config-ml.in

   1 # Configure fragment invoked in the post-target section for subdirs
   2 # wanting multilib support.
   3 #
   4 # It is advisable to support a few --enable/--disable options to let the
   5 # user select which libraries s/he really wants.
   6 #
   7 # Subdirectories wishing to use multilib should put the following lines
   8 # in the "post-target" section of configure.in.
   9 #
  10 # if [ "${srcdir}" = "." ] ; then
  11 #   if [ "${with_target_subdir}" != "." ] ; then
  12 #     . ${with_multisrctop}../../config-ml.in
  13 #   else
  14 #     . ${with_multisrctop}../config-ml.in
  15 #   fi
  16 # else
  17 #   . ${srcdir}/../config-ml.in
  18 # fi
  19 #
  20 # See librx/configure.in in the libg++ distribution for an example of how
  21 # to handle autoconf'd libraries.
  22 #
  23 # Things are complicated because 6 separate cases must be handled:
  24 # 2 (native, cross) x 3 (absolute-path, relative-not-dot, dot) = 6.
  25 #
  26 # srcdir=. is special.  It must handle make programs that don't handle VPATH.
  27 # To implement this, a symlink tree is built for each library and for each
  28 # multilib subdir.
  29 #
  30 # The build tree is layed out as
  31 #
  32 # ./
  33 #   libg++
  34 #   newlib
  35 #   m68020/
  36 #          libg++
  37 #          newlib
  38 #          m68881/
  39 #                 libg++
  40 #                 newlib
  41 #
  42 # The nice feature about this arrangement is that inter-library references
  43 # in the build tree work without having to care where you are.  Note that
  44 # inter-library references also work in the source tree because symlink trees
  45 # are built when srcdir=.
  46 #
  47 # Unfortunately, trying to access the libraries in the build tree requires
  48 # the user to manually choose which library to use as GCC won't be able to
  49 # find the right one.  This is viewed as the lesser of two evils.
  50 #
  51 # Configure variables:
  52 # ${with_target_subdir} = "." for native, or ${target_alias} for cross.
  53 # Set by top level Makefile.
  54 # ${with_multisrctop} = how many levels of multilibs there are in the source
  55 # tree.  It exists to handle the case of configuring in the source tree:
  56 # ${srcdir} is not constant.
  57 # ${with_multisubdir} = name of multilib subdirectory (eg: m68020/m68881).
  58 #
  59 # Makefile variables:
  60 # MULTISRCTOP = number of multilib levels in source tree (+1 if cross)
  61 # (FIXME: note that this is different than ${with_multisrctop}.  Check out.).
  62 # MULTIBUILDTOP = number of multilib levels in build tree
  63 # MULTIDIRS = list of multilib subdirs (eg: m68000 m68020 ...)
  64 # (only defined in each library's main Makefile).
  65 # MULTISUBDIR = installed subdirectory name with leading '/' (eg: /m68000)
  66 # (only defined in each multilib subdir).
  67
  68 # FIXME: Multilib is currently disabled by default for everything other than
  69 # newlib.  It is up to each target to turn on multilib support for the other
  70 # libraries as desired.
  71
  72 # We have to handle being invoked by both Cygnus configure and Autoconf.
  73 #
  74 # Cygnus configure incoming variables:
  75 # srcdir, subdir, host, arguments
  76 #
  77 # Autoconf incoming variables:
  78 # srcdir, host, ac_configure_args
  79 #
  80 # We *could* figure srcdir and host out, but we'd have to do work that
  81 # our caller has already done to figure them out and requiring these two
  82 # seems reasonable.
  83 # Note that `host' in this case is GCC's `target'.  Target libraries are
  84 # configured for a particular host.
  85
  86 if [ -n "${ac_configure_args}" ]; then
  87   Makefile=${ac_file-Makefile}
  88   ml_config_shell=${CONFIG_SHELL-/bin/sh}
  89   ml_arguments="${ac_configure_args}"
  90   ml_realsrcdir=${srcdir}
  91 else
  92   Makefile=${Makefile-Makefile}
  93   ml_config_shell=${config_shell-/bin/sh}
  94   ml_arguments="${arguments}"
  95   if [ -n "${subdir}" -a "${subdir}" != "." ] ; then
  96     ml_realsrcdir=${srcdir}/${subdir}
  97   else
  98     ml_realsrcdir=${srcdir}
  99   fi
 100 fi
 101
 102 # Scan all the arguments and set all the ones we need.
 103
 104 ml_verbose=--verbose
 105 for option in ${ml_arguments}
 106 do
 107   case $option in
 108   --*) ;;
 109   -*) option=-$option ;;
 110   esac
 111
 112   case $option in
 113   --*=*)
 114         optarg=`echo $option | sed -e 's/^[^=]*=//'`
 115         ;;
 116   esac
 117
 118   case $option in
 119   --disable-*)
 120         enableopt=`echo ${option} | sed 's:^--disable-:enable_:;s:-:_:g'`
 121         eval $enableopt=no
 122         ;;
 123   --enable-*)
 124         case "$option" in
 125         *=*)    ;;
 126         *)      optarg=yes ;;
 127         esac
 128         enableopt=`echo ${option} | sed 's:^--::;s:=.*$::;s:-:_:g'`
 129         eval $enableopt="$optarg"
 130         ;;
 131   --norecursion | --no*)
 132         ml_norecursion=yes
 133         ;;
 134   --silent | --sil* | --quiet | --q*)
 135         ml_verbose=--silent
 136         ;;
 137   --verbose | --v | --verb*)
 138         ml_verbose=--verbose
 139         ;;
 140   --with-*)
 141         case "$option" in
 142         *=*)    ;;
 143         *)      optarg=yes ;;
 144         esac
 145         withopt=`echo ${option} | sed 's:^--::;s:=.*$::;s:-:_:g'`
 146         eval $withopt="$optarg"
 147         ;;
 148   --without-*)
 149         withopt=`echo ${option} | sed 's:^--::;s:out::;s:-:_:g'`
 150         eval $withopt=no
 151         ;;
 152   esac
 153 done
 154
 155 # Only do this if --enable-multilib.
 156 if [ "${enable_multilib}" = yes ]; then
 157
 158 # Compute whether this is the library's top level directory
 159 # (ie: not a multilib subdirectory, and not a subdirectory like libg++/src).
 160 # ${with_multisubdir} tells us we're in the right branch, but we could be
 161 # in a subdir of that.
 162 # ??? The previous version could void this test by separating the process into
 163 # two files: one that only the library's toplevel configure.in ran (to
 164 # configure the multilib subdirs), and another that all configure.in's ran to
 165 # update the Makefile.  It seemed reasonable to collapse all multilib support
 166 # into one file, but it does leave us with having to perform this test.
 167 ml_toplevel_p=no
 168 if [ -z "${with_multisubdir}" ]; then
 169   if [ "${srcdir}" = "." ]; then
 170     # Use ${ml_realsrcdir} instead of ${srcdir} here to account for ${subdir}.
 171     # ${with_target_subdir} = "." for native, otherwise target alias.
 172     if [ "${with_target_subdir}" = "." ]; then
 173       if [ -f ${ml_realsrcdir}/../config-ml.in ]; then
 174         ml_toplevel_p=yes
 175       fi
 176     else
 177       if [ -f ${ml_realsrcdir}/../../config-ml.in ]; then
 178         ml_toplevel_p=yes
 179       fi
 180     fi
 181   else
 182     # Use ${ml_realsrcdir} instead of ${srcdir} here to account for ${subdir}.
 183     if [ -f ${ml_realsrcdir}/../config-ml.in ]; then
 184       ml_toplevel_p=yes
 185     fi
 186   fi
 187 fi
 188
 189 # If this is the library's top level directory, set multidirs to the
 190 # multilib subdirs to support.  This lives at the top because we need
 191 # `multidirs' set right away.
 192
 193 if [ "${ml_toplevel_p}" = yes ]; then
 194
 195 multidirs=
 196 for i in `${CC-gcc} --print-multi-lib 2>/dev/null`; do
 197   dir=`echo $i | sed -e 's/;.*$//'`
 198   if [ "${dir}" = "." ]; then
 199     true
 200   else
 201     if [ -z "${multidirs}" ]; then
 202       multidirs="${dir}"
 203     else
 204       multidirs="${multidirs} ${dir}"
 205     fi
 206   fi
 207 done
 208
 209 # Target libraries are configured for the host they run on, so we check
 210 # $host here, not $target.
 211
 212 case "${host}" in
 213 arc-*-elf*)
 214         if [ x$enable_biendian != xyes ]
 215         then
 216           old_multidirs=${multidirs}
 217           multidirs=""
 218           for x in ${old_multidirs}; do
 219             case "${x}" in
 220               *be*) : ;;
 221               *) multidirs="${multidirs} ${x}" ;;
 222             esac
 223           done
 224         fi
 225         ;;
 226 arm-*-*)
 227         if [ x"$enable_fpu" = xno ]
 228         then
 229           old_multidirs=${multidirs}
 230           multidirs=""
 231           for x in ${old_multidirs}; do
 232             case "${x}" in
 233               *fpu*) : ;;
 234               *) multidirs="${multidirs} ${x}" ;;
 235             esac
 236           done
 237         fi
 238         if [ x"$enable_26bit" = xno ]
 239         then
 240           old_multidirs=${multidirs}
 241           multidirs=""
 242           for x in ${old_multidirs}; do
 243             case "${x}" in
 244               *26bit*) : ;;
 245               *) multidirs="${multidirs} ${x}" ;;
 246             esac
 247           done
 248         fi
 249         if [ x"$enable_underscore" = xno ]
 250         then
 251           old_multidirs=${multidirs}
 252           multidirs=""
 253           for x in ${old_multidirs}; do
 254             case "${x}" in
 255               *under*) : ;;
 256               *) multidirs="${multidirs} ${x}" ;;
 257             esac
 258           done
 259         fi
 260         if [ x"$enable_interwork" = xno ]
 261         then
 262           old_multidirs=${multidirs}
 263           multidirs=""
 264           for x in ${old_multidirs}; do
 265             case "${x}" in
 266               *interwork*) : ;;
 267               *) multidirs="${multidirs} ${x}" ;;
 268             esac
 269           done
 270         fi
 271         if [ x$enable_biendian = xno ]
 272         then
 273           old_multidirs="${multidirs}"
 274           multidirs=""
 275           for x in ${old_multidirs}; do
 276             case "$x" in
 277               *le* ) : ;;
 278               *be* ) : ;;
 279               *) multidirs="${multidirs} ${x}" ;;
 280             esac
 281           done
 282         fi
 283         if [ x"$enable_nofmult" = xno ]
 284         then
 285           old_multidirs="${multidirs}"
 286           multidirs=""
 287           for x in ${old_multidirs}; do
 288             case "$x" in
 289               *nofmult* ) : ;;
 290               *) multidirs="${multidirs} ${x}" ;;
 291             esac
 292           done
 293         fi
 294         ;;
 295 m68*-*-*)
 296         if [ x$enable_softfloat = xno ]
 297         then
 298           old_multidirs="${multidirs}"
 299           multidirs=""
 300           for x in ${old_multidirs}; do
 301             case "$x" in
 302               *soft-float* ) : ;;
 303               *) multidirs="${multidirs} ${x}" ;;
 304             esac
 305           done
 306         fi
 307         if [ x$enable_m68881 = xno ]
 308         then
 309           old_multidirs="${multidirs}"
 310           multidirs=""
 311           for x in ${old_multidirs}; do
 312             case "$x" in
 313               *m68881* ) : ;;
 314               *) multidirs="${multidirs} ${x}" ;;
 315             esac
 316           done
 317         fi
 318         if [ x$enable_m68000 = xno ]
 319         then
 320           old_multidirs="${multidirs}"
 321           multidirs=""
 322           for x in ${old_multidirs}; do
 323             case "$x" in
 324               *m68000* ) : ;;
 325               *) multidirs="${multidirs} ${x}" ;;
 326             esac
 327           done
 328         fi
 329         if [ x$enable_m68020 = xno ]
 330         then
 331           old_multidirs="${multidirs}"
 332           multidirs=""
 333           for x in ${old_multidirs}; do
 334             case "$x" in
 335               *m68020* ) : ;;
 336               *) multidirs="${multidirs} ${x}" ;;
 337             esac
 338           done
 339         fi
 340         ;;
 341 mips*-*-*)
 342         if [ x$enable_single_float = xno ]
 343         then
 344           old_multidirs="${multidirs}"
 345           multidirs=""
 346           for x in ${old_multidirs}; do
 347             case "$x" in
 348               *single* ) : ;;
 349               *) multidirs="${multidirs} ${x}" ;;
 350             esac
 351           done
 352         fi
 353         if [ x$enable_biendian = xno ]
 354         then
 355           old_multidirs="${multidirs}"
 356           multidirs=""
 357           for x in ${old_multidirs}; do
 358             case "$x" in
 359               *el* ) : ;;
 360               *eb* ) : ;;
 361               *) multidirs="${multidirs} ${x}" ;;
 362             esac
 363           done
 364         fi
 365         if [ x$enable_softfloat = xno ]
 366         then
 367           old_multidirs="${multidirs}"
 368           multidirs=""
 369           for x in ${old_multidirs}; do
 370             case "$x" in
 371               *soft-float* ) : ;;
 372               *) multidirs="${multidirs} ${x}" ;;
 373             esac
 374           done
 375         fi
 376         case " $multidirs " in
 377         *" mabi=64 "*)
 378           # We will not be able to create libraries with -mabi=64 if
 379           # we cannot even link a trivial program.  It usually
 380           # indicates the 64bit libraries are missing.
 381           if echo 'main() {}' > conftest.c &&
 382              ${CC-gcc} -mabi=64 conftest.c -o conftest; then
 383             :
 384           else
 385             echo Could not link program with -mabi=64, disabling it.
 386             old_multidirs="${multidirs}"
 387             multidirs=""
 388             for x in ${old_multidirs}; do
 389               case "$x" in
 390               *mabi=64* ) : ;;
 391               *) multidirs="${multidirs} ${x}" ;;
 392               esac
 393             done
 394           fi
 395           rm -f conftest.c conftest
 396           ;;
 397         esac
 398         ;;
 399 powerpc*-*-* | rs6000*-*-*)
 400         if [ x$enable_softfloat = xno ]
 401         then
 402           old_multidirs="${multidirs}"
 403           multidirs=""
 404           for x in ${old_multidirs}; do
 405             case "$x" in
 406               *soft-float* ) : ;;
 407               *) multidirs="${multidirs} ${x}" ;;
 408             esac
 409           done
 410         fi
 411         if [ x$enable_powercpu = xno ]
 412         then
 413           old_multidirs="${multidirs}"
 414           multidirs=""
 415           for x in ${old_multidirs}; do
 416             case "$x" in
 417               power | */power | */power/* ) : ;;
 418               *) multidirs="${multidirs} ${x}" ;;
 419             esac
 420           done
 421         fi
 422         if [ x$enable_powerpccpu = xno ]
 423         then
 424           old_multidirs="${multidirs}"
 425           multidirs=""
 426           for x in ${old_multidirs}; do
 427             case "$x" in
 428               *powerpc* ) : ;;
 429               *) multidirs="${multidirs} ${x}" ;;
 430             esac
 431           done
 432         fi
 433         if [ x$enable_powerpcos = xno ]
 434         then
 435           old_multidirs="${multidirs}"
 436           multidirs=""
 437           for x in ${old_multidirs}; do
 438             case "$x" in
 439               *mcall-linux* | *mcall-solaris* ) : ;;
 440               *) multidirs="${multidirs} ${x}" ;;
 441             esac
 442           done
 443         fi
 444         if [ x$enable_biendian = xno ]
 445         then
 446           old_multidirs="${multidirs}"
 447           multidirs=""
 448           for x in ${old_multidirs}; do
 449             case "$x" in
 450               *mlittle* | *mbig* ) : ;;
 451               *) multidirs="${multidirs} ${x}" ;;
 452             esac
 453           done
 454         fi
 455         if [ x$enable_sysv = xno ]
 456         then
 457           old_multidirs="${multidirs}"
 458           multidirs=""
 459           for x in ${old_multidirs}; do
 460             case "$x" in
 461               *mcall-sysv* ) : ;;
 462               *) multidirs="${multidirs} ${x}" ;;
 463             esac
 464           done
 465         fi
 466         if [ x$enable_aix = xno ]
 467         then
 468           old_multidirs="${multidirs}"
 469           multidirs=""
 470           for x in ${old_multidirs}; do
 471             case "$x" in
 472               *mcall-aix* ) : ;;
 473               *) multidirs="${multidirs} ${x}" ;;
 474             esac
 475           done
 476         fi
 477         ;;
 478 sparc*-*-*)
 479         case " $multidirs " in
 480         *" m64 "*)
 481           # We will not be able to create libraries with -m64 if
 482           # we cannot even link a trivial program.  It usually
 483           # indicates the 64bit libraries are missing.
 484           if echo 'main() {}' > conftest.c &&
 485              ${CC-gcc} -m64 conftest.c -o conftest; then
 486             :
 487           else
 488             echo Could not link program with -m64, disabling it.
 489             old_multidirs="${multidirs}"
 490             multidirs=""
 491             for x in ${old_multidirs}; do
 492               case "$x" in
 493               *m64* ) : ;;
 494               *) multidirs="${multidirs} ${x}" ;;
 495               esac
 496             done
 497           fi
 498           rm -f conftest.c conftest
 499           ;;
 500         esac
 501         ;;
 502 esac
 503
 504 # Remove extraneous blanks from multidirs.
 505 # Tests like `if [ -n "$multidirs" ]' require it.
 506 multidirs=`echo "$multidirs" | sed -e 's/^[ ][ ]*//' -e 's/[ ][ ]*$//' -e 's/[ ][ ]*/ /g'`
 507
 508 # Add code to library's top level makefile to handle building the multilib
 509 # subdirs.
 510
 511 cat > Multi.tem <<\EOF
 512
 513 # FIXME: There should be an @-sign in front of the `if'.
 514 # Leave out until this is tested a bit more.
 515 multi-do:
 516         if [ -z "$(MULTIDIRS)" ]; then \
 517           true; \
 518         else \
 519           rootpre=`pwd`/; export rootpre; \
 520           srcrootpre=`cd $(srcdir); pwd`/; export srcrootpre; \
 521           lib=`echo $${rootpre} | sed -e 's,^.*/\([^/][^/]*\)/$$,\1,'`; \
 522           compiler="$(CC)"; \
 523           for i in `$${compiler} --print-multi-lib 2>/dev/null`; do \
 524             dir=`echo $$i | sed -e 's/;.*$$//'`; \
 525             if [ "$${dir}" = "." ]; then \
 526               true; \
 527             else \
 528               if [ -d ../$${dir}/$${lib} ]; then \
 529                 flags=`echo $$i | sed -e 's/^[^;]*;//' -e 's/@/ -/g'`; \
 530                 if (cd ../$${dir}/$${lib}; $(MAKE) $(FLAGS_TO_PASS) \
 531                                 CFLAGS="$(CFLAGS) $${flags}" \
 532                                 prefix="$(prefix)" \
 533                                 exec_prefix="$(exec_prefix)" \
 534                                 CXXFLAGS="$(CXXFLAGS) $${flags}" \
 535                                 LIBCFLAGS="$(LIBCFLAGS) $${flags}" \
 536                                 LIBCXXFLAGS="$(LIBCXXFLAGS) $${flags}" \
 537                                 LDFLAGS="$(LDFLAGS) $${flags}" \
 538                                 $(DO)); then \
 539                   true; \
 540                 else \
 541                   exit 1; \
 542                 fi; \
 543               else true; \
 544               fi; \
 545             fi; \
 546           done; \
 547         fi
 548
 549 # FIXME: There should be an @-sign in front of the `if'.
 550 # Leave out until this is tested a bit more.
 551 multi-clean:
 552         if [ -z "$(MULTIDIRS)" ]; then \
 553           true; \
 554         else \
 555           lib=`pwd | sed -e 's,^.*/\([^/][^/]*\)$$,\1,'`; \
 556           for dir in Makefile $(MULTIDIRS); do \
 557             if [ -f ../$${dir}/$${lib}/Makefile ]; then \
 558               if (cd ../$${dir}/$${lib}; $(MAKE) $(FLAGS_TO_PASS) $(DO)); \
 559               then true; \
 560               else exit 1; \
 561               fi; \
 562             else true; \
 563             fi; \
 564           done; \
 565         fi
 566 EOF
 567
 568 cat ${Makefile} Multi.tem > Makefile.tem
 569 rm -f ${Makefile} Multi.tem
 570 mv Makefile.tem ${Makefile}
 571
 572 fi # ${ml_toplevel_p} = yes
 573
 574 if [ "${ml_verbose}" = --verbose ]; then
 575   echo "Adding multilib support to Makefile in ${ml_realsrcdir}"
 576   if [ "${ml_toplevel_p}" = yes ]; then
 577     echo "multidirs=${multidirs}"
 578   fi
 579   echo "with_multisubdir=${with_multisubdir}"
 580 fi
 581
 582 if [ "${srcdir}" = "." ]; then
 583   if [ "${with_target_subdir}" != "." ]; then
 584     ml_srcdotdot="../"
 585   else
 586     ml_srcdotdot=""
 587   fi
 588 else
 589   ml_srcdotdot=""
 590 fi
 591
 592 if [ -z "${with_multisubdir}" ]; then
 593   ml_subdir=
 594   ml_builddotdot=
 595   : # ml_srcdotdot= # already set
 596 else
 597   ml_subdir="/${with_multisubdir}"
 598   # The '[^/][^/]*' appears that way to work around a SunOS sed bug.
 599   ml_builddotdot=`echo ${with_multisubdir} | sed -e 's:[^/][^/]*:..:g'`/
 600   if [ "$srcdir" = "." ]; then
 601     ml_srcdotdot=${ml_srcdotdot}${ml_builddotdot}
 602   else
 603     : # ml_srcdotdot= # already set
 604   fi
 605 fi
 606
 607 if [ "${ml_toplevel_p}" = yes ]; then
 608   ml_do='$(MAKE)'
 609   ml_clean='$(MAKE)'
 610 else
 611   ml_do=true
 612   ml_clean=true
 613 fi
 614
 615 # TOP is used by newlib and should not be used elsewhere for this purpose.
 616 # MULTI{SRC,BUILD}TOP are the proper ones to use.  MULTISRCTOP is empty
 617 # when srcdir != builddir.  MULTIBUILDTOP is always some number of ../'s.
 618 # FIXME: newlib needs to be updated to use MULTI{SRC,BUILD}TOP so we can
 619 # delete TOP.  Newlib may wish to continue to use TOP for its own purposes
 620 # of course.
 621 # MULTIDIRS is non-empty for the cpu top level Makefile (eg: newlib/Makefile)
 622 # and lists the subdirectories to recurse into.
 623 # MULTISUBDIR is non-empty in each cpu subdirectory's Makefile
 624 # (eg: newlib/h8300h/Makefile) and is the installed subdirectory name with
 625 # a leading '/'.
 626 # MULTIDO is used for targets like all, install, and check where
 627 # $(FLAGS_TO_PASS) augmented with the subdir's compiler option is needed.
 628 # MULTICLEAN is used for the *clean targets.
 629 #
 630 # ??? It is possible to merge MULTIDO and MULTICLEAN into one.  They are
 631 # currently kept separate because we don't want the *clean targets to require
 632 # the existence of the compiler (which MULTIDO currently requires) and
 633 # therefore we'd have to record the directory options as well as names
 634 # (currently we just record the names and use --print-multi-lib to get the
 635 # options).
 636
 637 sed -e "s:^TOP[         ]*=[    ]*\([./]*\)[    ]*$:TOP = ${ml_builddotdot}\1:" \
 638     -e "s:^MULTISRCTOP[         ]*=.*$:MULTISRCTOP = ${ml_srcdotdot}:" \
 639     -e "s:^MULTIBUILDTOP[       ]*=.*$:MULTIBUILDTOP = ${ml_builddotdot}:" \
 640     -e "s:^MULTIDIRS[   ]*=.*$:MULTIDIRS = ${multidirs}:" \
 641     -e "s:^MULTISUBDIR[         ]*=.*$:MULTISUBDIR = ${ml_subdir}:" \
 642     -e "s:^MULTIDO[     ]*=.*$:MULTIDO = $ml_do:" \
 643     -e "s:^MULTICLEAN[  ]*=.*$:MULTICLEAN = $ml_clean:" \
 644         ${Makefile} > Makefile.tem
 645 rm -f ${Makefile}
 646 mv Makefile.tem ${Makefile}
 647
 648 # If this is the library's top level, configure each multilib subdir.
 649 # This is done at the end because this is the loop that runs configure
 650 # in each multilib subdir and it seemed reasonable to finish updating the
 651 # Makefile before going on to configure the subdirs.
 652
 653 if [ "${ml_toplevel_p}" = yes ]; then
 654
 655 # We must freshly configure each subdirectory.  This bit of code is
 656 # actually partially stolen from the main configure script.  FIXME.
 657
 658 if [ -n "${multidirs}" ] && [ -z "${ml_norecursion}" ]; then
 659
 660   if [ "${ml_verbose}" = --verbose ]; then
 661     echo "Running configure in multilib subdirs ${multidirs}"
 662     echo "pwd: `pwd`"
 663   fi
 664
 665   ml_origdir=`pwd`
 666   ml_libdir=`echo $ml_origdir | sed -e 's,^.*/,,'`
 667   # cd to top-level-build-dir/${with_target_subdir}
 668   cd ..
 669
 670   for ml_dir in ${multidirs}; do
 671
 672     if [ "${ml_verbose}" = --verbose ]; then
 673       echo "Running configure in multilib subdir ${ml_dir}"
 674       echo "pwd: `pwd`"
 675     fi
 676
 677     if [ -d ${ml_dir} ]; then true; else
 678       # ``mkdir -p ${ml_dir}'' See also mkinstalldirs.
 679       pathcomp=""
 680       for d in `echo ":${ml_dir}" | sed -ne 's/^:\//#/;s/^://;s/\// /g;s/^#/\//;p'`; do
 681         pathcomp="$pathcomp$d"
 682         case "$pathcomp" in
 683           -* ) pathcomp=./$pathcomp ;;
 684         esac
 685         if test ! -d "$pathcomp"; then
 686            echo "mkdir $pathcomp" 1>&2
 687            mkdir "$pathcomp" > /dev/null 2>&1 || lasterr=$?
 688         fi
 689         if test ! -d "$pathcomp"; then
 690            exit $lasterr
 691         fi
 692         pathcomp="$pathcomp/"
 693       done
 694     fi
 695     if [ -d ${ml_dir}/${ml_libdir} ]; then true; else mkdir ${ml_dir}/${ml_libdir}; fi
 696
 697     # Eg: if ${ml_dir} = m68000/m68881, dotdot = ../../
 698     dotdot=../`echo ${ml_dir} | sed -e 's|[^/]||g' -e 's|/|../|g'`
 699
 700     case ${srcdir} in
 701     ".")
 702       echo Building symlink tree in `pwd`/${ml_dir}/${ml_libdir}
 703       if [ "${with_target_subdir}" != "." ]; then
 704         ml_unsubdir="../"
 705       else
 706         ml_unsubdir=""
 707       fi
 708       (cd ${ml_dir}/${ml_libdir};
 709        ../${dotdot}${ml_unsubdir}symlink-tree ../${dotdot}${ml_unsubdir}${ml_libdir} "")
 710       if [ -f ${ml_dir}/${ml_libdir}/Makefile ]; then
 711         if [ x"${MAKE}" = x ]; then
 712           (cd ${ml_dir}/${ml_libdir}; make distclean)
 713         else
 714           (cd ${ml_dir}/${ml_libdir}; ${MAKE} distclean)
 715         fi
 716       fi
 717       ml_newsrcdir="."
 718       ml_srcdiroption=
 719       multisrctop=${dotdot}
 720       ;;
 721     *)
 722       case "${srcdir}" in
 723       /*) # absolute path
 724         ml_newsrcdir=${srcdir}
 725         ;;
 726       *) # otherwise relative
 727         ml_newsrcdir=${dotdot}${srcdir}
 728         ;;
 729       esac
 730       ml_srcdiroption="-srcdir=${ml_newsrcdir}"
 731       multisrctop=
 732       ;;
 733     esac
 734
 735     case "${progname}" in
 736     /*)     ml_recprog=${progname} ;;
 737     *)      ml_recprog=${dotdot}${progname} ;;
 738     esac
 739
 740     # FIXME: POPDIR=${PWD=`pwd`} doesn't work here.
 741     ML_POPDIR=`pwd`
 742     cd ${ml_dir}/${ml_libdir}
 743
 744     if [ -f ${ml_newsrcdir}/configure ]; then
 745       ml_recprog="${ml_newsrcdir}/configure --cache-file=../config.cache"
 746     fi
 747
 748     # find compiler flag corresponding to ${ml_dir}
 749     for i in `${CC-gcc} --print-multi-lib 2>/dev/null`; do
 750       dir=`echo $i | sed -e 's/;.*$//'`
 751       if [ "${dir}" = "${ml_dir}" ]; then
 752         flags=`echo $i | sed -e 's/^[^;]*;//' -e 's/@/ -/g'`
 753         break
 754       fi
 755     done
 756     ml_config_env='CC="${CC_} $flags" CXX="${CXX_} $flags"'
 757
 758     if [ "${with_target_subdir}" = "." ]; then
 759         CC_=$CC
 760         CXX_=$CXX
 761     else
 762         # Create a regular expression that matches any string as long
 763         # as ML_POPDIR.
 764         popdir_rx=`echo ${ML_POPDIR} | sed 's,.,.,g'`
 765         CC_=
 766         for arg in ${CC}; do
 767           case $arg in
 768           -[BIL]"${ML_POPDIR}"/*)
 769             CC_="${CC_} "`echo "X${arg}" | sed -n "s/X\\(-[BIL]${popdir_rx}\\).*/\\1/p"`/${ml_dir}`echo "X${arg}" | sed -n "s/X-[BIL]${popdir_rx}\\(.*\\)/\1/p"` ;;
 770           "${ML_POPDIR}"/*)
 771             CC_="${CC_} "`echo "X${arg}" | sed -n "s/X\\(${popdir_rx}\\).*/\\1/p""`/${ml_dir}`echo "X${arg}" | sed -n "s/X${popdir_rx}\\(.*\\)/\\1/p"` ;;
 772           *)
 773             CC_="${CC_} ${arg}" ;;
 774           esac
 775         done
 776
 777         CXX_=
 778         for arg in ${CXX}; do
 779           case $arg in
 780           -[BIL]"${ML_POPDIR}"/*)
 781             CXX_="${CXX_} "`echo "X${arg}" | sed -n "s/X\\(-[BIL]${popdir_rx}\\).*/\\1/p"`/${ml_dir}`echo "X${arg}" | sed -n "s/X-[BIL]${popdir_rx}\\(.*\\)/\\1/p"` ;;
 782           "${ML_POPDIR}"/*)
 783             CXX_="${CXX_} "`echo "X${arg}" | sed -n "s/X\\(${popdir_rx}\\).*/\\1/p"`/${ml_dir}`echo "X${arg}" | sed -n "s/X${popdir_rx}\\(.*\\)/\\1/p"` ;;
 784           *)
 785             CXX_="${CXX_} ${arg}" ;;
 786           esac
 787         done
 788
 789     fi
 790
 791     if eval ${ml_config_env} ${ml_config_shell} ${ml_recprog} \
 792         --with-multisubdir=${ml_dir} --with-multisrctop=${multisrctop} \
 793         ${ml_arguments} ${ml_srcdiroption} ; then
 794       true
 795     else
 796       exit 1
 797     fi
 798
 799     cd ${ML_POPDIR}
 800
 801   done
 802
 803   cd ${ml_origdir}
 804 fi
 805
 806 fi # ${ml_toplevel_p} = yes
 807 fi # ${enable_multilib} = yes