is missing a path: %s", spec);
1608 	compiler->c_path = token;
1609 
1610 	if ((token = strsep(&tspec, ",")) == NULL)
1611 		errx(1, "Compiler is missing a style: %s", spec);
1612 
1613 	if ((strcasecmp(token, "gnu") == 0) ||
1614 	    (strcasecmp(token, "gcc") == 0)) {
1615 		compiler->c_style = GNU;
1616 	} else if ((strcasecmp(token, "sun") == 0) ||
1617 	    (strcasecmp(token, "cc") == 0)) {
1618 		compiler->c_style = SUN;
1619 	} else if ((strcasecmp(token, "smatch") == 0)) {
1620 		compiler->c_style = SMATCH;
1621 	} else {
1622 		errx(1, "unknown compiler style: %s", token);
1623 	}
1624 
1625 	if (tspec != NULL)
1626 		errx(1, "Excess tokens in compiler: %s", spec);
1627 }
1628 
1629 static void
cleanup(cw_ictx_t * ctx)1630 cleanup(cw_ictx_t *ctx)
1631 {
1632 	DIR *dirp;
1633 	struct dirent *dp;
1634 	char buf[MAXPATHLEN];
1635 
1636 	if ((dirp = opendir(ctx->i_tmpdir)) == NULL) {
1637 		if (errno != ENOENT) {
1638 			err(1, "couldn't open temp directory: %s",
1639 			    ctx->i_tmpdir);
1640 		} else {
1641 			return;
1642 		}
1643 	}
1644 
1645 	errno = 0;
1646 	while ((dp = readdir(dirp)) != NULL) {
1647 		(void) snprintf(buf, MAXPATHLEN, "%s/%s", ctx->i_tmpdir,
1648 		    dp->d_name);
1649 
1650 		if (strcmp(dp->d_name, ".") == 0 ||
1651 		    strcmp(dp->d_name, "..") == 0) {
1652 			continue;
1653 		}
1654 
1655 		if (unlink(buf) == -1)
1656 			err(1, "failed to unlink temp file: %s", dp->d_name);
1657 		errno = 0;
1658 	}
1659 
1660 	if (errno != 0) {
1661 		err(1, "failed to read temporary directory: %s",
1662 		    ctx->i_tmpdir);
1663 	}
1664 
1665 	(void) closedir(dirp);
1666 	if (rmdir(ctx->i_tmpdir) != 0) {
1667 		err(1, "failed to unlink temporary directory: %s",
1668 		    ctx->i_tmpdir);
1669 	}
1670 }
1671 
1672 int
main(int argc,char ** argv)1673 main(int argc, char **argv)
1674 {
1675 	int ch;
1676 	cw_compiler_t primary = { NULL, NULL, 0 };
1677 	cw_compiler_t shadows[10];
1678 	int nshadows = 0;
1679 	int ret = 0;
1680 	bool do_serial;
1681 	bool do_exec;
1682 	bool vflg = false;
1683 	bool Cflg = false;
1684 	bool cflg = false;
1685 	bool nflg = false;
1686 	char *tmpdir;
1687 
1688 	cw_ictx_t *main_ctx;
1689 
1690 	static struct option longopts[] = {
1691 		{ "compiler", no_argument, NULL, 'c' },
1692 		{ "linker", required_argument, NULL, 'l' },
1693 		{ "noecho", no_argument, NULL, 'n' },
1694 		{ "primary", required_argument, NULL, 'p' },
1695 		{ "shadow", required_argument, NULL, 's' },
1696 		{ "versions", no_argument, NULL, 'v' },
1697 		{ NULL, 0, NULL, 0 },
1698 	};
1699 
1700 
1701 	if ((main_ctx = newictx()) == NULL)
1702 		nomem();
1703 
1704 	while ((ch = getopt_long(argc, argv, "C", longopts, NULL)) != -1) {
1705 		switch (ch) {
1706 		case 'c':
1707 			cflg = true;
1708 			break;
1709 		case 'C':
1710 			Cflg = true;
1711 			break;
1712 		case 'l':
1713 			if ((main_ctx->i_linker = strdup(optarg)) == NULL)
1714 				nomem();
1715 			break;
1716 		case 'n':
1717 			nflg = true;
1718 			break;
1719 		case 'p':
1720 			if (primary.c_path != NULL) {
1721 				warnx("Only one primary compiler may "
1722 				    "be specified");
1723 				usage();
1724 			}
1725 
1726 			parse_compiler(optarg, &primary);
1727 			break;
1728 		case 's':
1729 			if (nshadows >= 10)
1730 				errx(1, "May only use 10 shadows at "
1731 				    "the moment");
1732 			parse_compiler(optarg, &shadows[nshadows]);
1733 			nshadows++;
1734 			break;
1735 		case 'v':
1736 			vflg = true;
1737 			break;
1738 		default:
1739 			(void) fprintf(stderr, "Did you forget '--'?\n");
1740 			usage();
1741 		}
1742 	}
1743 
1744 	if (primary.c_path == NULL) {
1745 		warnx("A primary compiler must be specified");
1746 		usage();
1747 	}
1748 
1749 	do_serial = getenv("CW_SHADOW_SERIAL") != NULL;
1750 	do_exec = getenv("CW_NO_EXEC") == NULL;
1751 
1752 	/* Leave room for argv[0] */
1753 	argc -= (optind - 1);
1754 	argv += (optind - 1);
1755 
1756 	main_ctx->i_oldargc = argc;
1757 	main_ctx->i_oldargv = argv;
1758 	main_ctx->i_flags = CW_F_XLATE;
1759 	if (nflg == 0)
1760 		main_ctx->i_flags |= CW_F_ECHO;
1761 	if (do_exec)
1762 		main_ctx->i_flags |= CW_F_EXEC;
1763 	if (Cflg)
1764 		main_ctx->i_flags |= CW_F_CXX;
1765 	main_ctx->i_compiler = &primary;
1766 
1767 	if (cflg) {
1768 		(void) fputs(primary.c_path, stdout);
1769 	}
1770 
1771 	if (vflg) {
1772 		(void) printf("cw version %s\n", CW_VERSION);
1773 		(void) fflush(stdout);
1774 		main_ctx->i_flags &= ~CW_F_ECHO;
1775 		main_ctx->i_flags |= CW_F_PROG | CW_F_EXEC;
1776 		do_serial = 1;
1777 	}
1778 
1779 	tmpdir = getenv("TMPDIR");
1780 	if (tmpdir == NULL)
1781 		tmpdir = "/tmp";
1782 
1783 	if (asprintf(&main_ctx->i_tmpdir, "%s/cw.XXXXXX", tmpdir) == -1)
1784 		nomem();
1785 
1786 	if ((main_ctx->i_tmpdir = mkdtemp(main_ctx->i_tmpdir)) == NULL)
1787 		errx(1, "failed to create temporary directory");
1788 
1789 	ret |= exec_ctx(main_ctx, do_serial);
1790 
1791 	for (int i = 0; i < nshadows; i++) {
1792 		int r;
1793 		cw_ictx_t *shadow_ctx;
1794 
1795 		if ((shadow_ctx = newictx()) == NULL)
1796 			nomem();
1797 
1798 		(void) memcpy(shadow_ctx, main_ctx, sizeof (cw_ictx_t));
1799 
1800 		shadow_ctx->i_flags |= CW_F_SHADOW;
1801 		shadow_ctx->i_compiler = &shadows[i];
1802 
1803 		r = exec_ctx(shadow_ctx, do_serial);
1804 		if (r == 0) {
1805 			shadow_ctx->i_next = main_ctx->i_next;
1806 			main_ctx->i_next = shadow_ctx;
1807 		}
1808 		ret |= r;
1809 	}
1810 
1811 	if (!do_serial) {
1812 		cw_ictx_t *next = main_ctx;
1813 		while (next != NULL) {
1814 			cw_ictx_t *toreap = next;
1815 			next = next->i_next;
1816 			ret |= reap(toreap);
1817 		}
1818 	}
1819 
1820 	cleanup(main_ctx);
1821 	return (ret);
1822 }
1823