xref: /illumos-gate/usr/src/tools/cw/cw.c (revision e1bf37b1)
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 /* ARGSUSED */
483 static void
484 Xamode(struct aelist __unused *h)
485 {
486 }
487 
488 static void
489 Xsmode(struct aelist *h)
490 {
491 	static int xsonce;
492 
493 	if (xsonce++)
494 		return;
495 
496 	newae(h, "-traditional");
497 	newae(h, "-traditional-cpp");
498 }
499 
500 static void
501 usage()
502 {
503 	extern char *__progname;
504 	(void) fprintf(stderr,
505 	    "usage: %s [-C] [--versions] --primary <compiler> "
506 	    "[--shadow <compiler>]... -- cflags...\n",
507 	    __progname);
508 	(void) fprintf(stderr, "compilers take the form: name,path,style\n"
509 	    " - name: a unique name usable in flag specifiers\n"
510 	    " - path: path to the compiler binary\n"
511 	    " - style: the style of flags expected: either sun or gnu\n");
512 	exit(2);
513 }
514 
515 static int
516 xlate_xtb(struct aelist *h, const char *xarg)
517 {
518 	int	i, j;
519 
520 	for (i = 0; i < xtbl_size; i++) {
521 		if (strcmp(xtbl[i].x_arg, xarg) == 0)
522 			break;
523 	}
524 
525 	/*
526 	 * At the end of the table and so no matching "arg" entry
527 	 * found and so this must be a bad -xarch= flag.
528 	 */
529 	if (i == xtbl_size)
530 		error(xarg);
531 
532 	for (j = 0; j < TRANS_ENTRY; j++) {
533 		if (xtbl[i].x_trans[j] != NULL)
534 			newae(h, xtbl[i].x_trans[j]);
535 		else
536 			break;
537 	}
538 	return (xtbl[i].x_flags);
539 
540 }
541 
542 static void
543 xlate(struct aelist *h, const char *xarg, const char **table)
544 {
545 	while (*table != NULL && strcmp(xarg, *table) != 0) {
546 		while (*table != NULL)
547 			table++;
548 		table++;
549 	}
550 
551 	if (*table == NULL)
552 		error(xarg);
553 
554 	table++;
555 
556 	while (*table != NULL) {
557 		newae(h, *table);
558 		table++;
559 	}
560 }
561 
562 static void
563 do_gcc(cw_ictx_t *ctx)
564 {
565 	int c;
566 	int nolibc = 0;
567 	int in_output = 0, seen_o = 0, c_files = 0;
568 	cw_op_t op = CW_O_LINK;
569 	char *model = NULL;
570 	char *nameflag;
571 	int	mflag = 0;
572 
573 	if (ctx->i_flags & CW_F_PROG) {
574 		newae(ctx->i_ae, "--version");
575 		return;
576 	}
577 
578 	newae(ctx->i_ae, "-fident");
579 	newae(ctx->i_ae, "-finline");
580 	newae(ctx->i_ae, "-fno-inline-functions");
581 	newae(ctx->i_ae, "-fno-builtin");
582 	newae(ctx->i_ae, "-fno-asm");
583 	newae(ctx->i_ae, "-fdiagnostics-show-option");
584 	newae(ctx->i_ae, "-nodefaultlibs");
585 
586 #if defined(__sparc)
587 	/*
588 	 * The SPARC ldd and std instructions require 8-byte alignment of
589 	 * their address operand.  gcc correctly uses them only when the
590 	 * ABI requires 8-byte alignment; unfortunately we have a number of
591 	 * pieces of buggy code that doesn't conform to the ABI.  This
592 	 * flag makes gcc work more like Studio with -xmemalign=4.
593 	 */
594 	newae(ctx->i_ae, "-mno-integer-ldd-std");
595 #endif
596 
597 	/*
598 	 * This is needed because 'u' is defined
599 	 * under a conditional on 'sun'.  Should
600 	 * probably just remove the conditional,
601 	 * or make it be dependent on '__sun'.
602 	 *
603 	 * -Dunix is also missing in enhanced ANSI mode
604 	 */
605 	newae(ctx->i_ae, "-D__sun");
606 
607 	if (asprintf(&nameflag, "-_%s=", ctx->i_compiler->c_name) == -1)
608 		nomem();
609 
610 	/*
611 	 * Walk the argument list, translating as we go ..
612 	 */
613 	while (--ctx->i_oldargc > 0) {
614 		char *arg = *++ctx->i_oldargv;
615 		size_t arglen = strlen(arg);
616 
617 		if (*arg == '-') {
618 			arglen--;
619 		} else {
620 			/*
621 			 * Discard inline files that gcc doesn't grok
622 			 */
623 			if (!in_output && arglen > 3 &&
624 			    strcmp(arg + arglen - 3, ".il") == 0)
625 				continue;
626 
627 			if (!in_output && arglen > 2 &&
628 			    arg[arglen - 2] == '.' &&
629 			    (arg[arglen - 1] == 'S' || arg[arglen - 1] == 's' ||
630 			    arg[arglen - 1] == 'c' || arg[arglen - 1] == 'i'))
631 				c_files++;
632 
633 			/*
634 			 * Otherwise, filenames and partial arguments
635 			 * are passed through for gcc to chew on.  However,
636 			 * output is always discarded for the secondary
637 			 * compiler.
638 			 */
639 			if ((ctx->i_flags & CW_F_SHADOW) && in_output)
640 				newae(ctx->i_ae, ctx->i_discard);
641 			else
642 				newae(ctx->i_ae, arg);
643 			in_output = 0;
644 			continue;
645 		}
646 
647 		if (ctx->i_flags & CW_F_CXX) {
648 			if (strncmp(arg, "-_g++=", 6) == 0) {
649 				newae(ctx->i_ae, strchr(arg, '=') + 1);
650 				continue;
651 			}
652 			if (strncmp(arg, "-compat=", 8) == 0) {
653 				/* discard -compat=4 and -compat=5 */
654 				continue;
655 			}
656 			if (strcmp(arg, "-Qoption") == 0) {
657 				/* discard -Qoption and its two arguments */
658 				if (ctx->i_oldargc < 3)
659 					error(arg);
660 				ctx->i_oldargc -= 2;
661 				ctx->i_oldargv += 2;
662 				continue;
663 			}
664 			if (strcmp(arg, "-xwe") == 0) {
665 				/* turn warnings into errors */
666 				newae(ctx->i_ae, "-Werror");
667 				continue;
668 			}
669 			if (strcmp(arg, "-norunpath") == 0) {
670 				/* gcc has no corresponding option */
671 				continue;
672 			}
673 			if (strcmp(arg, "-nolib") == 0) {
674 				/* -nodefaultlibs is on by default */
675 				nolibc = 1;
676 				continue;
677 			}
678 #if defined(__sparc)
679 			if (strcmp(arg, "-cg92") == 0) {
680 				mflag |= xlate_xtb(ctx->i_ae, "v8");
681 				xlate(ctx->i_ae, "super", xchip_tbl);
682 				continue;
683 			}
684 #endif	/* __sparc */
685 		}
686 
687 		switch ((c = arg[1])) {
688 		case '_':
689 			if ((strncmp(arg, nameflag, strlen(nameflag)) == 0) ||
690 			    (strncmp(arg, "-_gcc=", 6) == 0) ||
691 			    (strncmp(arg, "-_gnu=", 6) == 0)) {
692 				newae(ctx->i_ae, strchr(arg, '=') + 1);
693 			}
694 			break;
695 		case '#':
696 			if (arglen == 1) {
697 				newae(ctx->i_ae, "-v");
698 				break;
699 			}
700 			error(arg);
701 			break;
702 		case 'f':
703 			if ((strcmp(arg, "-fpic") == 0) ||
704 			    (strcmp(arg, "-fPIC") == 0)) {
705 				newae(ctx->i_ae, arg);
706 				break;
707 			}
708 			error(arg);
709 			break;
710 		case 'g':
711 			newae(ctx->i_ae, "-gdwarf-2");
712 			break;
713 		case 'E':
714 			if (arglen == 1) {
715 				newae(ctx->i_ae, "-xc");
716 				newae(ctx->i_ae, arg);
717 				op = CW_O_PREPROCESS;
718 				nolibc = 1;
719 				break;
720 			}
721 			error(arg);
722 			break;
723 		case 'c':
724 		case 'S':
725 			if (arglen == 1) {
726 				op = CW_O_COMPILE;
727 				nolibc = 1;
728 			}
729 			/* FALLTHROUGH */
730 		case 'C':
731 		case 'H':
732 		case 'p':
733 			if (arglen == 1) {
734 				newae(ctx->i_ae, arg);
735 				break;
736 			}
737 			error(arg);
738 			break;
739 		case 'A':
740 		case 'h':
741 		case 'I':
742 		case 'i':
743 		case 'L':
744 		case 'l':
745 		case 'R':
746 		case 'U':
747 		case 'u':
748 		case 'w':
749 			newae(ctx->i_ae, arg);
750 			break;
751 		case 'o':
752 			seen_o = 1;
753 			if (arglen == 1) {
754 				in_output = 1;
755 				newae(ctx->i_ae, arg);
756 			} else if (ctx->i_flags & CW_F_SHADOW) {
757 				newae(ctx->i_ae, "-o");
758 				newae(ctx->i_ae, ctx->i_discard);
759 			} else {
760 				newae(ctx->i_ae, arg);
761 			}
762 			break;
763 		case 'D':
764 			newae(ctx->i_ae, arg);
765 			/*
766 			 * XXX	Clearly a hack ... do we need _KADB too?
767 			 */
768 			if (strcmp(arg, "-D_KERNEL") == 0 ||
769 			    strcmp(arg, "-D_BOOT") == 0)
770 				newae(ctx->i_ae, "-ffreestanding");
771 			break;
772 		case 'd':
773 			if (arglen == 2) {
774 				if (strcmp(arg, "-dy") == 0) {
775 					newae(ctx->i_ae, "-Wl,-dy");
776 					break;
777 				}
778 				if (strcmp(arg, "-dn") == 0) {
779 					newae(ctx->i_ae, "-Wl,-dn");
780 					break;
781 				}
782 			}
783 			if (strcmp(arg, "-dalign") == 0) {
784 				/*
785 				 * -dalign forces alignment in some cases;
786 				 * gcc does not need any flag to do this.
787 				 */
788 				break;
789 			}
790 			error(arg);
791 			break;
792 		case 'e':
793 			if (strcmp(arg,
794 			    "-erroff=E_EMPTY_TRANSLATION_UNIT") == 0) {
795 				/*
796 				 * Accept but ignore this -- gcc doesn't
797 				 * seem to complain about empty translation
798 				 * units
799 				 */
800 				break;
801 			}
802 			/* XX64 -- ignore all -erroff= options, for now */
803 			if (strncmp(arg, "-erroff=", 8) == 0)
804 				break;
805 			if (strcmp(arg, "-errtags=yes") == 0) {
806 				warnings(ctx->i_ae);
807 				break;
808 			}
809 			if (strcmp(arg, "-errwarn=%all") == 0) {
810 				newae(ctx->i_ae, "-Werror");
811 				break;
812 			}
813 			error(arg);
814 			break;
815 		case 'G':
816 			newae(ctx->i_ae, "-shared");
817 			nolibc = 1;
818 			break;
819 		case 'k':
820 			if (strcmp(arg, "-keeptmp") == 0) {
821 				newae(ctx->i_ae, "-save-temps");
822 				break;
823 			}
824 			error(arg);
825 			break;
826 		case 'm':
827 			if (strcmp(arg, "-mt") == 0) {
828 				newae(ctx->i_ae, "-D_REENTRANT");
829 				break;
830 			}
831 			if (strcmp(arg, "-m64") == 0) {
832 				newae(ctx->i_ae, "-m64");
833 #if defined(__x86)
834 				newae(ctx->i_ae, "-mtune=opteron");
835 #endif
836 				mflag |= M64;
837 				break;
838 			}
839 			if (strcmp(arg, "-m32") == 0) {
840 				newae(ctx->i_ae, "-m32");
841 				mflag |= M32;
842 				break;
843 			}
844 			error(arg);
845 			break;
846 		case 'B':	/* linker options */
847 		case 'M':
848 		case 'z':
849 			{
850 				char *opt;
851 				size_t len;
852 				char *s;
853 
854 				if (arglen == 1) {
855 					opt = *++ctx->i_oldargv;
856 					if (opt == NULL || *opt == '\0')
857 						error(arg);
858 					ctx->i_oldargc--;
859 				} else {
860 					opt = arg + 2;
861 				}
862 				len = strlen(opt) + 7;
863 				if ((s = malloc(len)) == NULL)
864 					nomem();
865 				(void) snprintf(s, len, "-Wl,-%c%s", c, opt);
866 				newae(ctx->i_ae, s);
867 				free(s);
868 			}
869 			break;
870 		case 'O':
871 			if (arglen == 1) {
872 				newae(ctx->i_ae, "-O");
873 				break;
874 			}
875 			error(arg);
876 			break;
877 		case 'P':
878 			/*
879 			 * We could do '-E -o filename.i', but that's hard,
880 			 * and we don't need it for the case that's triggering
881 			 * this addition.  We'll require the user to specify
882 			 * -o in the Makefile.  If they don't they'll find out
883 			 * in a hurry.
884 			 */
885 			newae(ctx->i_ae, "-E");
886 			op = CW_O_PREPROCESS;
887 			nolibc = 1;
888 			break;
889 		case 's':
890 			if (arglen == 1) {
891 				newae(ctx->i_ae, "-Wl,-s");
892 				break;
893 			}
894 			error(arg);
895 			break;
896 		case 't':
897 			if (arglen == 1) {
898 				newae(ctx->i_ae, "-Wl,-t");
899 				break;
900 			}
901 			error(arg);
902 			break;
903 		case 'V':
904 			if (arglen == 1) {
905 				ctx->i_flags &= ~CW_F_ECHO;
906 				newae(ctx->i_ae, "--version");
907 				break;
908 			}
909 			error(arg);
910 			break;
911 		case 'v':
912 			if (arglen == 1) {
913 				warnings(ctx->i_ae);
914 				break;
915 			}
916 			error(arg);
917 			break;
918 		case 'W':
919 			if (strncmp(arg, "-Wp,-xc99", 9) == 0) {
920 				/*
921 				 * gcc's preprocessor will accept c99
922 				 * regardless, so accept and ignore.
923 				 */
924 				break;
925 			}
926 			if (strncmp(arg, "-Wa,", 4) == 0 ||
927 			    strncmp(arg, "-Wp,", 4) == 0 ||
928 			    strncmp(arg, "-Wl,", 4) == 0) {
929 				newae(ctx->i_ae, arg);
930 				break;
931 			}
932 			if (strcmp(arg, "-W0,-noglobal") == 0 ||
933 			    strcmp(arg, "-W0,-xglobalstatic") == 0) {
934 				/*
935 				 * gcc doesn't prefix local symbols
936 				 * in debug mode, so this is not needed.
937 				 */
938 				break;
939 			}
940 			if (strcmp(arg, "-W0,-Lt") == 0) {
941 				/*
942 				 * Generate tests at the top of loops.
943 				 * There is no direct gcc equivalent, ignore.
944 				 */
945 				break;
946 			}
947 			if (strcmp(arg, "-W0,-xdbggen=no%usedonly") == 0) {
948 				newae(ctx->i_ae,
949 				    "-fno-eliminate-unused-debug-symbols");
950 				newae(ctx->i_ae,
951 				    "-fno-eliminate-unused-debug-types");
952 				break;
953 			}
954 			if (strcmp(arg, "-W2,-xwrap_int") == 0) {
955 				/*
956 				 * Use the legacy behaviour (pre-SS11)
957 				 * for integer wrapping.
958 				 * gcc does not need this.
959 				 */
960 				break;
961 			}
962 			if (strcmp(arg, "-Wd,-xsafe=unboundsym") == 0) {
963 				/*
964 				 * Prevents optimizing away checks for
965 				 * unbound weak symbol addresses.  gcc does
966 				 * not do this, so it's not needed.
967 				 */
968 				break;
969 			}
970 			if (strncmp(arg, "-Wc,-xcode=", 11) == 0) {
971 				xlate(ctx->i_ae, arg + 11, xcode_tbl);
972 				break;
973 			}
974 			if (strncmp(arg, "-Wc,-Qiselect", 13) == 0) {
975 				/*
976 				 * Prevents insertion of register symbols.
977 				 * gcc doesn't do this, so ignore it.
978 				 */
979 				break;
980 			}
981 			if (strcmp(arg, "-Wc,-Qassembler-ounrefsym=0") == 0) {
982 				/*
983 				 * Prevents optimizing away of static variables.
984 				 * gcc does not do this, so it's not needed.
985 				 */
986 				break;
987 			}
988 #if defined(__x86)
989 			if (strcmp(arg, "-Wu,-save_args") == 0) {
990 				newae(ctx->i_ae, "-msave-args");
991 				break;
992 			}
993 #endif	/* __x86 */
994 			error(arg);
995 			break;
996 		case 'X':
997 			if (strcmp(arg, "-Xa") == 0 ||
998 			    strcmp(arg, "-Xt") == 0) {
999 				Xamode(ctx->i_ae);
1000 				break;
1001 			}
1002 			if (strcmp(arg, "-Xs") == 0) {
1003 				Xsmode(ctx->i_ae);
1004 				break;
1005 			}
1006 			error(arg);
1007 			break;
1008 		case 'x':
1009 			if (arglen == 1)
1010 				error(arg);
1011 			switch (arg[2]) {
1012 			case 'a':
1013 				if (strncmp(arg, "-xarch=", 7) == 0) {
1014 					mflag |= xlate_xtb(ctx->i_ae, arg + 7);
1015 					break;
1016 				}
1017 				error(arg);
1018 				break;
1019 			case 'b':
1020 				if (strncmp(arg, "-xbuiltin=", 10) == 0) {
1021 					if (strcmp(arg + 10, "%all"))
1022 						newae(ctx->i_ae, "-fbuiltin");
1023 					break;
1024 				}
1025 				error(arg);
1026 				break;
1027 			case 'C':
1028 				/* Accept C++ style comments -- ignore */
1029 				if (strcmp(arg, "-xCC") == 0)
1030 					break;
1031 				error(arg);
1032 				break;
1033 			case 'c':
1034 				if (strncmp(arg, "-xc99=%all", 10) == 0) {
1035 					newae(ctx->i_ae, "-std=gnu99");
1036 					break;
1037 				}
1038 				if (strncmp(arg, "-xc99=%none", 11) == 0) {
1039 					newae(ctx->i_ae, "-std=gnu89");
1040 					break;
1041 				}
1042 				if (strncmp(arg, "-xchip=", 7) == 0) {
1043 					xlate(ctx->i_ae, arg + 7, xchip_tbl);
1044 					break;
1045 				}
1046 				if (strncmp(arg, "-xcode=", 7) == 0) {
1047 					xlate(ctx->i_ae, arg + 7, xcode_tbl);
1048 					break;
1049 				}
1050 				if (strncmp(arg, "-xcrossfile", 11) == 0)
1051 					break;
1052 				error(arg);
1053 				break;
1054 			case 'd':
1055 				if (strncmp(arg, "-xdebugformat=", 14) == 0)
1056 					break;
1057 				error(arg);
1058 				break;
1059 			case 'F':
1060 				/*
1061 				 * Compile for mapfile reordering, or unused
1062 				 * section elimination, syntax can be -xF or
1063 				 * more complex, like -xF=%all -- ignore.
1064 				 */
1065 				if (strncmp(arg, "-xF", 3) == 0)
1066 					break;
1067 				error(arg);
1068 				break;
1069 			case 'i':
1070 				if (strncmp(arg, "-xinline", 8) == 0)
1071 					/* No inlining; ignore */
1072 					break;
1073 				if (strcmp(arg, "-xildon") == 0 ||
1074 				    strcmp(arg, "-xildoff") == 0)
1075 					/* No incremental linking; ignore */
1076 					break;
1077 				error(arg);
1078 				break;
1079 #if defined(__x86)
1080 			case 'm':
1081 				if (strcmp(arg, "-xmodel=kernel") == 0) {
1082 					newae(ctx->i_ae, "-ffreestanding");
1083 					newae(ctx->i_ae, "-mno-red-zone");
1084 					model = "-mcmodel=kernel";
1085 					nolibc = 1;
1086 					break;
1087 				}
1088 				error(arg);
1089 				break;
1090 #endif	/* __x86 */
1091 			case 'O':
1092 				if (strncmp(arg, "-xO", 3) == 0) {
1093 					size_t len = strlen(arg);
1094 					char *s = NULL;
1095 					int c = *(arg + 3);
1096 					int level;
1097 
1098 					if (len != 4 || !isdigit(c))
1099 						error(arg);
1100 
1101 					level = atoi(arg + 3);
1102 					if (level > 5)
1103 						error(arg);
1104 					if (level >= 2) {
1105 						/*
1106 						 * For gcc-3.4.x at -O2 we
1107 						 * need to disable optimizations
1108 						 * that break ON.
1109 						 */
1110 						optim_disable(ctx->i_ae, level);
1111 						/*
1112 						 * limit -xO3 to -O2 as well.
1113 						 */
1114 						level = 2;
1115 					}
1116 					if (asprintf(&s, "-O%d", level) == -1)
1117 						nomem();
1118 					newae(ctx->i_ae, s);
1119 					free(s);
1120 					break;
1121 				}
1122 				error(arg);
1123 				break;
1124 			case 'r':
1125 				if (strncmp(arg, "-xregs=", 7) == 0) {
1126 					xlate(ctx->i_ae, arg + 7, xregs_tbl);
1127 					break;
1128 				}
1129 				error(arg);
1130 				break;
1131 			case 's':
1132 				if (strcmp(arg, "-xs") == 0 ||
1133 				    strcmp(arg, "-xspace") == 0 ||
1134 				    strcmp(arg, "-xstrconst") == 0)
1135 					break;
1136 				error(arg);
1137 				break;
1138 			case 't':
1139 				if (strncmp(arg, "-xtarget=", 9) == 0) {
1140 					xlate(ctx->i_ae, arg + 9, xtarget_tbl);
1141 					break;
1142 				}
1143 				error(arg);
1144 				break;
1145 			case 'e':
1146 			case 'h':
1147 			case 'l':
1148 			default:
1149 				error(arg);
1150 				break;
1151 			}
1152 			break;
1153 		case 'Y':
1154 			if (arglen == 1) {
1155 				if ((arg = *++ctx->i_oldargv) == NULL ||
1156 				    *arg == '\0')
1157 					error("-Y");
1158 				ctx->i_oldargc--;
1159 				arglen = strlen(arg + 1);
1160 			} else {
1161 				arg += 2;
1162 			}
1163 			/* Just ignore -YS,... for now */
1164 			if (strncmp(arg, "S,", 2) == 0)
1165 				break;
1166 			if (strncmp(arg, "l,", 2) == 0) {
1167 				char *s = strdup(arg);
1168 				s[0] = '-';
1169 				s[1] = 'B';
1170 				newae(ctx->i_ae, s);
1171 				free(s);
1172 				break;
1173 			}
1174 			if (strncmp(arg, "I,", 2) == 0) {
1175 				char *s = strdup(arg);
1176 				s[0] = '-';
1177 				s[1] = 'I';
1178 				newae(ctx->i_ae, "-nostdinc");
1179 				newae(ctx->i_ae, s);
1180 				free(s);
1181 				break;
1182 			}
1183 			error(arg);
1184 			break;
1185 		case 'Q':
1186 			/*
1187 			 * We could map -Qy into -Wl,-Qy etc.
1188 			 */
1189 		default:
1190 			error(arg);
1191 			break;
1192 		}
1193 	}
1194 
1195 	free(nameflag);
1196 
1197 	if (c_files > 1 && (ctx->i_flags & CW_F_SHADOW) &&
1198 	    op != CW_O_PREPROCESS) {
1199 		errx(2, "multiple source files are "
1200 		    "allowed only with -E or -P");
1201 	}
1202 
1203 	/*
1204 	 * Make sure that we do not have any unintended interactions between
1205 	 * the xarch options passed in and the version of the Studio compiler
1206 	 * used.
1207 	 */
1208 	if ((mflag & (SS11|SS12)) == (SS11|SS12)) {
1209 		errx(2,
1210 		    "Conflicting \"-xarch=\" flags (both Studio 11 and 12)\n");
1211 	}
1212 
1213 	switch (mflag) {
1214 	case 0:
1215 		/* FALLTHROUGH */
1216 	case M32:
1217 #if defined(__sparc)
1218 		/*
1219 		 * Only -m32 is defined and so put in the missing xarch
1220 		 * translation.
1221 		 */
1222 		newae(ctx->i_ae, "-mcpu=v8");
1223 		newae(ctx->i_ae, "-mno-v8plus");
1224 #endif
1225 		break;
1226 	case M64:
1227 #if defined(__sparc)
1228 		/*
1229 		 * Only -m64 is defined and so put in the missing xarch
1230 		 * translation.
1231 		 */
1232 		newae(ctx->i_ae, "-mcpu=v9");
1233 #endif
1234 		break;
1235 	case SS12:
1236 #if defined(__sparc)
1237 		/* no -m32/-m64 flag used - this is an error for sparc builds */
1238 		(void) fprintf(stderr, "No -m32/-m64 flag defined\n");
1239 		exit(2);
1240 #endif
1241 		break;
1242 	case SS11:
1243 		/* FALLTHROUGH */
1244 	case (SS11|M32):
1245 	case (SS11|M64):
1246 		break;
1247 	case (SS12|M32):
1248 #if defined(__sparc)
1249 		/*
1250 		 * Need to add in further 32 bit options because with SS12
1251 		 * the xarch=sparcvis option can be applied to 32 or 64
1252 		 * bit, and so the translatation table (xtbl) cannot handle
1253 		 * that.
1254 		 */
1255 		newae(ctx->i_ae, "-mv8plus");
1256 #endif
1257 		break;
1258 	case (SS12|M64):
1259 		break;
1260 	default:
1261 		(void) fprintf(stderr,
1262 		    "Incompatible -xarch= and/or -m32/-m64 options used.\n");
1263 		exit(2);
1264 	}
1265 
1266 	if ((op == CW_O_LINK || op == CW_O_PREPROCESS) &&
1267 	    (ctx->i_flags & CW_F_SHADOW))
1268 		exit(0);
1269 
1270 	if (model != NULL)
1271 		newae(ctx->i_ae, model);
1272 	if (!nolibc)
1273 		newae(ctx->i_ae, "-lc");
1274 	if (!seen_o && (ctx->i_flags & CW_F_SHADOW)) {
1275 		newae(ctx->i_ae, "-o");
1276 		newae(ctx->i_ae, ctx->i_discard);
1277 	}
1278 }
1279 
1280 static void
1281 do_cc(cw_ictx_t *ctx)
1282 {
1283 	int in_output = 0, seen_o = 0;
1284 	cw_op_t op = CW_O_LINK;
1285 	char *nameflag;
1286 
1287 	if (ctx->i_flags & CW_F_PROG) {
1288 		newae(ctx->i_ae, "-V");
1289 		return;
1290 	}
1291 
1292 	if (asprintf(&nameflag, "-_%s=", ctx->i_compiler->c_name) == -1)
1293 		nomem();
1294 
1295 	while (--ctx->i_oldargc > 0) {
1296 		char *arg = *++ctx->i_oldargv;
1297 
1298 		if (strncmp(arg, "-_CC=", 5) == 0) {
1299 			newae(ctx->i_ae, strchr(arg, '=') + 1);
1300 			continue;
1301 		}
1302 
1303 		if (*arg != '-') {
1304 			if (in_output == 0 || !(ctx->i_flags & CW_F_SHADOW)) {
1305 				newae(ctx->i_ae, arg);
1306 			} else {
1307 				in_output = 0;
1308 				newae(ctx->i_ae, ctx->i_discard);
1309 			}
1310 			continue;
1311 		}
1312 		switch (*(arg + 1)) {
1313 		case '_':
1314 			if ((strncmp(arg, nameflag, strlen(nameflag)) == 0) ||
1315 			    (strncmp(arg, "-_cc=", 5) == 0) ||
1316 			    (strncmp(arg, "-_sun=", 6) == 0)) {
1317 				newae(ctx->i_ae, strchr(arg, '=') + 1);
1318 			}
1319 			break;
1320 
1321 		case 'V':
1322 			ctx->i_flags &= ~CW_F_ECHO;
1323 			newae(ctx->i_ae, arg);
1324 			break;
1325 		case 'o':
1326 			seen_o = 1;
1327 			if (strlen(arg) == 2) {
1328 				in_output = 1;
1329 				newae(ctx->i_ae, arg);
1330 			} else if (ctx->i_flags & CW_F_SHADOW) {
1331 				newae(ctx->i_ae, "-o");
1332 				newae(ctx->i_ae, ctx->i_discard);
1333 			} else {
1334 				newae(ctx->i_ae, arg);
1335 			}
1336 			break;
1337 		case 'c':
1338 		case 'S':
1339 			if (strlen(arg) == 2)
1340 				op = CW_O_COMPILE;
1341 			newae(ctx->i_ae, arg);
1342 			break;
1343 		case 'E':
1344 		case 'P':
1345 			if (strlen(arg) == 2)
1346 				op = CW_O_PREPROCESS;
1347 		/*FALLTHROUGH*/
1348 		default:
1349 			newae(ctx->i_ae, arg);
1350 		}
1351 	}
1352 
1353 	free(nameflag);
1354 
1355 	if ((op == CW_O_LINK || op == CW_O_PREPROCESS) &&
1356 	    (ctx->i_flags & CW_F_SHADOW))
1357 		exit(0);
1358 
1359 	if (!seen_o && (ctx->i_flags & CW_F_SHADOW)) {
1360 		newae(ctx->i_ae, "-o");
1361 		newae(ctx->i_ae, ctx->i_discard);
1362 	}
1363 }
1364 
1365 static void
1366 prepctx(cw_ictx_t *ctx)
1367 {
1368 	newae(ctx->i_ae, ctx->i_compiler->c_path);
1369 
1370 	if (ctx->i_flags & CW_F_PROG) {
1371 		(void) printf("%s: %s\n", (ctx->i_flags & CW_F_SHADOW) ?
1372 		    "shadow" : "primary", ctx->i_compiler->c_path);
1373 		(void) fflush(stdout);
1374 	}
1375 
1376 	if (!(ctx->i_flags & CW_F_XLATE))
1377 		return;
1378 
1379 	switch (ctx->i_compiler->c_style) {
1380 	case SUN:
1381 		do_cc(ctx);
1382 		break;
1383 	case GNU:
1384 		do_gcc(ctx);
1385 		break;
1386 	}
1387 }
1388 
1389 static int
1390 invoke(cw_ictx_t *ctx)
1391 {
1392 	char **newargv;
1393 	int ac;
1394 	struct ae *a;
1395 
1396 	if ((newargv = calloc(sizeof (*newargv), ctx->i_ae->ael_argc + 1)) ==
1397 	    NULL)
1398 		nomem();
1399 
1400 	if (ctx->i_flags & CW_F_ECHO)
1401 		(void) fprintf(stderr, "+ ");
1402 
1403 	for (ac = 0, a = ctx->i_ae->ael_head; a; a = a->ae_next, ac++) {
1404 		newargv[ac] = a->ae_arg;
1405 		if (ctx->i_flags & CW_F_ECHO)
1406 			(void) fprintf(stderr, "%s ", a->ae_arg);
1407 		if (a == ctx->i_ae->ael_tail)
1408 			break;
1409 	}
1410 
1411 	if (ctx->i_flags & CW_F_ECHO) {
1412 		(void) fprintf(stderr, "\n");
1413 		(void) fflush(stderr);
1414 	}
1415 
1416 	if (!(ctx->i_flags & CW_F_EXEC))
1417 		return (0);
1418 
1419 	/*
1420 	 * We must fix up the environment here so that the dependency files are
1421 	 * not trampled by the shadow compiler. Also take care of GCC
1422 	 * environment variables that will throw off gcc. This assumes a primary
1423 	 * gcc.
1424 	 */
1425 	if ((ctx->i_flags & CW_F_SHADOW) &&
1426 	    (unsetenv("SUNPRO_DEPENDENCIES") != 0 ||
1427 	    unsetenv("DEPENDENCIES_OUTPUT") != 0 ||
1428 	    unsetenv("GCC_ROOT") != 0)) {
1429 		(void) fprintf(stderr, "error: environment setup failed: %s\n",
1430 		    strerror(errno));
1431 		return (-1);
1432 	}
1433 
1434 	(void) execv(newargv[0], newargv);
1435 	warn("couldn't run %s", newargv[0]);
1436 
1437 	return (-1);
1438 }
1439 
1440 static int
1441 reap(cw_ictx_t *ctx)
1442 {
1443 	int status, ret = 0;
1444 	char buf[1024];
1445 	struct stat s;
1446 
1447 	/*
1448 	 * Only wait for one specific child.
1449 	 */
1450 	if (ctx->i_pid <= 0)
1451 		return (-1);
1452 
1453 	do {
1454 		if (waitpid(ctx->i_pid, &status, 0) < 0) {
1455 			warn("cannot reap child");
1456 			return (-1);
1457 		}
1458 		if (status != 0) {
1459 			if (WIFSIGNALED(status)) {
1460 				ret = -WTERMSIG(status);
1461 				break;
1462 			} else if (WIFEXITED(status)) {
1463 				ret = WEXITSTATUS(status);
1464 				break;
1465 			}
1466 		}
1467 	} while (!WIFEXITED(status) && !WIFSIGNALED(status));
1468 
1469 	(void) unlink(ctx->i_discard);
1470 
1471 	if (stat(ctx->i_stderr, &s) < 0) {
1472 		warn("stat failed on child cleanup");
1473 		return (-1);
1474 	}
1475 	if (s.st_size != 0) {
1476 		FILE *f;
1477 
1478 		if ((f = fopen(ctx->i_stderr, "r")) != NULL) {
1479 			while (fgets(buf, sizeof (buf), f))
1480 				(void) fprintf(stderr, "%s", buf);
1481 			(void) fflush(stderr);
1482 			(void) fclose(f);
1483 		}
1484 	}
1485 	(void) unlink(ctx->i_stderr);
1486 	free(ctx->i_stderr);
1487 
1488 	/*
1489 	 * cc returns an error code when given -V; we want that to succeed.
1490 	 */
1491 	if (ctx->i_flags & CW_F_PROG)
1492 		return (0);
1493 
1494 	return (ret);
1495 }
1496 
1497 static int
1498 exec_ctx(cw_ictx_t *ctx, int block)
1499 {
1500 	char *file;
1501 
1502 	/*
1503 	 * To avoid offending cc's sensibilities, the name of its output
1504 	 * file must end in '.o'.
1505 	 */
1506 	if ((file = tempnam(NULL, ".cw")) == NULL) {
1507 		nomem();
1508 		return (-1);
1509 	}
1510 	(void) strlcpy(ctx->i_discard, file, MAXPATHLEN);
1511 	(void) strlcat(ctx->i_discard, ".o", MAXPATHLEN);
1512 	free(file);
1513 
1514 	if ((ctx->i_stderr = tempnam(NULL, ".cw")) == NULL) {
1515 		nomem();
1516 		return (-1);
1517 	}
1518 
1519 	if ((ctx->i_pid = fork()) == 0) {
1520 		int fd;
1521 
1522 		(void) fclose(stderr);
1523 		if ((fd = open(ctx->i_stderr, O_WRONLY | O_CREAT | O_EXCL,
1524 		    0666)) < 0) {
1525 			err(1, "open failed for standard error");
1526 		}
1527 		if (dup2(fd, 2) < 0) {
1528 			err(1, "dup2 failed for standard error");
1529 		}
1530 		if (fd != 2)
1531 			(void) close(fd);
1532 		if (freopen("/dev/fd/2", "w", stderr) == NULL) {
1533 			err(1, "freopen failed for /dev/fd/2");
1534 		}
1535 
1536 		prepctx(ctx);
1537 		exit(invoke(ctx));
1538 	}
1539 
1540 	if (ctx->i_pid < 0) {
1541 		err(1, "fork failed");
1542 	}
1543 
1544 	if (block)
1545 		return (reap(ctx));
1546 
1547 	return (0);
1548 }
1549 
1550 static void
1551 parse_compiler(const char *spec, cw_compiler_t *compiler)
1552 {
1553 	char *tspec, *token;
1554 
1555 	if ((tspec = strdup(spec)) == NULL)
1556 		nomem();
1557 
1558 	if ((token = strsep(&tspec, ",")) == NULL)
1559 		errx(1, "Compiler is missing a name: %s", spec);
1560 	compiler->c_name = token;
1561 
1562 	if ((token = strsep(&tspec, ",")) == NULL)
1563 		errx(1, "Compiler is missing a path: %s", spec);
1564 	compiler->c_path = token;
1565 
1566 	if ((token = strsep(&tspec, ",")) == NULL)
1567 		errx(1, "Compiler is missing a style: %s", spec);
1568 
1569 	if ((strcasecmp(token, "gnu") == 0) ||
1570 	    (strcasecmp(token, "gcc") == 0))
1571 		compiler->c_style = GNU;
1572 	else if ((strcasecmp(token, "sun") == 0) ||
1573 	    (strcasecmp(token, "cc") == 0))
1574 		compiler->c_style = SUN;
1575 	else
1576 		errx(1, "unknown compiler style: %s", token);
1577 
1578 	if (tspec != NULL)
1579 		errx(1, "Excess tokens in compiler: %s", spec);
1580 }
1581 
1582 int
1583 main(int argc, char **argv)
1584 {
1585 	int ch;
1586 	cw_compiler_t primary = { NULL, NULL, 0 };
1587 	cw_compiler_t shadows[10];
1588 	int nshadows = 0;
1589 	int ret = 0;
1590 	boolean_t do_serial = B_FALSE;
1591 	boolean_t do_exec = B_FALSE;
1592 	boolean_t vflg = B_FALSE;
1593 	boolean_t Cflg = B_FALSE;
1594 	boolean_t cflg = B_FALSE;
1595 	boolean_t nflg = B_FALSE;
1596 
1597 	cw_ictx_t *main_ctx;
1598 
1599 	static struct option longopts[] = {
1600 		{ "compiler", no_argument, NULL, 'c' },
1601 		{ "noecho", no_argument, NULL, 'n' },
1602 		{ "primary", required_argument, NULL, 'p' },
1603 		{ "shadow", required_argument, NULL, 's' },
1604 		{ "versions", no_argument, NULL, 'v' },
1605 		{ NULL, 0, NULL, 0 },
1606 	};
1607 
1608 
1609 	if ((main_ctx = newictx()) == NULL)
1610 		nomem();
1611 
1612 	while ((ch = getopt_long(argc, argv, "C", longopts, NULL)) != -1) {
1613 		switch (ch) {
1614 		case 'c':
1615 			cflg = B_TRUE;
1616 			break;
1617 		case 'C':
1618 			Cflg = B_TRUE;
1619 			break;
1620 		case 'n':
1621 			nflg = B_TRUE;
1622 			break;
1623 		case 'p':
1624 			if (primary.c_path != NULL) {
1625 				warnx("Only one primary compiler may "
1626 				    "be specified");
1627 				usage();
1628 			}
1629 
1630 			parse_compiler(optarg, &primary);
1631 			break;
1632 		case 's':
1633 			if (nshadows >= 10)
1634 				errx(1, "May only use 10 shadows at "
1635 				    "the moment");
1636 			parse_compiler(optarg, &shadows[nshadows]);
1637 			nshadows++;
1638 			break;
1639 		case 'v':
1640 			vflg = B_TRUE;
1641 			break;
1642 		default:
1643 			(void) fprintf(stderr, "Did you forget '--'?\n");
1644 			usage();
1645 		}
1646 	}
1647 
1648 	if (primary.c_path == NULL) {
1649 		warnx("A primary compiler must be specified");
1650 		usage();
1651 	}
1652 
1653 	do_serial = (getenv("CW_SHADOW_SERIAL") == NULL) ? B_FALSE : B_TRUE;
1654 	do_exec = (getenv("CW_NO_EXEC") == NULL) ? B_TRUE : B_FALSE;
1655 
1656 	/* Leave room for argv[0] */
1657 	argc -= (optind - 1);
1658 	argv += (optind - 1);
1659 
1660 	main_ctx->i_oldargc = argc;
1661 	main_ctx->i_oldargv = argv;
1662 	main_ctx->i_flags = CW_F_XLATE;
1663 	if (nflg == 0)
1664 		main_ctx->i_flags |= CW_F_ECHO;
1665 	if (do_exec)
1666 		main_ctx->i_flags |= CW_F_EXEC;
1667 	if (Cflg)
1668 		main_ctx->i_flags |= CW_F_CXX;
1669 	main_ctx->i_compiler = &primary;
1670 
1671 	if (cflg) {
1672 		(void) fputs(primary.c_path, stdout);
1673 	}
1674 
1675 	if (vflg) {
1676 		(void) printf("cw version %s\n", CW_VERSION);
1677 		(void) fflush(stdout);
1678 		main_ctx->i_flags &= ~CW_F_ECHO;
1679 		main_ctx->i_flags |= CW_F_PROG | CW_F_EXEC;
1680 		do_serial = 1;
1681 	}
1682 
1683 	ret |= exec_ctx(main_ctx, do_serial);
1684 
1685 	for (int i = 0; i < nshadows; i++) {
1686 		int r;
1687 		cw_ictx_t *shadow_ctx;
1688 
1689 		if ((shadow_ctx = newictx()) == NULL)
1690 			nomem();
1691 
1692 		memcpy(shadow_ctx, main_ctx, sizeof (cw_ictx_t));
1693 
1694 		shadow_ctx->i_flags |= CW_F_SHADOW;
1695 		shadow_ctx->i_compiler = &shadows[i];
1696 
1697 		r = exec_ctx(shadow_ctx, do_serial);
1698 		if (r == 0) {
1699 			shadow_ctx->i_next = main_ctx->i_next;
1700 			main_ctx->i_next = shadow_ctx;
1701 		}
1702 		ret |= r;
1703 	}
1704 
1705 	if (!do_serial) {
1706 		cw_ictx_t *next = main_ctx;
1707 		while (next != NULL) {
1708 			cw_ictx_t *toreap = next;
1709 			next = next->i_next;
1710 			ret |= reap(toreap);
1711 		}
1712 	}
1713 
1714 	return (ret);
1715 }
1716