gcc/config.sub

   1 #!/bin/sh
   2 # Configuration validation subroutine script, version 1.1.
   3 #   Copyright (C) 1991, 1992, 1993, 1994 Free Software Foundation, Inc.
   4 # This file is (in principle) common to ALL GNU software.
   5 # The presence of a machine in this file suggests that SOME GNU software
   6 # can handle that machine.  It does not imply ALL GNU software can.
   7
   8 #This file is free software; you can redistribute it and/or modify
   9 #it under the terms of the GNU General Public License as published by
  10 #the Free Software Foundation; either version 2 of the License, or
  11 #(at your option) any later version.
  12
  13 #This program is distributed in the hope that it will be useful,
  14 #but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 #MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 #GNU General Public License for more details.
  17
  18 #You should have received a copy of the GNU General Public License
  19 #along with this program; if not, write to the Free Software
  20 #Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  21
  22
  23 # Configuration subroutine to validate and canonicalize a configuration type.
  24 # Supply the specified configuration type as an argument.
  25 # If it is invalid, we print an error message on stderr and exit with code 1.
  26 # Otherwise, we print the canonical config type on stdout and succeed.
  27
  28 # This file is supposed to be the same for all GNU packages
  29 # and recognize all the CPU types, system types and aliases
  30 # that are meaningful with *any* GNU software.
  31 # Each package is responsible for reporting which valid configurations
  32 # it does not support.  The user should be able to distinguish
  33 # a failure to support a valid configuration from a meaningless
  34 # configuration.
  35
  36 # The goal of this file is to map all the various variations of a given
  37 # machine specification into a single specification in the form:
  38 #       CPU_TYPE-MANUFACTURER-OPERATING_SYSTEM
  39 # It is wrong to echo any other type of specification.
  40
  41 # First pass through any local machine types.
  42 case $1 in
  43         *local*)
  44                 echo $1
  45                 exit 0
  46                 ;;
  47         *)
  48         ;;
  49 esac
  50
  51 # Separate what the user gave into CPU-COMPANY and OS (if any).
  52 basic_machine=`echo $1 | sed 's/-[^-]*$//'`
  53 if [ $basic_machine != $1 ]
  54 then os=`echo $1 | sed 's/.*-/-/'`
  55 else os=; fi
  56
  57 ### Let's recognize common machines as not being operating systems so
  58 ### that things like config.sub decstation-3100 work.  We also
  59 ### recognize some manufacturers as not being operating systems, so we
  60 ### can provide default operating systems below.
  61 case $os in
  62         -sun*os*)
  63                 # Prevent following clause from handling this invalid input.
  64                 ;;
  65         -dec* | -mips* | -sequent* | -encore* | -pc532* | -sgi* | -sony* | \
  66         -att* | -7300* | -3300* | -delta* | -motorola* | -sun[234]* | \
  67         -unicom* | -ibm* | -next* | -hp | -isi* | -apollo | -altos* | \
  68         -convergent* | -ncr* | -news | -32* | -3600* | -3100* | -hitachi* |\
  69         -c[123]* | -convex* | -sun | -crds | -omron* | -dg | -ultra | -tti* | \
  70         -harris | -dolphin | -highlevel | -gould | -cbm | -ns | -masscomp )
  71                 os=
  72                 basic_machine=$1
  73                 ;;
  74         -hiux*)
  75                 os=-hiuxwe2
  76                 ;;
  77         -sco4)
  78                 os=-sco3.2v4
  79                 basic_machine=`echo $1 | sed -e 's/86-.*/86-unknown/'`
  80                 ;;
  81         -sco3.2.[4-9]*)
  82                 os=`echo $os | sed -e 's/sco3.2./sco3.2v/'`
  83                 basic_machine=`echo $1 | sed -e 's/86-.*/86-unknown/'`
  84                 ;;
  85         -sco3.2v[4-9]*)
  86                 # Don't forget version if it is 3.2v4 or newer.
  87                 basic_machine=`echo $1 | sed -e 's/86-.*/86-unknown/'`
  88                 ;;
  89         -sco*)
  90                 os=-sco3.2v2
  91                 basic_machine=`echo $1 | sed -e 's/86-.*/86-unknown/'`
  92                 ;;
  93         -isc)
  94                 os=-isc2.2
  95                 basic_machine=`echo $1 | sed -e 's/86-.*/86-unknown/'`
  96                 ;;
  97         -clix*)
  98                 basic_machine=clipper-intergraph
  99                 ;;
 100         -isc*)
 101                 basic_machine=`echo $1 | sed -e 's/86-.*/86-unknown/'`
 102                 ;;
 103         -lynx)
 104                 os=-lynxos
 105                 ;;
 106 esac
 107
 108 # Decode aliases for certain CPU-COMPANY combinations.
 109 case $basic_machine in
 110         # Recognize the basic CPU types without company name.
 111         # Some are omitted here because they have special meanings below.
 112         tahoe | i[34]86 | i860 | m68k | m68000 | m88k | ns32k | arm | pyramid \
 113                 | tron | a29k | 580 | i960 | h8300 | hppa1.0 | hppa1.1 \
 114                 | alpha | we32k | ns16k | clipper | sparclite | i370 | sh \
 115                 | powerpc)
 116                 basic_machine=$basic_machine-unknown
 117                 ;;
 118         # Object if more than one company name word.
 119         *-*-*)
 120                 echo Invalid configuration \`$1\': machine \`$basic_machine\' not recognized 1>&2
 121                 exit 1
 122                 ;;
 123         # Recognize the basic CPU types with company name.
 124         vax-* | tahoe-* | i[34]86-* | i860-* | m68k-* | m68000-* | m88k-* \
 125               | sparc-* | ns32k-* | fx80-* | arm-* | c[123]* \
 126               | mips-* | pyramid-* | tron-* | a29k-* | romp-* | rs6000-* \
 127               | none-* | 580-* | cray2-* | h8300-* | i960-* | xmp-* | ymp-* \
 128               | hppa1.0-* | hppa1.1-* | alpha-* | we32k-* | cydra-* | ns16k-* \
 129               | pn-* | np1-* | xps100-* | clipper-* | orion-* | sparclite-* \
 130               | sh-* | powerpc-*)
 131                 ;;
 132         3b1 | 7300 | 7300-att | att-7300 | pc7300 | safari | unixpc)
 133                 basic_machine=m68000-att
 134                 ;;
 135         3b*)
 136                 basic_machine=we32k-att
 137                 ;;
 138         alliant | fx80)
 139                 basic_machine=fx80-alliant
 140                 ;;
 141         altos | altos3068)
 142                 basic_machine=m68k-altos
 143                 ;;
 144         am29k)
 145                 basic_machine=a29k-none
 146                 os=-bsd
 147                 ;;
 148         amdahl)
 149                 basic_machine=580-amdahl
 150                 os=-sysv
 151                 ;;
 152         amiga)
 153                 basic_machine=m68k-cbm
 154                 ;;
 155         amigados)
 156                 basic_machine=m68k-cbm
 157                 os=-amigados
 158                 ;;
 159         amigaunix | amix)
 160                 basic_machine=m68k-cbm
 161                 os=-sysv4
 162                 ;;
 163         apollo68)
 164                 basic_machine=m68k-apollo
 165                 os=-sysv
 166                 ;;
 167         balance)
 168                 basic_machine=ns32k-sequent
 169                 os=-dynix
 170                 ;;
 171         convex-c1)
 172                 basic_machine=c1-convex
 173                 os=-bsd
 174                 ;;
 175         convex-c2)
 176                 basic_machine=c2-convex
 177                 os=-bsd
 178                 ;;
 179         convex-c32)
 180                 basic_machine=c32-convex
 181                 os=-bsd
 182                 ;;
 183         convex-c34)
 184                 basic_machine=c34-convex
 185                 os=-bsd
 186                 ;;
 187         convex-c38)
 188                 basic_machine=c38-convex
 189                 os=-bsd
 190                 ;;
 191         cray | ymp)
 192                 basic_machine=ymp-cray
 193                 os=-unicos
 194                 ;;
 195         cray2)
 196                 basic_machine=cray2-cray
 197                 os=-unicos
 198                 ;;
 199         crds | unos)
 200                 basic_machine=m68k-crds
 201                 ;;
 202         decstation | decstation-3100 | pmax | pmin | dec3100 | decstatn)
 203                 basic_machine=mips-dec
 204                 ;;
 205         delta | 3300 | motorola-3300 | motorola-delta \
 206               | 3300-motorola | delta-motorola)
 207                 basic_machine=m68k-motorola
 208                 ;;
 209         delta88)
 210                 basic_machine=m88k-motorola
 211                 os=-sysv3
 212                 ;;
 213         dpx2* | dpx2*-bull)
 214                 basic_machine=m68k-bull
 215                 os=-sysv3
 216                 ;;
 217         ebmon29k)
 218                 basic_machine=a29k-amd
 219                 os=-ebmon
 220                 ;;
 221         elxsi)
 222                 basic_machine=elxsi-elxsi
 223                 os=-bsd
 224                 ;;
 225         encore | umax | mmax)
 226                 basic_machine=ns32k-encore
 227                 ;;
 228         fx2800)
 229                 basic_machine=i860-alliant
 230                 ;;
 231         genix)
 232                 basic_machine=ns32k-ns
 233                 ;;
 234         gmicro)
 235                 basic_machine=tron-gmicro
 236                 os=-sysv
 237                 ;;
 238         h3050r* | hiux*)
 239                 basic_machine=hppa1.1-hitachi
 240                 os=-hiuxwe2
 241                 ;;
 242         h8300hms)
 243                 basic_machine=h8300-hitachi
 244                 os=-hms
 245                 ;;
 246         harris)
 247                 basic_machine=m88k-harris
 248                 os=-sysv3
 249                 ;;
 250         hp300bsd)
 251                 basic_machine=m68k-hp
 252                 os=-bsd
 253                 ;;
 254         hp300hpux)
 255                 basic_machine=m68k-hp
 256                 os=-hpux
 257                 ;;
 258         hp9k2[0-9][0-9] | hp9k31[0-9])
 259                 basic_machine=m68000-hp
 260                 os=-hpux
 261                 ;;
 262         hp9k3[2-9][0-9])
 263                 basic_machine=m68k-hp
 264                 os=-hpux
 265                 ;;
 266         hp9k31[0-9] | hp9k2[0-9][0-9])
 267                 basic_machine=m68000-hp
 268                 ;;
 269         hp9k7[0-9][0-9] | hp7[0-9][0-9] | hp9k8[0-9]7 | hp8[0-9]7)
 270                 basic_machine=hppa1.1-hp
 271                 ;;
 272         hp9k8[0-9][0-9] | hp8[0-9][0-9])
 273                 basic_machine=hppa1.0-hp
 274                 ;;
 275         i370-ibm* | ibm*)
 276                 basic_machine=i370-ibm
 277                 os=-mvs
 278                 ;;
 279 # I'm not sure what "Sysv32" means.  Should this be sysv3.2?
 280         i[34]86v32)
 281                 basic_machine=`echo $1 | sed -e 's/86.*/86-unknown/'`
 282                 os=-sysv32
 283                 ;;
 284         i[34]86v4*)
 285                 basic_machine=`echo $1 | sed -e 's/86.*/86-unknown/'`
 286                 os=-sysv4
 287                 ;;
 288         i[34]86v)
 289                 basic_machine=`echo $1 | sed -e 's/86.*/86-unknown/'`
 290                 os=-sysv
 291                 ;;
 292         i[34]86sol2)
 293                 basic_machine=`echo $1 | sed -e 's/86.*/86-unknown/'`
 294                 os=-solaris2
 295                 ;;
 296         iris | iris4d)
 297                 basic_machine=mips-sgi
 298                 case $os in
 299                     -irix*)
 300                         ;;
 301                     *)
 302                         os=-irix4
 303                         ;;
 304                 esac
 305                 ;;
 306         isi68 | isi)
 307                 basic_machine=m68k-isi
 308                 os=-sysv
 309                 ;;
 310         m88k-omron*)
 311                 basic_machine=m88k-omron
 312                 ;;
 313         magnum | m3230)
 314                 basic_machine=mips-mips
 315                 os=-sysv
 316                 ;;
 317         merlin)
 318                 basic_machine=ns32k-utek
 319                 os=-sysv
 320                 ;;
 321         miniframe)
 322                 basic_machine=m68000-convergent
 323                 ;;
 324         ncr3000)
 325                 basic_machine=i486-ncr
 326                 os=-sysv4
 327                 ;;
 328         news | news700 | news800 | news900)
 329                 basic_machine=m68k-sony
 330                 os=-newsos
 331                 ;;
 332         news1000)
 333                 basic_machine=m68030-sony
 334                 os=-newsos
 335                 ;;
 336         news-3600 | risc-news)
 337                 basic_machine=mips-sony
 338                 os=-newsos
 339                 ;;
 340         next)
 341                 basic_machine=m68k-next
 342                 os=-bsd
 343                 ;;
 344         nh3000)
 345                 basic_machine=m68k-harris
 346                 os=-cxux
 347                 ;;
 348         nh[45]000)
 349                 basic_machine=m88k-harris
 350                 os=-cxux
 351                 ;;
 352         nindy960)
 353                 basic_machine=i960-intel
 354                 os=-nindy
 355                 ;;
 356         np1)
 357                 basic_machine=np1-gould
 358                 ;;
 359         pa-hitachi)
 360                 basic_machine=hppa1.1-hitachi
 361                 os=-hiuxwe2
 362                 ;;
 363         paragon)
 364                 basic_machine=i860-intel
 365                 os=-osf
 366                 ;;
 367         pbd)
 368                 basic_machine=sparc-tti
 369                 ;;
 370         pbb)
 371                 basic_machine=m68k-tti
 372                 ;;
 373         pc532)
 374                 basic_machine=ns32k-pc532
 375                 ;;
 376         pn)
 377                 basic_machine=pn-gould
 378                 ;;
 379         ps2)
 380                 basic_machine=i386-ibm
 381                 ;;
 382         rtpc | rtpc-*)
 383                 basic_machine=romp-ibm
 384                 ;;
 385         sh)
 386                 basic_machine=sh-hitachi
 387                 os=-hms
 388                 ;;
 389         sps7)
 390                 basic_machine=m68k-bull
 391                 os=-sysv2
 392                 ;;
 393         spur)
 394                 basic_machine=spur-unknown
 395                 ;;
 396         sun2)
 397                 basic_machine=m68000-sun
 398                 ;;
 399         sun2os3)
 400                 basic_machine=m68000-sun
 401                 os=-sunos3
 402                 ;;
 403         sun2os4)
 404                 basic_machine=m68000-sun
 405                 os=-sunos4
 406                 ;;
 407         sun3os3)
 408                 basic_machine=m68k-sun
 409                 os=-sunos3
 410                 ;;
 411         sun3os4)
 412                 basic_machine=m68k-sun
 413                 os=-sunos4
 414                 ;;
 415         sun4os3)
 416                 basic_machine=sparc-sun
 417                 os=-sunos3
 418                 ;;
 419         sun4os4)
 420                 basic_machine=sparc-sun
 421                 os=-sunos4
 422                 ;;
 423         sun3)
 424                 basic_machine=m68k-sun
 425                 ;;
 426         sun4)
 427                 basic_machine=sparc-sun
 428                 ;;
 429         sun386 | sun386i | roadrunner)
 430                 basic_machine=i386-sun
 431                 ;;
 432         symmetry)
 433                 basic_machine=i386-sequent
 434                 os=-dynix
 435                 ;;
 436         tower | tower-32)
 437                 basic_machine=m68k-ncr
 438                 ;;
 439         ultra3)
 440                 basic_machine=a29k-nyu
 441                 os=-sym1
 442                 ;;
 443         # Recognize the various machine names and aliases which stand
 444         # for a CPU type and a company and sometimes even an OS.
 445         vaxv)
 446                 basic_machine=vax-dec
 447                 os=-sysv
 448                 ;;
 449         vms)
 450                 basic_machine=vax-dec
 451                 os=-vms
 452                 ;;
 453         vxworks960)
 454                 basic_machine=i960-wrs
 455                 os=-vxworks
 456                 ;;
 457         vxworks68)
 458                 basic_machine=m68k-wrs
 459                 os=-vxworks
 460                 ;;
 461         xmp)
 462                 basic_machine=xmp-cray
 463                 os=-unicos
 464                 ;;
 465         xps | xps100)
 466                 basic_machine=xps100-honeywell
 467                 ;;
 468         none)
 469                 basic_machine=none-none
 470                 os=-none
 471                 ;;
 472
 473 # Here we handle the default manufacturer of certain CPU types.  It is in
 474 # some cases the only manufacturer, in others, it is the most popular.
 475         mips)
 476                 basic_machine=mips-mips
 477                 ;;
 478         romp)
 479                 basic_machine=romp-ibm
 480                 ;;
 481         rs6000)
 482                 basic_machine=rs6000-ibm
 483                 ;;
 484         vax)
 485                 basic_machine=vax-dec
 486                 ;;
 487         we32k)
 488                 basic_machine=we32k-att
 489                 ;;
 490         sparc)
 491                 basic_machine=sparc-sun
 492                 ;;
 493         cydra)
 494                 basic_machine=cydra-cydrome
 495                 ;;
 496         orion)
 497                 basic_machine=orion-highlevel
 498                 ;;
 499         orion105)
 500                 basic_machine=clipper-highlevel
 501                 ;;
 502         *)
 503                 echo Invalid configuration \`$1\': machine \`$basic_machine\' not recognized 1>&2
 504                 exit 1
 505                 ;;
 506 esac
 507
 508 # Here we canonicalize certain aliases for manufacturers.
 509 case $basic_machine in
 510         *-digital*)
 511                 basic_machine=`echo $basic_machine | sed 's/digital.*/dec/'`
 512                 ;;
 513         *-commodore*)
 514                 basic_machine=`echo $basic_machine | sed 's/commodore.*/cbm/'`
 515                 ;;
 516         *)
 517                 ;;
 518 esac
 519
 520 # Decode manufacturer-specific aliases for certain operating systems.
 521
 522 if [ x"$os" != x"" ]
 523 then
 524 case $os in
 525         # -solaris* is a basic system type, with this one exception.
 526         -solaris1 | -solaris1.*)
 527                 os=`echo $os | sed -e 's|solaris1|sunos4|'`
 528                 ;;
 529         -solaris)
 530                 os=-solaris2
 531                 ;;
 532         # First accept the basic system types.
 533         # The portable systems comes first.
 534         # Each alternative must end in a *, to match a version number.
 535         # -sysv* is not here because it comes later, after sysvr4.
 536         -gnu* | -bsd* | -mach* | -minix* | -genix* | -ultrix* | -irix* \
 537               | -vms* | -sco* | -esix* | -isc* | -aix* | -sunos | -sunos[34]* | -hpux* \
 538               | -unos* | -osf* | -luna* | -dgux* | -solaris* | -sym* \
 539               | -amigados* | -msdos* | -newsos* | -unicos* | -aos* \
 540               | -nindy* | -vxworks* | -ebmon* | -hms* | -mvs* | -clix* \
 541               | -riscos* | -linux* | -uniplus* | -iris* | -rtu* | -xenix* \
 542               | -hiux* | -386bsd* | -netbsd* | -riscix* | -lynxos*)
 543                 ;;
 544         -sunos5*)
 545                 os=`echo $os | sed -e 's|sunos5|solaris2|'`
 546                 ;;
 547         -sunos6*)
 548                 os=`echo $os | sed -e 's|sunos6|solaris3|'`
 549                 ;;
 550         -osfrose*)
 551                 os=-osfrose
 552                 ;;
 553         -osf*)
 554                 os=-osf
 555                 ;;
 556         -utek*)
 557                 os=-bsd
 558                 ;;
 559         -dynix*)
 560                 os=-bsd
 561                 ;;
 562         -acis*)
 563                 os=-aos
 564                 ;;
 565         -ctix* | -uts*)
 566                 os=-sysv
 567                 ;;
 568         -triton*)
 569                 os=-sysv3
 570                 ;;
 571         -oss*)
 572                 os=-sysv3
 573                 ;;
 574         -svr4)
 575                 os=-sysv4
 576                 ;;
 577         -svr3)
 578                 os=-sysv3
 579                 ;;
 580         -sysvr4)
 581                 os=-sysv4
 582                 ;;
 583         # This must come after -sysvr4.
 584         -sysv*)
 585                 ;;
 586         -xenix)
 587                 os=-xenix
 588                 ;;
 589         -none)
 590                 ;;
 591         *)
 592                 # Get rid of the `-' at the beginning of $os.
 593                 os=`echo $1 | sed 's/[^-]*-//'`
 594                 echo Invalid configuration \`$1\': system \`$os\' not recognized 1>&2
 595                 exit 1
 596                 ;;
 597 esac
 598 else
 599
 600 # Here we handle the default operating systems that come with various machines.
 601 # The value should be what the vendor currently ships out the door with their
 602 # machine or put another way, the most popular os provided with the machine.
 603
 604 # Note that if you're going to try to match "-MANUFACTURER" here (say,
 605 # "-sun"), then you have to tell the case statement up towards the top
 606 # that MANUFACTURER isn't an operating system.  Otherwise, code above
 607 # will signal an error saying that MANUFACTURER isn't an operating
 608 # system, and we'll never get to this point.
 609
 610 case $basic_machine in
 611         *-acorn)
 612                 os=-riscix1.2
 613                 ;;
 614         *-dec | vax-*)
 615                 os=-ultrix4.2
 616                 ;;
 617         i386-sun)
 618                 os=-sunos4.0.2
 619                 ;;
 620         m68000-sun)
 621                 os=-sunos3
 622                 # This also exists in the configure program, but was not the
 623                 # default.
 624                 # os=-sunos4
 625                 ;;
 626         *-tti)  # must be before sparc entry or we get the wrong os.
 627                 os=-sysv3
 628                 ;;
 629         sparc-* | *-sun)
 630                 os=-sunos4.1.1
 631                 ;;
 632         *-ibm)
 633                 os=-aix
 634                 ;;
 635         *-hp)
 636                 os=-hpux
 637                 ;;
 638         *-hitachi)
 639                 os=-hiux
 640                 ;;
 641         i860-* | *-att | *-ncr | *-altos | *-motorola | *-convergent)
 642                 os=-sysv
 643                 ;;
 644         *-cbm)
 645                 os=-amigados
 646                 ;;
 647         *-dg)
 648                 os=-dgux
 649                 ;;
 650         *-dolphin)
 651                 os=-sysv3
 652                 ;;
 653         m88k-omron*)
 654                 os=-luna
 655                 ;;
 656         *-sequent)
 657                 os=-bsd
 658                 ;;
 659         *-crds)
 660                 os=-unos
 661                 ;;
 662         *-ns)
 663                 os=-genix
 664                 ;;
 665         i370-*)
 666                 os=-mvs
 667                 ;;
 668         *-next)
 669                 os=-bsd
 670                 ;;
 671         i[34]86-*)
 672                 os=-sco3.2v2
 673                 ;;
 674         *-gould)
 675                 os=-sysv
 676                 ;;
 677         *-highlevel)
 678                 os=-bsd
 679                 ;;
 680         *-encore)
 681                 os=-bsd
 682                 ;;
 683         *-sgi)
 684                 os=-irix
 685                 ;;
 686         *-masscomp)
 687                 os=-rtu
 688                 ;;
 689         *)
 690                 os=-none
 691                 ;;
 692 esac
 693 fi
 694
 695 # Here we handle the case where we know the os, and the CPU type, but not the
 696 # manufacturer.  We pick the logical manufacturer.
 697 vendor=unknown
 698 case $basic_machine in
 699         *-unknown)
 700                 case $os in
 701                         -riscix*)
 702                                 vendor=acorn
 703                                 ;;
 704                         -sunos*)
 705                                 vendor=sun
 706                                 ;;
 707                         -lynxos*)
 708                                 vendor=lynx
 709                                 ;;
 710                         -aix*)
 711                                 vendor=ibm
 712                                 ;;
 713                         -hpux*)
 714                                 vendor=hp
 715                                 ;;
 716                         -hiux*)
 717                                 vendor=hitachi
 718                                 ;;
 719                         -unos*)
 720                                 vendor=crds
 721                                 ;;
 722                         -dgux*)
 723                                 vendor=dg
 724                                 ;;
 725                         -luna*)
 726                                 vendor=omron
 727                                 ;;
 728                         -genix*)
 729                                 vendor=ns
 730                                 ;;
 731                         -mvs*)
 732                                 vendor=ibm
 733                                 ;;
 734                 esac
 735                 basic_machine=`echo $basic_machine | sed "s/unknown/$vendor/"`
 736                 ;;
 737 esac
 738
 739 echo $basic_machine$os