gas/configure.in

   1 dnl Process this file with autoconf to produce a configure script.
   2 dnl
   3 dnl And be careful when changing it!  If you must add tests with square
   4 dnl brackets, be sure changequote invocations surround it.
   5 dnl
   6 dnl
   7 AC_PREREQ(2.3)dnl We only need 2.0, but pre-2.3 loses on some AIX version.
   8 AC_INIT(as.h)dnl
   9 dnl
  10 user_bfd_gas=
  11 AC_ARG_ENABLE(bfd-assembler,
  12 [  --enable-bfd-assembler  use BFD back end for writing object files],
  13 [case "${enableval}" in
  14   yes) need_bfd=yes user_bfd_gas=yes ;;
  15   no)  user_bfd_gas=no ;;
  16   *)   AC_MSG_ERROR(bad value ${enableval} given for bfd-assembler option) ;;
  17 esac])dnl
  18 AC_ARG_ENABLE(targets,
  19 [    targets            alternative target configurations besides the primary],
  20 [case "${enableval}" in
  21   yes | "") AC_ERROR(enable-targets option must specify target names or 'all')
  22             ;;
  23   no)       enable_targets= ;;
  24   *)        enable_targets=$enableval ;;
  25 esac])dnl
  26
  27 # Generate a header file -- gets more post-processing by Makefile later.
  28 AC_CONFIG_HEADER(conf)
  29
  30 dnl For recursion to work right, this must be an absolute pathname.
  31 AC_CONFIG_AUX_DIR(`cd $srcdir;pwd`/..)
  32 AC_CANONICAL_SYSTEM
  33 AC_ARG_PROGRAM
  34
  35 te_file=generic
  36
  37 # assign cpu type
  38
  39 # check for architecture variants
  40 case ${target_cpu} in
  41   armeb)        cpu_type=arm endian=big ;;
  42   arm*)         cpu_type=arm endian=little ;;
  43   hppa*)        cpu_type=hppa ;;
  44 changequote(,)dnl
  45   i[45]86)      cpu_type=i386 ;;
  46   m680[012346]0) cpu_type=m68k ;;
  47   m68008)       cpu_type=m68k ;;
  48   m683??)       cpu_type=m68k ;;
  49 changequote([,])dnl
  50   m8*)          cpu_type=m88k ;;
  51   mips*el)      cpu_type=mips endian=little;;
  52   mips*)        cpu_type=mips endian=big ;;
  53   powerpcle*)   cpu_type=ppc endian=little ;;
  54   powerpc*)     cpu_type=ppc endian=big ;;
  55   rs6000*)      cpu_type=ppc ;;
  56   sparc64)      cpu_type=sparc
  57                 AC_DEFINE(SPARC_V9) ;;
  58   sparclite*)   cpu_type=sparc ;;
  59   *)            cpu_type=${target_cpu} ;;
  60 esac
  61
  62 # do we need the opcodes library?
  63 case ${cpu_type} in
  64   alpha | vax)
  65     ;;
  66   *)
  67     OPCODES_LIB="../opcodes/libopcodes.a"
  68     ;;
  69 esac
  70 AC_SUBST(OPCODES_LIB)
  71
  72 gas_target=${cpu_type}
  73 this_target=${generic_target}
  74
  75 canon_targets=""
  76 if test -n "$enable_targets" ; then
  77   for t in `echo $enable_targets | sed 's/,/ /g'`; do
  78     result=`$ac_config_sub $t 2>/dev/null`
  79     if test -n "$result" ; then
  80       canon_targets="$canon_targets $result"
  81 #    else
  82 #      # Permit "all", etc.  We don't support it yet though.
  83 #      canon_targets="$canon_targets $t"
  84     fi
  85   done
  86   GAS_UNIQ(canon_targets)
  87 fi
  88
  89 emulations=""
  90
  91 for this_target in $target $canon_targets ; do
  92
  93     eval `echo $this_target | sed 's/^\(.*\)-\(.*\)-\(.*\)$/cpu=\1 vendor=\2 os=\3/'`
  94
  95     # check for architecture variants
  96     case ${cpu} in
  97       hppa*)            cpu_type=hppa ;;
  98 changequote(,)dnl
  99       i[45]86)          cpu_type=i386 ;;
 100       m680[012346]0)    cpu_type=m68k ;;
 101       m68008)           cpu_type=m68k ;;
 102       m683??)           cpu_type=m68k ;;
 103 changequote([,])dnl
 104       m8*)              cpu_type=m88k ;;
 105       mips*el)          cpu_type=mips endian=little;;
 106       mips*)            cpu_type=mips endian=big ;;
 107       powerpcle*)       cpu_type=ppc endian=little ;;
 108       powerpc*)         cpu_type=ppc endian=big ;;
 109       rs6000*)          cpu_type=ppc ;;
 110       sparc64)          cpu_type=sparc want_sparc_v9=true ;;
 111       sparclite*)       cpu_type=sparc ;;
 112       *)                cpu_type=${cpu} ;;
 113     esac
 114
 115     if test ${this_target} = $target ; then
 116       target_cpu_type=${cpu_type}
 117     elif test ${target_cpu_type} != ${cpu_type} ; then
 118       continue
 119     fi
 120
 121     targ=${cpu_type}
 122     generic_target=${cpu_type}-$vendor-$os
 123     dev=no
 124     bfd_gas=no
 125     em=generic
 126
 127     # assign object format
 128     case ${generic_target} in
 129       a29k-amd-udi)         fmt=coff targ=ebmon29k ;;
 130       a29k-amd-ebmon)       fmt=coff targ=ebmon29k ;;
 131       a29k-nyu-sym1)        fmt=coff targ=ebmon29k ;;
 132       a29k-*-vxworks*)      fmt=coff ;;
 133
 134       alpha-*-netware*)     fmt=ecoff ;;
 135       alpha-*-osf*)         fmt=ecoff ;;
 136       alpha-*-linux*)       fmt=ecoff ;;
 137
 138 # start-sanitize-arc
 139       arc-*-elf*)           fmt=elf bfd_gas=yes ;;
 140 # end-sanitize-arc
 141
 142       arm-*-riscix*)        fmt=aout targ=arm-lit ;;
 143       arm-*-aout)           fmt=aout
 144                             case "$endian" in
 145                               big)      targ=arm-big ;;
 146                               *)        targ=arm-lit ;;
 147                             esac
 148                             ;;
 149       arm-*-coff)           fmt=coff ;;
 150       arm-*-riscix*)        fmt=aout ;;
 151       arm-*-pe)             fmt=coff targ=armcoff em=pe ;;
 152
 153       hppa-*-*elf*)         fmt=elf em=hppa ;;
 154       hppa-*-lites*)        fmt=elf em=hppa ;;
 155       hppa-*-osf*)          fmt=som em=hppa ;;
 156       hppa-*-hpux*)         fmt=som em=hppa ;;
 157       hppa-*-bsd*)          fmt=som em=hppa ;;
 158       hppa-*-hiux*)         fmt=som em=hppa ;;
 159
 160       h8300-*-coff)         fmt=coff ;;
 161
 162       i386-ibm-aix*)        fmt=coff targ=i386coff
 163                              em=i386aix ;;
 164       i386-*-bsd*)          fmt=aout em=386bsd ;;
 165       i386-*-netbsd0.8)     fmt=aout em=386bsd ;;
 166       i386-*-netbsd*)       fmt=aout em=nbsd bfd_gas=yes;;
 167       i386-*-linux*aout* | i386-*-linuxoldld)   fmt=aout em=linux ;;
 168       i386-*-linux*coff*)   fmt=coff em=linux
 169                              targ=i386coff ;;
 170       i386-*-linux*)        fmt=elf em=linux ;;
 171       i386-*-lynxos*)       fmt=coff targ=i386coff
 172                              em=lynx ;;
 173       i386-*-sysv4* | i386-*-solaris* | i386-*-elf)
 174                             fmt=elf ;;
 175       i386-*-sco*elf*)      fmt=elf targ=sco5 ;;
 176       i386-*-coff | i386-*-sysv* | i386-*-sco* | i386-*-isc*)
 177                             fmt=coff targ=i386coff ;;
 178       i386-*-vsta)          fmt=aout ;;
 179       i386-*-go32)          fmt=coff targ=i386coff ;;
 180       i386-*-gnu*)          fmt=elf ;;
 181       i386-*-mach*)
 182                             fmt=aout em=mach bfd_gas=yes ;;
 183       i386-*-msdos*)        fmt=aout ;;
 184       i386-*-moss*)         fmt=elf ;;
 185       i386-*-pe)            fmt=coff targ=i386coff em=pe ;;
 186       i386-*-win32)         fmt=coff targ=i386coff em=pe ;;
 187       i386-*-*nt)           fmt=coff targ=i386coff em=pe ;;
 188       i960-*-bout)          fmt=bout ;;
 189       i960-*-coff)          fmt=coff em=ic960 targ=ic960coff ;;
 190       i960-*-nindy*)        fmt=bout ;;
 191       i960-*-vxworks4*)     fmt=bout ;;
 192       i960-*-vxworks5.0)    fmt=bout ;;
 193       i960-*-vxworks5.*)    fmt=coff em=ic960 targ=ic960coff ;;
 194       i960-*-vxworks*)      fmt=bout ;;
 195
 196       m68k-*-vxworks* | m68k-ericsson-ose | m68k-*-sunos*)
 197                             fmt=aout em=sun3 ;;
 198       m68k-motorola-sysv*)  fmt=coff targ=m68kcoff em=delta ;;
 199       m68k-bull-sysv3*)     fmt=coff targ=m68kcoff em=dpx2 ;;
 200       m68k-apollo-*)        fmt=coff targ=apollo em=apollo ;;
 201       m68k-*-sysv4 | m68k-*-elf) # must be before -sysv*
 202                             fmt=elf ;;
 203       m68k-*-coff | m68k-*-sysv*)
 204                             fmt=coff targ=m68kcoff ;;
 205       m68k-*-hpux*)         fmt=hp300 em=hp300 ;;
 206       m68k-*-lynxos*)       fmt=coff targ=m68kcoff
 207                              em=lynx ;;
 208       m68k-*-netbsd*)       fmt=aout em=nbsd bfd_gas=yes ;;
 209       m68*-apple-aux*)      fmt=coff targ=m68kcoff em=aux ;;
 210
 211       m88k-motorola-sysv3*) fmt=coff targ=m88kcoff em=delt88 ;;
 212       m88k-*-coff*)         fmt=coff targ=m88kcoff ;;
 213
 214       # don't change em like *-*-bsd does
 215       mips-dec-netbsd*)     fmt=elf targ=mips-lit endian=little ;;
 216       mips-dec-bsd*)        fmt=aout targ=mips-lit ;;
 217       mips-sony-bsd*)       fmt=ecoff targ=mips-big ;;
 218       mips-*-bsd*)          AC_MSG_ERROR(Unknown vendor for mips-bsd configuration.) ;;
 219       mips-*-ultrix*)       fmt=ecoff targ=mips-lit endian=little ;;
 220       mips-*-ecoff*)        fmt=ecoff
 221                             case "$endian" in
 222                             big) targ=mips-big ;;
 223                             *)   targ=mips-lit ;;
 224                             esac
 225                             ;;
 226       mips-*-ecoff*)        fmt=ecoff targ=mips-big ;;
 227       mips-*-gnu*)          fmt=aout
 228                             case "$endian" in
 229                             big) targ=mips-big ;;
 230                             *)   targ=mips-lit ;;
 231                             esac
 232                             ;;
 233       mips-*-irix5*)        fmt=elf targ=mips-big ;;
 234       mips-*-irix*)         fmt=ecoff targ=mips-big ;;
 235       mips-*-riscos*)       fmt=ecoff targ=mips-big ;;
 236       mips-*-sysv*)         fmt=ecoff targ=mips-big ;;
 237       mips-*-elf*)          fmt=elf
 238                             case "$endian" in
 239                             big) targ=mips-big ;;
 240                             *)   targ=mips-lit ;;
 241                             esac
 242                             ;;
 243       ppc-*-pe)             fmt=coff em=pe
 244                             case "$endian" in
 245                             big) targ=ppc-big ;;
 246                             *)   targ=ppc-lit ;;
 247                             esac
 248                             ;;
 249       ppc-*-winnt*)         fmt=coff em=pe
 250                             case "$endian" in
 251                             big) targ=ppc-big ;;
 252                             *)   targ=ppc-lit ;;
 253                             esac
 254                             ;;
 255       ppc-*-aix*)           fmt=coff ;;
 256       ppc-*-elf* | ppc-*-eabi* | ppc-*-sysv4*)
 257                             fmt=elf
 258                             case "$endian" in
 259                             big)  targ=ppc-big ;;
 260                             *)    targ=ppc-lit ;;
 261                             esac
 262                             ;;
 263       ppc-*-macos* | ppc-*-mpw*)
 264                             fmt=coff em=macos ;;
 265       ppc-*-netware*)       fmt=elf em=ppcnw ;;
 266
 267       sh-*-coff)            fmt=coff ;;
 268
 269 # start-sanitize-rce
 270       rce-*-aout)           fmt=aout ;;
 271 # end-sanitize-rce
 272
 273       ns32k-pc532-mach* | ns32k-pc532-ux*)    fmt=aout em=pc532mach ;;
 274       ns32k-pc532-netbsd* | ns32k-pc532-lites*)  fmt=aout em=nbsd532 ;;
 275
 276       sparc-*-sunos4*)      fmt=aout em=sun3 ;;
 277       sparc-*-aout | sparc*-*-vxworks)
 278                             fmt=aout ;;
 279       sparc-*-coff)         fmt=coff ;;
 280       sparc-*-lynxos*)      fmt=coff em=lynx ;;
 281       sparc-fujitsu-none)   fmt=aout ;;
 282       sparc-*-elf | sparc*-*-solaris*)
 283                             fmt=elf ;;
 284       sparc-*-netbsd*)      fmt=aout em=nbsd bfd_gas=yes ;;
 285
 286       vax-*-bsd* | vax-*-ultrix*)
 287                             fmt=aout ;;
 288       vax-*-vms)            fmt=vms ;;
 289
 290       z8k-*-coff | z8k-*-sim)
 291                             fmt=coff ;;
 292
 293       w65-*-*)              fmt=coff ;;
 294
 295       *-*-aout | *-*-scout)
 296                             fmt=aout ;;
 297       *-*-nindy*)
 298                             fmt=bout ;;
 299       *-*-bsd*)
 300                             fmt=aout em=sun3 ;;
 301       *-*-generic)          fmt=generic ;;
 302       *-*-xray | *-*-hms)   fmt=coff ;;
 303       *-*-sim)              fmt=coff ;;
 304       *-*-elf | *-*-sysv4* | *-*-solaris*)
 305                             AC_MSG_WARN(GAS support for ${generic_target} is incomplete.)
 306                             fmt=elf dev=yes ;;
 307       *-*-vxworks)          fmt=aout ;;
 308       *-*-netware)          fmt=elf ;;
 309     esac
 310
 311     case ${cpu_type}-${fmt} in
 312       arm-*)    bfd_gas=yes ;;
 313     # not yet
 314     # i386-aout)        bfd_gas=preferred ;;
 315       mips-*)   bfd_gas=yes ;;
 316       ns32k-*)  bfd_gas=yes ;;
 317       ppc-*)    bfd_gas=yes ;;
 318       sparc-*)  bfd_gas=yes ;;
 319       *-elf)    bfd_gas=yes ;;
 320       *-ecoff)  bfd_gas=yes ;;
 321       *-som)    bfd_gas=yes ;;
 322       *)                ;;
 323     esac
 324
 325 # Other random stuff.
 326
 327     test -n "$want_sparc_v9" && AC_DEFINE(SPARC_V9)
 328
 329     case ${cpu}-${vendor}-${os} in
 330       sparc64-*-elf*) AC_DEFINE(SPARC_ARCH64) ;;
 331     esac
 332
 333     case ${cpu_type} in
 334       m68k) extra_objects="$extra_objects m68k-parse.o" ;;
 335     esac
 336
 337 # See if we really can support this configuration with the emulation code.
 338
 339     if test $this_target = $target ; then
 340       primary_bfd_gas=$bfd_gas
 341       obj_format=$fmt
 342       gas_target=$targ
 343       te_file=$em
 344
 345       if test $bfd_gas = no ; then
 346         # Can't support other configurations this way.
 347         break
 348       fi
 349     elif test $bfd_gas = no ; then
 350       # Can't support this configuration.
 351       break
 352     fi
 353
 354 # From target name and format, produce a list of supported emulations.
 355
 356     case ${generic_target}-${fmt} in
 357       mips-*-irix5*-*)  emulation="mipsbelf mipslelf mipself mipsbecoff mipslecoff mipsecoff" ;;
 358       mips-*-*-ecoff)   case "$endian" in
 359                         big)    emulation="mipsbecoff mipslecoff mipsecoff" ;;
 360                         *)      emulation="mipslecoff mipsbecoff mipsecoff" ;;
 361                         esac ;;
 362       mips-*-*-elf)     case "$endian" in
 363                         big)    emulation="mipsbelf mipslelf mipself" ;;
 364                         *)      emulation="mipslelf mipsbelf mipself" ;;
 365                         esac ;;
 366     esac
 367
 368     emulations="$emulations $emulation"
 369
 370 done
 371
 372 # Assign floating point type.  Most processors with FP support
 373 # IEEE FP.  On those that don't support FP at all, usually IEEE
 374 # is emulated.
 375 case ${target_cpu} in
 376   vax | tahoe ) atof=${target_cpu} ;;
 377   *)            atof=ieee ;;
 378 esac
 379
 380 case "${obj_format}" in
 381   "") AC_MSG_ERROR(GAS does not know what format to use for target ${target}) ;;
 382 esac
 383
 384 dnl
 385 dnl Make sure the desired support files exist.
 386 dnl
 387
 388 if test ! -r ${srcdir}/config/tc-${target_cpu_type}.c; then
 389   AC_MSG_ERROR(GAS does not support target CPU ${target_cpu_type})
 390 fi
 391
 392 if test ! -r ${srcdir}/config/obj-${obj_format}.c; then
 393   AC_MSG_ERROR(GAS does not have support for object file format ${obj_format})
 394 fi
 395
 396 # and target makefile frag
 397
 398 target_frag=${srcdir}/config/${gas_target}.mt
 399 if test ! -r ${target_frag}; then
 400   target_frag=/dev/null # ick! but subst_file can't be conditionalized
 401 fi
 402 AC_SUBST_FILE(target_frag)
 403
 404 case ${user_bfd_gas}-${primary_bfd_gas} in
 405   yes-yes | no-no)
 406     # We didn't override user's choice.
 407     ;;
 408   no-yes)
 409     AC_MSG_WARN(Use of BFD is required for ${target}; overriding config options.)
 410     ;;
 411   no-preferred)
 412     primary_bfd_gas=no
 413     ;;
 414   *-preferred)
 415     primary_bfd_gas=yes
 416     ;;
 417   yes-*)
 418     primary_bfd_gas=yes
 419     ;;
 420   -*)
 421     # User specified nothing.
 422     ;;
 423 esac
 424
 425 # Some COFF configurations want these random other flags set.
 426 case ${obj_format} in
 427   coff)
 428     case ${target_cpu_type} in
 429       i386) AC_DEFINE(I386COFF) ;;
 430       m68k) AC_DEFINE(M68KCOFF) ;;
 431       m88k) AC_DEFINE(M88KCOFF) ;;
 432     esac
 433     ;;
 434 esac
 435
 436 # Getting this done right is going to be a bitch.  Each configuration specified
 437 # with --enable-targets=... should be checked for environment, format, cpu, and
 438 # bfd_gas setting.
 439 #
 440 # For each configuration, the necessary object file support code must be linked
 441 # in.  This might be only one, it might be up to four.  The necessary emulation
 442 # code needs to be provided, too.
 443 #
 444 # And then there's "--enable-targets=all"....
 445 #
 446 # For now, just always do it for MIPS ELF or ECOFF configurations.  Sigh.
 447
 448 formats="${obj_format}"
 449 emfiles=""
 450 EMULATIONS=""
 451 GAS_UNIQ(emulations)
 452 for em in . $emulations ; do
 453   case $em in
 454     .)  continue ;;
 455     mipsbelf | mipslelf)
 456         fmt=elf   file=mipself ;;
 457     mipsbecoff | mipslecoff)
 458         fmt=ecoff file=mipsecoff ;;
 459   esac
 460   formats="$formats $fmt"
 461   emfiles="$emfiles e-$file.o"
 462   EMULATIONS="$EMULATIONS &$em,"
 463 done
 464 GAS_UNIQ(formats)
 465 GAS_UNIQ(emfiles)
 466 if test `set . $formats ; shift ; echo $#` -gt 1 ; then
 467   for fmt in $formats ; do
 468     case $fmt in
 469       aout)     AC_DEFINE(OBJ_MAYBE_AOUT)    ;;
 470       bout)     AC_DEFINE(OBJ_MAYBE_BOUT)    ;;
 471       coff)     AC_DEFINE(OBJ_MAYBE_COFF)    ;;
 472       ecoff)    AC_DEFINE(OBJ_MAYBE_ECOFF)   ;;
 473       elf)      AC_DEFINE(OBJ_MAYBE_ELF)     ;;
 474       generic)  AC_DEFINE(OBJ_MAYBE_GENERIC) ;;
 475       hp300)    AC_DEFINE(OBJ_MAYBE_HP300)   ;;
 476       ieee)     AC_DEFINE(OBJ_MAYBE_IEEE)    ;;
 477       som)      AC_DEFINE(OBJ_MAYBE_SOM)     ;;
 478       vms)      AC_DEFINE(OBJ_MAYBE_VMS)     ;;
 479     esac
 480     extra_objects="$extra_objects obj-$fmt.o"
 481   done
 482   obj_format=multi
 483 fi
 484 if test `set . $emfiles ; shift ; echo $#` -gt 0 ; then
 485   te_file=multi
 486   extra_objects="$extra_objects $emfiles"
 487   DEFAULT_EMULATION=`set . $emulations ; echo $2`
 488   AC_DEFINE(USE_EMULATIONS)
 489 fi
 490 AC_SUBST(extra_objects)
 491 AC_DEFINE_UNQUOTED(EMULATIONS, $EMULATIONS)
 492 AC_DEFINE_UNQUOTED(DEFAULT_EMULATION, "$DEFAULT_EMULATION")
 493
 494 files="config/tc-${target_cpu_type}.c config/tc-${target_cpu_type}.h \
 495         config/obj-${obj_format}.h config/obj-${obj_format}.c \
 496         config/te-${te_file}.h config/atof-${atof}.c \
 497         $extra_files"
 498 links="targ-cpu.c targ-cpu.h obj-format.h obj-format.c targ-env.h atof-targ.c \
 499         $extra_links"
 500
 501 case ${primary_bfd_gas}-${target_cpu_type}-${obj_format} in
 502   yes-*-coff)   need_bfd=yes ;;
 503   no-*-coff)    need_bfd=yes
 504                 AC_DEFINE(MANY_SEGMENTS) ;;
 505 esac
 506
 507 reject_dev_configs=yes
 508
 509 case ${reject_dev_configs}-${dev} in
 510   yes-yes) # Oops.
 511     AC_MSG_ERROR(GAS does not support the ${generic_target} configuration.)
 512     ;;
 513 esac
 514
 515 AC_SUBST(target_cpu_type)
 516 AC_SUBST(obj_format)
 517 AC_SUBST(atof)
 518 dnl AC_SUBST(emulation)
 519
 520 AC_LINK_FILES($files, $links)
 521
 522 case "${primary_bfd_gas}" in
 523   yes)  AC_DEFINE(BFD_ASSEMBLER)
 524         need_bfd=yes ;;
 525 esac
 526
 527 case "${need_bfd}" in
 528   yes)  BFDLIB=../bfd/libbfd.a
 529         ALL_OBJ_DEPS="$ALL_OBJ_DEPS ../bfd/bfd.h"
 530         ;;
 531 esac
 532 AC_SUBST(BFDLIB)
 533 AC_SUBST(ALL_OBJ_DEPS)
 534
 535 AC_DEFINE_UNQUOTED(TARGET_ALIAS,        "${target_alias}")
 536 AC_DEFINE_UNQUOTED(TARGET_CANONICAL,    "${target}")
 537 AC_DEFINE_UNQUOTED(TARGET_CPU,          "${target_cpu}")
 538 AC_DEFINE_UNQUOTED(TARGET_VENDOR,       "${target_vendor}")
 539 AC_DEFINE_UNQUOTED(TARGET_OS,           "${target_os}")
 540
 541 AC_PROG_CC
 542 AC_PROG_INSTALL
 543
 544 AC_CHECK_HEADERS(string.h stdlib.h memory.h strings.h unistd.h stdarg.h varargs.h errno.h sys/types.h)
 545
 546 # Put this here so that autoconf's "cross-compiling" message doesn't confuse
 547 # people who are not cross-compiling but are compiling cross-assemblers.
 548 AC_MSG_CHECKING(whether compiling a cross-assembler)
 549 if test "${host}" = "${target}"; then
 550   cross_gas=no
 551 else
 552   cross_gas=yes
 553   AC_DEFINE(CROSS_COMPILE)
 554 fi
 555 AC_MSG_RESULT($cross_gas)
 556
 557 dnl ansidecl.h will deal with const
 558 dnl AC_CONST
 559 AC_FUNC_ALLOCA
 560 AC_C_INLINE
 561
 562 # VMS doesn't have unlink.
 563 AC_CHECK_FUNCS(unlink remove, break)
 564
 565 # Some systems don't have sbrk().
 566 AC_CHECK_FUNCS(sbrk)
 567
 568 # Some non-ANSI preprocessors botch requoting inside strings.  That's bad
 569 # enough, but on some of those systems, the assert macro relies on requoting
 570 # working properly!
 571 GAS_WORKING_ASSERT
 572
 573 # On some systems, the system header files may not declare malloc, realloc,
 574 # and free.  There are places where gas needs these functions to have been
 575 # declared -- such as when taking their addresses.
 576 gas_test_headers="
 577 #ifdef HAVE_MEMORY_H
 578 #include <memory.h>
 579 #endif
 580 #ifdef HAVE_STRING_H
 581 #include <string.h>
 582 #endif
 583 #ifdef HAVE_STDLIB_H
 584 #include <stdlib.h>
 585 #endif
 586 #ifdef HAVE_UNISTD_H
 587 #include <unistd.h>
 588 #endif
 589 "
 590 GAS_CHECK_DECL_NEEDED(malloc, f, char *(*f)(), $gas_test_headers)
 591 GAS_CHECK_DECL_NEEDED(free, f, void (*f)(), $gas_test_headers)
 592
 593 # Does errno.h declare errno, or do we have to add a separate declaration
 594 # for it?
 595 GAS_CHECK_DECL_NEEDED(errno, f, int f, [
 596 #ifdef HAVE_ERRNO_H
 597 #include <errno.h>
 598 #endif
 599 ])
 600
 601 dnl This must come last.
 602 AC_OUTPUT(Makefile doc/Makefile .gdbinit:gdbinit.in)