xref: /illumos-gate/usr/src/tools/cw/cw.c (revision 67deef8c)
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 
31 /*
32  * Wrapper for the GNU C compiler to make it accept the Sun C compiler
33  * arguments where possible.
34  *
35  * Since the translation is inexact, this is something of a work-in-progress.
36  *
37  */
38 
39 /* If you modify this file, you must increment CW_VERSION */
40 #define	CW_VERSION	"3.0"
41 
42 /*
43  * -#		Verbose mode
44  * -###		Show compiler commands built by driver, no compilation
45  * -A<name[(tokens)]>	Preprocessor predicate assertion
46  * -B<[static|dynamic]>	Specify dynamic or static binding
47  * -C		Prevent preprocessor from removing comments
48  * -c		Compile only - produce .o files, suppress linking
49  * -cg92	Alias for -xtarget=ss1000
50  * -D<name[=token]>	Associate name with token as if by #define
51  * -d[y|n]	dynamic [-dy] or static [-dn] option to linker
52  * -E		Compile source through preprocessor only, output to stdout
53  * -erroff=<t>	Suppress warnings specified by tags t(%none, %all, <tag list>)
54  * -errtags=<a>	Display messages with tags a(no, yes)
55  * -errwarn=<t>	Treats warnings specified by tags t(%none, %all, <tag list>)
56  *		as errors
57  * -fast	Optimize using a selection of options
58  * -fd		Report old-style function definitions and declarations
59  * -fnonstd	Initialize floating-point hardware to non-standard preferences
60  * -fns[=<yes|no>] Select non-standard floating point mode
61  * -fprecision=<p> Set FP rounding precision mode p(single, double, extended)
62  * -fround=<r>	Select the IEEE rounding mode in effect at startup
63  * -fsimple[=<n>] Select floating-point optimization preferences <n>
64  * -fsingle	Use single-precision arithmetic (-Xt and -Xs modes only)
65  * -ftrap=<t>	Select floating-point trapping mode in effect at startup
66  * -fstore	force floating pt. values to target precision on assignment
67  * -G		Build a dynamic shared library
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  * -dy or -dn			-Wl,-dy or -Wl,-dn
160  * -E				pass-thru
161  * -erroff=E_EMPTY_TRANSLATION_UNIT ignore
162  * -errtags=%all		-Wall
163  * -errwarn=%all		-Werror else -Wno-error
164  * -fast			error
165  * -fd				error
166  * -fnonstd			error
167  * -fns[=<yes|no>]		error
168  * -fprecision=<p>		error
169  * -fround=<r>			error
170  * -fsimple[=<n>]		error
171  * -fsingle[=<n>]		error
172  * -ftrap=<t>			error
173  * -fstore			error
174  * -G				pass-thru
175  * -g				pass-thru
176  * -H				pass-thru
177  * -h <name>			pass-thru
178  * -I<dir>			pass-thru
179  * -i				pass-thru
180  * -keeptmp			-save-temps
181  * -L<dir>			pass-thru
182  * -l<name>			pass-thru
183  * -mc				error
184  * -mr				error
185  * -mr,"string"			error
186  * -mt				-D_REENTRANT
187  * -native			error
188  * -nofstore			error
189  * -nolib			-nodefaultlibs
190  * -norunpath			ignore
191  * -O				-O1 (Check the man page to be certain)
192  * -o <outputfile>		pass-thru
193  * -P				-E -o filename.i (or error)
194  * -p				pass-thru
195  * -Q[y|n]			error
196  * -R<dir[:dir]>		pass-thru
197  * -S				pass-thru
198  * -s				-Wl,-s
199  * -t				-Wl,-t
200  * -U<name>			pass-thru
201  * -V				--version
202  * -v				-Wall
203  * -Wa,<arg>			pass-thru
204  * -Wp,<arg>			pass-thru except -xc99=<a>
205  * -Wl,<arg>			pass-thru
206  * -W{m,0,2,h,i,u>		error/ignore
207  * -xmodel=kernel		-ffreestanding -mcmodel=kernel -mno-red-zone
208  * -Wu,-save_args		-msave-args
209  * -w				pass-thru
210  * -Xa				-std=iso9899:199409 or -ansi
211  * -Xt				error
212  * -Xs				-traditional -std=c89
213  * -xarch=<a>			table
214  * -xbuiltin[=<b>]		-fbuiltin (-fno-builtin otherwise)
215  * -xCC				ignore
216  * -xchip=<c>			table
217  * -xcode=<c>			table
218  * -xdebugformat=<format>	ignore (always use dwarf-2 for gcc)
219  * -xcrossfile[=<n>]		ignore
220  * -xe				error
221  * -xF				error
222  * -xhelp=<f>			error
223  * -xildoff			ignore
224  * -xildon			ignore
225  * -xinline			ignore
226  * -xlibmieee			error
227  * -xlibmil			error
228  * -xlic_lib=sunperf		error
229  * -xmaxopt=[...]		error
230  * -xO<n>			-O<n>
231  * -xP				error
232  * -xprofile=<p>		error
233  * -xregs=<r>			table
234  * -xs				error
235  * -xsb				error
236  * -xsbfast			error
237  * -xsfpconst			error
238  * -xspace			ignore (-not -Os)
239  * -xstrconst			ignore
240  * -xtarget=<t>			table
241  * -xtemp=<dir>			error
242  * -xtime			error
243  * -xtransition			-Wtransition
244  * -xunroll=n			error
245  * -W0,-xdbggen=no%usedonly	-fno-eliminate-unused-debug-symbols
246  *				-fno-eliminate-unused-debug-types
247  * -Y<c>,<dir>			error
248  * -YA,<dir>			error
249  * -YI,<dir>			-nostdinc -I<dir>
250  * -YP,<dir>			error
251  * -YS,<dir>			error
252  */
253 
254 #include <ctype.h>
255 #include <err.h>
256 #include <errno.h>
257 #include <fcntl.h>
258 #include <getopt.h>
259 #include <stdio.h>
260 #include <stdlib.h>
261 #include <string.h>
262 #include <unistd.h>
263 
264 #include <sys/param.h>
265 #include <sys/stat.h>
266 #include <sys/types.h>
267 #include <sys/utsname.h>
268 #include <sys/wait.h>
269 
270 #define	CW_F_CXX	0x01
271 #define	CW_F_SHADOW	0x02
272 #define	CW_F_EXEC	0x04
273 #define	CW_F_ECHO	0x08
274 #define	CW_F_XLATE	0x10
275 #define	CW_F_PROG	0x20
276 
277 typedef enum cw_op {
278 	CW_O_NONE = 0,
279 	CW_O_PREPROCESS,
280 	CW_O_COMPILE,
281 	CW_O_LINK
282 } cw_op_t;
283 
284 struct aelist {
285 	struct ae {
286 		struct ae *ae_next;
287 		char *ae_arg;
288 	} *ael_head, *ael_tail;
289 	int ael_argc;
290 };
291 
292 typedef enum {
293 	GNU,
294 	SUN
295 } compiler_style_t;
296 
297 typedef struct {
298 	char *c_name;
299 	char *c_path;
300 	compiler_style_t c_style;
301 } cw_compiler_t;
302 
303 typedef struct cw_ictx {
304 	struct cw_ictx	*i_next;
305 	cw_compiler_t	*i_compiler;
306 	struct aelist	*i_ae;
307 	uint32_t	i_flags;
308 	int		i_oldargc;
309 	char		**i_oldargv;
310 	pid_t		i_pid;
311 	char		i_discard[MAXPATHLEN];
312 	char		*i_stderr;
313 } cw_ictx_t;
314 
315 /*
316  * Status values to indicate which Studio compiler and associated
317  * flags are being used.
318  */
319 #define	M32		0x01	/* -m32 - only on Studio 12 */
320 #define	M64		0x02	/* -m64 - only on Studio 12 */
321 #define	SS11		0x100	/* Studio 11 */
322 #define	SS12		0x200	/* Studio 12 */
323 
324 #define	TRANS_ENTRY	5
325 /*
326  * Translation table definition for the -xarch= flag. The "x_arg"
327  * value is translated into the appropriate gcc flags according
328  * to the values in x_trans[n]. The x_flags indicates what compiler
329  * is being used and what flags have been set via the use of
330  * "x_arg".
331  */
332 typedef struct xarch_table {
333 	char	*x_arg;
334 	int	x_flags;
335 	char	*x_trans[TRANS_ENTRY];
336 } xarch_table_t;
337 
338 /*
339  * The translation table for the -xarch= flag used in the Studio compilers.
340  */
341 static const xarch_table_t xtbl[] = {
342 #if defined(__x86)
343 	{ "generic",	SS11, {NULL} },
344 	{ "generic64",	(SS11|M64), { "-m64", "-mtune=opteron" } },
345 	{ "amd64",	(SS11|M64), { "-m64", "-mtune=opteron" } },
346 	{ "386",	SS11,	{ "-march=i386" } },
347 	{ "pentium_pro", SS11,	{ "-march=pentiumpro" } },
348 	{ "sse",	SS11, { "-msse", "-mfpmath=sse" } },
349 	{ "sse2",	SS11, { "-msse2", "-mfpmath=sse" } },
350 #elif defined(__sparc)
351 	{ "generic",	(SS11|M32), { "-m32", "-mcpu=v8" } },
352 	{ "generic64",	(SS11|M64), { "-m64", "-mcpu=v9" } },
353 	{ "v8",		(SS11|M32), { "-m32", "-mcpu=v8", "-mno-v8plus" } },
354 	{ "v8plus",	(SS11|M32), { "-m32", "-mcpu=v9", "-mv8plus" } },
355 	{ "v8plusa",	(SS11|M32), { "-m32", "-mcpu=ultrasparc", "-mv8plus",
356 			"-mvis" } },
357 	{ "v8plusb",	(SS11|M32), { "-m32", "-mcpu=ultrasparc3", "-mv8plus",
358 			"-mvis" } },
359 	{ "v9",		(SS11|M64), { "-m64", "-mcpu=v9" } },
360 	{ "v9a",	(SS11|M64), { "-m64", "-mcpu=ultrasparc", "-mvis" } },
361 	{ "v9b",	(SS11|M64), { "-m64", "-mcpu=ultrasparc3", "-mvis" } },
362 	{ "sparc",	SS12, { "-mcpu=v9", "-mv8plus" } },
363 	{ "sparcvis",	SS12, { "-mcpu=ultrasparc", "-mvis" } },
364 	{ "sparcvis2",	SS12, { "-mcpu=ultrasparc3", "-mvis" } }
365 #endif
366 };
367 
368 static int xtbl_size = sizeof (xtbl) / sizeof (xarch_table_t);
369 
370 static const char *xchip_tbl[] = {
371 #if defined(__x86)
372 	"386",		"-mtune=i386", NULL,
373 	"486",		"-mtune=i486", NULL,
374 	"pentium",	"-mtune=pentium", NULL,
375 	"pentium_pro",  "-mtune=pentiumpro", NULL,
376 #elif defined(__sparc)
377 	"super",	"-mtune=supersparc", NULL,
378 	"ultra",	"-mtune=ultrasparc", NULL,
379 	"ultra3",	"-mtune=ultrasparc3", NULL,
380 #endif
381 	NULL,		NULL
382 };
383 
384 static const char *xcode_tbl[] = {
385 #if defined(__sparc)
386 	"abs32",	"-fno-pic", "-mcmodel=medlow", NULL,
387 	"abs44",	"-fno-pic", "-mcmodel=medmid", NULL,
388 	"abs64",	"-fno-pic", "-mcmodel=medany", NULL,
389 	"pic13",	"-fpic", NULL,
390 	"pic32",	"-fPIC", NULL,
391 #endif
392 	NULL,		NULL
393 };
394 
395 static const char *xtarget_tbl[] = {
396 #if defined(__x86)
397 	"pentium_pro",	"-march=pentiumpro", NULL,
398 #endif	/* __x86 */
399 	NULL,		NULL
400 };
401 
402 static const char *xregs_tbl[] = {
403 #if defined(__sparc)
404 	"appl",		"-mapp-regs", NULL,
405 	"no%appl",	"-mno-app-regs", NULL,
406 	"float",	"-mfpu", NULL,
407 	"no%float",	"-mno-fpu", NULL,
408 #endif	/* __sparc */
409 	NULL,		NULL
410 };
411 
412 static void
413 nomem(void)
414 {
415 	errx(1, "out of memory");
416 }
417 
418 static void
419 newae(struct aelist *ael, const char *arg)
420 {
421 	struct ae *ae;
422 
423 	if ((ae = calloc(sizeof (*ae), 1)) == NULL)
424 		nomem();
425 	ae->ae_arg = strdup(arg);
426 	if (ael->ael_tail == NULL)
427 		ael->ael_head = ae;
428 	else
429 		ael->ael_tail->ae_next = ae;
430 	ael->ael_tail = ae;
431 	ael->ael_argc++;
432 }
433 
434 static cw_ictx_t *
435 newictx(void)
436 {
437 	cw_ictx_t *ctx = calloc(sizeof (cw_ictx_t), 1);
438 	if (ctx)
439 		if ((ctx->i_ae = calloc(sizeof (struct aelist), 1)) == NULL) {
440 			free(ctx);
441 			return (NULL);
442 		}
443 
444 	return (ctx);
445 }
446 
447 static void
448 error(const char *arg)
449 {
450 	errx(2, "error: mapping failed at or near arg '%s'", arg);
451 }
452 
453 /*
454  * Add the current favourite set of warnings to the gcc invocation.
455  */
456 static void
457 warnings(struct aelist *h)
458 {
459 	static int warningsonce;
460 
461 	if (warningsonce++)
462 		return;
463 
464 	/*
465 	 * Enable as many warnings as exist, then disable those that we never
466 	 * ever want.
467 	 */
468 	newae(h, "-Wall");
469 	newae(h, "-Wextra");
470 }
471 
472 static void
473 optim_disable(struct aelist *h, int level)
474 {
475 	if (level >= 2) {
476 		newae(h, "-fno-strict-aliasing");
477 		newae(h, "-fno-unit-at-a-time");
478 		newae(h, "-fno-optimize-sibling-calls");
479 	}
480 }
481 
482 static void
483 Xsmode(struct aelist *h)
484 {
485 	static int xsonce;
486 
487 	if (xsonce++)
488 		return;
489 
490 	newae(h, "-traditional");
491 	newae(h, "-traditional-cpp");
492 }
493 
494 static void
495 usage()
496 {
497 	extern char *__progname;
498 	(void) fprintf(stderr,
499 	    "usage: %s [-C] [--versions] --primary <compiler> "
500 	    "[--shadow <compiler>]... -- cflags...\n",
501 	    __progname);
502 	(void) fprintf(stderr, "compilers take the form: name,path,style\n"
503 	    " - name: a unique name usable in flag specifiers\n"
504 	    " - path: path to the compiler binary\n"
505 	    " - style: the style of flags expected: either sun or gnu\n");
506 	exit(2);
507 }
508 
509 static int
510 xlate_xtb(struct aelist *h, const char *xarg)
511 {
512 	int	i, j;
513 
514 	for (i = 0; i < xtbl_size; i++) {
515 		if (strcmp(xtbl[i].x_arg, xarg) == 0)
516 			break;
517 	}
518 
519 	/*
520 	 * At the end of the table and so no matching "arg" entry
521 	 * found and so this must be a bad -xarch= flag.
522 	 */
523 	if (i == xtbl_size)
524 		error(xarg);
525 
526 	for (j = 0; j < TRANS_ENTRY; j++) {
527 		if (xtbl[i].x_trans[j] != NULL)
528 			newae(h, xtbl[i].x_trans[j]);
529 		else
530 			break;
531 	}
532 	return (xtbl[i].x_flags);
533 
534 }
535 
536 static void
537 xlate(struct aelist *h, const char *xarg, const char **table)
538 {
539 	while (*table != NULL && strcmp(xarg, *table) != 0) {
540 		while (*table != NULL)
541 			table++;
542 		table++;
543 	}
544 
545 	if (*table == NULL)
546 		error(xarg);
547 
548 	table++;
549 
550 	while (*table != NULL) {
551 		newae(h, *table);
552 		table++;
553 	}
554 }
555 
556 static void
557 do_gcc(cw_ictx_t *ctx)
558 {
559 	int c;
560 	int nolibc = 0;
561 	int in_output = 0, seen_o = 0, c_files = 0;
562 	cw_op_t op = CW_O_LINK;
563 	char *model = NULL;
564 	char *nameflag;
565 	int	mflag = 0;
566 
567 	if (ctx->i_flags & CW_F_PROG) {
568 		newae(ctx->i_ae, "--version");
569 		return;
570 	}
571 
572 	newae(ctx->i_ae, "-fident");
573 	newae(ctx->i_ae, "-finline");
574 	newae(ctx->i_ae, "-fno-inline-functions");
575 	newae(ctx->i_ae, "-fno-builtin");
576 	newae(ctx->i_ae, "-fno-asm");
577 	newae(ctx->i_ae, "-fdiagnostics-show-option");
578 	newae(ctx->i_ae, "-nodefaultlibs");
579 
580 #if defined(__sparc)
581 	/*
582 	 * The SPARC ldd and std instructions require 8-byte alignment of
583 	 * their address operand.  gcc correctly uses them only when the
584 	 * ABI requires 8-byte alignment; unfortunately we have a number of
585 	 * pieces of buggy code that doesn't conform to the ABI.  This
586 	 * flag makes gcc work more like Studio with -xmemalign=4.
587 	 */
588 	newae(ctx->i_ae, "-mno-integer-ldd-std");
589 #endif
590 
591 	/*
592 	 * This is needed because 'u' is defined
593 	 * under a conditional on 'sun'.  Should
594 	 * probably just remove the conditional,
595 	 * or make it be dependent on '__sun'.
596 	 *
597 	 * -Dunix is also missing in enhanced ANSI mode
598 	 */
599 	newae(ctx->i_ae, "-D__sun");
600 
601 	if (asprintf(&nameflag, "-_%s=", ctx->i_compiler->c_name) == -1)
602 		nomem();
603 
604 	/*
605 	 * Walk the argument list, translating as we go ..
606 	 */
607 	while (--ctx->i_oldargc > 0) {
608 		char *arg = *++ctx->i_oldargv;
609 		size_t arglen = strlen(arg);
610 
611 		if (*arg == '-') {
612 			arglen--;
613 		} else {
614 			/*
615 			 * Discard inline files that gcc doesn't grok
616 			 */
617 			if (!in_output && arglen > 3 &&
618 			    strcmp(arg + arglen - 3, ".il") == 0)
619 				continue;
620 
621 			if (!in_output && arglen > 2 &&
622 			    arg[arglen - 2] == '.' &&
623 			    (arg[arglen - 1] == 'S' || arg[arglen - 1] == 's' ||
624 			    arg[arglen - 1] == 'c' || arg[arglen - 1] == 'i'))
625 				c_files++;
626 
627 			/*
628 			 * Otherwise, filenames and partial arguments
629 			 * are passed through for gcc to chew on.  However,
630 			 * output is always discarded for the secondary
631 			 * compiler.
632 			 */
633 			if ((ctx->i_flags & CW_F_SHADOW) && in_output)
634 				newae(ctx->i_ae, ctx->i_discard);
635 			else
636 				newae(ctx->i_ae, arg);
637 			in_output = 0;
638 			continue;
639 		}
640 
641 		if (ctx->i_flags & CW_F_CXX) {
642 			if (strncmp(arg, "-_g++=", 6) == 0) {
643 				newae(ctx->i_ae, strchr(arg, '=') + 1);
644 				continue;
645 			}
646 			if (strncmp(arg, "-compat=", 8) == 0) {
647 				/* discard -compat=4 and -compat=5 */
648 				continue;
649 			}
650 			if (strcmp(arg, "-Qoption") == 0) {
651 				/* discard -Qoption and its two arguments */
652 				if (ctx->i_oldargc < 3)
653 					error(arg);
654 				ctx->i_oldargc -= 2;
655 				ctx->i_oldargv += 2;
656 				continue;
657 			}
658 			if (strcmp(arg, "-xwe") == 0) {
659 				/* turn warnings into errors */
660 				newae(ctx->i_ae, "-Werror");
661 				continue;
662 			}
663 			if (strcmp(arg, "-norunpath") == 0) {
664 				/* gcc has no corresponding option */
665 				continue;
666 			}
667 			if (strcmp(arg, "-nolib") == 0) {
668 				/* -nodefaultlibs is on by default */
669 				nolibc = 1;
670 				continue;
671 			}
672 #if defined(__sparc)
673 			if (strcmp(arg, "-cg92") == 0) {
674 				mflag |= xlate_xtb(ctx->i_ae, "v8");
675 				xlate(ctx->i_ae, "super", xchip_tbl);
676 				continue;
677 			}
678 #endif	/* __sparc */
679 		}
680 
681 		switch ((c = arg[1])) {
682 		case '_':
683 			if ((strncmp(arg, nameflag, strlen(nameflag)) == 0) ||
684 			    (strncmp(arg, "-_gcc=", 6) == 0) ||
685 			    (strncmp(arg, "-_gnu=", 6) == 0)) {
686 				newae(ctx->i_ae, strchr(arg, '=') + 1);
687 			}
688 			break;
689 		case '#':
690 			if (arglen == 1) {
691 				newae(ctx->i_ae, "-v");
692 				break;
693 			}
694 			error(arg);
695 			break;
696 		case 'f':
697 			if ((strcmp(arg, "-fpic") == 0) ||
698 			    (strcmp(arg, "-fPIC") == 0)) {
699 				newae(ctx->i_ae, arg);
700 				break;
701 			}
702 			error(arg);
703 			break;
704 		case 'g':
705 			newae(ctx->i_ae, "-gdwarf-2");
706 			break;
707 		case 'E':
708 			if (arglen == 1) {
709 				newae(ctx->i_ae, "-xc");
710 				newae(ctx->i_ae, arg);
711 				op = CW_O_PREPROCESS;
712 				nolibc = 1;
713 				break;
714 			}
715 			error(arg);
716 			break;
717 		case 'c':
718 		case 'S':
719 			if (arglen == 1) {
720 				op = CW_O_COMPILE;
721 				nolibc = 1;
722 			}
723 			/* FALLTHROUGH */
724 		case 'C':
725 		case 'H':
726 		case 'p':
727 			if (arglen == 1) {
728 				newae(ctx->i_ae, arg);
729 				break;
730 			}
731 			error(arg);
732 			break;
733 		case 'A':
734 		case 'h':
735 		case 'I':
736 		case 'i':
737 		case 'L':
738 		case 'l':
739 		case 'R':
740 		case 'U':
741 		case 'u':
742 		case 'w':
743 			newae(ctx->i_ae, arg);
744 			break;
745 		case 'o':
746 			seen_o = 1;
747 			if (arglen == 1) {
748 				in_output = 1;
749 				newae(ctx->i_ae, arg);
750 			} else if (ctx->i_flags & CW_F_SHADOW) {
751 				newae(ctx->i_ae, "-o");
752 				newae(ctx->i_ae, ctx->i_discard);
753 			} else {
754 				newae(ctx->i_ae, arg);
755 			}
756 			break;
757 		case 'D':
758 			newae(ctx->i_ae, arg);
759 			/*
760 			 * XXX	Clearly a hack ... do we need _KADB too?
761 			 */
762 			if (strcmp(arg, "-D_KERNEL") == 0 ||
763 			    strcmp(arg, "-D_BOOT") == 0)
764 				newae(ctx->i_ae, "-ffreestanding");
765 			break;
766 		case 'd':
767 			if (arglen == 2) {
768 				if (strcmp(arg, "-dy") == 0) {
769 					newae(ctx->i_ae, "-Wl,-dy");
770 					break;
771 				}
772 				if (strcmp(arg, "-dn") == 0) {
773 					newae(ctx->i_ae, "-Wl,-dn");
774 					break;
775 				}
776 			}
777 			if (strcmp(arg, "-dalign") == 0) {
778 				/*
779 				 * -dalign forces alignment in some cases;
780 				 * gcc does not need any flag to do this.
781 				 */
782 				break;
783 			}
784 			error(arg);
785 			break;
786 		case 'e':
787 			if (strcmp(arg,
788 			    "-erroff=E_EMPTY_TRANSLATION_UNIT") == 0) {
789 				/*
790 				 * Accept but ignore this -- gcc doesn't
791 				 * seem to complain about empty translation
792 				 * units
793 				 */
794 				break;
795 			}
796 			/* XX64 -- ignore all -erroff= options, for now */
797 			if (strncmp(arg, "-erroff=", 8) == 0)
798 				break;
799 			if (strcmp(arg, "-errtags=yes") == 0) {
800 				warnings(ctx->i_ae);
801 				break;
802 			}
803 			if (strcmp(arg, "-errwarn=%all") == 0) {
804 				newae(ctx->i_ae, "-Werror");
805 				break;
806 			}
807 			error(arg);
808 			break;
809 		case 'G':
810 			newae(ctx->i_ae, "-shared");
811 			nolibc = 1;
812 			break;
813 		case 'k':
814 			if (strcmp(arg, "-keeptmp") == 0) {
815 				newae(ctx->i_ae, "-save-temps");
816 				break;
817 			}
818 			error(arg);
819 			break;
820 		case 'm':
821 			if (strcmp(arg, "-mt") == 0) {
822 				newae(ctx->i_ae, "-D_REENTRANT");
823 				break;
824 			}
825 			if (strcmp(arg, "-m64") == 0) {
826 				newae(ctx->i_ae, "-m64");
827 #if defined(__x86)
828 				newae(ctx->i_ae, "-mtune=opteron");
829 #endif
830 				mflag |= M64;
831 				break;
832 			}
833 			if (strcmp(arg, "-m32") == 0) {
834 				newae(ctx->i_ae, "-m32");
835 				mflag |= M32;
836 				break;
837 			}
838 			error(arg);
839 			break;
840 		case 'B':	/* linker options */
841 		case 'M':
842 		case 'z':
843 			{
844 				char *opt;
845 				size_t len;
846 				char *s;
847 
848 				if (arglen == 1) {
849 					opt = *++ctx->i_oldargv;
850 					if (opt == NULL || *opt == '\0')
851 						error(arg);
852 					ctx->i_oldargc--;
853 				} else {
854 					opt = arg + 2;
855 				}
856 				len = strlen(opt) + 7;
857 				if ((s = malloc(len)) == NULL)
858 					nomem();
859 				(void) snprintf(s, len, "-Wl,-%c%s", c, opt);
860 				newae(ctx->i_ae, s);
861 				free(s);
862 			}
863 			break;
864 		case 'O':
865 			if (arglen == 1) {
866 				newae(ctx->i_ae, "-O");
867 				break;
868 			}
869 			error(arg);
870 			break;
871 		case 'P':
872 			/*
873 			 * We could do '-E -o filename.i', but that's hard,
874 			 * and we don't need it for the case that's triggering
875 			 * this addition.  We'll require the user to specify
876 			 * -o in the Makefile.  If they don't they'll find out
877 			 * in a hurry.
878 			 */
879 			newae(ctx->i_ae, "-E");
880 			op = CW_O_PREPROCESS;
881 			nolibc = 1;
882 			break;
883 		case 's':
884 			if (arglen == 1) {
885 				newae(ctx->i_ae, "-Wl,-s");
886 				break;
887 			}
888 			error(arg);
889 			break;
890 		case 't':
891 			if (arglen == 1) {
892 				newae(ctx->i_ae, "-Wl,-t");
893 				break;
894 			}
895 			error(arg);
896 			break;
897 		case 'V':
898 			if (arglen == 1) {
899 				ctx->i_flags &= ~CW_F_ECHO;
900 				newae(ctx->i_ae, "--version");
901 				break;
902 			}
903 			error(arg);
904 			break;
905 		case 'v':
906 			if (arglen == 1) {
907 				warnings(ctx->i_ae);
908 				break;
909 			}
910 			error(arg);
911 			break;
912 		case 'W':
913 			if (strncmp(arg, "-Wp,-xc99", 9) == 0) {
914 				/*
915 				 * gcc's preprocessor will accept c99
916 				 * regardless, so accept and ignore.
917 				 */
918 				break;
919 			}
920 			if (strncmp(arg, "-Wa,", 4) == 0 ||
921 			    strncmp(arg, "-Wp,", 4) == 0 ||
922 			    strncmp(arg, "-Wl,", 4) == 0) {
923 				newae(ctx->i_ae, arg);
924 				break;
925 			}
926 			if (strcmp(arg, "-W0,-noglobal") == 0 ||
927 			    strcmp(arg, "-W0,-xglobalstatic") == 0) {
928 				/*
929 				 * gcc doesn't prefix local symbols
930 				 * in debug mode, so this is not needed.
931 				 */
932 				break;
933 			}
934 			if (strcmp(arg, "-W0,-Lt") == 0) {
935 				/*
936 				 * Generate tests at the top of loops.
937 				 * There is no direct gcc equivalent, ignore.
938 				 */
939 				break;
940 			}
941 			if (strcmp(arg, "-W0,-xdbggen=no%usedonly") == 0) {
942 				newae(ctx->i_ae,
943 				    "-fno-eliminate-unused-debug-symbols");
944 				newae(ctx->i_ae,
945 				    "-fno-eliminate-unused-debug-types");
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 'd':
1048 				if (strncmp(arg, "-xdebugformat=", 14) == 0)
1049 					break;
1050 				error(arg);
1051 				break;
1052 			case 'F':
1053 				/*
1054 				 * Compile for mapfile reordering, or unused
1055 				 * section elimination, syntax can be -xF or
1056 				 * more complex, like -xF=%all -- ignore.
1057 				 */
1058 				if (strncmp(arg, "-xF", 3) == 0)
1059 					break;
1060 				error(arg);
1061 				break;
1062 			case 'i':
1063 				if (strncmp(arg, "-xinline", 8) == 0)
1064 					/* No inlining; ignore */
1065 					break;
1066 				if (strcmp(arg, "-xildon") == 0 ||
1067 				    strcmp(arg, "-xildoff") == 0)
1068 					/* No incremental linking; ignore */
1069 					break;
1070 				error(arg);
1071 				break;
1072 #if defined(__x86)
1073 			case 'm':
1074 				if (strcmp(arg, "-xmodel=kernel") == 0) {
1075 					newae(ctx->i_ae, "-ffreestanding");
1076 					newae(ctx->i_ae, "-mno-red-zone");
1077 					model = "-mcmodel=kernel";
1078 					nolibc = 1;
1079 					break;
1080 				}
1081 				error(arg);
1082 				break;
1083 #endif	/* __x86 */
1084 			case 'O':
1085 				if (strncmp(arg, "-xO", 3) == 0) {
1086 					size_t len = strlen(arg);
1087 					char *s = NULL;
1088 					int c = *(arg + 3);
1089 					int level;
1090 
1091 					if (len != 4 || !isdigit(c))
1092 						error(arg);
1093 
1094 					level = atoi(arg + 3);
1095 					if (level > 5)
1096 						error(arg);
1097 					if (level >= 2) {
1098 						/*
1099 						 * For gcc-3.4.x at -O2 we
1100 						 * need to disable optimizations
1101 						 * that break ON.
1102 						 */
1103 						optim_disable(ctx->i_ae, level);
1104 						/*
1105 						 * limit -xO3 to -O2 as well.
1106 						 */
1107 						level = 2;
1108 					}
1109 					if (asprintf(&s, "-O%d", level) == -1)
1110 						nomem();
1111 					newae(ctx->i_ae, s);
1112 					free(s);
1113 					break;
1114 				}
1115 				error(arg);
1116 				break;
1117 			case 'r':
1118 				if (strncmp(arg, "-xregs=", 7) == 0) {
1119 					xlate(ctx->i_ae, arg + 7, xregs_tbl);
1120 					break;
1121 				}
1122 				error(arg);
1123 				break;
1124 			case 's':
1125 				if (strcmp(arg, "-xs") == 0 ||
1126 				    strcmp(arg, "-xspace") == 0 ||
1127 				    strcmp(arg, "-xstrconst") == 0)
1128 					break;
1129 				error(arg);
1130 				break;
1131 			case 't':
1132 				if (strncmp(arg, "-xtarget=", 9) == 0) {
1133 					xlate(ctx->i_ae, arg + 9, xtarget_tbl);
1134 					break;
1135 				}
1136 				error(arg);
1137 				break;
1138 			case 'e':
1139 			case 'h':
1140 			case 'l':
1141 			default:
1142 				error(arg);
1143 				break;
1144 			}
1145 			break;
1146 		case 'Y':
1147 			if (arglen == 1) {
1148 				if ((arg = *++ctx->i_oldargv) == NULL ||
1149 				    *arg == '\0')
1150 					error("-Y");
1151 				ctx->i_oldargc--;
1152 				arglen = strlen(arg + 1);
1153 			} else {
1154 				arg += 2;
1155 			}
1156 			/* Just ignore -YS,... for now */
1157 			if (strncmp(arg, "S,", 2) == 0)
1158 				break;
1159 			if (strncmp(arg, "l,", 2) == 0) {
1160 				char *s = strdup(arg);
1161 				s[0] = '-';
1162 				s[1] = 'B';
1163 				newae(ctx->i_ae, s);
1164 				free(s);
1165 				break;
1166 			}
1167 			if (strncmp(arg, "I,", 2) == 0) {
1168 				char *s = strdup(arg);
1169 				s[0] = '-';
1170 				s[1] = 'I';
1171 				newae(ctx->i_ae, "-nostdinc");
1172 				newae(ctx->i_ae, s);
1173 				free(s);
1174 				break;
1175 			}
1176 			error(arg);
1177 			break;
1178 		case 'Q':
1179 			/*
1180 			 * We could map -Qy into -Wl,-Qy etc.
1181 			 */
1182 		default:
1183 			error(arg);
1184 			break;
1185 		}
1186 	}
1187 
1188 	free(nameflag);
1189 
1190 	if (c_files > 1 && (ctx->i_flags & CW_F_SHADOW) &&
1191 	    op != CW_O_PREPROCESS) {
1192 		errx(2, "multiple source files are "
1193 		    "allowed only with -E or -P");
1194 	}
1195 
1196 	/*
1197 	 * Make sure that we do not have any unintended interactions between
1198 	 * the xarch options passed in and the version of the Studio compiler
1199 	 * used.
1200 	 */
1201 	if ((mflag & (SS11|SS12)) == (SS11|SS12)) {
1202 		errx(2,
1203 		    "Conflicting \"-xarch=\" flags (both Studio 11 and 12)\n");
1204 	}
1205 
1206 	switch (mflag) {
1207 	case 0:
1208 		/* FALLTHROUGH */
1209 	case M32:
1210 #if defined(__sparc)
1211 		/*
1212 		 * Only -m32 is defined and so put in the missing xarch
1213 		 * translation.
1214 		 */
1215 		newae(ctx->i_ae, "-mcpu=v8");
1216 		newae(ctx->i_ae, "-mno-v8plus");
1217 #endif
1218 		break;
1219 	case M64:
1220 #if defined(__sparc)
1221 		/*
1222 		 * Only -m64 is defined and so put in the missing xarch
1223 		 * translation.
1224 		 */
1225 		newae(ctx->i_ae, "-mcpu=v9");
1226 #endif
1227 		break;
1228 	case SS12:
1229 #if defined(__sparc)
1230 		/* no -m32/-m64 flag used - this is an error for sparc builds */
1231 		(void) fprintf(stderr, "No -m32/-m64 flag defined\n");
1232 		exit(2);
1233 #endif
1234 		break;
1235 	case SS11:
1236 		/* FALLTHROUGH */
1237 	case (SS11|M32):
1238 	case (SS11|M64):
1239 		break;
1240 	case (SS12|M32):
1241 #if defined(__sparc)
1242 		/*
1243 		 * Need to add in further 32 bit options because with SS12
1244 		 * the xarch=sparcvis option can be applied to 32 or 64
1245 		 * bit, and so the translatation table (xtbl) cannot handle
1246 		 * that.
1247 		 */
1248 		newae(ctx->i_ae, "-mv8plus");
1249 #endif
1250 		break;
1251 	case (SS12|M64):
1252 		break;
1253 	default:
1254 		(void) fprintf(stderr,
1255 		    "Incompatible -xarch= and/or -m32/-m64 options used.\n");
1256 		exit(2);
1257 	}
1258 
1259 	if ((op == CW_O_LINK || op == CW_O_PREPROCESS) &&
1260 	    (ctx->i_flags & CW_F_SHADOW))
1261 		exit(0);
1262 
1263 	if (model != NULL)
1264 		newae(ctx->i_ae, model);
1265 	if (!nolibc)
1266 		newae(ctx->i_ae, "-lc");
1267 	if (!seen_o && (ctx->i_flags & CW_F_SHADOW)) {
1268 		newae(ctx->i_ae, "-o");
1269 		newae(ctx->i_ae, ctx->i_discard);
1270 	}
1271 }
1272 
1273 static void
1274 do_cc(cw_ictx_t *ctx)
1275 {
1276 	int in_output = 0, seen_o = 0;
1277 	cw_op_t op = CW_O_LINK;
1278 	char *nameflag;
1279 
1280 	if (ctx->i_flags & CW_F_PROG) {
1281 		newae(ctx->i_ae, "-V");
1282 		return;
1283 	}
1284 
1285 	if (asprintf(&nameflag, "-_%s=", ctx->i_compiler->c_name) == -1)
1286 		nomem();
1287 
1288 	while (--ctx->i_oldargc > 0) {
1289 		char *arg = *++ctx->i_oldargv;
1290 
1291 		if (strncmp(arg, "-_CC=", 5) == 0) {
1292 			newae(ctx->i_ae, strchr(arg, '=') + 1);
1293 			continue;
1294 		}
1295 
1296 		if (*arg != '-') {
1297 			if (in_output == 0 || !(ctx->i_flags & CW_F_SHADOW)) {
1298 				newae(ctx->i_ae, arg);
1299 			} else {
1300 				in_output = 0;
1301 				newae(ctx->i_ae, ctx->i_discard);
1302 			}
1303 			continue;
1304 		}
1305 		switch (*(arg + 1)) {
1306 		case '_':
1307 			if ((strncmp(arg, nameflag, strlen(nameflag)) == 0) ||
1308 			    (strncmp(arg, "-_cc=", 5) == 0) ||
1309 			    (strncmp(arg, "-_sun=", 6) == 0)) {
1310 				newae(ctx->i_ae, strchr(arg, '=') + 1);
1311 			}
1312 			break;
1313 
1314 		case 'V':
1315 			ctx->i_flags &= ~CW_F_ECHO;
1316 			newae(ctx->i_ae, arg);
1317 			break;
1318 		case 'o':
1319 			seen_o = 1;
1320 			if (strlen(arg) == 2) {
1321 				in_output = 1;
1322 				newae(ctx->i_ae, arg);
1323 			} else if (ctx->i_flags & CW_F_SHADOW) {
1324 				newae(ctx->i_ae, "-o");
1325 				newae(ctx->i_ae, ctx->i_discard);
1326 			} else {
1327 				newae(ctx->i_ae, arg);
1328 			}
1329 			break;
1330 		case 'c':
1331 		case 'S':
1332 			if (strlen(arg) == 2)
1333 				op = CW_O_COMPILE;
1334 			newae(ctx->i_ae, arg);
1335 			break;
1336 		case 'E':
1337 		case 'P':
1338 			if (strlen(arg) == 2)
1339 				op = CW_O_PREPROCESS;
1340 		/*FALLTHROUGH*/
1341 		default:
1342 			newae(ctx->i_ae, arg);
1343 		}
1344 	}
1345 
1346 	free(nameflag);
1347 
1348 	if ((op == CW_O_LINK || op == CW_O_PREPROCESS) &&
1349 	    (ctx->i_flags & CW_F_SHADOW))
1350 		exit(0);
1351 
1352 	if (!seen_o && (ctx->i_flags & CW_F_SHADOW)) {
1353 		newae(ctx->i_ae, "-o");
1354 		newae(ctx->i_ae, ctx->i_discard);
1355 	}
1356 }
1357 
1358 static void
1359 prepctx(cw_ictx_t *ctx)
1360 {
1361 	newae(ctx->i_ae, ctx->i_compiler->c_path);
1362 
1363 	if (ctx->i_flags & CW_F_PROG) {
1364 		(void) printf("%s: %s\n", (ctx->i_flags & CW_F_SHADOW) ?
1365 		    "shadow" : "primary", ctx->i_compiler->c_path);
1366 		(void) fflush(stdout);
1367 	}
1368 
1369 	if (!(ctx->i_flags & CW_F_XLATE))
1370 		return;
1371 
1372 	switch (ctx->i_compiler->c_style) {
1373 	case SUN:
1374 		do_cc(ctx);
1375 		break;
1376 	case GNU:
1377 		do_gcc(ctx);
1378 		break;
1379 	}
1380 }
1381 
1382 static int
1383 invoke(cw_ictx_t *ctx)
1384 {
1385 	char **newargv;
1386 	int ac;
1387 	struct ae *a;
1388 
1389 	if ((newargv = calloc(sizeof (*newargv), ctx->i_ae->ael_argc + 1)) ==
1390 	    NULL)
1391 		nomem();
1392 
1393 	if (ctx->i_flags & CW_F_ECHO)
1394 		(void) fprintf(stderr, "+ ");
1395 
1396 	for (ac = 0, a = ctx->i_ae->ael_head; a; a = a->ae_next, ac++) {
1397 		newargv[ac] = a->ae_arg;
1398 		if (ctx->i_flags & CW_F_ECHO)
1399 			(void) fprintf(stderr, "%s ", a->ae_arg);
1400 		if (a == ctx->i_ae->ael_tail)
1401 			break;
1402 	}
1403 
1404 	if (ctx->i_flags & CW_F_ECHO) {
1405 		(void) fprintf(stderr, "\n");
1406 		(void) fflush(stderr);
1407 	}
1408 
1409 	if (!(ctx->i_flags & CW_F_EXEC))
1410 		return (0);
1411 
1412 	/*
1413 	 * We must fix up the environment here so that the dependency files are
1414 	 * not trampled by the shadow compiler. Also take care of GCC
1415 	 * environment variables that will throw off gcc. This assumes a primary
1416 	 * gcc.
1417 	 */
1418 	if ((ctx->i_flags & CW_F_SHADOW) &&
1419 	    (unsetenv("SUNPRO_DEPENDENCIES") != 0 ||
1420 	    unsetenv("DEPENDENCIES_OUTPUT") != 0 ||
1421 	    unsetenv("GCC_ROOT") != 0)) {
1422 		(void) fprintf(stderr, "error: environment setup failed: %s\n",
1423 		    strerror(errno));
1424 		return (-1);
1425 	}
1426 
1427 	(void) execv(newargv[0], newargv);
1428 	warn("couldn't run %s", newargv[0]);
1429 
1430 	return (-1);
1431 }
1432 
1433 static int
1434 reap(cw_ictx_t *ctx)
1435 {
1436 	int status, ret = 0;
1437 	char buf[1024];
1438 	struct stat s;
1439 
1440 	/*
1441 	 * Only wait for one specific child.
1442 	 */
1443 	if (ctx->i_pid <= 0)
1444 		return (-1);
1445 
1446 	do {
1447 		if (waitpid(ctx->i_pid, &status, 0) < 0) {
1448 			warn("cannot reap child");
1449 			return (-1);
1450 		}
1451 		if (status != 0) {
1452 			if (WIFSIGNALED(status)) {
1453 				ret = -WTERMSIG(status);
1454 				break;
1455 			} else if (WIFEXITED(status)) {
1456 				ret = WEXITSTATUS(status);
1457 				break;
1458 			}
1459 		}
1460 	} while (!WIFEXITED(status) && !WIFSIGNALED(status));
1461 
1462 	(void) unlink(ctx->i_discard);
1463 
1464 	if (stat(ctx->i_stderr, &s) < 0) {
1465 		warn("stat failed on child cleanup");
1466 		return (-1);
1467 	}
1468 	if (s.st_size != 0) {
1469 		FILE *f;
1470 
1471 		if ((f = fopen(ctx->i_stderr, "r")) != NULL) {
1472 			while (fgets(buf, sizeof (buf), f))
1473 				(void) fprintf(stderr, "%s", buf);
1474 			(void) fflush(stderr);
1475 			(void) fclose(f);
1476 		}
1477 	}
1478 	(void) unlink(ctx->i_stderr);
1479 	free(ctx->i_stderr);
1480 
1481 	/*
1482 	 * cc returns an error code when given -V; we want that to succeed.
1483 	 */
1484 	if (ctx->i_flags & CW_F_PROG)
1485 		return (0);
1486 
1487 	return (ret);
1488 }
1489 
1490 static int
1491 exec_ctx(cw_ictx_t *ctx, int block)
1492 {
1493 	char *file;
1494 
1495 	/*
1496 	 * To avoid offending cc's sensibilities, the name of its output
1497 	 * file must end in '.o'.
1498 	 */
1499 	if ((file = tempnam(NULL, ".cw")) == NULL) {
1500 		nomem();
1501 		return (-1);
1502 	}
1503 	(void) strlcpy(ctx->i_discard, file, MAXPATHLEN);
1504 	(void) strlcat(ctx->i_discard, ".o", MAXPATHLEN);
1505 	free(file);
1506 
1507 	if ((ctx->i_stderr = tempnam(NULL, ".cw")) == NULL) {
1508 		nomem();
1509 		return (-1);
1510 	}
1511 
1512 	if ((ctx->i_pid = fork()) == 0) {
1513 		int fd;
1514 
1515 		(void) fclose(stderr);
1516 		if ((fd = open(ctx->i_stderr, O_WRONLY | O_CREAT | O_EXCL,
1517 		    0666)) < 0) {
1518 			err(1, "open failed for standard error");
1519 		}
1520 		if (dup2(fd, 2) < 0) {
1521 			err(1, "dup2 failed for standard error");
1522 		}
1523 		if (fd != 2)
1524 			(void) close(fd);
1525 		if (freopen("/dev/fd/2", "w", stderr) == NULL) {
1526 			err(1, "freopen failed for /dev/fd/2");
1527 		}
1528 
1529 		prepctx(ctx);
1530 		exit(invoke(ctx));
1531 	}
1532 
1533 	if (ctx->i_pid < 0) {
1534 		err(1, "fork failed");
1535 	}
1536 
1537 	if (block)
1538 		return (reap(ctx));
1539 
1540 	return (0);
1541 }
1542 
1543 static void
1544 parse_compiler(const char *spec, cw_compiler_t *compiler)
1545 {
1546 	char *tspec, *token;
1547 
1548 	if ((tspec = strdup(spec)) == NULL)
1549 		nomem();
1550 
1551 	if ((token = strsep(&tspec, ",")) == NULL)
1552 		errx(1, "Compiler is missing a name: %s", spec);
1553 	compiler->c_name = token;
1554 
1555 	if ((token = strsep(&tspec, ",")) == NULL)
1556 		errx(1, "Compiler is missing a path: %s", spec);
1557 	compiler->c_path = token;
1558 
1559 	if ((token = strsep(&tspec, ",")) == NULL)
1560 		errx(1, "Compiler is missing a style: %s", spec);
1561 
1562 	if ((strcasecmp(token, "gnu") == 0) ||
1563 	    (strcasecmp(token, "gcc") == 0))
1564 		compiler->c_style = GNU;
1565 	else if ((strcasecmp(token, "sun") == 0) ||
1566 	    (strcasecmp(token, "cc") == 0))
1567 		compiler->c_style = SUN;
1568 	else
1569 		errx(1, "unknown compiler style: %s", token);
1570 
1571 	if (tspec != NULL)
1572 		errx(1, "Excess tokens in compiler: %s", spec);
1573 }
1574 
1575 int
1576 main(int argc, char **argv)
1577 {
1578 	int ch;
1579 	cw_compiler_t primary = { NULL, NULL, 0 };
1580 	cw_compiler_t shadows[10];
1581 	int nshadows = 0;
1582 	int ret = 0;
1583 	boolean_t do_serial = B_FALSE;
1584 	boolean_t do_exec = B_FALSE;
1585 	boolean_t vflg = B_FALSE;
1586 	boolean_t Cflg = B_FALSE;
1587 	boolean_t cflg = B_FALSE;
1588 	boolean_t nflg = B_FALSE;
1589 
1590 	cw_ictx_t *main_ctx;
1591 
1592 	static struct option longopts[] = {
1593 		{ "compiler", no_argument, NULL, 'c' },
1594 		{ "noecho", no_argument, NULL, 'n' },
1595 		{ "primary", required_argument, NULL, 'p' },
1596 		{ "shadow", required_argument, NULL, 's' },
1597 		{ "versions", no_argument, NULL, 'v' },
1598 		{ NULL, 0, NULL, 0 },
1599 	};
1600 
1601 
1602 	if ((main_ctx = newictx()) == NULL)
1603 		nomem();
1604 
1605 	while ((ch = getopt_long(argc, argv, "C", longopts, NULL)) != -1) {
1606 		switch (ch) {
1607 		case 'c':
1608 			cflg = B_TRUE;
1609 			break;
1610 		case 'C':
1611 			Cflg = B_TRUE;
1612 			break;
1613 		case 'n':
1614 			nflg = B_TRUE;
1615 			break;
1616 		case 'p':
1617 			if (primary.c_path != NULL) {
1618 				warnx("Only one primary compiler may "
1619 				    "be specified");
1620 				usage();
1621 			}
1622 
1623 			parse_compiler(optarg, &primary);
1624 			break;
1625 		case 's':
1626 			if (nshadows >= 10)
1627 				errx(1, "May only use 10 shadows at "
1628 				    "the moment");
1629 			parse_compiler(optarg, &shadows[nshadows]);
1630 			nshadows++;
1631 			break;
1632 		case 'v':
1633 			vflg = B_TRUE;
1634 			break;
1635 		default:
1636 			(void) fprintf(stderr, "Did you forget '--'?\n");
1637 			usage();
1638 		}
1639 	}
1640 
1641 	if (primary.c_path == NULL) {
1642 		warnx("A primary compiler must be specified");
1643 		usage();
1644 	}
1645 
1646 	do_serial = (getenv("CW_SHADOW_SERIAL") == NULL) ? B_FALSE : B_TRUE;
1647 	do_exec = (getenv("CW_NO_EXEC") == NULL) ? B_TRUE : B_FALSE;
1648 
1649 	/* Leave room for argv[0] */
1650 	argc -= (optind - 1);
1651 	argv += (optind - 1);
1652 
1653 	main_ctx->i_oldargc = argc;
1654 	main_ctx->i_oldargv = argv;
1655 	main_ctx->i_flags = CW_F_XLATE;
1656 	if (nflg == 0)
1657 		main_ctx->i_flags |= CW_F_ECHO;
1658 	if (do_exec)
1659 		main_ctx->i_flags |= CW_F_EXEC;
1660 	if (Cflg)
1661 		main_ctx->i_flags |= CW_F_CXX;
1662 	main_ctx->i_compiler = &primary;
1663 
1664 	if (cflg) {
1665 		(void) fputs(primary.c_path, stdout);
1666 	}
1667 
1668 	if (vflg) {
1669 		(void) printf("cw version %s\n", CW_VERSION);
1670 		(void) fflush(stdout);
1671 		main_ctx->i_flags &= ~CW_F_ECHO;
1672 		main_ctx->i_flags |= CW_F_PROG | CW_F_EXEC;
1673 		do_serial = 1;
1674 	}
1675 
1676 	ret |= exec_ctx(main_ctx, do_serial);
1677 
1678 	for (int i = 0; i < nshadows; i++) {
1679 		int r;
1680 		cw_ictx_t *shadow_ctx;
1681 
1682 		if ((shadow_ctx = newictx()) == NULL)
1683 			nomem();
1684 
1685 		memcpy(shadow_ctx, main_ctx, sizeof (cw_ictx_t));
1686 
1687 		shadow_ctx->i_flags |= CW_F_SHADOW;
1688 		shadow_ctx->i_compiler = &shadows[i];
1689 
1690 		r = exec_ctx(shadow_ctx, do_serial);
1691 		if (r == 0) {
1692 			shadow_ctx->i_next = main_ctx->i_next;
1693 			main_ctx->i_next = shadow_ctx;
1694 		}
1695 		ret |= r;
1696 	}
1697 
1698 	if (!do_serial) {
1699 		cw_ictx_t *next = main_ctx;
1700 		while (next != NULL) {
1701 			cw_ictx_t *toreap = next;
1702 			next = next->i_next;
1703 			ret |= reap(toreap);
1704 		}
1705 	}
1706 
1707 	return (ret);
1708 }
1709