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 2018 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      "3.0"
  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  * -xdebugformat=<format> ignore (always use dwarf-2 for gcc)
 221  * -xcrossfile[=<n>]              ignore
 222  * -xe                          error
 223  * -xF                          error
 224  * -xhelp=<f>                     error
 225  * -xildoff                     ignore
 226  * -xildon                      ignore
 227  * -xinline                     ignore
 228  * -xlibmieee                   error
 229  * -xlibmil                     error
 230  * -xlic_lib=sunperf            error
 231  * -xmaxopt=[...]               error
 232  * -xO<n>                 -O<n>
 233  * -xP                          error
 234  * -xprofile=<p>          error
 235  * -xregs=<r>                     table
 236  * -xs                          error
 237  * -xsb                         error
 238  * -xsbfast                     error
 239  * -xsfpconst                   error
 240  * -xspace                      ignore (-not -Os)
 241  * -xstrconst                   ignore
 242  * -xtarget=<t>                   table
 243  * -xtemp=<dir>                   error
 244  * -xtime                       error
 245  * -xtransition                 -Wtransition
 246  * -xunroll=n                   error
 247  * -W0,-xdbggen=no%usedonly     -fno-eliminate-unused-debug-symbols
 248  *                              -fno-eliminate-unused-debug-types
 249  * -Y<c>,<dir>                      error
 250  * -YA,<dir>                      error
 251  * -YI,<dir>                      -nostdinc -I<dir>
 252  * -YP,<dir>                      error
 253  * -YS,<dir>                      error
 254  */
 255 
 256 #include <ctype.h>
 257 #include <err.h>
 258 #include <errno.h>
 259 #include <fcntl.h>
 260 #include <getopt.h>
 261 #include <stdio.h>
 262 #include <stdlib.h>
 263 #include <string.h>
 264 #include <unistd.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         struct aelist   *i_ae;
 310         uint32_t        i_flags;
 311         int             i_oldargc;
 312         char            **i_oldargv;
 313         pid_t           i_pid;
 314         char            i_discard[MAXPATHLEN];
 315         char            *i_stderr;
 316 } cw_ictx_t;
 317 
 318 /*
 319  * Status values to indicate which Studio compiler and associated
 320  * flags are being used.
 321  */
 322 #define M32             0x01    /* -m32 - only on Studio 12 */
 323 #define M64             0x02    /* -m64 - only on Studio 12 */
 324 #define SS11            0x100   /* Studio 11 */
 325 #define SS12            0x200   /* Studio 12 */
 326 
 327 #define TRANS_ENTRY     5
 328 /*
 329  * Translation table definition for the -xarch= flag. The "x_arg"
 330  * value is translated into the appropriate gcc flags according
 331  * to the values in x_trans[n]. The x_flags indicates what compiler
 332  * is being used and what flags have been set via the use of
 333  * "x_arg".
 334  */
 335 typedef struct xarch_table {
 336         char    *x_arg;
 337         int     x_flags;
 338         char    *x_trans[TRANS_ENTRY];
 339 } xarch_table_t;
 340 
 341 /*
 342  * The translation table for the -xarch= flag used in the Studio compilers.
 343  */
 344 static const xarch_table_t xtbl[] = {
 345 #if defined(__x86)
 346         { "generic",    SS11, {NULL} },
 347         { "generic64",  (SS11|M64), { "-m64", "-mtune=opteron" } },
 348         { "amd64",      (SS11|M64), { "-m64", "-mtune=opteron" } },
 349         { "386",        SS11,   { "-march=i386" } },
 350         { "pentium_pro", SS11,  { "-march=pentiumpro" } },
 351         { "sse",        SS11, { "-msse", "-mfpmath=sse" } },
 352         { "sse2",       SS11, { "-msse2", "-mfpmath=sse" } },
 353 #elif defined(__sparc)
 354         { "generic",    (SS11|M32), { "-m32", "-mcpu=v8" } },
 355         { "generic64",  (SS11|M64), { "-m64", "-mcpu=v9" } },
 356         { "v8",         (SS11|M32), { "-m32", "-mcpu=v8", "-mno-v8plus" } },
 357         { "v8plus",     (SS11|M32), { "-m32", "-mcpu=v9", "-mv8plus" } },
 358         { "v8plusa",    (SS11|M32), { "-m32", "-mcpu=ultrasparc", "-mv8plus",
 359                         "-mvis" } },
 360         { "v8plusb",    (SS11|M32), { "-m32", "-mcpu=ultrasparc3", "-mv8plus",
 361                         "-mvis" } },
 362         { "v9",         (SS11|M64), { "-m64", "-mcpu=v9" } },
 363         { "v9a",        (SS11|M64), { "-m64", "-mcpu=ultrasparc", "-mvis" } },
 364         { "v9b",        (SS11|M64), { "-m64", "-mcpu=ultrasparc3", "-mvis" } },
 365         { "sparc",      SS12, { "-mcpu=v9", "-mv8plus" } },
 366         { "sparcvis",   SS12, { "-mcpu=ultrasparc", "-mvis" } },
 367         { "sparcvis2",  SS12, { "-mcpu=ultrasparc3", "-mvis" } }
 368 #endif
 369 };
 370 
 371 static int xtbl_size = sizeof (xtbl) / sizeof (xarch_table_t);
 372 
 373 static const char *xchip_tbl[] = {
 374 #if defined(__x86)
 375         "386",          "-mtune=i386", NULL,
 376         "486",          "-mtune=i486", NULL,
 377         "pentium",      "-mtune=pentium", NULL,
 378         "pentium_pro",  "-mtune=pentiumpro", NULL,
 379 #elif defined(__sparc)
 380         "super",        "-mtune=supersparc", NULL,
 381         "ultra",        "-mtune=ultrasparc", NULL,
 382         "ultra3",       "-mtune=ultrasparc3", NULL,
 383 #endif
 384         NULL,           NULL
 385 };
 386 
 387 static const char *xcode_tbl[] = {
 388 #if defined(__sparc)
 389         "abs32",        "-fno-pic", "-mcmodel=medlow", NULL,
 390         "abs44",        "-fno-pic", "-mcmodel=medmid", NULL,
 391         "abs64",        "-fno-pic", "-mcmodel=medany", NULL,
 392         "pic13",        "-fpic", NULL,
 393         "pic32",        "-fPIC", NULL,
 394 #endif
 395         NULL,           NULL
 396 };
 397 
 398 static const char *xtarget_tbl[] = {
 399 #if defined(__x86)
 400         "pentium_pro",  "-march=pentiumpro", NULL,
 401 #endif  /* __x86 */
 402         NULL,           NULL
 403 };
 404 
 405 static const char *xregs_tbl[] = {
 406 #if defined(__sparc)
 407         "appl",         "-mapp-regs", NULL,
 408         "no%appl",      "-mno-app-regs", NULL,
 409         "float",        "-mfpu", NULL,
 410         "no%float",     "-mno-fpu", NULL,
 411 #endif  /* __sparc */
 412         NULL,           NULL
 413 };
 414 
 415 static void
 416 nomem(void)
 417 {
 418         errx(1, "out of memory");
 419 }
 420 
 421 static void
 422 newae(struct aelist *ael, const char *arg)
 423 {
 424         struct ae *ae;
 425 
 426         if ((ae = calloc(sizeof (*ae), 1)) == NULL)
 427                 nomem();
 428         ae->ae_arg = strdup(arg);
 429         if (ael->ael_tail == NULL)
 430                 ael->ael_head = ae;
 431         else
 432                 ael->ael_tail->ae_next = ae;
 433         ael->ael_tail = ae;
 434         ael->ael_argc++;
 435 }
 436 
 437 static cw_ictx_t *
 438 newictx(void)
 439 {
 440         cw_ictx_t *ctx = calloc(sizeof (cw_ictx_t), 1);
 441         if (ctx)
 442                 if ((ctx->i_ae = calloc(sizeof (struct aelist), 1)) == NULL) {
 443                         free(ctx);
 444                         return (NULL);
 445                 }
 446 
 447         return (ctx);
 448 }
 449 
 450 static void
 451 error(const char *arg)
 452 {
 453         errx(2, "error: mapping failed at or near arg '%s'", arg);
 454 }
 455 
 456 /*
 457  * Add the current favourite set of warnings to the gcc invocation.
 458  */
 459 static void
 460 warnings(struct aelist *h)
 461 {
 462         static int warningsonce;
 463 
 464         if (warningsonce++)
 465                 return;
 466 
 467         /*
 468          * Enable as many warnings as exist, then disable those that we never
 469          * ever want.
 470          */
 471         newae(h, "-Wall");
 472         newae(h, "-Wextra");
 473 }
 474 
 475 static void
 476 optim_disable(struct aelist *h, int level)
 477 {
 478         if (level >= 2) {
 479                 newae(h, "-fno-strict-aliasing");
 480                 newae(h, "-fno-unit-at-a-time");
 481                 newae(h, "-fno-optimize-sibling-calls");
 482         }
 483 }
 484 
 485 static void
 486 Xsmode(struct aelist *h)
 487 {
 488         static int xsonce;
 489 
 490         if (xsonce++)
 491                 return;
 492 
 493         newae(h, "-traditional");
 494         newae(h, "-traditional-cpp");
 495 }
 496 
 497 static void
 498 usage()
 499 {
 500         extern char *__progname;
 501         (void) fprintf(stderr,
 502             "usage: %s [-C] [--versions] --primary <compiler> "
 503             "[--shadow <compiler>]... -- cflags...\n",
 504             __progname);
 505         (void) fprintf(stderr, "compilers take the form: name,path,style\n"
 506             " - name: a unique name usable in flag specifiers\n"
 507             " - path: path to the compiler binary\n"
 508             " - style: the style of flags expected: either sun or gnu\n");
 509         exit(2);
 510 }
 511 
 512 static int
 513 xlate_xtb(struct aelist *h, const char *xarg)
 514 {
 515         int     i, j;
 516 
 517         for (i = 0; i < xtbl_size; i++) {
 518                 if (strcmp(xtbl[i].x_arg, xarg) == 0)
 519                         break;
 520         }
 521 
 522         /*
 523          * At the end of the table and so no matching "arg" entry
 524          * found and so this must be a bad -xarch= flag.
 525          */
 526         if (i == xtbl_size)
 527                 error(xarg);
 528 
 529         for (j = 0; j < TRANS_ENTRY; j++) {
 530                 if (xtbl[i].x_trans[j] != NULL)
 531                         newae(h, xtbl[i].x_trans[j]);
 532                 else
 533                         break;
 534         }
 535         return (xtbl[i].x_flags);
 536 
 537 }
 538 
 539 static void
 540 xlate(struct aelist *h, const char *xarg, const char **table)
 541 {
 542         while (*table != NULL && strcmp(xarg, *table) != 0) {
 543                 while (*table != NULL)
 544                         table++;
 545                 table++;
 546         }
 547 
 548         if (*table == NULL)
 549                 error(xarg);
 550 
 551         table++;
 552 
 553         while (*table != NULL) {
 554                 newae(h, *table);
 555                 table++;
 556         }
 557 }
 558 
 559 static void
 560 do_gcc(cw_ictx_t *ctx)
 561 {
 562         int c;
 563         int nolibc = 0;
 564         int in_output = 0, seen_o = 0, c_files = 0;
 565         cw_op_t op = CW_O_LINK;
 566         char *model = NULL;
 567         char *nameflag;
 568         int     mflag = 0;
 569 
 570         if (ctx->i_flags & CW_F_PROG) {
 571                 newae(ctx->i_ae, "--version");
 572                 return;
 573         }
 574 
 575         newae(ctx->i_ae, "-fident");
 576         newae(ctx->i_ae, "-finline");
 577         newae(ctx->i_ae, "-fno-inline-functions");
 578         newae(ctx->i_ae, "-fno-builtin");
 579         newae(ctx->i_ae, "-fno-asm");
 580         newae(ctx->i_ae, "-fdiagnostics-show-option");
 581         newae(ctx->i_ae, "-nodefaultlibs");
 582 
 583 #if defined(__sparc)
 584         /*
 585          * The SPARC ldd and std instructions require 8-byte alignment of
 586          * their address operand.  gcc correctly uses them only when the
 587          * ABI requires 8-byte alignment; unfortunately we have a number of
 588          * pieces of buggy code that doesn't conform to the ABI.  This
 589          * flag makes gcc work more like Studio with -xmemalign=4.
 590          */
 591         newae(ctx->i_ae, "-mno-integer-ldd-std");
 592 #endif
 593 
 594         /*
 595          * This is needed because 'u' is defined
 596          * under a conditional on 'sun'.  Should
 597          * probably just remove the conditional,
 598          * or make it be dependent on '__sun'.
 599          *
 600          * -Dunix is also missing in enhanced ANSI mode
 601          */
 602         newae(ctx->i_ae, "-D__sun");
 603 
 604         if (asprintf(&nameflag, "-_%s=", ctx->i_compiler->c_name) == -1)
 605                 nomem();
 606 
 607         /*
 608          * Walk the argument list, translating as we go ..
 609          */
 610         while (--ctx->i_oldargc > 0) {
 611                 char *arg = *++ctx->i_oldargv;
 612                 size_t arglen = strlen(arg);
 613 
 614                 if (*arg == '-') {
 615                         arglen--;
 616                 } else {
 617                         /*
 618                          * Discard inline files that gcc doesn't grok
 619                          */
 620                         if (!in_output && arglen > 3 &&
 621                             strcmp(arg + arglen - 3, ".il") == 0)
 622                                 continue;
 623 
 624                         if (!in_output && arglen > 2 &&
 625                             arg[arglen - 2] == '.' &&
 626                             (arg[arglen - 1] == 'S' || arg[arglen - 1] == 's' ||
 627                             arg[arglen - 1] == 'c' || arg[arglen - 1] == 'i'))
 628                                 c_files++;
 629 
 630                         /*
 631                          * Otherwise, filenames and partial arguments
 632                          * are passed through for gcc to chew on.  However,
 633                          * output is always discarded for the secondary
 634                          * compiler.
 635                          */
 636                         if ((ctx->i_flags & CW_F_SHADOW) && in_output)
 637                                 newae(ctx->i_ae, ctx->i_discard);
 638                         else
 639                                 newae(ctx->i_ae, arg);
 640                         in_output = 0;
 641                         continue;
 642                 }
 643 
 644                 if (ctx->i_flags & CW_F_CXX) {
 645                         if (strncmp(arg, "-_g++=", 6) == 0) {
 646                                 newae(ctx->i_ae, strchr(arg, '=') + 1);
 647                                 continue;
 648                         }
 649                         if (strncmp(arg, "-compat=", 8) == 0) {
 650                                 /* discard -compat=4 and -compat=5 */
 651                                 continue;
 652                         }
 653                         if (strcmp(arg, "-Qoption") == 0) {
 654                                 /* discard -Qoption and its two arguments */
 655                                 if (ctx->i_oldargc < 3)
 656                                         error(arg);
 657                                 ctx->i_oldargc -= 2;
 658                                 ctx->i_oldargv += 2;
 659                                 continue;
 660                         }
 661                         if (strcmp(arg, "-xwe") == 0) {
 662                                 /* turn warnings into errors */
 663                                 newae(ctx->i_ae, "-Werror");
 664                                 continue;
 665                         }
 666                         if (strcmp(arg, "-norunpath") == 0) {
 667                                 /* gcc has no corresponding option */
 668                                 continue;
 669                         }
 670                         if (strcmp(arg, "-nolib") == 0) {
 671                                 /* -nodefaultlibs is on by default */
 672                                 nolibc = 1;
 673                                 continue;
 674                         }
 675 #if defined(__sparc)
 676                         if (strcmp(arg, "-cg92") == 0) {
 677                                 mflag |= xlate_xtb(ctx->i_ae, "v8");
 678                                 xlate(ctx->i_ae, "super", xchip_tbl);
 679                                 continue;
 680                         }
 681 #endif  /* __sparc */
 682                 }
 683 
 684                 switch ((c = arg[1])) {
 685                 case '_':
 686                         if ((strncmp(arg, nameflag, strlen(nameflag)) == 0) ||
 687                             (strncmp(arg, "-_gcc=", 6) == 0) ||
 688                             (strncmp(arg, "-_gnu=", 6) == 0)) {
 689                                 newae(ctx->i_ae, strchr(arg, '=') + 1);
 690                         }
 691                         break;
 692                 case '#':
 693                         if (arglen == 1) {
 694                                 newae(ctx->i_ae, "-v");
 695                                 break;
 696                         }
 697                         error(arg);
 698                         break;
 699                 case 'f':
 700                         if ((strcmp(arg, "-fpic") == 0) ||
 701                             (strcmp(arg, "-fPIC") == 0)) {
 702                                 newae(ctx->i_ae, arg);
 703                                 break;
 704                         }
 705                         error(arg);
 706                         break;
 707                 case 'g':
 708                         newae(ctx->i_ae, "-gdwarf-2");
 709                         break;
 710                 case 'E':
 711                         if (arglen == 1) {
 712                                 newae(ctx->i_ae, "-xc");
 713                                 newae(ctx->i_ae, arg);
 714                                 op = CW_O_PREPROCESS;
 715                                 nolibc = 1;
 716                                 break;
 717                         }
 718                         error(arg);
 719                         break;
 720                 case 'c':
 721                 case 'S':
 722                         if (arglen == 1) {
 723                                 op = CW_O_COMPILE;
 724                                 nolibc = 1;
 725                         }
 726                         /* FALLTHROUGH */
 727                 case 'C':
 728                 case 'H':
 729                 case 'p':
 730                         if (arglen == 1) {
 731                                 newae(ctx->i_ae, arg);
 732                                 break;
 733                         }
 734                         error(arg);
 735                         break;
 736                 case 'A':
 737                 case 'h':
 738                 case 'I':
 739                 case 'i':
 740                 case 'L':
 741                 case 'l':
 742                 case 'R':
 743                 case 'U':
 744                 case 'u':
 745                 case 'w':
 746                         newae(ctx->i_ae, arg);
 747                         break;
 748                 case 'o':
 749                         seen_o = 1;
 750                         if (arglen == 1) {
 751                                 in_output = 1;
 752                                 newae(ctx->i_ae, arg);
 753                         } else if (ctx->i_flags & CW_F_SHADOW) {
 754                                 newae(ctx->i_ae, "-o");
 755                                 newae(ctx->i_ae, ctx->i_discard);
 756                         } else {
 757                                 newae(ctx->i_ae, arg);
 758                         }
 759                         break;
 760                 case 'D':
 761                         newae(ctx->i_ae, arg);
 762                         /*
 763                          * XXX  Clearly a hack ... do we need _KADB too?
 764                          */
 765                         if (strcmp(arg, "-D_KERNEL") == 0 ||
 766                             strcmp(arg, "-D_BOOT") == 0)
 767                                 newae(ctx->i_ae, "-ffreestanding");
 768                         break;
 769                 case 'd':
 770                         if (arglen == 2) {
 771                                 if (strcmp(arg, "-dy") == 0) {
 772                                         newae(ctx->i_ae, "-Wl,-dy");
 773                                         break;
 774                                 }
 775                                 if (strcmp(arg, "-dn") == 0) {
 776                                         newae(ctx->i_ae, "-Wl,-dn");
 777                                         break;
 778                                 }
 779                         }
 780                         if (strcmp(arg, "-dalign") == 0) {
 781                                 /*
 782                                  * -dalign forces alignment in some cases;
 783                                  * gcc does not need any flag to do this.
 784                                  */
 785                                 break;
 786                         }
 787                         error(arg);
 788                         break;
 789                 case 'e':
 790                         if (strcmp(arg,
 791                             "-erroff=E_EMPTY_TRANSLATION_UNIT") == 0) {
 792                                 /*
 793                                  * Accept but ignore this -- gcc doesn't
 794                                  * seem to complain about empty translation
 795                                  * units
 796                                  */
 797                                 break;
 798                         }
 799                         /* XX64 -- ignore all -erroff= options, for now */
 800                         if (strncmp(arg, "-erroff=", 8) == 0)
 801                                 break;
 802                         if (strcmp(arg, "-errtags=yes") == 0) {
 803                                 warnings(ctx->i_ae);
 804                                 break;
 805                         }
 806                         if (strcmp(arg, "-errwarn=%all") == 0) {
 807                                 newae(ctx->i_ae, "-Werror");
 808                                 break;
 809                         }
 810                         error(arg);
 811                         break;
 812                 case 'G':
 813                         newae(ctx->i_ae, "-shared");
 814                         nolibc = 1;
 815                         break;
 816                 case 'k':
 817                         if (strcmp(arg, "-keeptmp") == 0) {
 818                                 newae(ctx->i_ae, "-save-temps");
 819                                 break;
 820                         }
 821                         error(arg);
 822                         break;
 823                 case 'm':
 824                         if (strcmp(arg, "-mt") == 0) {
 825                                 newae(ctx->i_ae, "-D_REENTRANT");
 826                                 break;
 827                         }
 828                         if (strcmp(arg, "-m64") == 0) {
 829                                 newae(ctx->i_ae, "-m64");
 830 #if defined(__x86)
 831                                 newae(ctx->i_ae, "-mtune=opteron");
 832 #endif
 833                                 mflag |= M64;
 834                                 break;
 835                         }
 836                         if (strcmp(arg, "-m32") == 0) {
 837                                 newae(ctx->i_ae, "-m32");
 838                                 mflag |= M32;
 839                                 break;
 840                         }
 841                         error(arg);
 842                         break;
 843                 case 'B':       /* linker options */
 844                 case 'M':
 845                 case 'z':
 846                         {
 847                                 char *opt;
 848                                 size_t len;
 849                                 char *s;
 850 
 851                                 if (arglen == 1) {
 852                                         opt = *++ctx->i_oldargv;
 853                                         if (opt == NULL || *opt == '\0')
 854                                                 error(arg);
 855                                         ctx->i_oldargc--;
 856                                 } else {
 857                                         opt = arg + 2;
 858                                 }
 859                                 len = strlen(opt) + 7;
 860                                 if ((s = malloc(len)) == NULL)
 861                                         nomem();
 862                                 (void) snprintf(s, len, "-Wl,-%c%s", c, opt);
 863                                 newae(ctx->i_ae, s);
 864                                 free(s);
 865                         }
 866                         break;
 867                 case 'O':
 868                         if (arglen == 1) {
 869                                 newae(ctx->i_ae, "-O");
 870                                 break;
 871                         }
 872                         error(arg);
 873                         break;
 874                 case 'P':
 875                         /*
 876                          * We could do '-E -o filename.i', but that's hard,
 877                          * and we don't need it for the case that's triggering
 878                          * this addition.  We'll require the user to specify
 879                          * -o in the Makefile.  If they don't they'll find out
 880                          * in a hurry.
 881                          */
 882                         newae(ctx->i_ae, "-E");
 883                         op = CW_O_PREPROCESS;
 884                         nolibc = 1;
 885                         break;
 886                 case 's':
 887                         if (arglen == 1) {
 888                                 newae(ctx->i_ae, "-Wl,-s");
 889                                 break;
 890                         }
 891                         error(arg);
 892                         break;
 893                 case 't':
 894                         if (arglen == 1) {
 895                                 newae(ctx->i_ae, "-Wl,-t");
 896                                 break;
 897                         }
 898                         error(arg);
 899                         break;
 900                 case 'V':
 901                         if (arglen == 1) {
 902                                 ctx->i_flags &= ~CW_F_ECHO;
 903                                 newae(ctx->i_ae, "--version");
 904                                 break;
 905                         }
 906                         error(arg);
 907                         break;
 908                 case 'v':
 909                         if (arglen == 1) {
 910                                 warnings(ctx->i_ae);
 911                                 break;
 912                         }
 913                         error(arg);
 914                         break;
 915                 case 'W':
 916                         if (strncmp(arg, "-Wp,-xc99", 9) == 0) {
 917                                 /*
 918                                  * gcc's preprocessor will accept c99
 919                                  * regardless, so accept and ignore.
 920                                  */
 921                                 break;
 922                         }
 923                         if (strncmp(arg, "-Wa,", 4) == 0 ||
 924                             strncmp(arg, "-Wp,", 4) == 0 ||
 925                             strncmp(arg, "-Wl,", 4) == 0) {
 926                                 newae(ctx->i_ae, arg);
 927                                 break;
 928                         }
 929                         if (strcmp(arg, "-W0,-noglobal") == 0 ||
 930                             strcmp(arg, "-W0,-xglobalstatic") == 0) {
 931                                 /*
 932                                  * gcc doesn't prefix local symbols
 933                                  * in debug mode, so this is not needed.
 934                                  */
 935                                 break;
 936                         }
 937                         if (strcmp(arg, "-W0,-Lt") == 0) {
 938                                 /*
 939                                  * Generate tests at the top of loops.
 940                                  * There is no direct gcc equivalent, ignore.
 941                                  */
 942                                 break;
 943                         }
 944                         if (strcmp(arg, "-W0,-xdbggen=no%usedonly") == 0) {
 945                                 newae(ctx->i_ae,
 946                                     "-fno-eliminate-unused-debug-symbols");
 947                                 newae(ctx->i_ae,
 948                                     "-fno-eliminate-unused-debug-types");
 949                                 break;
 950                         }
 951                         if (strcmp(arg, "-W2,-xwrap_int") == 0) {
 952                                 /*
 953                                  * Use the legacy behaviour (pre-SS11)
 954                                  * for integer wrapping.
 955                                  * gcc does not need this.
 956                                  */
 957                                 break;
 958                         }
 959                         if (strcmp(arg, "-Wd,-xsafe=unboundsym") == 0) {
 960                                 /*
 961                                  * Prevents optimizing away checks for
 962                                  * unbound weak symbol addresses.  gcc does
 963                                  * not do this, so it's not needed.
 964                                  */
 965                                 break;
 966                         }
 967                         if (strncmp(arg, "-Wc,-xcode=", 11) == 0) {
 968                                 xlate(ctx->i_ae, arg + 11, xcode_tbl);
 969                                 break;
 970                         }
 971                         if (strncmp(arg, "-Wc,-Qiselect", 13) == 0) {
 972                                 /*
 973                                  * Prevents insertion of register symbols.
 974                                  * gcc doesn't do this, so ignore it.
 975                                  */
 976                                 break;
 977                         }
 978                         if (strcmp(arg, "-Wc,-Qassembler-ounrefsym=0") == 0) {
 979                                 /*
 980                                  * Prevents optimizing away of static variables.
 981                                  * gcc does not do this, so it's not needed.
 982                                  */
 983                                 break;
 984                         }
 985 #if defined(__x86)
 986                         if (strcmp(arg, "-Wu,-save_args") == 0) {
 987                                 newae(ctx->i_ae, "-msave-args");
 988                                 break;
 989                         }
 990 #endif  /* __x86 */
 991                         error(arg);
 992                         break;
 993                 case 'X':
 994                         if (strcmp(arg, "-Xa") == 0 ||
 995                             strcmp(arg, "-Xt") == 0) {
 996                                 break;
 997                         }
 998                         if (strcmp(arg, "-Xs") == 0) {
 999                                 Xsmode(ctx->i_ae);
1000                                 break;
1001                         }
1002                         error(arg);
1003                         break;
1004                 case 'x':
1005                         if (arglen == 1)
1006                                 error(arg);
1007                         switch (arg[2]) {
1008                         case 'a':
1009                                 if (strncmp(arg, "-xarch=", 7) == 0) {
1010                                         mflag |= xlate_xtb(ctx->i_ae, arg + 7);
1011                                         break;
1012                                 }
1013                                 error(arg);
1014                                 break;
1015                         case 'b':
1016                                 if (strncmp(arg, "-xbuiltin=", 10) == 0) {
1017                                         if (strcmp(arg + 10, "%all"))
1018                                                 newae(ctx->i_ae, "-fbuiltin");
1019                                         break;
1020                                 }
1021                                 error(arg);
1022                                 break;
1023                         case 'C':
1024                                 /* Accept C++ style comments -- ignore */
1025                                 if (strcmp(arg, "-xCC") == 0)
1026                                         break;
1027                                 error(arg);
1028                                 break;
1029                         case 'c':
1030                                 if (strncmp(arg, "-xc99=%all", 10) == 0) {
1031                                         newae(ctx->i_ae, "-std=gnu99");
1032                                         break;
1033                                 }
1034                                 if (strncmp(arg, "-xc99=%none", 11) == 0) {
1035                                         newae(ctx->i_ae, "-std=gnu89");
1036                                         break;
1037                                 }
1038                                 if (strncmp(arg, "-xchip=", 7) == 0) {
1039                                         xlate(ctx->i_ae, arg + 7, xchip_tbl);
1040                                         break;
1041                                 }
1042                                 if (strncmp(arg, "-xcode=", 7) == 0) {
1043                                         xlate(ctx->i_ae, arg + 7, xcode_tbl);
1044                                         break;
1045                                 }
1046                                 if (strncmp(arg, "-xcrossfile", 11) == 0)
1047                                         break;
1048                                 error(arg);
1049                                 break;
1050                         case 'd':
1051                                 if (strncmp(arg, "-xdebugformat=", 14) == 0)
1052                                         break;
1053                                 error(arg);
1054                                 break;
1055                         case 'F':
1056                                 /*
1057                                  * Compile for mapfile reordering, or unused
1058                                  * section elimination, syntax can be -xF or
1059                                  * more complex, like -xF=%all -- ignore.
1060                                  */
1061                                 if (strncmp(arg, "-xF", 3) == 0)
1062                                         break;
1063                                 error(arg);
1064                                 break;
1065                         case 'i':
1066                                 if (strncmp(arg, "-xinline", 8) == 0)
1067                                         /* No inlining; ignore */
1068                                         break;
1069                                 if (strcmp(arg, "-xildon") == 0 ||
1070                                     strcmp(arg, "-xildoff") == 0)
1071                                         /* No incremental linking; ignore */
1072                                         break;
1073                                 error(arg);
1074                                 break;
1075 #if defined(__x86)
1076                         case 'm':
1077                                 if (strcmp(arg, "-xmodel=kernel") == 0) {
1078                                         newae(ctx->i_ae, "-ffreestanding");
1079                                         newae(ctx->i_ae, "-mno-red-zone");
1080                                         model = "-mcmodel=kernel";
1081                                         nolibc = 1;
1082                                         break;
1083                                 }
1084                                 error(arg);
1085                                 break;
1086 #endif  /* __x86 */
1087                         case 'O':
1088                                 if (strncmp(arg, "-xO", 3) == 0) {
1089                                         size_t len = strlen(arg);
1090                                         char *s = NULL;
1091                                         int c = *(arg + 3);
1092                                         int level;
1093 
1094                                         if (len != 4 || !isdigit(c))
1095                                                 error(arg);
1096 
1097                                         level = atoi(arg + 3);
1098                                         if (level > 5)
1099                                                 error(arg);
1100                                         if (level >= 2) {
1101                                                 /*
1102                                                  * For gcc-3.4.x at -O2 we
1103                                                  * need to disable optimizations
1104                                                  * that break ON.
1105                                                  */
1106                                                 optim_disable(ctx->i_ae, level);
1107                                                 /*
1108                                                  * limit -xO3 to -O2 as well.
1109                                                  */
1110                                                 level = 2;
1111                                         }
1112                                         if (asprintf(&s, "-O%d", level) == -1)
1113                                                 nomem();
1114                                         newae(ctx->i_ae, s);
1115                                         free(s);
1116                                         break;
1117                                 }
1118                                 error(arg);
1119                                 break;
1120                         case 'r':
1121                                 if (strncmp(arg, "-xregs=", 7) == 0) {
1122                                         xlate(ctx->i_ae, arg + 7, xregs_tbl);
1123                                         break;
1124                                 }
1125                                 error(arg);
1126                                 break;
1127                         case 's':
1128                                 if (strcmp(arg, "-xs") == 0 ||
1129                                     strcmp(arg, "-xspace") == 0 ||
1130                                     strcmp(arg, "-xstrconst") == 0)
1131                                         break;
1132                                 error(arg);
1133                                 break;
1134                         case 't':
1135                                 if (strncmp(arg, "-xtarget=", 9) == 0) {
1136                                         xlate(ctx->i_ae, arg + 9, xtarget_tbl);
1137                                         break;
1138                                 }
1139                                 error(arg);
1140                                 break;
1141                         case 'e':
1142                         case 'h':
1143                         case 'l':
1144                         default:
1145                                 error(arg);
1146                                 break;
1147                         }
1148                         break;
1149                 case 'Y':
1150                         if (arglen == 1) {
1151                                 if ((arg = *++ctx->i_oldargv) == NULL ||
1152                                     *arg == '\0')
1153                                         error("-Y");
1154                                 ctx->i_oldargc--;
1155                                 arglen = strlen(arg + 1);
1156                         } else {
1157                                 arg += 2;
1158                         }
1159                         /* Just ignore -YS,... for now */
1160                         if (strncmp(arg, "S,", 2) == 0)
1161                                 break;
1162                         if (strncmp(arg, "l,", 2) == 0) {
1163                                 char *s = strdup(arg);
1164                                 s[0] = '-';
1165                                 s[1] = 'B';
1166                                 newae(ctx->i_ae, s);
1167                                 free(s);
1168                                 break;
1169                         }
1170                         if (strncmp(arg, "I,", 2) == 0) {
1171                                 char *s = strdup(arg);
1172                                 s[0] = '-';
1173                                 s[1] = 'I';
1174                                 newae(ctx->i_ae, "-nostdinc");
1175                                 newae(ctx->i_ae, s);
1176                                 free(s);
1177                                 break;
1178                         }
1179                         error(arg);
1180                         break;
1181                 case 'Q':
1182                         /*
1183                          * We could map -Qy into -Wl,-Qy etc.
1184                          */
1185                 default:
1186                         error(arg);
1187                         break;
1188                 }
1189         }
1190 
1191         free(nameflag);
1192 
1193         if (c_files > 1 && (ctx->i_flags & CW_F_SHADOW) &&
1194             op != CW_O_PREPROCESS) {
1195                 errx(2, "multiple source files are "
1196                     "allowed only with -E or -P");
1197         }
1198 
1199         /*
1200          * Make sure that we do not have any unintended interactions between
1201          * the xarch options passed in and the version of the Studio compiler
1202          * used.
1203          */
1204         if ((mflag & (SS11|SS12)) == (SS11|SS12)) {
1205                 errx(2,
1206                     "Conflicting \"-xarch=\" flags (both Studio 11 and 12)\n");
1207         }
1208 
1209         switch (mflag) {
1210         case 0:
1211                 /* FALLTHROUGH */
1212         case M32:
1213 #if defined(__sparc)
1214                 /*
1215                  * Only -m32 is defined and so put in the missing xarch
1216                  * translation.
1217                  */
1218                 newae(ctx->i_ae, "-mcpu=v8");
1219                 newae(ctx->i_ae, "-mno-v8plus");
1220 #endif
1221                 break;
1222         case M64:
1223 #if defined(__sparc)
1224                 /*
1225                  * Only -m64 is defined and so put in the missing xarch
1226                  * translation.
1227                  */
1228                 newae(ctx->i_ae, "-mcpu=v9");
1229 #endif
1230                 break;
1231         case SS12:
1232 #if defined(__sparc)
1233                 /* no -m32/-m64 flag used - this is an error for sparc builds */
1234                 (void) fprintf(stderr, "No -m32/-m64 flag defined\n");
1235                 exit(2);
1236 #endif
1237                 break;
1238         case SS11:
1239                 /* FALLTHROUGH */
1240         case (SS11|M32):
1241         case (SS11|M64):
1242                 break;
1243         case (SS12|M32):
1244 #if defined(__sparc)
1245                 /*
1246                  * Need to add in further 32 bit options because with SS12
1247                  * the xarch=sparcvis option can be applied to 32 or 64
1248                  * bit, and so the translatation table (xtbl) cannot handle
1249                  * that.
1250                  */
1251                 newae(ctx->i_ae, "-mv8plus");
1252 #endif
1253                 break;
1254         case (SS12|M64):
1255                 break;
1256         default:
1257                 (void) fprintf(stderr,
1258                     "Incompatible -xarch= and/or -m32/-m64 options used.\n");
1259                 exit(2);
1260         }
1261 
1262         if ((op == CW_O_LINK || op == CW_O_PREPROCESS) &&
1263             (ctx->i_flags & CW_F_SHADOW))
1264                 exit(0);
1265 
1266         if (model != NULL)
1267                 newae(ctx->i_ae, model);
1268         if (!nolibc)
1269                 newae(ctx->i_ae, "-lc");
1270         if (!seen_o && (ctx->i_flags & CW_F_SHADOW)) {
1271                 newae(ctx->i_ae, "-o");
1272                 newae(ctx->i_ae, ctx->i_discard);
1273         }
1274 }
1275 
1276 static void
1277 do_smatch(cw_ictx_t *ctx)
1278 {
1279         if (ctx->i_flags & CW_F_PROG) {
1280                 newae(ctx->i_ae, "--version");
1281                 return;
1282         }
1283 
1284         /*
1285          * Some sources shouldn't run smatch at all.
1286          */
1287         for (int i = 0; i < ctx->i_oldargc; i++) {
1288                 char *arg = ctx->i_oldargv[i];
1289 
1290                 if (strcmp(arg, "-_smatch=off") == 0) {
1291                         ctx->i_flags &= ~ (CW_F_EXEC | CW_F_ECHO);
1292                         return;
1293                 }
1294         }
1295 
1296         /*
1297          * smatch can handle gcc's options.
1298          */
1299         do_gcc(ctx);
1300 }
1301 
1302 static void
1303 do_cc(cw_ictx_t *ctx)
1304 {
1305         int in_output = 0, seen_o = 0;
1306         cw_op_t op = CW_O_LINK;
1307         char *nameflag;
1308 
1309         if (ctx->i_flags & CW_F_PROG) {
1310                 newae(ctx->i_ae, "-V");
1311                 return;
1312         }
1313 
1314         if (asprintf(&nameflag, "-_%s=", ctx->i_compiler->c_name) == -1)
1315                 nomem();
1316 
1317         while (--ctx->i_oldargc > 0) {
1318                 char *arg = *++ctx->i_oldargv;
1319 
1320                 if (strncmp(arg, "-_CC=", 5) == 0) {
1321                         newae(ctx->i_ae, strchr(arg, '=') + 1);
1322                         continue;
1323                 }
1324 
1325                 if (*arg != '-') {
1326                         if (in_output == 0 || !(ctx->i_flags & CW_F_SHADOW)) {
1327                                 newae(ctx->i_ae, arg);
1328                         } else {
1329                                 in_output = 0;
1330                                 newae(ctx->i_ae, ctx->i_discard);
1331                         }
1332                         continue;
1333                 }
1334                 switch (*(arg + 1)) {
1335                 case '_':
1336                         if ((strncmp(arg, nameflag, strlen(nameflag)) == 0) ||
1337                             (strncmp(arg, "-_cc=", 5) == 0) ||
1338                             (strncmp(arg, "-_sun=", 6) == 0)) {
1339                                 newae(ctx->i_ae, strchr(arg, '=') + 1);
1340                         }
1341                         break;
1342 
1343                 case 'V':
1344                         ctx->i_flags &= ~CW_F_ECHO;
1345                         newae(ctx->i_ae, arg);
1346                         break;
1347                 case 'o':
1348                         seen_o = 1;
1349                         if (strlen(arg) == 2) {
1350                                 in_output = 1;
1351                                 newae(ctx->i_ae, arg);
1352                         } else if (ctx->i_flags & CW_F_SHADOW) {
1353                                 newae(ctx->i_ae, "-o");
1354                                 newae(ctx->i_ae, ctx->i_discard);
1355                         } else {
1356                                 newae(ctx->i_ae, arg);
1357                         }
1358                         break;
1359                 case 'c':
1360                 case 'S':
1361                         if (strlen(arg) == 2)
1362                                 op = CW_O_COMPILE;
1363                         newae(ctx->i_ae, arg);
1364                         break;
1365                 case 'E':
1366                 case 'P':
1367                         if (strlen(arg) == 2)
1368                                 op = CW_O_PREPROCESS;
1369                 /*FALLTHROUGH*/
1370                 default:
1371                         newae(ctx->i_ae, arg);
1372                 }
1373         }
1374 
1375         free(nameflag);
1376 
1377         if ((op == CW_O_LINK || op == CW_O_PREPROCESS) &&
1378             (ctx->i_flags & CW_F_SHADOW))
1379                 exit(0);
1380 
1381         if (!seen_o && (ctx->i_flags & CW_F_SHADOW)) {
1382                 newae(ctx->i_ae, "-o");
1383                 newae(ctx->i_ae, ctx->i_discard);
1384         }
1385 }
1386 
1387 static void
1388 prepctx(cw_ictx_t *ctx)
1389 {
1390         newae(ctx->i_ae, ctx->i_compiler->c_path);
1391 
1392         if (ctx->i_flags & CW_F_PROG) {
1393                 (void) printf("%s: %s\n", (ctx->i_flags & CW_F_SHADOW) ?
1394                     "shadow" : "primary", ctx->i_compiler->c_path);
1395                 (void) fflush(stdout);
1396         }
1397 
1398         if (!(ctx->i_flags & CW_F_XLATE))
1399                 return;
1400 
1401         switch (ctx->i_compiler->c_style) {
1402         case SUN:
1403                 do_cc(ctx);
1404                 break;
1405         case GNU:
1406                 do_gcc(ctx);
1407                 break;
1408         case SMATCH:
1409                 do_smatch(ctx);
1410                 break;
1411         }
1412 }
1413 
1414 static int
1415 invoke(cw_ictx_t *ctx)
1416 {
1417         char **newargv;
1418         int ac;
1419         struct ae *a;
1420 
1421         if ((newargv = calloc(sizeof (*newargv), ctx->i_ae->ael_argc + 1)) ==
1422             NULL)
1423                 nomem();
1424 
1425         if (ctx->i_flags & CW_F_ECHO)
1426                 (void) fprintf(stderr, "+ ");
1427 
1428         for (ac = 0, a = ctx->i_ae->ael_head; a; a = a->ae_next, ac++) {
1429                 newargv[ac] = a->ae_arg;
1430                 if (ctx->i_flags & CW_F_ECHO)
1431                         (void) fprintf(stderr, "%s ", a->ae_arg);
1432                 if (a == ctx->i_ae->ael_tail)
1433                         break;
1434         }
1435 
1436         if (ctx->i_flags & CW_F_ECHO) {
1437                 (void) fprintf(stderr, "\n");
1438                 (void) fflush(stderr);
1439         }
1440 
1441         if (!(ctx->i_flags & CW_F_EXEC))
1442                 return (0);
1443 
1444         /*
1445          * We must fix up the environment here so that the dependency files are
1446          * not trampled by the shadow compiler. Also take care of GCC
1447          * environment variables that will throw off gcc. This assumes a primary
1448          * gcc.
1449          */
1450         if ((ctx->i_flags & CW_F_SHADOW) &&
1451             (unsetenv("SUNPRO_DEPENDENCIES") != 0 ||
1452             unsetenv("DEPENDENCIES_OUTPUT") != 0 ||
1453             unsetenv("GCC_ROOT") != 0)) {
1454                 (void) fprintf(stderr, "error: environment setup failed: %s\n",
1455                     strerror(errno));
1456                 return (-1);
1457         }
1458 
1459         (void) execv(newargv[0], newargv);
1460         warn("couldn't run %s", newargv[0]);
1461 
1462         return (-1);
1463 }
1464 
1465 static int
1466 reap(cw_ictx_t *ctx)
1467 {
1468         int status, ret = 0;
1469         char buf[1024];
1470         struct stat s;
1471 
1472         /*
1473          * Only wait for one specific child.
1474          */
1475         if (ctx->i_pid <= 0)
1476                 return (-1);
1477 
1478         do {
1479                 if (waitpid(ctx->i_pid, &status, 0) < 0) {
1480                         warn("cannot reap child");
1481                         return (-1);
1482                 }
1483                 if (status != 0) {
1484                         if (WIFSIGNALED(status)) {
1485                                 ret = -WTERMSIG(status);
1486                                 break;
1487                         } else if (WIFEXITED(status)) {
1488                                 ret = WEXITSTATUS(status);
1489                                 break;
1490                         }
1491                 }
1492         } while (!WIFEXITED(status) && !WIFSIGNALED(status));
1493 
1494         (void) unlink(ctx->i_discard);
1495 
1496         if (stat(ctx->i_stderr, &s) < 0) {
1497                 warn("stat failed on child cleanup");
1498                 return (-1);
1499         }
1500         if (s.st_size != 0) {
1501                 FILE *f;
1502 
1503                 if ((f = fopen(ctx->i_stderr, "r")) != NULL) {
1504                         while (fgets(buf, sizeof (buf), f))
1505                                 (void) fprintf(stderr, "%s", buf);
1506                         (void) fflush(stderr);
1507                         (void) fclose(f);
1508                 }
1509         }
1510         (void) unlink(ctx->i_stderr);
1511         free(ctx->i_stderr);
1512 
1513         /*
1514          * cc returns an error code when given -V; we want that to succeed.
1515          */
1516         if (ctx->i_flags & CW_F_PROG)
1517                 return (0);
1518 
1519         return (ret);
1520 }
1521 
1522 static int
1523 exec_ctx(cw_ictx_t *ctx, int block)
1524 {
1525         char *file;
1526 
1527         /*
1528          * To avoid offending cc's sensibilities, the name of its output
1529          * file must end in '.o'.
1530          */
1531         if ((file = tempnam(NULL, ".cw")) == NULL) {
1532                 nomem();
1533                 return (-1);
1534         }
1535         (void) strlcpy(ctx->i_discard, file, MAXPATHLEN);
1536         (void) strlcat(ctx->i_discard, ".o", MAXPATHLEN);
1537         free(file);
1538 
1539         if ((ctx->i_stderr = tempnam(NULL, ".cw")) == NULL) {
1540                 nomem();
1541                 return (-1);
1542         }
1543 
1544         if ((ctx->i_pid = fork()) == 0) {
1545                 int fd;
1546 
1547                 (void) fclose(stderr);
1548                 if ((fd = open(ctx->i_stderr, O_WRONLY | O_CREAT | O_EXCL,
1549                     0666)) < 0) {
1550                         err(1, "open failed for standard error");
1551                 }
1552                 if (dup2(fd, 2) < 0) {
1553                         err(1, "dup2 failed for standard error");
1554                 }
1555                 if (fd != 2)
1556                         (void) close(fd);
1557                 if (freopen("/dev/fd/2", "w", stderr) == NULL) {
1558                         err(1, "freopen failed for /dev/fd/2");
1559                 }
1560 
1561                 prepctx(ctx);
1562                 exit(invoke(ctx));
1563         }
1564 
1565         if (ctx->i_pid < 0) {
1566                 err(1, "fork failed");
1567         }
1568 
1569         if (block)
1570                 return (reap(ctx));
1571 
1572         return (0);
1573 }
1574 
1575 static void
1576 parse_compiler(const char *spec, cw_compiler_t *compiler)
1577 {
1578         char *tspec, *token;
1579 
1580         if ((tspec = strdup(spec)) == NULL)
1581                 nomem();
1582 
1583         if ((token = strsep(&tspec, ",")) == NULL)
1584                 errx(1, "Compiler is missing a name: %s", spec);
1585         compiler->c_name = token;
1586 
1587         if ((token = strsep(&tspec, ",")) == NULL)
1588                 errx(1, "Compiler is missing a path: %s", spec);
1589         compiler->c_path = token;
1590 
1591         if ((token = strsep(&tspec, ",")) == NULL)
1592                 errx(1, "Compiler is missing a style: %s", spec);
1593 
1594         if ((strcasecmp(token, "gnu") == 0) ||
1595             (strcasecmp(token, "gcc") == 0)) {
1596                 compiler->c_style = GNU;
1597         } else if ((strcasecmp(token, "sun") == 0) ||
1598             (strcasecmp(token, "cc") == 0)) {
1599                 compiler->c_style = SUN;
1600         } else if ((strcasecmp(token, "smatch") == 0)) {
1601                 compiler->c_style = SMATCH;
1602         } else {
1603                 errx(1, "unknown compiler style: %s", token);
1604         }
1605 
1606         if (tspec != NULL)
1607                 errx(1, "Excess tokens in compiler: %s", spec);
1608 }
1609 
1610 int
1611 main(int argc, char **argv)
1612 {
1613         int ch;
1614         cw_compiler_t primary = { NULL, NULL, 0 };
1615         cw_compiler_t shadows[10];
1616         int nshadows = 0;
1617         int ret = 0;
1618         boolean_t do_serial = B_FALSE;
1619         boolean_t do_exec = B_FALSE;
1620         boolean_t vflg = B_FALSE;
1621         boolean_t Cflg = B_FALSE;
1622         boolean_t cflg = B_FALSE;
1623         boolean_t nflg = B_FALSE;
1624 
1625         cw_ictx_t *main_ctx;
1626 
1627         static struct option longopts[] = {
1628                 { "compiler", no_argument, NULL, 'c' },
1629                 { "noecho", no_argument, NULL, 'n' },
1630                 { "primary", required_argument, NULL, 'p' },
1631                 { "shadow", required_argument, NULL, 's' },
1632                 { "versions", no_argument, NULL, 'v' },
1633                 { NULL, 0, NULL, 0 },
1634         };
1635 
1636 
1637         if ((main_ctx = newictx()) == NULL)
1638                 nomem();
1639 
1640         while ((ch = getopt_long(argc, argv, "C", longopts, NULL)) != -1) {
1641                 switch (ch) {
1642                 case 'c':
1643                         cflg = B_TRUE;
1644                         break;
1645                 case 'C':
1646                         Cflg = B_TRUE;
1647                         break;
1648                 case 'n':
1649                         nflg = B_TRUE;
1650                         break;
1651                 case 'p':
1652                         if (primary.c_path != NULL) {
1653                                 warnx("Only one primary compiler may "
1654                                     "be specified");
1655                                 usage();
1656                         }
1657 
1658                         parse_compiler(optarg, &primary);
1659                         break;
1660                 case 's':
1661                         if (nshadows >= 10)
1662                                 errx(1, "May only use 10 shadows at "
1663                                     "the moment");
1664                         parse_compiler(optarg, &shadows[nshadows]);
1665                         nshadows++;
1666                         break;
1667                 case 'v':
1668                         vflg = B_TRUE;
1669                         break;
1670                 default:
1671                         (void) fprintf(stderr, "Did you forget '--'?\n");
1672                         usage();
1673                 }
1674         }
1675 
1676         if (primary.c_path == NULL) {
1677                 warnx("A primary compiler must be specified");
1678                 usage();
1679         }
1680 
1681         do_serial = (getenv("CW_SHADOW_SERIAL") == NULL) ? B_FALSE : B_TRUE;
1682         do_exec = (getenv("CW_NO_EXEC") == NULL) ? B_TRUE : B_FALSE;
1683 
1684         /* Leave room for argv[0] */
1685         argc -= (optind - 1);
1686         argv += (optind - 1);
1687 
1688         main_ctx->i_oldargc = argc;
1689         main_ctx->i_oldargv = argv;
1690         main_ctx->i_flags = CW_F_XLATE;
1691         if (nflg == 0)
1692                 main_ctx->i_flags |= CW_F_ECHO;
1693         if (do_exec)
1694                 main_ctx->i_flags |= CW_F_EXEC;
1695         if (Cflg)
1696                 main_ctx->i_flags |= CW_F_CXX;
1697         main_ctx->i_compiler = &primary;
1698 
1699         if (cflg) {
1700                 (void) fputs(primary.c_path, stdout);
1701         }
1702 
1703         if (vflg) {
1704                 (void) printf("cw version %s\n", CW_VERSION);
1705                 (void) fflush(stdout);
1706                 main_ctx->i_flags &= ~CW_F_ECHO;
1707                 main_ctx->i_flags |= CW_F_PROG | CW_F_EXEC;
1708                 do_serial = 1;
1709         }
1710 
1711         ret |= exec_ctx(main_ctx, do_serial);
1712 
1713         for (int i = 0; i < nshadows; i++) {
1714                 int r;
1715                 cw_ictx_t *shadow_ctx;
1716 
1717                 if ((shadow_ctx = newictx()) == NULL)
1718                         nomem();
1719 
1720                 memcpy(shadow_ctx, main_ctx, sizeof (cw_ictx_t));
1721 
1722                 shadow_ctx->i_flags |= CW_F_SHADOW;
1723                 shadow_ctx->i_compiler = &shadows[i];
1724 
1725                 r = exec_ctx(shadow_ctx, do_serial);
1726                 if (r == 0) {
1727                         shadow_ctx->i_next = main_ctx->i_next;
1728                         main_ctx->i_next = shadow_ctx;
1729                 }
1730                 ret |= r;
1731         }
1732 
1733         if (!do_serial) {
1734                 cw_ictx_t *next = main_ctx;
1735                 while (next != NULL) {
1736                         cw_ictx_t *toreap = next;
1737                         next = next->i_next;
1738                         ret |= reap(toreap);
1739                 }
1740         }
1741 
1742         return (ret);
1743 }