1 
   2 /*
   3  * CDDL HEADER START
   4  *
   5  * The contents of this file are subject to the terms of the
   6  * Common Development and Distribution License (the "License").
   7  * You may not use this file except in compliance with the License.
   8  *
   9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10  * or http://www.opensolaris.org/os/licensing.
  11  * See the License for the specific language governing permissions
  12  * and limitations under the License.
  13  *
  14  * When distributing Covered Code, include this CDDL HEADER in each
  15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16  * If applicable, add the following below this CDDL HEADER, with the
  17  * fields enclosed by brackets "[]" replaced with your own identifying
  18  * information: Portions Copyright [yyyy] [name of copyright owner]
  19  *
  20  * CDDL HEADER END
  21  */
  22 
  23 /*
  24  * Copyright 2018, Richard Lowe.
  25  */
  26 /*
  27  * Copyright 2010 Sun Microsystems, Inc.  All rights reserved.
  28  * Use is subject to license terms.
  29  *
  30  * Copyright 2019 Joyent, Inc.
  31  */
  32 
  33 /*
  34  * Wrapper for the GNU C compiler to make it accept the Sun C compiler
  35  * arguments where possible.
  36  *
  37  * Since the translation is inexact, this is something of a work-in-progress.
  38  *
  39  */
  40 
  41 /* If you modify this file, you must increment CW_VERSION */
  42 #define CW_VERSION      "4.0"
  43 
  44 /*
  45  * -#           Verbose mode
  46  * -###         Show compiler commands built by driver, no compilation
  47  * -A<name[(tokens)]>     Preprocessor predicate assertion
  48  * -B<[static|dynamic]>   Specify dynamic or static binding
  49  * -C           Prevent preprocessor from removing comments
  50  * -c           Compile only - produce .o files, suppress linking
  51  * -cg92        Alias for -xtarget=ss1000
  52  * -D<name[=token]>       Associate name with token as if by #define
  53  * -d[y|n]      dynamic [-dy] or static [-dn] option to linker
  54  * -E           Compile source through preprocessor only, output to stdout
  55  * -erroff=<t>    Suppress warnings specified by tags t(%none, %all, <tag list>)
  56  * -errtags=<a>   Display messages with tags a(no, yes)
  57  * -errwarn=<t>   Treats warnings specified by tags t(%none, %all, <tag list>)
  58  *              as errors
  59  * -fast        Optimize using a selection of options
  60  * -fd          Report old-style function definitions and declarations
  61  * -fnonstd     Initialize floating-point hardware to non-standard preferences
  62  * -fns[=<yes|no>] Select non-standard floating point mode
  63  * -fprecision=<p> Set FP rounding precision mode p(single, double, extended)
  64  * -fround=<r>    Select the IEEE rounding mode in effect at startup
  65  * -fsimple[=<n>] Select floating-point optimization preferences <n>
  66  * -fsingle     Use single-precision arithmetic (-Xt and -Xs modes only)
  67  * -ftrap=<t>     Select floating-point trapping mode in effect at startup
  68  * -fstore      force floating pt. values to target precision on assignment
  69  * -G           Build a dynamic shared library
  70  * -g           Compile for debugging
  71  * -H           Print path name of each file included during compilation
  72  * -h <name>      Assign <name> to generated dynamic shared library
  73  * -I<dir>        Add <dir> to preprocessor #include file search path
  74  * -i           Passed to linker to ignore any LD_LIBRARY_PATH setting
  75  * -keeptmp     Keep temporary files created during compilation
  76  * -L<dir>        Pass to linker to add <dir> to the library search path
  77  * -l<name>       Link with library lib<name>.a or lib<name>.so
  78  * -mc          Remove duplicate strings from .comment section of output files
  79  * -mr          Remove all strings from .comment section of output files
  80  * -mr,"string" Remove all strings and append "string" to .comment section
  81  * -mt          Specify options needed when compiling multi-threaded code
  82  * -native      Find available processor, generate code accordingly
  83  * -nofstore    Do not force floating pt. values to target precision
  84  *              on assignment
  85  * -norunpath   Do not build in a runtime path for shared libraries
  86  * -O           Use default optimization level (-xO2 or -xO3. Check man page.)
  87  * -o <outputfile> Set name of output file to <outputfile>
  88  * -P           Compile source through preprocessor only, output to .i  file
  89  * -p           Compile for profiling with prof
  90  * -Q[y|n]      Emit/don't emit identification info to output file
  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  * -Xs          Compile assuming (pre-ANSI) K & R C style code
 103  * -Xt          Compile assuming K & R conformance, allow ANSI C
 104  * -xarch=<a>     Specify target architecture instruction set
 105  * -xbuiltin[=<b>] When profitable inline, or substitute intrinisic functions
 106  *              for system functions, b={%all,%none}
 107  * -xCC         Accept C++ style comments
 108  * -xchip=<c>     Specify the target processor for use by the optimizer
 109  * -xcode=<c>     Generate different code for forming addresses
 110  * -xcrossfile[=<n>] Enable optimization and inlining across source files,
 111  *              n={0|1}
 112  * -xe          Perform only syntax/semantic checking, no code generation
 113  * -xF          Compile for later mapfile reordering or unused section
 114  *              elimination
 115  * -xhelp=<f>     Display on-line help information f(flags, readme, errors)
 116  * -xildoff     Cancel -xildon
 117  * -xildon      Enable use of the incremental linker, ild
 118  * -xinline=[<a>,...,<a>]  Attempt inlining of specified user routines,
 119  *              <a>={%auto,func,no%func}
 120  * -xlibmieee   Force IEEE 754 return values for math routines in
 121  *              exceptional cases
 122  * -xlibmil     Inline selected libm math routines for optimization
 123  * -xlic_lib=sunperf    Link in the Sun supplied performance libraries
 124  * -xlicinfo    Show license server information
 125  * -xmaxopt=[off,1,2,3,4,5] maximum optimization level allowed on #pragma opt
 126  * -xO<n> Generate optimized code (n={1|2|3|4|5})
 127  * -xP          Print prototypes for function definitions
 128  * -xprofile=<p> Collect data for a profile or use a profile to optimize
 129  *              <p>={{collect,use}[:<path>],tcov}
 130  * -xregs=<r>     Control register allocation
 131  * -xs          Allow debugging without object (.o) files
 132  * -xsb         Compile for use with the WorkShop source browser
 133  * -xsbfast     Generate only WorkShop source browser info, no compilation
 134  * -xsfpconst   Represent unsuffixed floating point constants as single
 135  *              precision
 136  * -xspace      Do not do optimizations that increase code size
 137  * -xstrconst   Place string literals into read-only data segment
 138  * -xtarget=<t>   Specify target system for optimization
 139  * -xtemp=<dir>   Set directory for temporary files to <dir>
 140  * -xtime       Report the execution time for each compilation phase
 141  * -xunroll=n   Enable unrolling loops n times where possible
 142  * -Y<c>,<dir>      Specify <dir> for location of component <c> (a,l,m,p,0,h,i,u)
 143  * -YA,<dir>      Change default directory searched for components
 144  * -YI,<dir>      Change default directory searched for include files
 145  * -YP,<dir>      Change default directory for finding libraries files
 146  * -YS,<dir>      Change default directory for startup object files
 147  */
 148 
 149 /*
 150  * Translation table:
 151  */
 152 /*
 153  * -#                           -v
 154  * -###                         error
 155  * -A<name[(tokens)]>             pass-thru
 156  * -B<[static|dynamic]>           pass-thru (syntax error for anything else)
 157  * -C                           pass-thru
 158  * -c                           pass-thru
 159  * -cg92                        -m32 -mcpu=v8 -mtune=supersparc (SPARC only)
 160  * -D<name[=token]>               pass-thru
 161  * -dy or -dn                   -Wl,-dy or -Wl,-dn
 162  * -E                           pass-thru
 163  * -erroff=E_EMPTY_TRANSLATION_UNIT ignore
 164  * -errtags=%all                -Wall
 165  * -errwarn=%all                -Werror else -Wno-error
 166  * -fast                        error
 167  * -fd                          error
 168  * -fnonstd                     error
 169  * -fns[=<yes|no>]                error
 170  * -fprecision=<p>                error
 171  * -fround=<r>                    error
 172  * -fsimple[=<n>]         error
 173  * -fsingle[=<n>]         error
 174  * -ftrap=<t>                     error
 175  * -fstore                      error
 176  * -G                           pass-thru
 177  * -g                           pass-thru
 178  * -H                           pass-thru
 179  * -h <name>                      pass-thru
 180  * -I<dir>                        pass-thru
 181  * -i                           pass-thru
 182  * -keeptmp                     -save-temps
 183  * -L<dir>                        pass-thru
 184  * -l<name>                       pass-thru
 185  * -mc                          error
 186  * -mr                          error
 187  * -mr,"string"                 error
 188  * -mt                          -D_REENTRANT
 189  * -native                      error
 190  * -nofstore                    error
 191  * -nolib                       -nodefaultlibs
 192  * -norunpath                   ignore
 193  * -O                           -O1 (Check the man page to be certain)
 194  * -o <outputfile>                pass-thru
 195  * -P                           -E -o filename.i (or error)
 196  * -p                           pass-thru
 197  * -Q[y|n]                      error
 198  * -R<dir[:dir]>          pass-thru
 199  * -S                           pass-thru
 200  * -s                           -Wl,-s
 201  * -t                           -Wl,-t
 202  * -U<name>                       pass-thru
 203  * -V                           --version
 204  * -v                           -Wall
 205  * -Wa,<arg>                      pass-thru
 206  * -Wp,<arg>                      pass-thru except -xc99=<a>
 207  * -Wl,<arg>                      pass-thru
 208  * -W{m,0,2,h,i,u>           error/ignore
 209  * -xmodel=kernel               -ffreestanding -mcmodel=kernel -mno-red-zone
 210  * -Wu,-save_args               -msave-args
 211  * -w                           pass-thru
 212  * -Xa                          -std=iso9899:199409 or -ansi
 213  * -Xt                          error
 214  * -Xs                          -traditional -std=c89
 215  * -xarch=<a>                     table
 216  * -xbuiltin[=<b>]                -fbuiltin (-fno-builtin otherwise)
 217  * -xCC                         ignore
 218  * -xchip=<c>                     table
 219  * -xcode=<c>                     table
 220  * -xcrossfile[=<n>]              ignore
 221  * -xe                          error
 222  * -xF                          error
 223  * -xhelp=<f>                     error
 224  * -xildoff                     ignore
 225  * -xildon                      ignore
 226  * -xinline                     ignore
 227  * -xlibmieee                   error
 228  * -xlibmil                     error
 229  * -xlic_lib=sunperf            error
 230  * -xmaxopt=[...]               error
 231  * -xO<n>                 -O<n>
 232  * -xP                          error
 233  * -xprofile=<p>          error
 234  * -xregs=<r>                     table
 235  * -xs                          error
 236  * -xsb                         error
 237  * -xsbfast                     error
 238  * -xsfpconst                   error
 239  * -xspace                      ignore (-not -Os)
 240  * -xstrconst                   ignore
 241  * -xtarget=<t>                   table
 242  * -xtemp=<dir>                   error
 243  * -xtime                       error
 244  * -xtransition                 -Wtransition
 245  * -xunroll=n                   error
 246  * -W0,-xdbggen=no%usedonly     -fno-eliminate-unused-debug-symbols
 247  *                              -fno-eliminate-unused-debug-types
 248  * -Y<c>,<dir>                      error
 249  * -YA,<dir>                      error
 250  * -YI,<dir>                      -nostdinc -I<dir>
 251  * -YP,<dir>                      error
 252  * -YS,<dir>                      error
 253  */
 254 
 255 #include <ctype.h>
 256 #include <err.h>
 257 #include <errno.h>
 258 #include <fcntl.h>
 259 #include <getopt.h>
 260 #include <stdio.h>
 261 #include <stdlib.h>
 262 #include <string.h>
 263 #include <unistd.h>
 264 #include <dirent.h>
 265 
 266 #include <sys/param.h>
 267 #include <sys/stat.h>
 268 #include <sys/types.h>
 269 #include <sys/utsname.h>
 270 #include <sys/wait.h>
 271 
 272 #define CW_F_CXX        0x01
 273 #define CW_F_SHADOW     0x02
 274 #define CW_F_EXEC       0x04
 275 #define CW_F_ECHO       0x08
 276 #define CW_F_XLATE      0x10
 277 #define CW_F_PROG       0x20
 278 
 279 typedef enum cw_op {
 280         CW_O_NONE = 0,
 281         CW_O_PREPROCESS,
 282         CW_O_COMPILE,
 283         CW_O_LINK
 284 } cw_op_t;
 285 
 286 struct aelist {
 287         struct ae {
 288                 struct ae *ae_next;
 289                 char *ae_arg;
 290         } *ael_head, *ael_tail;
 291         int ael_argc;
 292 };
 293 
 294 typedef enum {
 295         GNU,
 296         SUN,
 297         SMATCH
 298 } compiler_style_t;
 299 
 300 typedef struct {
 301         char *c_name;
 302         char *c_path;
 303         compiler_style_t c_style;
 304 } cw_compiler_t;
 305 
 306 typedef struct cw_ictx {
 307         struct cw_ictx  *i_next;
 308         cw_compiler_t   *i_compiler;
 309         char            *i_linker;
 310         struct aelist   *i_ae;
 311         uint32_t        i_flags;
 312         int             i_oldargc;
 313         char            **i_oldargv;
 314         pid_t           i_pid;
 315         char            *i_tmpdir;
 316         char            *i_stderr;
 317 } cw_ictx_t;
 318 
 319 /*
 320  * Status values to indicate which Studio compiler and associated
 321  * flags are being used.
 322  */
 323 #define M32             0x01    /* -m32 - only on Studio 12 */
 324 #define M64             0x02    /* -m64 - only on Studio 12 */
 325 #define SS11            0x100   /* Studio 11 */
 326 #define SS12            0x200   /* Studio 12 */
 327 
 328 #define TRANS_ENTRY     5
 329 /*
 330  * Translation table definition for the -xarch= flag. The "x_arg"
 331  * value is translated into the appropriate gcc flags according
 332  * to the values in x_trans[n]. The x_flags indicates what compiler
 333  * is being used and what flags have been set via the use of
 334  * "x_arg".
 335  */
 336 typedef struct xarch_table {
 337         char    *x_arg;
 338         int     x_flags;
 339         char    *x_trans[TRANS_ENTRY];
 340 } xarch_table_t;
 341 
 342 /*
 343  * The translation table for the -xarch= flag used in the Studio compilers.
 344  */
 345 static const xarch_table_t xtbl[] = {
 346 #if defined(__x86)
 347         { "generic",    SS11, {NULL} },
 348         { "generic64",  (SS11|M64), { "-m64", "-mtune=opteron" } },
 349         { "amd64",      (SS11|M64), { "-m64", "-mtune=opteron" } },
 350         { "386",        SS11,   { "-march=i386" } },
 351         { "pentium_pro", SS11,  { "-march=pentiumpro" } },
 352         { "sse",        SS11, { "-msse", "-mfpmath=sse" } },
 353         { "sse2",       SS11, { "-msse2", "-mfpmath=sse" } },
 354 #elif defined(__sparc)
 355         { "generic",    (SS11|M32), { "-m32", "-mcpu=v8" } },
 356         { "generic64",  (SS11|M64), { "-m64", "-mcpu=v9" } },
 357         { "v8",         (SS11|M32), { "-m32", "-mcpu=v8", "-mno-v8plus" } },
 358         { "v8plus",     (SS11|M32), { "-m32", "-mcpu=v9", "-mv8plus" } },
 359         { "v8plusa",    (SS11|M32), { "-m32", "-mcpu=ultrasparc", "-mv8plus",
 360                         "-mvis" } },
 361         { "v8plusb",    (SS11|M32), { "-m32", "-mcpu=ultrasparc3", "-mv8plus",
 362                         "-mvis" } },
 363         { "v9",         (SS11|M64), { "-m64", "-mcpu=v9" } },
 364         { "v9a",        (SS11|M64), { "-m64", "-mcpu=ultrasparc", "-mvis" } },
 365         { "v9b",        (SS11|M64), { "-m64", "-mcpu=ultrasparc3", "-mvis" } },
 366         { "sparc",      SS12, { "-mcpu=v9", "-mv8plus" } },
 367         { "sparcvis",   SS12, { "-mcpu=ultrasparc", "-mvis" } },
 368         { "sparcvis2",  SS12, { "-mcpu=ultrasparc3", "-mvis" } }
 369 #endif
 370 };
 371 
 372 static int xtbl_size = sizeof (xtbl) / sizeof (xarch_table_t);
 373 
 374 static const char *xchip_tbl[] = {
 375 #if defined(__x86)
 376         "386",          "-mtune=i386", NULL,
 377         "486",          "-mtune=i486", NULL,
 378         "pentium",      "-mtune=pentium", NULL,
 379         "pentium_pro",  "-mtune=pentiumpro", NULL,
 380 #elif defined(__sparc)
 381         "super",        "-mtune=supersparc", NULL,
 382         "ultra",        "-mtune=ultrasparc", NULL,
 383         "ultra3",       "-mtune=ultrasparc3", NULL,
 384 #endif
 385         NULL,           NULL
 386 };
 387 
 388 static const char *xcode_tbl[] = {
 389 #if defined(__sparc)
 390         "abs32",        "-fno-pic", "-mcmodel=medlow", NULL,
 391         "abs44",        "-fno-pic", "-mcmodel=medmid", NULL,
 392         "abs64",        "-fno-pic", "-mcmodel=medany", NULL,
 393         "pic13",        "-fpic", NULL,
 394         "pic32",        "-fPIC", NULL,
 395 #endif
 396         NULL,           NULL
 397 };
 398 
 399 static const char *xtarget_tbl[] = {
 400 #if defined(__x86)
 401         "pentium_pro",  "-march=pentiumpro", NULL,
 402 #endif  /* __x86 */
 403         NULL,           NULL
 404 };
 405 
 406 static const char *xregs_tbl[] = {
 407 #if defined(__sparc)
 408         "appl",         "-mapp-regs", NULL,
 409         "no%appl",      "-mno-app-regs", NULL,
 410         "float",        "-mfpu", NULL,
 411         "no%float",     "-mno-fpu", NULL,
 412 #endif  /* __sparc */
 413         NULL,           NULL
 414 };
 415 
 416 static void
 417 nomem(void)
 418 {
 419         errx(1, "out of memory");
 420 }
 421 
 422 static void
 423 newae(struct aelist *ael, const char *arg)
 424 {
 425         struct ae *ae;
 426 
 427         if ((ae = calloc(sizeof (*ae), 1)) == NULL)
 428                 nomem();
 429         ae->ae_arg = strdup(arg);
 430         if (ael->ael_tail == NULL)
 431                 ael->ael_head = ae;
 432         else
 433                 ael->ael_tail->ae_next = ae;
 434         ael->ael_tail = ae;
 435         ael->ael_argc++;
 436 }
 437 
 438 static cw_ictx_t *
 439 newictx(void)
 440 {
 441         cw_ictx_t *ctx = calloc(sizeof (cw_ictx_t), 1);
 442         if (ctx)
 443                 if ((ctx->i_ae = calloc(sizeof (struct aelist), 1)) == NULL) {
 444                         free(ctx);
 445                         return (NULL);
 446                 }
 447 
 448         return (ctx);
 449 }
 450 
 451 static void
 452 error(const char *arg)
 453 {
 454         errx(2, "error: mapping failed at or near arg '%s'", arg);
 455 }
 456 
 457 /*
 458  * Add the current favourite set of warnings to the gcc invocation.
 459  */
 460 static void
 461 warnings(struct aelist *h)
 462 {
 463         static int warningsonce;
 464 
 465         if (warningsonce++)
 466                 return;
 467 
 468         /*
 469          * Enable as many warnings as exist, then disable those that we never
 470          * ever want.
 471          */
 472         newae(h, "-Wall");
 473         newae(h, "-Wextra");
 474 }
 475 
 476 static void
 477 optim_disable(struct aelist *h, int level)
 478 {
 479         if (level >= 2) {
 480                 newae(h, "-fno-strict-aliasing");
 481                 newae(h, "-fno-unit-at-a-time");
 482                 newae(h, "-fno-optimize-sibling-calls");
 483         }
 484 }
 485 
 486 static void
 487 Xsmode(struct aelist *h)
 488 {
 489         static int xsonce;
 490 
 491         if (xsonce++)
 492                 return;
 493 
 494         newae(h, "-traditional");
 495         newae(h, "-traditional-cpp");
 496 }
 497 
 498 static void
 499 usage()
 500 {
 501         extern char *__progname;
 502         (void) fprintf(stderr,
 503             "usage: %s [-C] [--versions] --primary <compiler> "
 504             "[--shadow <compiler>]... -- cflags...\n",
 505             __progname);
 506         (void) fprintf(stderr, "compilers take the form: name,path,style\n"
 507             " - name: a unique name usable in flag specifiers\n"
 508             " - path: path to the compiler binary\n"
 509             " - style: the style of flags expected: either sun or gnu\n");
 510         exit(2);
 511 }
 512 
 513 static int
 514 xlate_xtb(struct aelist *h, const char *xarg)
 515 {
 516         int     i, j;
 517 
 518         for (i = 0; i < xtbl_size; i++) {
 519                 if (strcmp(xtbl[i].x_arg, xarg) == 0)
 520                         break;
 521         }
 522 
 523         /*
 524          * At the end of the table and so no matching "arg" entry
 525          * found and so this must be a bad -xarch= flag.
 526          */
 527         if (i == xtbl_size)
 528                 error(xarg);
 529 
 530         for (j = 0; j < TRANS_ENTRY; j++) {
 531                 if (xtbl[i].x_trans[j] != NULL)
 532                         newae(h, xtbl[i].x_trans[j]);
 533                 else
 534                         break;
 535         }
 536         return (xtbl[i].x_flags);
 537 
 538 }
 539 
 540 static void
 541 xlate(struct aelist *h, const char *xarg, const char **table)
 542 {
 543         while (*table != NULL && strcmp(xarg, *table) != 0) {
 544                 while (*table != NULL)
 545                         table++;
 546                 table++;
 547         }
 548 
 549         if (*table == NULL)
 550                 error(xarg);
 551 
 552         table++;
 553 
 554         while (*table != NULL) {
 555                 newae(h, *table);
 556                 table++;
 557         }
 558 }
 559 
 560 /*
 561  * The compiler wants the output file to end in appropriate extension.  If
 562  * we're generating a name from whole cloth (path == NULL), we assume that
 563  * extension to be .o, otherwise we match the extension of the caller.
 564  */
 565 static char *
 566 discard_file_name(cw_ictx_t *ctx, const char *path)
 567 {
 568         char *ret, *ext;
 569         char tmpl[] = "cwXXXXXX";
 570 
 571         if (path == NULL) {
 572                 ext = ".o";
 573         } else {
 574                 ext = strrchr(path, '.');
 575         }
 576 
 577         /*
 578          * We need absolute control over where the temporary file goes, since
 579          * we rely on it for cleanup so tempnam(3C) and tmpnam(3C) are
 580          * inappropriate (they use TMPDIR, preferentially).
 581          *
 582          * mkstemp(3C) doesn't actually help us, since the temporary file
 583          * isn't used by us, only its name.
 584          */
 585         if (mktemp(tmpl) == NULL)
 586                 nomem();
 587 
 588         (void) asprintf(&ret, "%s/%s%s", ctx->i_tmpdir, tmpl,
 589             (ext != NULL) ? ext : "");
 590 
 591         if (ret == NULL)
 592                 nomem();
 593 
 594         return (ret);
 595 }
 596 
 597 static boolean_t
 598 is_source_file(const char *path)
 599 {
 600         char *ext = strrchr(path, '.');
 601 
 602         if ((ext == NULL) || (*(ext + 1) == '\0'))
 603                 return (B_FALSE);
 604 
 605         ext += 1;
 606 
 607         if ((strcasecmp(ext, "c") == 0) ||
 608             (strcmp(ext, "cc") == 0) ||
 609             (strcmp(ext, "i") == 0) ||
 610             (strcasecmp(ext, "s") == 0) ||
 611             (strcmp(ext, "cpp") == 0)) {
 612                 return (B_TRUE);
 613         }
 614 
 615         return (B_FALSE);
 616 }
 617 
 618 
 619 static void
 620 do_gcc(cw_ictx_t *ctx)
 621 {
 622         int c;
 623         int nolibc = 0;
 624         int in_output = 0, seen_o = 0, c_files = 0;
 625         cw_op_t op = CW_O_LINK;
 626         char *model = NULL;
 627         char *nameflag;
 628         int mflag = 0;
 629 
 630         if (ctx->i_flags & CW_F_PROG) {
 631                 newae(ctx->i_ae, "--version");
 632                 return;
 633         }
 634 
 635         newae(ctx->i_ae, "-fident");
 636         newae(ctx->i_ae, "-finline");
 637         newae(ctx->i_ae, "-fno-inline-functions");
 638         newae(ctx->i_ae, "-fno-builtin");
 639         newae(ctx->i_ae, "-fno-asm");
 640         newae(ctx->i_ae, "-fdiagnostics-show-option");
 641         newae(ctx->i_ae, "-nodefaultlibs");
 642 
 643 #if defined(__sparc)
 644         /*
 645          * The SPARC ldd and std instructions require 8-byte alignment of
 646          * their address operand.  gcc correctly uses them only when the
 647          * ABI requires 8-byte alignment; unfortunately we have a number of
 648          * pieces of buggy code that doesn't conform to the ABI.  This
 649          * flag makes gcc work more like Studio with -xmemalign=4.
 650          */
 651         newae(ctx->i_ae, "-mno-integer-ldd-std");
 652 #endif
 653 
 654         /*
 655          * This is needed because 'u' is defined
 656          * under a conditional on 'sun'.  Should
 657          * probably just remove the conditional,
 658          * or make it be dependent on '__sun'.
 659          *
 660          * -Dunix is also missing in enhanced ANSI mode
 661          */
 662         newae(ctx->i_ae, "-D__sun");
 663 
 664         if (asprintf(&nameflag, "-_%s=", ctx->i_compiler->c_name) == -1)
 665                 nomem();
 666 
 667         /*
 668          * Walk the argument list, translating as we go ..
 669          */
 670         while (--ctx->i_oldargc > 0) {
 671                 char *arg = *++ctx->i_oldargv;
 672                 size_t arglen = strlen(arg);
 673 
 674                 if (*arg == '-') {
 675                         arglen--;
 676                 } else {
 677                         /*
 678                          * Discard inline files that gcc doesn't grok
 679                          */
 680                         if (!in_output && arglen > 3 &&
 681                             strcmp(arg + arglen - 3, ".il") == 0)
 682                                 continue;
 683 
 684                         if (!in_output && is_source_file(arg))
 685                                 c_files++;
 686 
 687                         /*
 688                          * Otherwise, filenames and partial arguments
 689                          * are passed through for gcc to chew on.  However,
 690                          * output is always discarded for the secondary
 691                          * compiler.
 692                          */
 693                         if ((ctx->i_flags & CW_F_SHADOW) && in_output) {
 694                                 newae(ctx->i_ae, discard_file_name(ctx, arg));
 695                         } else {
 696                                 newae(ctx->i_ae, arg);
 697                         }
 698                         in_output = 0;
 699                         continue;
 700                 }
 701 
 702                 if (ctx->i_flags & CW_F_CXX) {
 703                         if (strncmp(arg, "-_g++=", 6) == 0) {
 704                                 newae(ctx->i_ae, strchr(arg, '=') + 1);
 705                                 continue;
 706                         }
 707                         if (strncmp(arg, "-compat=", 8) == 0) {
 708                                 /* discard -compat=4 and -compat=5 */
 709                                 continue;
 710                         }
 711                         if (strcmp(arg, "-Qoption") == 0) {
 712                                 /* discard -Qoption and its two arguments */
 713                                 if (ctx->i_oldargc < 3)
 714                                         error(arg);
 715                                 ctx->i_oldargc -= 2;
 716                                 ctx->i_oldargv += 2;
 717                                 continue;
 718                         }
 719                         if (strcmp(arg, "-xwe") == 0) {
 720                                 /* turn warnings into errors */
 721                                 newae(ctx->i_ae, "-Werror");
 722                                 continue;
 723                         }
 724                         if (strcmp(arg, "-norunpath") == 0) {
 725                                 /* gcc has no corresponding option */
 726                                 continue;
 727                         }
 728                         if (strcmp(arg, "-nolib") == 0) {
 729                                 /* -nodefaultlibs is on by default */
 730                                 nolibc = 1;
 731                                 continue;
 732                         }
 733 #if defined(__sparc)
 734                         if (strcmp(arg, "-cg92") == 0) {
 735                                 mflag |= xlate_xtb(ctx->i_ae, "v8");
 736                                 xlate(ctx->i_ae, "super", xchip_tbl);
 737                                 continue;
 738                         }
 739 #endif  /* __sparc */
 740                 }
 741 
 742                 switch ((c = arg[1])) {
 743                 case '_':
 744                         if ((strncmp(arg, nameflag, strlen(nameflag)) == 0) ||
 745                             (strncmp(arg, "-_gcc=", 6) == 0) ||
 746                             (strncmp(arg, "-_gnu=", 6) == 0)) {
 747                                 newae(ctx->i_ae, strchr(arg, '=') + 1);
 748                         }
 749                         break;
 750                 case '#':
 751                         if (arglen == 1) {
 752                                 newae(ctx->i_ae, "-v");
 753                                 break;
 754                         }
 755                         error(arg);
 756                         break;
 757                 case 'f':
 758                         if ((strcmp(arg, "-fpic") == 0) ||
 759                             (strcmp(arg, "-fPIC") == 0)) {
 760                                 newae(ctx->i_ae, arg);
 761                                 break;
 762                         }
 763                         error(arg);
 764                         break;
 765                 case 'E':
 766                         if (arglen == 1) {
 767                                 newae(ctx->i_ae, "-xc");
 768                                 newae(ctx->i_ae, arg);
 769                                 op = CW_O_PREPROCESS;
 770                                 nolibc = 1;
 771                                 break;
 772                         }
 773                         error(arg);
 774                         break;
 775                 case 'c':
 776                 case 'S':
 777                         if (arglen == 1) {
 778                                 op = CW_O_COMPILE;
 779                                 nolibc = 1;
 780                         }
 781                         /* FALLTHROUGH */
 782                 case 'C':
 783                 case 'H':
 784                 case 'p':
 785                         if (arglen == 1) {
 786                                 newae(ctx->i_ae, arg);
 787                                 break;
 788                         }
 789                         error(arg);
 790                         break;
 791                 case 'A':
 792                 case 'g':
 793                 case 'h':
 794                 case 'I':
 795                 case 'i':
 796                 case 'L':
 797                 case 'l':
 798                 case 'R':
 799                 case 'U':
 800                 case 'u':
 801                 case 'w':
 802                         newae(ctx->i_ae, arg);
 803                         break;
 804                 case 'o':
 805                         seen_o = 1;
 806                         if (arglen == 1) {
 807                                 in_output = 1;
 808                                 newae(ctx->i_ae, arg);
 809                         } else if (ctx->i_flags & CW_F_SHADOW) {
 810                                 newae(ctx->i_ae, "-o");
 811                                 newae(ctx->i_ae, discard_file_name(ctx, arg));
 812                         } else {
 813                                 newae(ctx->i_ae, arg);
 814                         }
 815                         break;
 816                 case 'D':
 817                         newae(ctx->i_ae, arg);
 818                         /*
 819                          * XXX  Clearly a hack ... do we need _KADB too?
 820                          */
 821                         if (strcmp(arg, "-D_KERNEL") == 0 ||
 822                             strcmp(arg, "-D_BOOT") == 0)
 823                                 newae(ctx->i_ae, "-ffreestanding");
 824                         break;
 825                 case 'd':
 826                         if (arglen == 2) {
 827                                 if (strcmp(arg, "-dy") == 0) {
 828                                         newae(ctx->i_ae, "-Wl,-dy");
 829                                         break;
 830                                 }
 831                                 if (strcmp(arg, "-dn") == 0) {
 832                                         newae(ctx->i_ae, "-Wl,-dn");
 833                                         break;
 834                                 }
 835                         }
 836                         if (strcmp(arg, "-dalign") == 0) {
 837                                 /*
 838                                  * -dalign forces alignment in some cases;
 839                                  * gcc does not need any flag to do this.
 840                                  */
 841                                 break;
 842                         }
 843                         error(arg);
 844                         break;
 845                 case 'e':
 846                         if (strcmp(arg,
 847                             "-erroff=E_EMPTY_TRANSLATION_UNIT") == 0) {
 848                                 /*
 849                                  * Accept but ignore this -- gcc doesn't
 850                                  * seem to complain about empty translation
 851                                  * units
 852                                  */
 853                                 break;
 854                         }
 855                         /* XX64 -- ignore all -erroff= options, for now */
 856                         if (strncmp(arg, "-erroff=", 8) == 0)
 857                                 break;
 858                         if (strcmp(arg, "-errtags=yes") == 0) {
 859                                 warnings(ctx->i_ae);
 860                                 break;
 861                         }
 862                         if (strcmp(arg, "-errwarn=%all") == 0) {
 863                                 newae(ctx->i_ae, "-Werror");
 864                                 break;
 865                         }
 866                         error(arg);
 867                         break;
 868                 case 'G':
 869                         newae(ctx->i_ae, "-shared");
 870                         nolibc = 1;
 871                         break;
 872                 case 'k':
 873                         if (strcmp(arg, "-keeptmp") == 0) {
 874                                 newae(ctx->i_ae, "-save-temps");
 875                                 break;
 876                         }
 877                         error(arg);
 878                         break;
 879                 case 'm':
 880                         if (strcmp(arg, "-mt") == 0) {
 881                                 newae(ctx->i_ae, "-D_REENTRANT");
 882                                 break;
 883                         }
 884                         if (strcmp(arg, "-m64") == 0) {
 885                                 newae(ctx->i_ae, "-m64");
 886 #if defined(__x86)
 887                                 newae(ctx->i_ae, "-mtune=opteron");
 888 #endif
 889                                 mflag |= M64;
 890                                 break;
 891                         }
 892                         if (strcmp(arg, "-m32") == 0) {
 893                                 newae(ctx->i_ae, "-m32");
 894                                 mflag |= M32;
 895                                 break;
 896                         }
 897                         error(arg);
 898                         break;
 899                 case 'B':       /* linker options */
 900                 case 'M':
 901                 case 'z':
 902                         {
 903                                 char *opt;
 904                                 size_t len;
 905                                 char *s;
 906 
 907                                 if (arglen == 1) {
 908                                         opt = *++ctx->i_oldargv;
 909                                         if (opt == NULL || *opt == '\0')
 910                                                 error(arg);
 911                                         ctx->i_oldargc--;
 912                                 } else {
 913                                         opt = arg + 2;
 914                                 }
 915                                 len = strlen(opt) + 7;
 916                                 if ((s = malloc(len)) == NULL)
 917                                         nomem();
 918                                 (void) snprintf(s, len, "-Wl,-%c%s", c, opt);
 919                                 newae(ctx->i_ae, s);
 920                                 free(s);
 921                         }
 922                         break;
 923                 case 'O':
 924                         if (arglen == 1) {
 925                                 newae(ctx->i_ae, "-O");
 926                                 break;
 927                         }
 928                         error(arg);
 929                         break;
 930                 case 'P':
 931                         /*
 932                          * We could do '-E -o filename.i', but that's hard,
 933                          * and we don't need it for the case that's triggering
 934                          * this addition.  We'll require the user to specify
 935                          * -o in the Makefile.  If they don't they'll find out
 936                          * in a hurry.
 937                          */
 938                         newae(ctx->i_ae, "-E");
 939                         op = CW_O_PREPROCESS;
 940                         nolibc = 1;
 941                         break;
 942                 case 's':
 943                         if (arglen == 1) {
 944                                 newae(ctx->i_ae, "-Wl,-s");
 945                                 break;
 946                         }
 947                         error(arg);
 948                         break;
 949                 case 't':
 950                         if (arglen == 1) {
 951                                 newae(ctx->i_ae, "-Wl,-t");
 952                                 break;
 953                         }
 954                         error(arg);
 955                         break;
 956                 case 'V':
 957                         if (arglen == 1) {
 958                                 ctx->i_flags &= ~CW_F_ECHO;
 959                                 newae(ctx->i_ae, "--version");
 960                                 break;
 961                         }
 962                         error(arg);
 963                         break;
 964                 case 'v':
 965                         if (arglen == 1) {
 966                                 warnings(ctx->i_ae);
 967                                 break;
 968                         }
 969                         error(arg);
 970                         break;
 971                 case 'W':
 972                         if (strncmp(arg, "-Wp,-xc99", 9) == 0) {
 973                                 /*
 974                                  * gcc's preprocessor will accept c99
 975                                  * regardless, so accept and ignore.
 976                                  */
 977                                 break;
 978                         }
 979                         if (strncmp(arg, "-Wa,", 4) == 0 ||
 980                             strncmp(arg, "-Wp,", 4) == 0 ||
 981                             strncmp(arg, "-Wl,", 4) == 0) {
 982                                 newae(ctx->i_ae, arg);
 983                                 break;
 984                         }
 985                         if (strcmp(arg, "-W0,-noglobal") == 0 ||
 986                             strcmp(arg, "-W0,-xglobalstatic") == 0) {
 987                                 /*
 988                                  * gcc doesn't prefix local symbols
 989                                  * in debug mode, so this is not needed.
 990                                  */
 991                                 break;
 992                         }
 993                         if (strcmp(arg, "-W0,-Lt") == 0) {
 994                                 /*
 995                                  * Generate tests at the top of loops.
 996                                  * There is no direct gcc equivalent, ignore.
 997                                  */
 998                                 break;
 999                         }
1000                         if (strcmp(arg, "-W0,-xdbggen=no%usedonly") == 0) {
1001                                 newae(ctx->i_ae,
1002                                     "-fno-eliminate-unused-debug-symbols");
1003                                 newae(ctx->i_ae,
1004                                     "-fno-eliminate-unused-debug-types");
1005                                 break;
1006                         }
1007                         if (strcmp(arg, "-W2,-xwrap_int") == 0) {
1008                                 /*
1009                                  * Use the legacy behaviour (pre-SS11)
1010                                  * for integer wrapping.
1011                                  * gcc does not need this.
1012                                  */
1013                                 break;
1014                         }
1015                         if (strcmp(arg, "-Wd,-xsafe=unboundsym") == 0) {
1016                                 /*
1017                                  * Prevents optimizing away checks for
1018                                  * unbound weak symbol addresses.  gcc does
1019                                  * not do this, so it's not needed.
1020                                  */
1021                                 break;
1022                         }
1023                         if (strncmp(arg, "-Wc,-xcode=", 11) == 0) {
1024                                 xlate(ctx->i_ae, arg + 11, xcode_tbl);
1025                                 break;
1026                         }
1027                         if (strncmp(arg, "-Wc,-Qiselect", 13) == 0) {
1028                                 /*
1029                                  * Prevents insertion of register symbols.
1030                                  * gcc doesn't do this, so ignore it.
1031                                  */
1032                                 break;
1033                         }
1034                         if (strcmp(arg, "-Wc,-Qassembler-ounrefsym=0") == 0) {
1035                                 /*
1036                                  * Prevents optimizing away of static variables.
1037                                  * gcc does not do this, so it's not needed.
1038                                  */
1039                                 break;
1040                         }
1041 #if defined(__x86)
1042                         if (strcmp(arg, "-Wu,-save_args") == 0) {
1043                                 newae(ctx->i_ae, "-msave-args");
1044                                 break;
1045                         }
1046 #endif  /* __x86 */
1047                         error(arg);
1048                         break;
1049                 case 'X':
1050                         if (strcmp(arg, "-Xa") == 0 ||
1051                             strcmp(arg, "-Xt") == 0) {
1052                                 break;
1053                         }
1054                         if (strcmp(arg, "-Xs") == 0) {
1055                                 Xsmode(ctx->i_ae);
1056                                 break;
1057                         }
1058                         error(arg);
1059                         break;
1060                 case 'x':
1061                         if (arglen == 1)
1062                                 error(arg);
1063                         switch (arg[2]) {
1064                         case 'a':
1065                                 if (strncmp(arg, "-xarch=", 7) == 0) {
1066                                         mflag |= xlate_xtb(ctx->i_ae, arg + 7);
1067                                         break;
1068                                 }
1069                                 error(arg);
1070                                 break;
1071                         case 'b':
1072                                 if (strncmp(arg, "-xbuiltin=", 10) == 0) {
1073                                         if (strcmp(arg + 10, "%all"))
1074                                                 newae(ctx->i_ae, "-fbuiltin");
1075                                         break;
1076                                 }
1077                                 error(arg);
1078                                 break;
1079                         case 'C':
1080                                 /* Accept C++ style comments -- ignore */
1081                                 if (strcmp(arg, "-xCC") == 0)
1082                                         break;
1083                                 error(arg);
1084                                 break;
1085                         case 'c':
1086                                 if (strncmp(arg, "-xc99=%all", 10) == 0) {
1087                                         newae(ctx->i_ae, "-std=gnu99");
1088                                         break;
1089                                 }
1090                                 if (strncmp(arg, "-xc99=%none", 11) == 0) {
1091                                         newae(ctx->i_ae, "-std=gnu89");
1092                                         break;
1093                                 }
1094                                 if (strncmp(arg, "-xchip=", 7) == 0) {
1095                                         xlate(ctx->i_ae, arg + 7, xchip_tbl);
1096                                         break;
1097                                 }
1098                                 if (strncmp(arg, "-xcode=", 7) == 0) {
1099                                         xlate(ctx->i_ae, arg + 7, xcode_tbl);
1100                                         break;
1101                                 }
1102                                 if (strncmp(arg, "-xcrossfile", 11) == 0)
1103                                         break;
1104                                 error(arg);
1105                                 break;
1106                         case 'F':
1107                                 /*
1108                                  * Compile for mapfile reordering, or unused
1109                                  * section elimination, syntax can be -xF or
1110                                  * more complex, like -xF=%all -- ignore.
1111                                  */
1112                                 if (strncmp(arg, "-xF", 3) == 0)
1113                                         break;
1114                                 error(arg);
1115                                 break;
1116                         case 'i':
1117                                 if (strncmp(arg, "-xinline", 8) == 0)
1118                                         /* No inlining; ignore */
1119                                         break;
1120                                 if (strcmp(arg, "-xildon") == 0 ||
1121                                     strcmp(arg, "-xildoff") == 0)
1122                                         /* No incremental linking; ignore */
1123                                         break;
1124                                 error(arg);
1125                                 break;
1126 #if defined(__x86)
1127                         case 'm':
1128                                 if (strcmp(arg, "-xmodel=kernel") == 0) {
1129                                         newae(ctx->i_ae, "-ffreestanding");
1130                                         newae(ctx->i_ae, "-mno-red-zone");
1131                                         model = "-mcmodel=kernel";
1132                                         nolibc = 1;
1133                                         break;
1134                                 }
1135                                 error(arg);
1136                                 break;
1137 #endif  /* __x86 */
1138                         case 'O':
1139                                 if (strncmp(arg, "-xO", 3) == 0) {
1140                                         size_t len = strlen(arg);
1141                                         char *s = NULL;
1142                                         int c = *(arg + 3);
1143                                         int level;
1144 
1145                                         if (len != 4 || !isdigit(c))
1146                                                 error(arg);
1147 
1148                                         level = atoi(arg + 3);
1149                                         if (level > 5)
1150                                                 error(arg);
1151                                         if (level >= 2) {
1152                                                 /*
1153                                                  * For gcc-3.4.x at -O2 we
1154                                                  * need to disable optimizations
1155                                                  * that break ON.
1156                                                  */
1157                                                 optim_disable(ctx->i_ae, level);
1158                                                 /*
1159                                                  * limit -xO3 to -O2 as well.
1160                                                  */
1161                                                 level = 2;
1162                                         }
1163                                         if (asprintf(&s, "-O%d", level) == -1)
1164                                                 nomem();
1165                                         newae(ctx->i_ae, s);
1166                                         free(s);
1167                                         break;
1168                                 }
1169                                 error(arg);
1170                                 break;
1171                         case 'r':
1172                                 if (strncmp(arg, "-xregs=", 7) == 0) {
1173                                         xlate(ctx->i_ae, arg + 7, xregs_tbl);
1174                                         break;
1175                                 }
1176                                 error(arg);
1177                                 break;
1178                         case 's':
1179                                 if (strcmp(arg, "-xs") == 0 ||
1180                                     strcmp(arg, "-xspace") == 0 ||
1181                                     strcmp(arg, "-xstrconst") == 0)
1182                                         break;
1183                                 error(arg);
1184                                 break;
1185                         case 't':
1186                                 if (strncmp(arg, "-xtarget=", 9) == 0) {
1187                                         xlate(ctx->i_ae, arg + 9, xtarget_tbl);
1188                                         break;
1189                                 }
1190                                 error(arg);
1191                                 break;
1192                         case 'e':
1193                         case 'h':
1194                         case 'l':
1195                         default:
1196                                 error(arg);
1197                                 break;
1198                         }
1199                         break;
1200                 case 'Y':
1201                         if (arglen == 1) {
1202                                 if ((arg = *++ctx->i_oldargv) == NULL ||
1203                                     *arg == '\0')
1204                                         error("-Y");
1205                                 ctx->i_oldargc--;
1206                                 arglen = strlen(arg + 1);
1207                         } else {
1208                                 arg += 2;
1209                         }
1210                         /* Just ignore -YS,... for now */
1211                         if (strncmp(arg, "S,", 2) == 0)
1212                                 break;
1213                         if (strncmp(arg, "I,", 2) == 0) {
1214                                 char *s = strdup(arg);
1215                                 s[0] = '-';
1216                                 s[1] = 'I';
1217                                 newae(ctx->i_ae, "-nostdinc");
1218                                 newae(ctx->i_ae, s);
1219                                 free(s);
1220                                 break;
1221                         }
1222                         error(arg);
1223                         break;
1224                 case 'Q':
1225                         /*
1226                          * We could map -Qy into -Wl,-Qy etc.
1227                          */
1228                 default:
1229                         error(arg);
1230                         break;
1231                 }
1232         }
1233 
1234         free(nameflag);
1235 
1236         /*
1237          * When compiling multiple source files in a single invocation some
1238          * compilers output objects into the current directory with
1239          * predictable and conventional names.
1240          *
1241          * We prevent any attempt to compile multiple files at once so that
1242          * any such objects created by a shadow can't escape into a later
1243          * link-edit.
1244          */
1245         if (c_files > 1 && op != CW_O_PREPROCESS) {
1246                 errx(2, "multiple source files are "
1247                     "allowed only with -E or -P");
1248         }
1249 
1250         /*
1251          * Make sure that we do not have any unintended interactions between
1252          * the xarch options passed in and the version of the Studio compiler
1253          * used.
1254          */
1255         if ((mflag & (SS11|SS12)) == (SS11|SS12)) {
1256                 errx(2,
1257                     "Conflicting \"-xarch=\" flags (both Studio 11 and 12)\n");
1258         }
1259 
1260         switch (mflag) {
1261         case 0:
1262                 /* FALLTHROUGH */
1263         case M32:
1264 #if defined(__sparc)
1265                 /*
1266                  * Only -m32 is defined and so put in the missing xarch
1267                  * translation.
1268                  */
1269                 newae(ctx->i_ae, "-mcpu=v8");
1270                 newae(ctx->i_ae, "-mno-v8plus");
1271 #endif
1272                 break;
1273         case M64:
1274 #if defined(__sparc)
1275                 /*
1276                  * Only -m64 is defined and so put in the missing xarch
1277                  * translation.
1278                  */
1279                 newae(ctx->i_ae, "-mcpu=v9");
1280 #endif
1281                 break;
1282         case SS12:
1283 #if defined(__sparc)
1284                 /* no -m32/-m64 flag used - this is an error for sparc builds */
1285                 (void) fprintf(stderr, "No -m32/-m64 flag defined\n");
1286                 exit(2);
1287 #endif
1288                 break;
1289         case SS11:
1290                 /* FALLTHROUGH */
1291         case (SS11|M32):
1292         case (SS11|M64):
1293                 break;
1294         case (SS12|M32):
1295 #if defined(__sparc)
1296                 /*
1297                  * Need to add in further 32 bit options because with SS12
1298                  * the xarch=sparcvis option can be applied to 32 or 64
1299                  * bit, and so the translatation table (xtbl) cannot handle
1300                  * that.
1301                  */
1302                 newae(ctx->i_ae, "-mv8plus");
1303 #endif
1304                 break;
1305         case (SS12|M64):
1306                 break;
1307         default:
1308                 (void) fprintf(stderr,
1309                     "Incompatible -xarch= and/or -m32/-m64 options used.\n");
1310                 exit(2);
1311         }
1312 
1313         if (ctx->i_flags & CW_F_SHADOW) {
1314                 if (op == CW_O_PREPROCESS)
1315                         exit(0);
1316                 else if (op == CW_O_LINK && c_files == 0)
1317                         exit(0);
1318         }
1319 
1320         if (model != NULL)
1321                 newae(ctx->i_ae, model);
1322         if (!nolibc)
1323                 newae(ctx->i_ae, "-lc");
1324         if (!seen_o && (ctx->i_flags & CW_F_SHADOW)) {
1325                 newae(ctx->i_ae, "-o");
1326                 newae(ctx->i_ae, discard_file_name(ctx, NULL));
1327         }
1328 }
1329 
1330 static void
1331 do_smatch(cw_ictx_t *ctx)
1332 {
1333         if (ctx->i_flags & CW_F_PROG) {
1334                 newae(ctx->i_ae, "--version");
1335                 return;
1336         }
1337 
1338         /*
1339          * Some sources shouldn't run smatch at all.
1340          */
1341         for (int i = 0; i < ctx->i_oldargc; i++) {
1342                 char *arg = ctx->i_oldargv[i];
1343 
1344                 if (strcmp(arg, "-_smatch=off") == 0) {
1345                         ctx->i_flags &= ~ (CW_F_EXEC | CW_F_ECHO);
1346                         return;
1347                 }
1348         }
1349 
1350         /*
1351          * smatch can handle gcc's options.
1352          */
1353         do_gcc(ctx);
1354 }
1355 
1356 static void
1357 do_cc(cw_ictx_t *ctx)
1358 {
1359         int in_output = 0, seen_o = 0, c_files = 0;
1360         cw_op_t op = CW_O_LINK;
1361         char *nameflag;
1362 
1363         if (ctx->i_flags & CW_F_PROG) {
1364                 newae(ctx->i_ae, "-V");
1365                 return;
1366         }
1367 
1368         if (asprintf(&nameflag, "-_%s=", ctx->i_compiler->c_name) == -1)
1369                 nomem();
1370 
1371         while (--ctx->i_oldargc > 0) {
1372                 char *arg = *++ctx->i_oldargv;
1373 
1374                 if (strncmp(arg, "-_CC=", 5) == 0) {
1375                         newae(ctx->i_ae, strchr(arg, '=') + 1);
1376                         continue;
1377                 }
1378 
1379                 if (*arg != '-') {
1380                         if (!in_output && is_source_file(arg))
1381                                 c_files++;
1382 
1383                         if (in_output == 0 || !(ctx->i_flags & CW_F_SHADOW)) {
1384                                 newae(ctx->i_ae, arg);
1385                         } else {
1386                                 in_output = 0;
1387                                 newae(ctx->i_ae, discard_file_name(ctx, arg));
1388                         }
1389                         continue;
1390                 }
1391                 switch (*(arg + 1)) {
1392                 case '_':
1393                         if ((strncmp(arg, nameflag, strlen(nameflag)) == 0) ||
1394                             (strncmp(arg, "-_cc=", 5) == 0) ||
1395                             (strncmp(arg, "-_sun=", 6) == 0)) {
1396                                 newae(ctx->i_ae, strchr(arg, '=') + 1);
1397                         }
1398                         break;
1399 
1400                 case 'V':
1401                         ctx->i_flags &= ~CW_F_ECHO;
1402                         newae(ctx->i_ae, arg);
1403                         break;
1404                 case 'o':
1405                         seen_o = 1;
1406                         if (strlen(arg) == 2) {
1407                                 in_output = 1;
1408                                 newae(ctx->i_ae, arg);
1409                         } else if (ctx->i_flags & CW_F_SHADOW) {
1410                                 newae(ctx->i_ae, "-o");
1411                                 newae(ctx->i_ae, discard_file_name(ctx, arg));
1412                         } else {
1413                                 newae(ctx->i_ae, arg);
1414                         }
1415                         break;
1416                 case 'c':
1417                 case 'S':
1418                         if (strlen(arg) == 2)
1419                                 op = CW_O_COMPILE;
1420                         newae(ctx->i_ae, arg);
1421                         break;
1422                 case 'E':
1423                 case 'P':
1424                         if (strlen(arg) == 2)
1425                                 op = CW_O_PREPROCESS;
1426                 /*FALLTHROUGH*/
1427                 default:
1428                         newae(ctx->i_ae, arg);
1429                 }
1430         }
1431 
1432         free(nameflag);
1433 
1434         /* See the comment on this same code in do_gcc() */
1435         if (c_files > 1 && op != CW_O_PREPROCESS) {
1436                 errx(2, "multiple source files are "
1437                     "allowed only with -E or -P");
1438         }
1439 
1440         if (ctx->i_flags & CW_F_SHADOW) {
1441                 if (op == CW_O_PREPROCESS)
1442                         exit(0);
1443                 else if (op == CW_O_LINK && c_files == 0)
1444                         exit(0);
1445         }
1446 
1447         if (!seen_o && (ctx->i_flags & CW_F_SHADOW)) {
1448                 newae(ctx->i_ae, "-o");
1449                 newae(ctx->i_ae, discard_file_name(ctx, NULL));
1450         }
1451 }
1452 
1453 static void
1454 prepctx(cw_ictx_t *ctx)
1455 {
1456         newae(ctx->i_ae, ctx->i_compiler->c_path);
1457 
1458         if (ctx->i_flags & CW_F_PROG) {
1459                 (void) printf("%s: %s\n", (ctx->i_flags & CW_F_SHADOW) ?
1460                     "shadow" : "primary", ctx->i_compiler->c_path);
1461                 (void) fflush(stdout);
1462         }
1463 
1464         if (ctx->i_linker != NULL)
1465                 setenv("LD_ALTEXEC", ctx->i_linker, 1);
1466 
1467         if (!(ctx->i_flags & CW_F_XLATE))
1468                 return;
1469 
1470         switch (ctx->i_compiler->c_style) {
1471         case SUN:
1472                 do_cc(ctx);
1473                 break;
1474         case GNU:
1475                 do_gcc(ctx);
1476                 break;
1477         case SMATCH:
1478                 do_smatch(ctx);
1479                 break;
1480         }
1481 }
1482 
1483 static int
1484 invoke(cw_ictx_t *ctx)
1485 {
1486         char **newargv;
1487         int ac;
1488         struct ae *a;
1489 
1490         if ((newargv = calloc(sizeof (*newargv), ctx->i_ae->ael_argc + 1)) ==
1491             NULL)
1492                 nomem();
1493 
1494         if (ctx->i_flags & CW_F_ECHO)
1495                 (void) fprintf(stderr, "+ ");
1496 
1497         for (ac = 0, a = ctx->i_ae->ael_head; a; a = a->ae_next, ac++) {
1498                 newargv[ac] = a->ae_arg;
1499                 if (ctx->i_flags & CW_F_ECHO)
1500                         (void) fprintf(stderr, "%s ", a->ae_arg);
1501                 if (a == ctx->i_ae->ael_tail)
1502                         break;
1503         }
1504 
1505         if (ctx->i_flags & CW_F_ECHO) {
1506                 (void) fprintf(stderr, "\n");
1507                 (void) fflush(stderr);
1508         }
1509 
1510         if (!(ctx->i_flags & CW_F_EXEC))
1511                 return (0);
1512 
1513         /*
1514          * We must fix up the environment here so that the dependency files are
1515          * not trampled by the shadow compiler. Also take care of GCC
1516          * environment variables that will throw off gcc. This assumes a primary
1517          * gcc.
1518          */
1519         if ((ctx->i_flags & CW_F_SHADOW) &&
1520             (unsetenv("SUNPRO_DEPENDENCIES") != 0 ||
1521             unsetenv("DEPENDENCIES_OUTPUT") != 0 ||
1522             unsetenv("GCC_ROOT") != 0)) {
1523                 (void) fprintf(stderr, "error: environment setup failed: %s\n",
1524                     strerror(errno));
1525                 return (-1);
1526         }
1527 
1528         (void) execv(newargv[0], newargv);
1529         warn("couldn't run %s", newargv[0]);
1530 
1531         return (-1);
1532 }
1533 
1534 static int
1535 reap(cw_ictx_t *ctx)
1536 {
1537         int status, ret = 0;
1538         char buf[1024];
1539         struct stat s;
1540 
1541         /*
1542          * Only wait for one specific child.
1543          */
1544         if (ctx->i_pid <= 0)
1545                 return (-1);
1546 
1547         do {
1548                 if (waitpid(ctx->i_pid, &status, 0) < 0) {
1549                         warn("cannot reap child");
1550                         return (-1);
1551                 }
1552                 if (status != 0) {
1553                         if (WIFSIGNALED(status)) {
1554                                 ret = -WTERMSIG(status);
1555                                 break;
1556                         } else if (WIFEXITED(status)) {
1557                                 ret = WEXITSTATUS(status);
1558                                 break;
1559                         }
1560                 }
1561         } while (!WIFEXITED(status) && !WIFSIGNALED(status));
1562 
1563         if (stat(ctx->i_stderr, &s) < 0) {
1564                 warn("stat failed on child cleanup");
1565                 return (-1);
1566         }
1567         if (s.st_size != 0) {
1568                 FILE *f;
1569 
1570                 if ((f = fopen(ctx->i_stderr, "r")) != NULL) {
1571                         while (fgets(buf, sizeof (buf), f))
1572                                 (void) fprintf(stderr, "%s", buf);
1573                         (void) fflush(stderr);
1574                         (void) fclose(f);
1575                 }
1576         }
1577         (void) unlink(ctx->i_stderr);
1578         free(ctx->i_stderr);
1579 
1580         /*
1581          * cc returns an error code when given -V; we want that to succeed.
1582          */
1583         if (ctx->i_flags & CW_F_PROG)
1584                 return (0);
1585 
1586         return (ret);
1587 }
1588 
1589 static int
1590 exec_ctx(cw_ictx_t *ctx, int block)
1591 {
1592         if ((ctx->i_stderr = tempnam(ctx->i_tmpdir, "cw")) == NULL) {
1593                 nomem();
1594                 return (-1);
1595         }
1596 
1597         if ((ctx->i_pid = fork()) == 0) {
1598                 int fd;
1599 
1600                 (void) fclose(stderr);
1601                 if ((fd = open(ctx->i_stderr, O_WRONLY | O_CREAT | O_EXCL,
1602                     0666)) < 0) {
1603                         err(1, "open failed for standard error");
1604                 }
1605                 if (dup2(fd, 2) < 0) {
1606                         err(1, "dup2 failed for standard error");
1607                 }
1608                 if (fd != 2)
1609                         (void) close(fd);
1610                 if (freopen("/dev/fd/2", "w", stderr) == NULL) {
1611                         err(1, "freopen failed for /dev/fd/2");
1612                 }
1613 
1614                 prepctx(ctx);
1615                 exit(invoke(ctx));
1616         }
1617 
1618         if (ctx->i_pid < 0) {
1619                 err(1, "fork failed");
1620         }
1621 
1622         if (block)
1623                 return (reap(ctx));
1624 
1625         return (0);
1626 }
1627 
1628 static void
1629 parse_compiler(const char *spec, cw_compiler_t *compiler)
1630 {
1631         char *tspec, *token;
1632 
1633         if ((tspec = strdup(spec)) == NULL)
1634                 nomem();
1635 
1636         if ((token = strsep(&tspec, ",")) == NULL)
1637                 errx(1, "Compiler is missing a name: %s", spec);
1638         compiler->c_name = token;
1639 
1640         if ((token = strsep(&tspec, ",")) == NULL)
1641                 errx(1, "Compiler is missing a path: %s", spec);
1642         compiler->c_path = token;
1643 
1644         if ((token = strsep(&tspec, ",")) == NULL)
1645                 errx(1, "Compiler is missing a style: %s", spec);
1646 
1647         if ((strcasecmp(token, "gnu") == 0) ||
1648             (strcasecmp(token, "gcc") == 0)) {
1649                 compiler->c_style = GNU;
1650         } else if ((strcasecmp(token, "sun") == 0) ||
1651             (strcasecmp(token, "cc") == 0)) {
1652                 compiler->c_style = SUN;
1653         } else if ((strcasecmp(token, "smatch") == 0)) {
1654                 compiler->c_style = SMATCH;
1655         } else {
1656                 errx(1, "unknown compiler style: %s", token);
1657         }
1658 
1659         if (tspec != NULL)
1660                 errx(1, "Excess tokens in compiler: %s", spec);
1661 }
1662 
1663 static void
1664 cleanup(cw_ictx_t *ctx)
1665 {
1666         DIR *dirp;
1667         struct dirent *dp;
1668         char buf[MAXPATHLEN];
1669 
1670         if ((dirp = opendir(ctx->i_tmpdir)) == NULL) {
1671                 if (errno != ENOENT) {
1672                         err(1, "couldn't open temp directory: %s",
1673                             ctx->i_tmpdir);
1674                 } else {
1675                         return;
1676                 }
1677         }
1678 
1679         errno = 0;
1680         while ((dp = readdir(dirp)) != NULL) {
1681                 (void) snprintf(buf, MAXPATHLEN, "%s/%s", ctx->i_tmpdir,
1682                     dp->d_name);
1683 
1684                 if (strcmp(dp->d_name, ".") == 0 ||
1685                     strcmp(dp->d_name, "..") == 0) {
1686                         continue;
1687                 }
1688 
1689                 if (unlink(buf) == -1)
1690                         err(1, "failed to unlink temp file: %s", dp->d_name);
1691                 errno = 0;
1692         }
1693 
1694         if (errno != 0) {
1695                 err(1, "failed to read temporary directory: %s",
1696                     ctx->i_tmpdir);
1697         }
1698 
1699         (void) closedir(dirp);
1700         if (rmdir(ctx->i_tmpdir) != 0) {
1701                 err(1, "failed to unlink temporary directory: %s",
1702                     ctx->i_tmpdir);
1703         }
1704 }
1705 
1706 int
1707 main(int argc, char **argv)
1708 {
1709         int ch;
1710         cw_compiler_t primary = { NULL, NULL, 0 };
1711         cw_compiler_t shadows[10];
1712         int nshadows = 0;
1713         int ret = 0;
1714         boolean_t do_serial = B_FALSE;
1715         boolean_t do_exec = B_FALSE;
1716         boolean_t vflg = B_FALSE;
1717         boolean_t Cflg = B_FALSE;
1718         boolean_t cflg = B_FALSE;
1719         boolean_t nflg = B_FALSE;
1720         char *tmpdir;
1721 
1722         cw_ictx_t *main_ctx;
1723 
1724         static struct option longopts[] = {
1725                 { "compiler", no_argument, NULL, 'c' },
1726                 { "linker", required_argument, NULL, 'l' },
1727                 { "noecho", no_argument, NULL, 'n' },
1728                 { "primary", required_argument, NULL, 'p' },
1729                 { "shadow", required_argument, NULL, 's' },
1730                 { "versions", no_argument, NULL, 'v' },
1731                 { NULL, 0, NULL, 0 },
1732         };
1733 
1734 
1735         if ((main_ctx = newictx()) == NULL)
1736                 nomem();
1737 
1738         while ((ch = getopt_long(argc, argv, "C", longopts, NULL)) != -1) {
1739                 switch (ch) {
1740                 case 'c':
1741                         cflg = B_TRUE;
1742                         break;
1743                 case 'C':
1744                         Cflg = B_TRUE;
1745                         break;
1746                 case 'l':
1747                         if ((main_ctx->i_linker = strdup(optarg)) == NULL)
1748                                 nomem();
1749                         break;
1750                 case 'n':
1751                         nflg = B_TRUE;
1752                         break;
1753                 case 'p':
1754                         if (primary.c_path != NULL) {
1755                                 warnx("Only one primary compiler may "
1756                                     "be specified");
1757                                 usage();
1758                         }
1759 
1760                         parse_compiler(optarg, &primary);
1761                         break;
1762                 case 's':
1763                         if (nshadows >= 10)
1764                                 errx(1, "May only use 10 shadows at "
1765                                     "the moment");
1766                         parse_compiler(optarg, &shadows[nshadows]);
1767                         nshadows++;
1768                         break;
1769                 case 'v':
1770                         vflg = B_TRUE;
1771                         break;
1772                 default:
1773                         (void) fprintf(stderr, "Did you forget '--'?\n");
1774                         usage();
1775                 }
1776         }
1777 
1778         if (primary.c_path == NULL) {
1779                 warnx("A primary compiler must be specified");
1780                 usage();
1781         }
1782 
1783         do_serial = (getenv("CW_SHADOW_SERIAL") == NULL) ? B_FALSE : B_TRUE;
1784         do_exec = (getenv("CW_NO_EXEC") == NULL) ? B_TRUE : B_FALSE;
1785 
1786         /* Leave room for argv[0] */
1787         argc -= (optind - 1);
1788         argv += (optind - 1);
1789 
1790         main_ctx->i_oldargc = argc;
1791         main_ctx->i_oldargv = argv;
1792         main_ctx->i_flags = CW_F_XLATE;
1793         if (nflg == 0)
1794                 main_ctx->i_flags |= CW_F_ECHO;
1795         if (do_exec)
1796                 main_ctx->i_flags |= CW_F_EXEC;
1797         if (Cflg)
1798                 main_ctx->i_flags |= CW_F_CXX;
1799         main_ctx->i_compiler = &primary;
1800 
1801         if (cflg) {
1802                 (void) fputs(primary.c_path, stdout);
1803         }
1804 
1805         if (vflg) {
1806                 (void) printf("cw version %s\n", CW_VERSION);
1807                 (void) fflush(stdout);
1808                 main_ctx->i_flags &= ~CW_F_ECHO;
1809                 main_ctx->i_flags |= CW_F_PROG | CW_F_EXEC;
1810                 do_serial = 1;
1811         }
1812 
1813         tmpdir = getenv("TMPDIR");
1814         if (tmpdir == NULL)
1815                 tmpdir = "/tmp";
1816 
1817         if (asprintf(&main_ctx->i_tmpdir, "%s/cw.XXXXXX", tmpdir) == -1)
1818                 nomem();
1819 
1820         if ((main_ctx->i_tmpdir = mkdtemp(main_ctx->i_tmpdir)) == NULL)
1821                 errx(1, "failed to create temporary directory");
1822 
1823         ret |= exec_ctx(main_ctx, do_serial);
1824 
1825         for (int i = 0; i < nshadows; i++) {
1826                 int r;
1827                 cw_ictx_t *shadow_ctx;
1828 
1829                 if ((shadow_ctx = newictx()) == NULL)
1830                         nomem();
1831 
1832                 (void) memcpy(shadow_ctx, main_ctx, sizeof (cw_ictx_t));
1833 
1834                 shadow_ctx->i_flags |= CW_F_SHADOW;
1835                 shadow_ctx->i_compiler = &shadows[i];
1836 
1837                 r = exec_ctx(shadow_ctx, do_serial);
1838                 if (r == 0) {
1839                         shadow_ctx->i_next = main_ctx->i_next;
1840                         main_ctx->i_next = shadow_ctx;
1841                 }
1842                 ret |= r;
1843         }
1844 
1845         if (!do_serial) {
1846                 cw_ictx_t *next = main_ctx;
1847                 while (next != NULL) {
1848                         cw_ictx_t *toreap = next;
1849                         next = next->i_next;
1850                         ret |= reap(toreap);
1851                 }
1852         }
1853 
1854         cleanup(main_ctx);
1855         return (ret);
1856 }