xref: /titanic_44/usr/src/tools/cw/cw.c (revision 18c2aff776a775d34a4c9893a4c72e0434d68e36)
1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License (the "License").
6  * You may not use this file except in compliance with the License.
7  *
8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9  * or http://www.opensolaris.org/os/licensing.
10  * See the License for the specific language governing permissions
11  * and limitations under the License.
12  *
13  * When distributing Covered Code, include this CDDL HEADER in each
14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15  * If applicable, add the following below this CDDL HEADER, with the
16  * fields enclosed by brackets "[]" replaced with your own identifying
17  * information: Portions Copyright [yyyy] [name of copyright owner]
18  *
19  * CDDL HEADER END
20  */
21 
22 /*
23  * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
24  * Use is subject to license terms.
25  */
26 
27 #pragma ident	"%Z%%M%	%I%	%E% SMI"
28 
29 /*
30  * Wrapper for the GNU C compiler to make it accept the Sun C compiler
31  * arguments where possible.
32  *
33  * Since the translation is inexact, this is something of a work-in-progress.
34  */
35 
36 /*
37  * -#		Verbose mode
38  * -###		Show compiler commands built by driver, no compilation
39  * -A<name[(tokens)]>	Preprocessor predicate assertion
40  * -B<[static|dynamic]>	Specify dynamic or static binding
41  * -C		Prevent preprocessor from removing comments
42  * -c		Compile only - produce .o files, suppress linking
43  * -cg92	Alias for -xtarget=ss1000
44  * -D<name[=token]>	Associate name with token as if by #define
45  * -d[y|n]	dynamic [-dy] or static [-dn] option to linker
46  * -E		Compile source through preprocessor only, output to stdout
47  * -erroff=<t>	Suppress warnings specified by tags t(%none, %all, <tag list>)
48  * -errtags=<a>	Display messages with tags a(no, yes)
49  * -errwarn=<t>	Treats warnings specified by tags t(%none, %all, <tag list>)
50  *		as errors
51  * -fast	Optimize using a selection of options
52  * -fd		Report old-style function definitions and declarations
53  * -flags	Show this summary of compiler options
54  * -fnonstd	Initialize floating-point hardware to non-standard preferences
55  * -fns[=<yes|no>] Select non-standard floating point mode
56  * -fprecision=<p> Set FP rounding precision mode p(single, double, extended)
57  * -fround=<r>	Select the IEEE rounding mode in effect at startup
58  * -fsimple[=<n>] Select floating-point optimization preferences <n>
59  * -fsingle	Use single-precision arithmetic (-Xt and -Xs modes only)
60  * -ftrap=<t>	Select floating-point trapping mode in effect at startup
61  * -fstore	force floating pt. values to target precision on assignment
62  * -G		Build a dynamic shared library
63  * -g		Compile for debugging
64  * -H		Print path name of each file included during compilation
65  * -h <name>	Assign <name> to generated dynamic shared library
66  * -I<dir>	Add <dir> to preprocessor #include file search path
67  * -i		Passed to linker to ignore any LD_LIBRARY_PATH setting
68  * -keeptmp	Keep temporary files created during compilation
69  * -KPIC	Compile position independent code with 32-bit addresses
70  * -Kpic	Compile position independent code
71  * -L<dir>	Pass to linker to add <dir> to the library search path
72  * -l<name>	Link with library lib<name>.a or lib<name>.so
73  * -mc		Remove duplicate strings from .comment section of output files
74  * -mr		Remove all strings from .comment section of output files
75  * -mr,"string"	Remove all strings and append "string" to .comment section
76  * -mt		Specify options needed when compiling multi-threaded code
77  * -native	Find available processor, generate code accordingly
78  * -nofstore	Do not force floating pt. values to target precision
79  *		on assignment
80  * -nolib	Same as -xnolib
81  * -noqueue	Disable queuing of compiler license requests
82  * -norunpath	Do not build in a runtime path for shared libraries
83  * -O		Use default optimization level (-xO2 or -xO3. Check man page.)
84  * -o <outputfile> Set name of output file to <outputfile>
85  * -P		Compile source through preprocessor only, output to .i  file
86  * -PIC		Alias for -KPIC or -xcode=pic32
87  * -p		Compile for profiling with prof
88  * -pic		Alias for -Kpic or -xcode=pic13
89  * -Q[y|n]	Emit/don't emit identification info to output file
90  * -qp		Compile for profiling with prof
91  * -R<dir[:dir]> Build runtime search path list into executable
92  * -S		Compile and only generate assembly code (.s)
93  * -s		Strip symbol table from the executable file
94  * -t		Turn off duplicate symbol warnings when linking
95  * -U<name>	Delete initial definition of preprocessor symbol <name>
96  * -V		Report version number of each compilation phase
97  * -v		Do stricter semantic checking
98  * -W<c>,<arg>	Pass <arg> to specified component <c> (a,l,m,p,0,2,h,i,u)
99  * -w		Suppress compiler warning messages
100  * -Xa		Compile assuming ANSI C conformance, allow K & R extensions
101  *		(default mode)
102  * -Xc		Compile assuming strict ANSI C conformance
103  * -Xs		Compile assuming (pre-ANSI) K & R C style code
104  * -Xt		Compile assuming K & R conformance, allow ANSI C
105  * -x386	Generate code for the 80386 processor
106  * -x486	Generate code for the 80486 processor
107  * -xarch=<a>	Specify target architecture instruction set
108  * -xbuiltin[=<b>] When profitable inline, or substitute intrinisic functions
109  *		for system functions, b={%all,%none}
110  * -xCC		Accept C++ style comments
111  * -xchar_byte_order=<o> Specify multi-char byte order <o> (default, high, low)
112  * -xchip=<c>	Specify the target processor for use by the optimizer
113  * -xcode=<c>	Generate different code for forming addresses
114  * -xcrossfile[=<n>] Enable optimization and inlining across source files,
115  *		n={0|1}
116  * -xe		Perform only syntax/semantic checking, no code generation
117  * -xF		Compile for later mapfile reordering
118  * -xhelp=<f>	Display on-line help information f(flags, readme, errors)
119  * -xildoff	Cancel -xildon
120  * -xildon	Enable use of the incremental linker, ild
121  * -xinline=[<a>,...,<a>]  Attempt inlining of specified user routines,
122  *		<a>={%auto,func,no%func}
123  * -xlibmieee	Force IEEE 754 return values for math routines in
124  *		exceptional cases
125  * -xlibmil	Inline selected libm math routines for optimization
126  * -xlic_lib=sunperf	Link in the Sun supplied performance libraries
127  * -xlicinfo	Show license server information
128  * -xM		Generate makefile dependencies
129  * -xM1		Generate makefile dependencies, but exclude /usr/include
130  * -xmaxopt=[off,1,2,3,4,5] maximum optimization level allowed on #pragma opt
131  * -xnolib	Do not link with default system libraries
132  * -xnolibmil	Cancel -xlibmil on command line
133  * -xO<n>	Generate optimized code (n={1|2|3|4|5})
134  * -xP		Print prototypes for function definitions
135  * -xpentium	Generate code for the pentium processor
136  * -xpg		Compile for profiling with gprof
137  * -xprofile=<p> Collect data for a profile or use a profile to optimize
138  *		<p>={{collect,use}[:<path>],tcov}
139  * -xregs=<r>	Control register allocation
140  * -xs		Allow debugging without object (.o) files
141  * -xsb		Compile for use with the WorkShop source browser
142  * -xsbfast	Generate only WorkShop source browser info, no compilation
143  * -xsfpconst	Represent unsuffixed floating point constants as single
144  *		precision
145  * -xspace	Do not do optimizations that increase code size
146  * -xstrconst	Place string literals into read-only data segment
147  * -xtarget=<t>	Specify target system for optimization
148  * -xtemp=<dir>	Set directory for temporary files to <dir>
149  * -xtime	Report the execution time for each compilation phase
150  * -xtransition	Emit warnings for differences between K&R C and ANSI C
151  * -xtrigraphs[=<yes|no>] Enable|disable trigraph translation
152  * -xunroll=n	Enable unrolling loops n times where possible
153  * -Y<c>,<dir>	Specify <dir> for location of component <c> (a,l,m,p,0,h,i,u)
154  * -YA,<dir>	Change default directory searched for components
155  * -YI,<dir>	Change default directory searched for include files
156  * -YP,<dir>	Change default directory for finding libraries files
157  * -YS,<dir>	Change default directory for startup object files
158  */
159 
160 /*
161  * Translation table:
162  */
163 /*
164  * -#				-v
165  * -###				error
166  * -A<name[(tokens)]>		pass-thru
167  * -B<[static|dynamic]>		pass-thru (syntax error for anything else)
168  * -C				pass-thru
169  * -c				pass-thru
170  * -cg92			-m32 -mcpu=v8 -mtune=supersparc (SPARC only)
171  * -D<name[=token]>		pass-thru
172  * -dy or -dn			-Wl,-dy or -Wl,-dn
173  * -E				pass-thru
174  * -erroff=E_EMPTY_TRANSLATION_UNIT ignore
175  * -errtags=%all		-Wall
176  * -errwarn=%all		-Werror else -Wno-error
177  * -fast			error
178  * -fd				error
179  * -flags			--help
180  * -fnonstd			error
181  * -fns[=<yes|no>]		error
182  * -fprecision=<p>		error
183  * -fround=<r>			error
184  * -fsimple[=<n>]		error
185  * -fsingle[=<n>]		error
186  * -ftrap=<t>			error
187  * -fstore			error
188  * -G				pass-thru
189  * -g				pass-thru
190  * -H				pass-thru
191  * -h <name>			pass-thru
192  * -I<dir>			pass-thru
193  * -i				pass-thru
194  * -keeptmp			-save-temps
195  * -KPIC			-fPIC
196  * -Kpic			-fpic
197  * -L<dir>			pass-thru
198  * -l<name>			pass-thru
199  * -mc				error
200  * -mr				error
201  * -mr,"string"			error
202  * -mt				-D_REENTRANT
203  * -native			error
204  * -nofstore			error
205  * -nolib			-nodefaultlibs
206  * -noqueue			ignore
207  * -norunpath			ignore
208  * -O				-O1 (Check the man page to be certain)
209  * -o <outputfile>		pass-thru
210  * -P				-E -o filename.i (or error)
211  * -PIC				-fPIC (C++ only)
212  * -p				pass-thru
213  * -pic				-fpic (C++ only)
214  * -Q[y|n]			error
215  * -qp				-p
216  * -R<dir[:dir]>		pass-thru
217  * -S				pass-thru
218  * -s				-Wl,-s
219  * -t				-Wl,-t
220  * -U<name>			pass-thru
221  * -V				--version
222  * -v				-Wall
223  * -Wa,<arg>			pass-thru
224  * -Wp,<arg>			pass-thru except -xc99=<a>
225  * -Wl,<arg>			pass-thru
226  * -W{m,0,2,h,i,u>		error/ignore
227  * -Wu,-xmodel=kernel		-ffreestanding -mcmodel=kernel -mno-red-zone
228  * -xmodel=kernel		-ffreestanding -mcmodel=kernel -mno-red-zone
229  * -Wu,-save_args		-msave-args
230  * -w				pass-thru
231  * -Xa				-std=iso9899:199409 or -ansi
232  * -Xc				-ansi -pedantic
233  * -Xt				error
234  * -Xs				-traditional -std=c89
235  * -x386			-march=i386 (x86 only)
236  * -x486			-march=i486 (x86 only)
237  * -xarch=<a>			table
238  * -xbuiltin[=<b>]		-fbuiltin (-fno-builtin otherwise)
239  * -xCC				ignore
240  * -xchar_byte_order=<o>	error
241  * -xchip=<c>			table
242  * -xcode=<c>			table
243  * -xdebugformat=<format>	ignore (always use dwarf-2 for gcc)
244  * -xcrossfile[=<n>]		ignore
245  * -xe				error
246  * -xF				error
247  * -xhelp=<f>			error
248  * -xildoff			ignore
249  * -xildon			ignore
250  * -xinline			ignore
251  * -xlibmieee			error
252  * -xlibmil			error
253  * -xlic_lib=sunperf		error
254  * -xM				-M
255  * -xM1				-MM
256  * -xmaxopt=[...]		error
257  * -xnolib			-nodefaultlibs
258  * -xnolibmil			error
259  * -xO<n>			-O<n>
260  * -xP				error
261  * -xpentium			-march=pentium (x86 only)
262  * -xpg				error
263  * -xprofile=<p>		error
264  * -xregs=<r>			table
265  * -xs				error
266  * -xsb				error
267  * -xsbfast			error
268  * -xsfpconst			error
269  * -xspace			ignore (-not -Os)
270  * -xstrconst			ignore
271  * -xtarget=<t>			table
272  * -xtemp=<dir>			error
273  * -xtime			error
274  * -xtransition			-Wtransition
275  * -xtrigraphs=<yes|no>		-trigraphs -notrigraphs
276  * -xunroll=n			error
277  * -W0,-xdbggen=no%usedonly	-fno-eliminate-unused-debug-symbols
278  *				-fno-eliminate-unused-debug-types
279  * -Y<c>,<dir>			error
280  * -YA,<dir>			error
281  * -YI,<dir>			-nostdinc -I<dir>
282  * -YP,<dir>			error
283  * -YS,<dir>			error
284  */
285 
286 #include <stdio.h>
287 #include <sys/types.h>
288 #include <unistd.h>
289 #include <string.h>
290 #include <stdlib.h>
291 #include <ctype.h>
292 #include <fcntl.h>
293 #include <errno.h>
294 #include <stdarg.h>
295 #include <sys/utsname.h>
296 #include <sys/param.h>
297 #include <sys/isa_defs.h>
298 #include <sys/wait.h>
299 #include <sys/stat.h>
300 
301 #define	CW_F_CXX	0x01
302 #define	CW_F_SHADOW	0x02
303 #define	CW_F_EXEC	0x04
304 #define	CW_F_ECHO	0x08
305 #define	CW_F_XLATE	0x10
306 #define	CW_F_PROG	0x20
307 
308 typedef enum cw_compiler {
309 	CW_C_CC = 0,
310 	CW_C_GCC
311 } cw_compiler_t;
312 
313 static const char *cmds[] = {
314 	"cc", "CC",
315 	"gcc", "g++"
316 };
317 
318 static const char *dirs[] = {
319 	DEFAULT_CC_DIR, DEFAULT_CPLUSPLUS_DIR,
320 	DEFAULT_GCC_DIR, DEFAULT_GPLUSPLUS_DIR
321 };
322 
323 #define	CC(ctx) \
324 	(((ctx)->i_flags & CW_F_SHADOW) ? \
325 	    ((ctx)->i_compiler == CW_C_CC ? CW_C_GCC : CW_C_CC) : \
326 	    (ctx)->i_compiler)
327 
328 #define	CIDX(compiler, flags)	\
329 	((int)(compiler) << 1) + ((flags) & CW_F_CXX ? 1 : 0)
330 
331 typedef enum cw_op {
332 	CW_O_NONE = 0,
333 	CW_O_PREPROCESS,
334 	CW_O_COMPILE,
335 	CW_O_LINK
336 } cw_op_t;
337 
338 struct aelist {
339 	struct ae {
340 		struct ae *ae_next;
341 		char *ae_arg;
342 	} *ael_head, *ael_tail;
343 	int ael_argc;
344 };
345 
346 typedef struct cw_ictx {
347 	cw_compiler_t	i_compiler;
348 	struct aelist	*i_ae;
349 	uint32_t	i_flags;
350 	int		i_oldargc;
351 	char		**i_oldargv;
352 	pid_t		i_pid;
353 	char		i_discard[MAXPATHLEN];
354 	char		*i_stderr;
355 } cw_ictx_t;
356 
357 static const char *progname;
358 
359 static const char *xarch_tbl[] = {
360 #if defined(__x86)
361 	"generic",	NULL,
362 	"generic64",	"-m64", "-mtune=opteron", NULL,
363 	"amd64",	"-m64", "-mtune=opteron", NULL,
364 	"386",		"-march=i386", NULL,
365 	"pentium_pro",	"-march=pentiumpro", NULL,
366 #elif defined(__sparc)
367 	"generic",	"-m32", "-mcpu=v8", NULL,
368 	"generic64",	"-m64", "-mcpu=v9", NULL,
369 	"v8",		"-m32", "-mcpu=v8", "-mno-v8plus", NULL,
370 	"v8plus",	"-m32", "-mcpu=v9", "-mv8plus", NULL,
371 	"v8plusa",	"-m32", "-mcpu=ultrasparc", "-mv8plus", "-mvis", NULL,
372 	"v8plusb",	"-m32", "-mcpu=ultrasparc3", "-mv8plus", "-mvis", NULL,
373 	"v9",		"-m64", "-mcpu=v9", NULL,
374 	"v9a",		"-m64", "-mcpu=ultrasparc", "-mvis", NULL,
375 	"v9b",		"-m64", "-mcpu=ultrasparc3", "-mvis", NULL,
376 #endif
377 	NULL,		NULL
378 };
379 
380 static const char *xchip_tbl[] = {
381 #if defined(__x86)
382 	"386",		"-mtune=i386", NULL,
383 	"486",		"-mtune=i486", NULL,
384 	"pentium",	"-mtune=pentium", NULL,
385 	"pentium_pro",  "-mtune=pentiumpro", NULL,
386 #elif defined(__sparc)
387 	"super",	"-mtune=supersparc", NULL,
388 	"ultra",	"-mtune=ultrasparc", NULL,
389 	"ultra3",	"-mtune=ultrasparc3", NULL,
390 #endif
391 	NULL,		NULL
392 };
393 
394 static const char *xcode_tbl[] = {
395 #if defined(__sparc)
396 	"abs32",	"-fno-pic", "-mcmodel=medlow", NULL,
397 	"abs44",	"-fno-pic", "-mcmodel=medmid", NULL,
398 	"abs64",	"-fno-pic", "-mcmodel=medany", NULL,
399 	"pic13",	"-fpic", NULL,
400 	"pic32",	"-fPIC", NULL,
401 #endif
402 	NULL,		NULL
403 };
404 
405 static const char *xtarget_tbl[] = {
406 #if defined(__x86)
407 	"pentium_pro",	"-march=pentiumpro", NULL,
408 #endif	/* __x86 */
409 	NULL,		NULL
410 };
411 
412 static const char *xregs_tbl[] = {
413 #if defined(__sparc)
414 	"appl",		"-mapp-regs", NULL,
415 	"no%appl",	"-mno-app-regs", NULL,
416 	"float",	"-mfpu", NULL,
417 	"no%float",	"-mno-fpu", NULL,
418 #endif	/* __sparc */
419 	NULL,		NULL
420 };
421 
422 static void
423 nomem(void)
424 {
425 	(void) fprintf(stderr, "%s: error: out of memory\n", progname);
426 	exit(1);
427 }
428 
429 static void
430 cw_perror(const char *fmt, ...)
431 {
432 	va_list ap;
433 	int saved_errno = errno;
434 
435 	(void) fprintf(stderr, "%s: error: ", progname);
436 
437 	va_start(ap, fmt);
438 	(void) vfprintf(stderr, fmt, ap);
439 	va_end(ap);
440 
441 	(void) fprintf(stderr, " (%s)\n", strerror(saved_errno));
442 }
443 
444 static void
445 newae(struct aelist *ael, const char *arg)
446 {
447 	struct ae *ae;
448 
449 	if ((ae = calloc(sizeof (*ae), 1)) == NULL)
450 		nomem();
451 	ae->ae_arg = strdup(arg);
452 	if (ael->ael_tail == NULL)
453 		ael->ael_head = ae;
454 	else
455 		ael->ael_tail->ae_next = ae;
456 	ael->ael_tail = ae;
457 	ael->ael_argc++;
458 }
459 
460 static cw_ictx_t *
461 newictx(void)
462 {
463 	cw_ictx_t *ctx = calloc(sizeof (cw_ictx_t), 1);
464 	if (ctx)
465 		if ((ctx->i_ae = calloc(sizeof (struct aelist), 1)) == NULL) {
466 			free(ctx);
467 			return (NULL);
468 		}
469 
470 	return (ctx);
471 }
472 
473 static void
474 error(const char *arg)
475 {
476 	(void) fprintf(stderr,
477 	    "%s: error: mapping failed at or near arg '%s'\n", progname, arg);
478 	exit(2);
479 }
480 
481 /*
482  * Add the current favourite set of warnings to the gcc invocation.
483  */
484 static void
485 warnings(struct aelist *h)
486 {
487 	static int warningsonce;
488 
489 	if (warningsonce++)
490 		return;
491 
492 	newae(h, "-Wall");
493 	newae(h, "-Wno-unknown-pragmas");
494 	newae(h, "-Wno-missing-braces");
495 	newae(h, "-Wno-sign-compare");
496 	newae(h, "-Wno-parentheses");
497 	newae(h, "-Wno-uninitialized");
498 	newae(h, "-Wno-implicit-function-declaration");
499 	newae(h, "-Wno-unused");
500 	newae(h, "-Wno-trigraphs");
501 	newae(h, "-Wno-char-subscripts");
502 	newae(h, "-Wno-switch");
503 }
504 
505 static void
506 optim_disable(struct aelist *h, int level)
507 {
508 	if (level >= 2) {
509 		newae(h, "-fno-strict-aliasing");
510 		newae(h, "-fno-unit-at-a-time");
511 		newae(h, "-fno-optimize-sibling-calls");
512 	}
513 }
514 
515 /* ARGSUSED */
516 static void
517 Xamode(struct aelist *h)
518 {
519 }
520 
521 static void
522 Xcmode(struct aelist *h)
523 {
524 	static int xconce;
525 
526 	if (xconce++)
527 		return;
528 
529 	newae(h, "-ansi");
530 	newae(h, "-pedantic-errors");
531 }
532 
533 static void
534 Xsmode(struct aelist *h)
535 {
536 	static int xsonce;
537 
538 	if (xsonce++)
539 		return;
540 
541 	newae(h, "-traditional");
542 	newae(h, "-traditional-cpp");
543 }
544 
545 static void
546 usage()
547 {
548 	(void) fprintf(stderr,
549 	    "usage: %s { -_cc | -_gcc | -_CC | -_g++ } [ -_compiler | ... ]\n",
550 	    progname);
551 	exit(2);
552 }
553 
554 static void
555 xlate(struct aelist *h, const char *xarg, const char **table)
556 {
557 	while (*table != NULL && strcmp(xarg, *table) != 0) {
558 		while (*table != NULL)
559 			table++;
560 		table++;
561 	}
562 
563 	if (*table == NULL)
564 		error(xarg);
565 
566 	table++;
567 
568 	while (*table != NULL) {
569 		newae(h, *table);
570 		table++;
571 	}
572 }
573 
574 static void
575 do_gcc(cw_ictx_t *ctx)
576 {
577 	int c;
578 	int pic = 0, nolibc = 0;
579 	int in_output = 0, seen_o = 0, c_files = 0;
580 	cw_op_t op = CW_O_LINK;
581 	char *model = NULL;
582 
583 	if (ctx->i_flags & CW_F_PROG) {
584 		newae(ctx->i_ae, "--version");
585 		return;
586 	}
587 
588 	newae(ctx->i_ae, "-fident");
589 	newae(ctx->i_ae, "-finline");
590 	newae(ctx->i_ae, "-fno-inline-functions");
591 	newae(ctx->i_ae, "-fno-builtin");
592 	newae(ctx->i_ae, "-fno-asm");
593 	newae(ctx->i_ae, "-nodefaultlibs");
594 
595 #if defined(__sparc)
596 	/*
597 	 * The SPARC ldd and std instructions require 8-byte alignment of
598 	 * their address operand.  gcc correctly uses them only when the
599 	 * ABI requires 8-byte alignment; unfortunately we have a number of
600 	 * pieces of buggy code that doesn't conform to the ABI.  This
601 	 * flag makes gcc work more like Studio with -xmemalign=4.
602 	 */
603 	newae(ctx->i_ae, "-mno-integer-ldd-std");
604 #endif
605 
606 	/*
607 	 * This is needed because 'u' is defined
608 	 * under a conditional on 'sun'.  Should
609 	 * probably just remove the conditional,
610 	 * or make it be dependent on '__sun'.
611 	 *
612 	 * -Dunix is also missing in enhanced ANSI mode
613 	 */
614 	newae(ctx->i_ae, "-D__sun");
615 
616 	/*
617 	 * Walk the argument list, translating as we go ..
618 	 */
619 
620 	while (--ctx->i_oldargc > 0) {
621 		char *arg = *++ctx->i_oldargv;
622 		size_t arglen = strlen(arg);
623 
624 		if (*arg == '-') {
625 			arglen--;
626 		} else {
627 			/*
628 			 * Discard inline files that gcc doesn't grok
629 			 */
630 			if (!in_output && arglen > 3 &&
631 			    strcmp(arg + arglen - 3, ".il") == 0)
632 				continue;
633 
634 			if (!in_output && arglen > 2 &&
635 			    arg[arglen - 2] == '.' &&
636 			    (arg[arglen - 1] == 'S' || arg[arglen - 1] == 's' ||
637 			    arg[arglen - 1] == 'c' || arg[arglen - 1] == 'i'))
638 				c_files++;
639 
640 			/*
641 			 * Otherwise, filenames and partial arguments
642 			 * are passed through for gcc to chew on.  However,
643 			 * output is always discarded for the secondary
644 			 * compiler.
645 			 */
646 			if ((ctx->i_flags & CW_F_SHADOW) && in_output)
647 				newae(ctx->i_ae, ctx->i_discard);
648 			else
649 				newae(ctx->i_ae, arg);
650 			in_output = 0;
651 			continue;
652 		}
653 
654 		if (ctx->i_flags & CW_F_CXX) {
655 			if (strncmp(arg, "-compat=", 8) == 0) {
656 				/* discard -compat=4 and -compat=5 */
657 				continue;
658 			}
659 			if (strcmp(arg, "-Qoption") == 0) {
660 				/* discard -Qoption and its two arguments */
661 				if (ctx->i_oldargc < 3)
662 					error(arg);
663 				ctx->i_oldargc -= 2;
664 				ctx->i_oldargv += 2;
665 				continue;
666 			}
667 			if (strcmp(arg, "-xwe") == 0) {
668 				/* turn warnings into errors */
669 				newae(ctx->i_ae, "-Werror");
670 				continue;
671 			}
672 			if (strcmp(arg, "-noex") == 0) {
673 				/* no exceptions */
674 				newae(ctx->i_ae, "-fno-exceptions");
675 				/* no run time type descriptor information */
676 				newae(ctx->i_ae, "-fno-rtti");
677 				continue;
678 			}
679 			if (strcmp(arg, "-pic") == 0) {
680 				newae(ctx->i_ae, "-fpic");
681 				pic = 1;
682 				continue;
683 			}
684 			if (strcmp(arg, "-PIC") == 0) {
685 				newae(ctx->i_ae, "-fPIC");
686 				pic = 1;
687 				continue;
688 			}
689 			if (strcmp(arg, "-norunpath") == 0) {
690 				/* gcc has no corresponding option */
691 				continue;
692 			}
693 			if (strcmp(arg, "-nolib") == 0) {
694 				/* -nodefaultlibs is on by default */
695 				nolibc = 1;
696 				continue;
697 			}
698 #if defined(__sparc)
699 			if (strcmp(arg, "-cg92") == 0) {
700 				xlate(ctx->i_ae, "v8", xarch_tbl);
701 				xlate(ctx->i_ae, "super", xchip_tbl);
702 				continue;
703 			}
704 #endif	/* __sparc */
705 		}
706 
707 		switch ((c = arg[1])) {
708 		case '_':
709 			if (strcmp(arg, "-_noecho") == 0)
710 				ctx->i_flags &= ~CW_F_ECHO;
711 			else if (strncmp(arg, "-_cc=", 5) == 0 ||
712 			    strncmp(arg, "-_CC=", 5) == 0)
713 				/* EMPTY */;
714 			else if (strncmp(arg, "-_gcc=", 6) == 0 ||
715 			    strncmp(arg, "-_g++=", 6) == 0)
716 				newae(ctx->i_ae, arg + 6);
717 			else
718 				error(arg);
719 			break;
720 		case '#':
721 			if (arglen == 1) {
722 				newae(ctx->i_ae, "-v");
723 				break;
724 			}
725 			error(arg);
726 			break;
727 		case 'g':
728 			newae(ctx->i_ae, "-gdwarf-2");
729 			break;
730 		case 'E':
731 			if (arglen == 1) {
732 				newae(ctx->i_ae, "-xc");
733 				newae(ctx->i_ae, arg);
734 				op = CW_O_PREPROCESS;
735 				nolibc = 1;
736 				break;
737 			}
738 			error(arg);
739 			break;
740 		case 'c':
741 		case 'S':
742 			if (arglen == 1) {
743 				op = CW_O_COMPILE;
744 				nolibc = 1;
745 			}
746 			/* FALLTHROUGH */
747 		case 'C':
748 		case 'H':
749 		case 'p':
750 			if (arglen == 1) {
751 				newae(ctx->i_ae, arg);
752 				break;
753 			}
754 			error(arg);
755 			break;
756 		case 'A':
757 		case 'h':
758 		case 'I':
759 		case 'i':
760 		case 'L':
761 		case 'l':
762 		case 'R':
763 		case 'U':
764 		case 'u':
765 		case 'w':
766 			newae(ctx->i_ae, arg);
767 			break;
768 		case 'o':
769 			seen_o = 1;
770 			if (arglen == 1) {
771 				in_output = 1;
772 				newae(ctx->i_ae, arg);
773 			} else if (ctx->i_flags & CW_F_SHADOW) {
774 				newae(ctx->i_ae, "-o");
775 				newae(ctx->i_ae, ctx->i_discard);
776 			} else {
777 				newae(ctx->i_ae, arg);
778 			}
779 			break;
780 		case 'D':
781 			newae(ctx->i_ae, arg);
782 			/*
783 			 * XXX	Clearly a hack ... do we need _KADB too?
784 			 */
785 			if (strcmp(arg, "-D_KERNEL") == 0 ||
786 			    strcmp(arg, "-D_BOOT") == 0)
787 				newae(ctx->i_ae, "-ffreestanding");
788 			break;
789 		case 'd':
790 			if (arglen == 2) {
791 				if (strcmp(arg, "-dy") == 0) {
792 					newae(ctx->i_ae, "-Wl,-dy");
793 					break;
794 				}
795 				if (strcmp(arg, "-dn") == 0) {
796 					newae(ctx->i_ae, "-Wl,-dn");
797 					break;
798 				}
799 			}
800 			if (strcmp(arg, "-dalign") == 0) {
801 				/*
802 				 * -dalign forces alignment in some cases;
803 				 * gcc does not need any flag to do this.
804 				 */
805 				break;
806 			}
807 			error(arg);
808 			break;
809 		case 'e':
810 			if (strcmp(arg,
811 			    "-erroff=E_EMPTY_TRANSLATION_UNIT") == 0) {
812 				/*
813 				 * Accept but ignore this -- gcc doesn't
814 				 * seem to complain about empty translation
815 				 * units
816 				 */
817 				break;
818 			}
819 			/* XX64 -- ignore all -erroff= options, for now */
820 			if (strncmp(arg, "-erroff=", 8) == 0)
821 				break;
822 			if (strcmp(arg, "-errtags=yes") == 0) {
823 				warnings(ctx->i_ae);
824 				break;
825 			}
826 			if (strcmp(arg, "-errwarn=%all") == 0) {
827 				newae(ctx->i_ae, "-Werror");
828 				break;
829 			}
830 			error(arg);
831 			break;
832 		case 'f':
833 			if (strcmp(arg, "-flags") == 0) {
834 				newae(ctx->i_ae, "--help");
835 				break;
836 			}
837 			error(arg);
838 			break;
839 		case 'G':
840 			newae(ctx->i_ae, "-shared");
841 			nolibc = 1;
842 			break;
843 		case 'k':
844 			if (strcmp(arg, "-keeptmp") == 0) {
845 				newae(ctx->i_ae, "-save-temps");
846 				break;
847 			}
848 			error(arg);
849 			break;
850 		case 'K':
851 			if (arglen == 1) {
852 				if ((arg = *++ctx->i_oldargv) == NULL ||
853 				    *arg == '\0')
854 					error("-K");
855 				ctx->i_oldargc--;
856 			} else {
857 				arg += 2;
858 			}
859 			if (strcmp(arg, "pic") == 0) {
860 				newae(ctx->i_ae, "-fpic");
861 				pic = 1;
862 				break;
863 			}
864 			if (strcmp(arg, "PIC") == 0) {
865 				newae(ctx->i_ae, "-fPIC");
866 				pic = 1;
867 				break;
868 			}
869 			error("-K");
870 			break;
871 		case 'm':
872 			if (strcmp(arg, "-mt") == 0) {
873 				newae(ctx->i_ae, "-D_REENTRANT");
874 				break;
875 			}
876 			error(arg);
877 			break;
878 		case 'B':	/* linker options */
879 		case 'M':
880 		case 'z':
881 			{
882 				char *opt;
883 				size_t len;
884 				char *s;
885 
886 				if (arglen == 1) {
887 					opt = *++ctx->i_oldargv;
888 					if (opt == NULL || *opt == '\0')
889 						error(arg);
890 					ctx->i_oldargc--;
891 				} else {
892 					opt = arg + 2;
893 				}
894 				len = strlen(opt) + 7;
895 				if ((s = malloc(len)) == NULL)
896 					nomem();
897 				(void) snprintf(s, len, "-Wl,-%c%s", c, opt);
898 				newae(ctx->i_ae, s);
899 				free(s);
900 			}
901 			break;
902 		case 'n':
903 			if (strcmp(arg, "-noqueue") == 0) {
904 				/*
905 				 * Horrid license server stuff - n/a
906 				 */
907 				break;
908 			}
909 			error(arg);
910 			break;
911 		case 'O':
912 			if (arglen == 1) {
913 				newae(ctx->i_ae, "-O");
914 				break;
915 			}
916 			error(arg);
917 			break;
918 		case 'P':
919 			/*
920 			 * We could do '-E -o filename.i', but that's hard,
921 			 * and we don't need it for the case that's triggering
922 			 * this addition.  We'll require the user to specify
923 			 * -o in the Makefile.  If they don't they'll find out
924 			 * in a hurry.
925 			 */
926 			newae(ctx->i_ae, "-E");
927 			op = CW_O_PREPROCESS;
928 			nolibc = 1;
929 			break;
930 		case 'q':
931 			if (strcmp(arg, "-qp") == 0) {
932 				newae(ctx->i_ae, "-p");
933 				break;
934 			}
935 			error(arg);
936 			break;
937 		case 's':
938 			if (arglen == 1) {
939 				newae(ctx->i_ae, "-Wl,-s");
940 				break;
941 			}
942 			error(arg);
943 			break;
944 		case 't':
945 			if (arglen == 1) {
946 				newae(ctx->i_ae, "-Wl,-t");
947 				break;
948 			}
949 			error(arg);
950 			break;
951 		case 'V':
952 			if (arglen == 1) {
953 				ctx->i_flags &= ~CW_F_ECHO;
954 				newae(ctx->i_ae, "--version");
955 				break;
956 			}
957 			error(arg);
958 			break;
959 		case 'v':
960 			if (arglen == 1) {
961 				warnings(ctx->i_ae);
962 				break;
963 			}
964 			error(arg);
965 			break;
966 		case 'W':
967 			if (strncmp(arg, "-Wp,-xc99", 9) == 0) {
968 				/*
969 				 * gcc's preprocessor will accept c99
970 				 * regardless, so accept and ignore.
971 				 */
972 				break;
973 			}
974 			if (strncmp(arg, "-Wa,", 4) == 0 ||
975 			    strncmp(arg, "-Wp,", 4) == 0 ||
976 			    strncmp(arg, "-Wl,", 4) == 0) {
977 				newae(ctx->i_ae, arg);
978 				break;
979 			}
980 			if (strcmp(arg, "-W0,-xc99=pragma") == 0) {
981 				/* (undocumented) enables _Pragma */
982 				break;
983 			}
984 			if (strcmp(arg, "-W0,-xc99=%none") == 0) {
985 				/*
986 				 * This is a polite way of saying
987 				 * "no c99 constructs allowed!"
988 				 * For now, just accept and ignore this.
989 				 */
990 				break;
991 			}
992 			if (strcmp(arg, "-W0,-noglobal") == 0 ||
993 			    strcmp(arg, "-W0,-xglobalstatic") == 0) {
994 				/*
995 				 * gcc doesn't prefix local symbols
996 				 * in debug mode, so this is not needed.
997 				 */
998 				break;
999 			}
1000 			if (strcmp(arg, "-W0,-Lt") == 0) {
1001 				/*
1002 				 * Generate tests at the top of loops.
1003 				 * There is no direct gcc equivalent, ignore.
1004 				 */
1005 				break;
1006 			}
1007 			if (strcmp(arg, "-W0,-xdbggen=no%usedonly") == 0) {
1008 				newae(ctx->i_ae,
1009 				    "-fno-eliminate-unused-debug-symbols");
1010 				newae(ctx->i_ae,
1011 				    "-fno-eliminate-unused-debug-types");
1012 				break;
1013 			}
1014 			if (strcmp(arg, "-W2,-xwrap_int") == 0) {
1015 				/*
1016 				 * Use the legacy behaviour (pre-SS11)
1017 				 * for integer wrapping.
1018 				 * gcc does not need this.
1019 				 */
1020 				break;
1021 			}
1022 			if (strcmp(arg, "-W2,-Rcond_elim") == 0) {
1023 				/*
1024 				 * Elimination and expansion of conditionals;
1025 				 * gcc has no direct equivalent.
1026 				 */
1027 				break;
1028 			}
1029 			if (strcmp(arg, "-Wd,-xsafe=unboundsym") == 0) {
1030 				/*
1031 				 * Prevents optimizing away checks for
1032 				 * unbound weak symbol addresses.  gcc does
1033 				 * not do this, so it's not needed.
1034 				 */
1035 				break;
1036 			}
1037 			if (strncmp(arg, "-Wc,-xcode=", 11) == 0) {
1038 				xlate(ctx->i_ae, arg + 11, xcode_tbl);
1039 				if (strncmp(arg + 11, "pic", 3) == 0)
1040 					pic = 1;
1041 				break;
1042 			}
1043 			if (strncmp(arg, "-Wc,-Qiselect", 13) == 0) {
1044 				/*
1045 				 * Prevents insertion of register symbols.
1046 				 * gcc doesn't do this, so ignore it.
1047 				 */
1048 				break;
1049 			}
1050 			if (strcmp(arg, "-Wc,-Qassembler-ounrefsym=0") == 0) {
1051 				/*
1052 				 * Prevents optimizing away of static variables.
1053 				 * gcc does not do this, so it's not needed.
1054 				 */
1055 				break;
1056 			}
1057 #if defined(__x86)
1058 			if (strcmp(arg, "-Wu,-no_got_reloc") == 0) {
1059 				newae(ctx->i_ae, "-fno-jump-tables");
1060 				newae(ctx->i_ae, "-fno-constant-pools");
1061 				break;
1062 			}
1063 			if (strcmp(arg, "-Wu,-xmodel=kernel") == 0) {
1064 				newae(ctx->i_ae, "-ffreestanding");
1065 				newae(ctx->i_ae, "-mno-red-zone");
1066 				model = "-mcmodel=kernel";
1067 				nolibc = 1;
1068 				break;
1069 			}
1070 			if (strcmp(arg, "-Wu,-save_args") == 0) {
1071 				newae(ctx->i_ae, "-msave-args");
1072 				break;
1073 			}
1074 #endif	/* __x86 */
1075 			error(arg);
1076 			break;
1077 		case 'X':
1078 			if (strcmp(arg, "-Xa") == 0 ||
1079 			    strcmp(arg, "-Xt") == 0) {
1080 				Xamode(ctx->i_ae);
1081 				break;
1082 			}
1083 			if (strcmp(arg, "-Xc") == 0) {
1084 				Xcmode(ctx->i_ae);
1085 				break;
1086 			}
1087 			if (strcmp(arg, "-Xs") == 0) {
1088 				Xsmode(ctx->i_ae);
1089 				break;
1090 			}
1091 			error(arg);
1092 			break;
1093 		case 'x':
1094 			if (arglen == 1)
1095 				error(arg);
1096 			switch (arg[2]) {
1097 #if defined(__x86)
1098 			case '3':
1099 				if (strcmp(arg, "-x386") == 0) {
1100 					newae(ctx->i_ae, "-march=i386");
1101 					break;
1102 				}
1103 				error(arg);
1104 				break;
1105 			case '4':
1106 				if (strcmp(arg, "-x486") == 0) {
1107 					newae(ctx->i_ae, "-march=i486");
1108 					break;
1109 				}
1110 				error(arg);
1111 				break;
1112 #endif	/* __x86 */
1113 			case 'a':
1114 				if (strncmp(arg, "-xarch=", 7) == 0) {
1115 					xlate(ctx->i_ae, arg + 7, xarch_tbl);
1116 					break;
1117 				}
1118 				error(arg);
1119 				break;
1120 			case 'b':
1121 				if (strncmp(arg, "-xbuiltin=", 10) == 0) {
1122 					if (strcmp(arg + 10, "%all"))
1123 						newae(ctx->i_ae, "-fbuiltin");
1124 					break;
1125 				}
1126 				error(arg);
1127 				break;
1128 			case 'C':
1129 				/* Accept C++ style comments -- ignore */
1130 				if (strcmp(arg, "-xCC") == 0)
1131 					break;
1132 				error(arg);
1133 				break;
1134 			case 'c':
1135 				if (strncmp(arg, "-xc99=%all", 10) == 0) {
1136 					newae(ctx->i_ae, "-std=gnu99");
1137 					break;
1138 				}
1139 				if (strncmp(arg, "-xc99=%none", 11) == 0) {
1140 					newae(ctx->i_ae, "-std=gnu89");
1141 					break;
1142 				}
1143 				if (strncmp(arg, "-xchip=", 7) == 0) {
1144 					xlate(ctx->i_ae, arg + 7, xchip_tbl);
1145 					break;
1146 				}
1147 				if (strncmp(arg, "-xcode=", 7) == 0) {
1148 					xlate(ctx->i_ae, arg + 7, xcode_tbl);
1149 					if (strncmp(arg + 7, "pic", 3) == 0)
1150 						pic = 1;
1151 					break;
1152 				}
1153 				if (strncmp(arg, "-xcache=", 8) == 0)
1154 					break;
1155 				if (strncmp(arg, "-xcrossfile", 11) == 0)
1156 					break;
1157 				error(arg);
1158 				break;
1159 			case 'd':
1160 				if (strcmp(arg, "-xdepend") == 0)
1161 					break;
1162 				if (strncmp(arg, "-xdebugformat=", 14) == 0)
1163 					break;
1164 				error(arg);
1165 				break;
1166 			case 'F':
1167 				/* compile for mapfile reordering -- ignore */
1168 				if (strcmp(arg, "-xF") == 0)
1169 					break;
1170 				error(arg);
1171 				break;
1172 			case 'i':
1173 				if (strncmp(arg, "-xinline", 8) == 0)
1174 					/* No inlining; ignore */
1175 					break;
1176 				if (strcmp(arg, "-xildon") == 0 ||
1177 				    strcmp(arg, "-xildoff") == 0)
1178 					/* No incremental linking; ignore */
1179 					break;
1180 				error(arg);
1181 				break;
1182 #if defined(__x86)
1183 			case 'm':
1184 				if (strcmp(arg, "-xmodel=kernel") == 0) {
1185 					newae(ctx->i_ae, "-ffreestanding");
1186 					newae(ctx->i_ae, "-mno-red-zone");
1187 					model = "-mcmodel=kernel";
1188 					nolibc = 1;
1189 					break;
1190 				}
1191 				error(arg);
1192 				break;
1193 #endif	/* __x86 */
1194 			case 'M':
1195 				if (strcmp(arg, "-xM") == 0) {
1196 					newae(ctx->i_ae, "-M");
1197 					break;
1198 				}
1199 				if (strcmp(arg, "-xM1") == 0) {
1200 					newae(ctx->i_ae, "-MM");
1201 					break;
1202 				}
1203 				error(arg);
1204 				break;
1205 			case 'n':
1206 				if (strcmp(arg, "-xnolib") == 0) {
1207 					nolibc = 1;
1208 					break;
1209 				}
1210 				error(arg);
1211 				break;
1212 			case 'O':
1213 				if (strncmp(arg, "-xO", 3) == 0) {
1214 					size_t len = strlen(arg);
1215 					char *s;
1216 					int c = *(arg + 3);
1217 					int level;
1218 
1219 					if (len != 4 || !isdigit(c))
1220 						error(arg);
1221 
1222 					if ((s = malloc(len)) == NULL)
1223 						nomem();
1224 
1225 					level = atoi(arg + 3);
1226 					if (level > 5)
1227 						error(arg);
1228 					if (level >= 2) {
1229 						/*
1230 						 * For gcc-3.4.x at -O2 we
1231 						 * need to disable optimizations
1232 						 * that break ON.
1233 						 */
1234 						optim_disable(ctx->i_ae, level);
1235 						/*
1236 						 * limit -xO3 to -O2 as well.
1237 						 */
1238 						level = 2;
1239 					}
1240 					(void) snprintf(s, len, "-O%d", level);
1241 					newae(ctx->i_ae, s);
1242 					free(s);
1243 					break;
1244 				}
1245 				error(arg);
1246 				break;
1247 			case 'p':
1248 				if (strcmp(arg, "-xpentium") == 0) {
1249 					newae(ctx->i_ae, "-march=pentium");
1250 					break;
1251 				}
1252 				if (strcmp(arg, "-xpg") == 0) {
1253 					newae(ctx->i_ae, "-pg");
1254 					break;
1255 				}
1256 				error(arg);
1257 				break;
1258 			case 'r':
1259 				if (strncmp(arg, "-xregs=", 7) == 0) {
1260 					xlate(ctx->i_ae, arg + 7, xregs_tbl);
1261 					break;
1262 				}
1263 				error(arg);
1264 				break;
1265 			case 's':
1266 				if (strcmp(arg, "-xs") == 0 ||
1267 				    strcmp(arg, "-xspace") == 0 ||
1268 				    strcmp(arg, "-xstrconst") == 0)
1269 					break;
1270 				error(arg);
1271 				break;
1272 			case 't':
1273 				if (strcmp(arg, "-xtransition") == 0) {
1274 					newae(ctx->i_ae, "-Wtransition");
1275 					break;
1276 				}
1277 				if (strcmp(arg, "-xtrigraphs=yes") == 0) {
1278 					newae(ctx->i_ae, "-trigraphs");
1279 					break;
1280 				}
1281 				if (strcmp(arg, "-xtrigraphs=no") == 0) {
1282 					newae(ctx->i_ae, "-notrigraphs");
1283 					break;
1284 				}
1285 				if (strncmp(arg, "-xtarget=", 9) == 0) {
1286 					xlate(ctx->i_ae, arg + 9, xtarget_tbl);
1287 					break;
1288 				}
1289 				error(arg);
1290 				break;
1291 			case 'e':
1292 			case 'h':
1293 			case 'l':
1294 			default:
1295 				error(arg);
1296 				break;
1297 			}
1298 			break;
1299 		case 'Y':
1300 			if (arglen == 1) {
1301 				if ((arg = *++ctx->i_oldargv) == NULL ||
1302 				    *arg == '\0')
1303 					error("-Y");
1304 				ctx->i_oldargc--;
1305 				arglen = strlen(arg + 1);
1306 			} else {
1307 				arg += 2;
1308 			}
1309 			/* Just ignore -YS,... for now */
1310 			if (strncmp(arg, "S,", 2) == 0)
1311 				break;
1312 			if (strncmp(arg, "l,", 2) == 0) {
1313 				char *s = strdup(arg);
1314 				s[0] = '-';
1315 				s[1] = 'B';
1316 				newae(ctx->i_ae, s);
1317 				free(s);
1318 				break;
1319 			}
1320 			if (strncmp(arg, "I,", 2) == 0) {
1321 				char *s = strdup(arg);
1322 				s[0] = '-';
1323 				s[1] = 'I';
1324 				newae(ctx->i_ae, "-nostdinc");
1325 				newae(ctx->i_ae, s);
1326 				free(s);
1327 				break;
1328 			}
1329 			error(arg);
1330 			break;
1331 		case 'Q':
1332 			/*
1333 			 * We could map -Qy into -Wl,-Qy etc.
1334 			 */
1335 		default:
1336 			error(arg);
1337 			break;
1338 		}
1339 	}
1340 
1341 	if (c_files > 1 && (ctx->i_flags & CW_F_SHADOW) &&
1342 	    op != CW_O_PREPROCESS) {
1343 		(void) fprintf(stderr, "%s: error: multiple source files are "
1344 		    "allowed only with -E or -P\n", progname);
1345 		exit(2);
1346 	}
1347 	if (op == CW_O_LINK && (ctx->i_flags & CW_F_SHADOW))
1348 		exit(0);
1349 
1350 	if (model && !pic)
1351 		newae(ctx->i_ae, model);
1352 	if (!nolibc)
1353 		newae(ctx->i_ae, "-lc");
1354 	if (!seen_o && (ctx->i_flags & CW_F_SHADOW)) {
1355 		newae(ctx->i_ae, "-o");
1356 		newae(ctx->i_ae, ctx->i_discard);
1357 	}
1358 }
1359 
1360 static void
1361 do_cc(cw_ictx_t *ctx)
1362 {
1363 	int in_output = 0, seen_o = 0;
1364 	cw_op_t op = CW_O_LINK;
1365 
1366 	if (ctx->i_flags & CW_F_PROG) {
1367 		newae(ctx->i_ae, "-V");
1368 		return;
1369 	}
1370 
1371 	while (--ctx->i_oldargc > 0) {
1372 		char *arg = *++ctx->i_oldargv;
1373 
1374 		if (*arg != '-') {
1375 			if (in_output == 0 || !(ctx->i_flags & CW_F_SHADOW)) {
1376 				newae(ctx->i_ae, arg);
1377 			} else {
1378 				in_output = 0;
1379 				newae(ctx->i_ae, ctx->i_discard);
1380 			}
1381 			continue;
1382 		}
1383 		switch (*(arg + 1)) {
1384 		case '_':
1385 			if (strcmp(arg, "-_noecho") == 0) {
1386 				ctx->i_flags &= ~CW_F_ECHO;
1387 			} else if (strncmp(arg, "-_cc=", 5) == 0 ||
1388 			    strncmp(arg, "-_CC=", 5) == 0) {
1389 				newae(ctx->i_ae, arg + 5);
1390 			} else if (strncmp(arg, "-_gcc=", 6) != 0 &&
1391 			    strncmp(arg, "-_g++=", 6) != 0) {
1392 				(void) fprintf(stderr,
1393 				    "%s: invalid argument '%s'\n", progname,
1394 				    arg);
1395 				exit(2);
1396 			}
1397 			break;
1398 		case 'V':
1399 			ctx->i_flags &= ~CW_F_ECHO;
1400 			newae(ctx->i_ae, arg);
1401 			break;
1402 		case 'o':
1403 			seen_o = 1;
1404 			if (strlen(arg) == 2) {
1405 				in_output = 1;
1406 				newae(ctx->i_ae, arg);
1407 			} else if (ctx->i_flags & CW_F_SHADOW) {
1408 				newae(ctx->i_ae, "-o");
1409 				newae(ctx->i_ae, ctx->i_discard);
1410 			} else {
1411 				newae(ctx->i_ae, arg);
1412 			}
1413 			break;
1414 		case 'c':
1415 		case 'S':
1416 			op = CW_O_COMPILE;
1417 			newae(ctx->i_ae, arg);
1418 			break;
1419 		case 'E':
1420 		case 'P':
1421 			op = CW_O_PREPROCESS;
1422 		/*FALLTHROUGH*/
1423 		default:
1424 			newae(ctx->i_ae, arg);
1425 		}
1426 	}
1427 
1428 	if ((op == CW_O_LINK || op == CW_O_PREPROCESS) &&
1429 	    (ctx->i_flags & CW_F_SHADOW))
1430 		exit(0);
1431 
1432 	if (!seen_o && (ctx->i_flags & CW_F_SHADOW)) {
1433 		newae(ctx->i_ae, "-o");
1434 		newae(ctx->i_ae, ctx->i_discard);
1435 	}
1436 }
1437 
1438 static void
1439 prepctx(cw_ictx_t *ctx)
1440 {
1441 	const char *dir, *cmd;
1442 	char *program;
1443 	size_t len;
1444 
1445 	dir = dirs[CIDX(CC(ctx), ctx->i_flags)];
1446 	cmd = cmds[CIDX(CC(ctx), ctx->i_flags)];
1447 	len = strlen(dir) + strlen(cmd) + 2;
1448 	if ((program = malloc(len)) == NULL)
1449 		nomem();
1450 	(void) snprintf(program, len, "%s/%s", dir, cmd);
1451 
1452 	newae(ctx->i_ae, program);
1453 
1454 	if (ctx->i_flags & CW_F_PROG) {
1455 		(void) printf("%s: %s\n", (ctx->i_flags & CW_F_SHADOW) ?
1456 		    "shadow" : "primary", program);
1457 		(void) fflush(stdout);
1458 	}
1459 
1460 	if (!(ctx->i_flags & CW_F_XLATE))
1461 		return;
1462 
1463 	switch (CC(ctx)) {
1464 	case CW_C_CC:
1465 		do_cc(ctx);
1466 		break;
1467 	case CW_C_GCC:
1468 		do_gcc(ctx);
1469 		break;
1470 	}
1471 }
1472 
1473 static int
1474 invoke(cw_ictx_t *ctx)
1475 {
1476 	char **newargv;
1477 	int ac;
1478 	struct ae *a;
1479 
1480 	if ((newargv = calloc(sizeof (*newargv), ctx->i_ae->ael_argc + 1)) ==
1481 	    NULL)
1482 		nomem();
1483 
1484 	if (ctx->i_flags & CW_F_ECHO)
1485 		(void) fprintf(stderr, "+ ");
1486 
1487 	for (ac = 0, a = ctx->i_ae->ael_head; a; a = a->ae_next, ac++) {
1488 		newargv[ac] = a->ae_arg;
1489 		if (ctx->i_flags & CW_F_ECHO)
1490 			(void) fprintf(stderr, "%s ", a->ae_arg);
1491 		if (a == ctx->i_ae->ael_tail)
1492 			break;
1493 	}
1494 
1495 	if (ctx->i_flags & CW_F_ECHO) {
1496 		(void) fprintf(stderr, "\n");
1497 		(void) fflush(stderr);
1498 	}
1499 
1500 	if (!(ctx->i_flags & CW_F_EXEC))
1501 		return (0);
1502 
1503 	/*
1504 	 * We must fix up the environment here so that the
1505 	 * dependency files are not trampled by the shadow compiler.
1506 	 */
1507 	if ((ctx->i_flags & CW_F_SHADOW) &&
1508 	    (unsetenv("SUNPRO_DEPENDENCIES") != 0 ||
1509 	    unsetenv("DEPENDENCIES_OUTPUT") != 0)) {
1510 		(void) fprintf(stderr, "error: environment setup failed: %s\n",
1511 		    strerror(errno));
1512 		return (-1);
1513 	}
1514 
1515 	(void) execv(newargv[0], newargv);
1516 	cw_perror("couldn't run %s", newargv[0]);
1517 
1518 	return (-1);
1519 }
1520 
1521 static int
1522 reap(cw_ictx_t *ctx)
1523 {
1524 	int status, ret = 0;
1525 	char buf[1024];
1526 	struct stat s;
1527 
1528 	do {
1529 		(void) waitpid(ctx->i_pid, &status, 0);
1530 		if (status != 0) {
1531 			if (WIFSIGNALED(status)) {
1532 				ret = -WTERMSIG(status);
1533 				break;
1534 			} else if (WIFEXITED(status)) {
1535 				ret = WEXITSTATUS(status);
1536 				break;
1537 			}
1538 		}
1539 	} while (!WIFEXITED(status) && !WIFSIGNALED(status));
1540 
1541 	(void) unlink(ctx->i_discard);
1542 
1543 	if (stat(ctx->i_stderr, &s) < 0) {
1544 		cw_perror("stat failed on child cleanup");
1545 		return (-1);
1546 	}
1547 	if (s.st_size != 0) {
1548 		FILE *f;
1549 
1550 		if ((f = fopen(ctx->i_stderr, "r")) != NULL) {
1551 			while (fgets(buf, sizeof (buf), f))
1552 				(void) fprintf(stderr, "%s", buf);
1553 			(void) fflush(stderr);
1554 			(void) fclose(f);
1555 		}
1556 	}
1557 	(void) unlink(ctx->i_stderr);
1558 	free(ctx->i_stderr);
1559 
1560 	/*
1561 	 * cc returns an error code when given -V; we want that to succeed.
1562 	 */
1563 	if (ctx->i_flags & CW_F_PROG)
1564 		return (0);
1565 
1566 	return (ret);
1567 }
1568 
1569 static int
1570 exec_ctx(cw_ictx_t *ctx, int block)
1571 {
1572 	char *file;
1573 
1574 	/*
1575 	 * To avoid offending cc's sensibilities, the name of its output
1576 	 * file must end in '.o'.
1577 	 */
1578 	if ((file = tempnam(NULL, ".cw")) == NULL) {
1579 		nomem();
1580 		return (-1);
1581 	}
1582 	(void) strlcpy(ctx->i_discard, file, MAXPATHLEN);
1583 	(void) strlcat(ctx->i_discard, ".o", MAXPATHLEN);
1584 	free(file);
1585 
1586 	if ((ctx->i_stderr = tempnam(NULL, ".cw")) == NULL) {
1587 		nomem();
1588 		return (-1);
1589 	}
1590 
1591 	if ((ctx->i_pid = fork()) == 0) {
1592 		int fd;
1593 
1594 		(void) fclose(stderr);
1595 		if ((fd = open(ctx->i_stderr, O_WRONLY | O_CREAT | O_EXCL,
1596 		    0666)) < 0) {
1597 			cw_perror("open failed for standard error");
1598 			exit(1);
1599 		}
1600 		if (dup2(fd, 2) < 0) {
1601 			cw_perror("dup2 failed for standard error");
1602 			exit(1);
1603 		}
1604 		if (fd != 2)
1605 			(void) close(fd);
1606 		if (freopen("/dev/fd/2", "w", stderr) == NULL) {
1607 			cw_perror("freopen failed for /dev/fd/2");
1608 			exit(1);
1609 		}
1610 		prepctx(ctx);
1611 		exit(invoke(ctx));
1612 	}
1613 
1614 	if (ctx->i_pid < 0) {
1615 		cw_perror("fork failed");
1616 		return (1);
1617 	}
1618 
1619 	if (block)
1620 		return (reap(ctx));
1621 
1622 	return (0);
1623 }
1624 
1625 int
1626 main(int argc, char **argv)
1627 {
1628 	cw_ictx_t *ctx = newictx();
1629 	cw_ictx_t *ctx_shadow = newictx();
1630 	const char *dir;
1631 	char cc_buf[MAXPATHLEN], gcc_buf[MAXPATHLEN];
1632 	int do_serial, do_shadow;
1633 	int ret = 0;
1634 
1635 	if ((progname = strrchr(argv[0], '/')) == NULL)
1636 		progname = argv[0];
1637 	else
1638 		progname++;
1639 
1640 	if (ctx == NULL || ctx_shadow == NULL)
1641 		nomem();
1642 
1643 	ctx->i_flags = CW_F_ECHO|CW_F_XLATE;
1644 
1645 	/*
1646 	 * Figure out where to get our tools from.  This depends on
1647 	 * the environment variables set at run time.
1648 	 */
1649 	if ((dir = getenv("SPRO_VROOT")) != NULL) {
1650 		(void) snprintf(cc_buf, MAXPATHLEN, "%s/bin", dir);
1651 	} else if ((dir = getenv("SPRO_ROOT")) != NULL) {
1652 		(void) snprintf(cc_buf, MAXPATHLEN, "%s/SS11/bin", dir);
1653 	} else if ((dir = getenv("BUILD_TOOLS")) != NULL) {
1654 		(void) snprintf(cc_buf, MAXPATHLEN,
1655 		    "%s/SUNWspro/SS11/bin", dir);
1656 	}
1657 	if (dir != NULL) {
1658 		dirs[CIDX(CW_C_CC, 0)] = (const char *)cc_buf;
1659 		dirs[CIDX(CW_C_CC, CW_F_CXX)] = (const char *)cc_buf;
1660 	}
1661 
1662 	if ((dir = getenv("GNU_ROOT")) != NULL) {
1663 		(void) snprintf(gcc_buf, MAXPATHLEN, "%s/bin", dir);
1664 		dirs[CIDX(CW_C_GCC, 0)] = (const char *)gcc_buf;
1665 		dirs[CIDX(CW_C_GCC, CW_F_CXX)] = (const char *)gcc_buf;
1666 	}
1667 
1668 	if ((dir = getenv("CW_CC_DIR")) != NULL)
1669 		dirs[CIDX(CW_C_CC, 0)] = dir;
1670 	if ((dir = getenv("CW_CPLUSPLUS_DIR")) != NULL)
1671 		dirs[CIDX(CW_C_CC, CW_F_CXX)] = dir;
1672 	if ((dir = getenv("CW_GCC_DIR")) != NULL)
1673 		dirs[CIDX(CW_C_GCC, 0)] = dir;
1674 	if ((dir = getenv("CW_GPLUSPLUS_DIR")) != NULL)
1675 		dirs[CIDX(CW_C_GCC, CW_F_CXX)] = dir;
1676 
1677 	do_shadow = (getenv("CW_NO_SHADOW") ? 0 : 1);
1678 	do_serial = (getenv("CW_SHADOW_SERIAL") ? 1 : 0);
1679 
1680 	if (getenv("CW_NO_EXEC") == NULL)
1681 		ctx->i_flags |= CW_F_EXEC;
1682 
1683 	/*
1684 	 * The first argument must be one of "-_cc", "-_gcc", "-_CC", or "-_g++"
1685 	 */
1686 	if (argc == 1)
1687 		usage();
1688 	argc--;
1689 	argv++;
1690 	if (strcmp(argv[0], "-_cc") == 0) {
1691 		ctx->i_compiler = CW_C_CC;
1692 	} else if (strcmp(argv[0], "-_gcc") == 0) {
1693 		ctx->i_compiler = CW_C_GCC;
1694 	} else if (strcmp(argv[0], "-_CC") == 0) {
1695 		ctx->i_compiler = CW_C_CC;
1696 		ctx->i_flags |= CW_F_CXX;
1697 	} else if (strcmp(argv[0], "-_g++") == 0) {
1698 		ctx->i_compiler = CW_C_GCC;
1699 		ctx->i_flags |= CW_F_CXX;
1700 	} else {
1701 		/* assume "-_gcc" by default */
1702 		argc++;
1703 		argv--;
1704 		ctx->i_compiler = CW_C_GCC;
1705 	}
1706 
1707 	/*
1708 	 * -_compiler - tell us the path to the primary compiler only
1709 	 */
1710 	if (argc > 1 && strcmp(argv[1], "-_compiler") == 0) {
1711 		ctx->i_flags &= ~CW_F_XLATE;
1712 		prepctx(ctx);
1713 		(void) printf("%s\n", ctx->i_ae->ael_head->ae_arg);
1714 		return (0);
1715 	}
1716 
1717 	/*
1718 	 * -_versions - tell us the cw version, paths to all compilers, and
1719 	 *		ask each for its version if we know how.
1720 	 */
1721 	if (argc > 1 && strcmp(argv[1], "-_versions") == 0) {
1722 		(void) printf("%s", "cw version %I%");
1723 		if (!do_shadow)
1724 			(void) printf(" (SHADOW MODE DISABLED)");
1725 		(void) printf("\n");
1726 		(void) fflush(stdout);
1727 		ctx->i_flags &= ~CW_F_ECHO;
1728 		ctx->i_flags |= CW_F_PROG|CW_F_EXEC;
1729 		argc--;
1730 		argv++;
1731 		do_serial = 1;
1732 	}
1733 
1734 	ctx->i_oldargc = argc;
1735 	ctx->i_oldargv = argv;
1736 
1737 	ret |= exec_ctx(ctx, do_serial);
1738 
1739 	if (do_shadow) {
1740 		(void) memcpy(ctx_shadow, ctx, sizeof (cw_ictx_t));
1741 		ctx_shadow->i_flags |= CW_F_SHADOW;
1742 		ret |= exec_ctx(ctx_shadow, 1);
1743 	}
1744 
1745 	if (!do_serial)
1746 		ret |= reap(ctx);
1747 
1748 	return (ret);
1749 }
1750