boehm-gc/configure.ac

   1 # Copyright (c) 1999, 2000, 2001, 2002, 2003, 2006 by Red Hat, Inc. All rights reserved.
   2 # Copyright 2004 Nathanael Nerode
   3 #
   4 # THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
   5 # OR IMPLIED.  ANY USE IS AT YOUR OWN RISK.
   6 #
   7 # Permission is hereby granted to use or copy this program
   8 # for any purpose,  provided the above notices are retained on all copies.
   9 # Permission to modify the code and to distribute modified code is granted,
  10 # provided the above notices are retained, and a notice that the code was
  11 # modified is included with the above copyright notice.
  12 #
  13 # Original author: Tom Tromey
  14 # Modified by Nathanael Nerode
  15
  16 dnl Process this file with autoconf to produce configure.
  17
  18 AC_PREREQ(2.59)
  19 AC_INIT
  20 AC_CONFIG_SRCDIR(gcj_mlc.c)
  21 # This works around the fact that libtool configuration may change LD
  22 # for this particular configuration, but some shells, instead of
  23 # keeping the changes in LD private, export them just because LD is
  24 # exported.
  25 ORIGINAL_LD_FOR_MULTILIBS=$LD
  26
  27 AM_ENABLE_MULTILIB(, ..)
  28
  29 AC_CANONICAL_HOST
  30 AC_CANONICAL_TARGET
  31
  32 # Get the 'noncanonical' system names.
  33 ACX_NONCANONICAL_TARGET
  34
  35 # This works around an automake problem.
  36 mkinstalldirs="`cd $ac_aux_dir && ${PWDCMD-pwd}`/mkinstalldirs"
  37 AC_SUBST(mkinstalldirs)
  38
  39 AM_INIT_AUTOMAKE(gc, 6.6, no-define)
  40
  41 # The autoconf 2.5x version of the no-executables hack.
  42 GCC_NO_EXECUTABLES
  43
  44 # Yak.  We must force CC and CXX to /not/ be precious variables; otherwise
  45 # the wrong, non-multilib-adjusted value will be used in multilibs.
  46 # As a side effect, we have to subst CFLAGS and CXXFLAGS ourselves.
  47
  48 m4_rename([_AC_ARG_VAR_PRECIOUS],[real_PRECIOUS])
  49 m4_define([_AC_ARG_VAR_PRECIOUS],[])
  50 AC_PROG_CC
  51 AC_PROG_CXX
  52 m4_rename([real_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])
  53
  54 AM_PROG_CC_C_O
  55
  56 AC_SUBST(CFLAGS)
  57 AC_SUBST(CXXFLAGS)
  58
  59 # Newer automakes demand CCAS and CCASFLAGS.
  60 : ${CCAS='$(CC)'}
  61 : ${CCASFLAGS='$(CFLAGS)'}
  62 AC_SUBST(CCAS)
  63 AC_SUBST(CCASFLAGS)
  64
  65 AC_CHECK_TOOL(AS, as)
  66 AC_CHECK_TOOL(AR, ar)
  67 AC_CHECK_TOOL(RANLIB, ranlib, :)
  68
  69 AC_PROG_INSTALL
  70
  71 AM_MAINTAINER_MODE
  72
  73 . ${srcdir}/configure.host
  74
  75 case ${gc_basedir} in
  76 /* | [A-Za-z]:[/\\]*) gc_flagbasedir=${gc_basedir} ;;
  77 *) gc_flagbasedir='$(top_builddir)/'${gc_basedir} ;;
  78 esac
  79
  80 gc_cflags="${gc_cflags} -Iinclude -I"'$(top_builddir)'"/./targ-include -I${gc_flagbasedir}/libc/include"
  81 case "${host}" in
  82   *-*-cygwin32*)
  83     gc_cflags="${gc_cflags} -I${gc_flagbasedir}/../winsup/include"
  84     ;;
  85 esac
  86
  87 dnl gc_cflags="${gc_cflags} -fno-builtin"
  88
  89 GC_CFLAGS=${gc_cflags}
  90 AC_SUBST(GC_CFLAGS)
  91
  92 AC_PROG_LIBTOOL
  93
  94 dnl We use these options to decide which functions to include.
  95 AC_ARG_WITH(target-subdir,
  96 [  --with-target-subdir=SUBDIR
  97                           configuring with a cross compiler])
  98 AC_ARG_WITH(cross-host,
  99 [  --with-cross-host=HOST  configuring with a cross compiler])
 100
 101 AC_MSG_CHECKING([for thread model used by GCC])
 102 THREADS=`$CC -v 2>&1 | sed -n 's/^Thread model: //p'`
 103 if test -z "$THREADS"; then
 104    THREADS=no
 105 fi
 106 AC_MSG_RESULT([$THREADS])
 107
 108 AC_ARG_ENABLE(parallel-mark,
 109 [  --enable-parallel-mark       parallelize marking and free list construction],
 110    [case "$THREADS" in
 111       no | none | single)
 112         AC_MSG_ERROR([Parallel mark requires --enable-threads=x spec])
 113         ;;
 114     esac]
 115 )
 116
 117 AM_CPPFLAGS="-I`cd $srcdir && ${PWDCMD-pwd}`/include"
 118 THREADLIBS=
 119 case "$THREADS" in
 120  no | none | single)
 121     THREADS=none
 122     ;;
 123  posix | posix95 | pthreads)
 124     THREADS=posix
 125     THREADLIBS=-lpthread
 126     case "$host" in
 127      x86-*-linux* | ia64-*-linux* | i586-*-linux* | i686-*-linux* | x86_64-*-linux* | alpha-*-linux*)
 128         AC_DEFINE(GC_LINUX_THREADS,1,[support for Xavier Leroy's Linux threads])
 129         AC_DEFINE(_REENTRANT,1,[Use reentrant code])
 130         if test "${enable_parallel_mark}" = yes; then
 131           AC_DEFINE(PARALLEL_MARK,1,[allow the marker to run in multiple threads])
 132         fi
 133         AC_DEFINE(THREAD_LOCAL_ALLOC,1,[define GC_local_malloc() & GC_local_malloc_atomic()])
 134         ;;
 135      *-*-linux*)
 136         AC_DEFINE(GC_LINUX_THREADS,1)
 137         AC_DEFINE(_REENTRANT,1)
 138         ;;
 139      *-*-aix*)
 140         AC_DEFINE(GC_AIX_THREADS,1,[support AIX threads])
 141         AC_DEFINE(_REENTRANT,1)
 142         ;;
 143      *-*-hpux11*)
 144         AC_MSG_WARN("Only HP-UX 11 POSIX threads are supported.")
 145         AC_DEFINE(GC_HPUX_THREADS,1,[enables support for HP/UX 11 pthreads])
 146         AC_DEFINE(_POSIX_C_SOURCE,199506L,[POSIX version of C Source])
 147         if test "${enable_parallel_mark}" = yes; then
 148           AC_DEFINE(PARALLEL_MARK,1)
 149         fi
 150         AC_DEFINE(THREAD_LOCAL_ALLOC,1)
 151         THREADLIBS="-lpthread -lrt"
 152         # HPUX needs REENTRANT for the _r calls.
 153         AC_DEFINE(_REENTRANT, 1, [Required define if using POSIX threads])
 154         ;;
 155      *-*-hpux10*)
 156         AC_MSG_WARN("Only HP-UX 11 POSIX threads are supported.")
 157         ;;
 158       *-*-kfreebsd*-gnu)
 159        AC_DEFINE(GC_FREEBSD_THREADS)
 160        INCLUDES="$INCLUDES -pthread"
 161        THREADDLLIBS=-pthread
 162        AC_DEFINE(_REENTRANT)
 163          if test "${enable_parallel_mark}" = yes; then
 164          AC_DEFINE(PARALLEL_MARK)
 165        fi
 166        AC_DEFINE(THREAD_LOCAL_ALLOC)
 167        AC_DEFINE(USE_COMPILER_TLS, 1,[use tls for boehm])
 168                ;;
 169      *-*-freebsd*)
 170         AC_MSG_WARN("FreeBSD does not yet fully support threads with Boehm GC.")
 171         AC_DEFINE(GC_FREEBSD_THREADS,1,[support FreeBSD threads])
 172         AM_CPPFLAGS="$AM_CPPFLAGS -pthread"
 173         THREADLIBS=-pthread
 174         ;;
 175      *-*-solaris*)
 176         AC_DEFINE(GC_SOLARIS_PTHREADS,1,[support for Solaris pthreads])
 177         # Need to use alternate thread library, otherwise gctest hangs
 178         # on Solaris 8.
 179         multi_os_directory=`$CC -print-multi-os-directory`
 180         THREADLIBS="-L/usr/lib/lwp/$multi_os_directory \
 181                     -R/usr/lib/lwp/$multi_os_directory -lpthread -lthread -lrt"
 182         ;;
 183      *-*-irix*)
 184         AC_DEFINE(GC_IRIX_THREADS,1,[support for Irix pthreads])
 185         ;;
 186      *-*-cygwin*)
 187         AC_DEFINE(GC_WIN32_THREADS,1,[support for win32 threads])
 188         ;;
 189      *-*-darwin*)
 190         AC_DEFINE(GC_DARWIN_THREADS,1,[support for Mac OS X pthreads])
 191         AC_DEFINE(THREAD_LOCAL_ALLOC,1)
 192         if test "${enable_parallel_mark}" = yes; then
 193           AC_DEFINE(PARALLEL_MARK,1)
 194         fi
 195         ;;
 196      *-*-osf*)
 197         AC_DEFINE(GC_OSF1_THREADS,1,[support for Tru64 pthreads])
 198         if test "${enable_parallel_mark}" = yes; then
 199           AC_DEFINE(PARALLEL_MARK,1)
 200           AC_DEFINE(THREAD_LOCAL_ALLOC,1)
 201           # May want to enable it in other cases, too.
 202           # Measurements havent yet been done.
 203         fi
 204         AM_CPPFLAGS="$AM_CPPFLAGS -pthread"
 205         THREADLIBS="-lpthread -lrt"
 206         ;;
 207     esac
 208     ;;
 209  win32)
 210     AC_DEFINE(GC_WIN32_THREADS,1)
 211     dnl Old wine getenv may not return NULL for missing entry.
 212     dnl Define EMPTY_GETENV_RESULTS here to work around the bug.
 213     ;;
 214  dgux386)
 215     THREADS=dgux386
 216 AC_MSG_RESULT($THREADLIBS)
 217     # Use pthread GCC  switch
 218     THREADLIBS=-pthread
 219     if test "${enable_parallel_mark}" = yes; then
 220         AC_DEFINE(PARALLEL_MARK,1)
 221     fi
 222     AC_DEFINE(THREAD_LOCAL_ALLOC,1)
 223     AC_DEFINE(GC_DGUX386_THREADS,1,[support for DB/UX on I386 threads])
 224     AC_DEFINE(DGUX_THREADS,1,[No description])
 225     # Enable _POSIX4A_DRAFT10_SOURCE with flag -pthread
 226     AM_CPPFLAGS="-pthread $AM_CPPFLAGS"
 227     ;;
 228  aix)
 229     THREADS=posix
 230     THREADLIBS=-lpthread
 231     AC_DEFINE(GC_AIX_THREADS,1)
 232     AC_DEFINE(_REENTRANT,1)
 233     ;;
 234  decosf1 | irix | mach | os2 | solaris | dce | vxworks)
 235     AC_MSG_ERROR(thread package $THREADS not yet supported)
 236     ;;
 237  *)
 238     AC_MSG_ERROR($THREADS is an unknown thread package)
 239     ;;
 240 esac
 241 AC_SUBST(THREADLIBS)
 242
 243 case "$host" in
 244    powerpc-*-darwin*)
 245       powerpc_darwin=true
 246       ;;
 247 esac
 248 AM_CONDITIONAL(POWERPC_DARWIN,test x$powerpc_darwin = xtrue)
 249
 250 # Darwin needs a few extra special tests to deal with variation in the
 251 # system headers.
 252 case "$host" in
 253   powerpc*-*-darwin*)
 254     AC_CHECK_MEMBER(ppc_thread_state_t.r0,
 255       AC_DEFINE(HAS_PPC_THREAD_STATE_R0,1,
 256         [ppc_thread_state_t has field r0]),,
 257       [#include <mach/thread_status.h>])
 258     AC_CHECK_MEMBER(ppc_thread_state_t.__r0,
 259       AC_DEFINE(HAS_PPC_THREAD_STATE___R0,1,dnl
 260         [ppc_thread_state_t has field __r0]),,
 261       [#include <mach/thread_status.h>])
 262     AC_CHECK_MEMBER(ppc_thread_state64_t.r0,
 263       AC_DEFINE(HAS_PPC_THREAD_STATE64_R0,1,dnl
 264         [ppc_thread_state64_t has field r0]),,
 265       [#include <mach/thread_status.h>])
 266     AC_CHECK_MEMBER(ppc_thread_state64_t.__r0,
 267       AC_DEFINE(HAS_PPC_THREAD_STATE64___R0,1,dnl
 268         [ppc_thread_state64_t has field __r0]),,
 269       [#include <mach/thread_status.h>])
 270     ;;
 271   i?86*-*-darwin*)
 272     AC_CHECK_MEMBER(x86_thread_state32_t.eax,
 273       AC_DEFINE(HAS_X86_THREAD_STATE32_EAX,1,dnl
 274         [x86_thread_state32_t has field eax]),,
 275       [#include <sys/cdefs.h>
 276       #include <mach/thread_status.h>])
 277     AC_CHECK_MEMBER(x86_thread_state32_t.__eax,
 278       AC_DEFINE(HAS_X86_THREAD_STATE32___EAX,1,dnl
 279         [x86_thread_state32_t has field __eax]),,
 280       [#include <sys/cdefs.h>
 281       #include <mach/thread_status.h>])
 282     ;;
 283   x86_64-*-darwin*)
 284     AC_CHECK_MEMBER(x86_thread_state64_t.rax,
 285       AC_DEFINE(HAS_X86_THREAD_STATE64_RAX,1,dnl
 286         [x86_thread_state64_t has field rax]),,
 287       [#include <sys/cdefs.h>
 288       #include <mach/thread_status.h>])
 289     AC_CHECK_MEMBER(x86_thread_state64_t.__rax,
 290       AC_DEFINE(HAS_X86_THREAD_STATE64___RAX,1,dnl
 291         [x86_thread_state64_t has field __rax]),,
 292       [#include <sys/cdefs.h>
 293       #include <mach/thread_status.h>])
 294      ;;
 295   *) ;;
 296 esac
 297
 298 # We never want libdl on darwin. It is a fake libdl that just ends up making
 299 # dyld calls anyway
 300 case "$host" in
 301   *-*-darwin*) ;;
 302   *)
 303     AC_CHECK_LIB(dl, dlopen, EXTRA_TEST_LIBS="$EXTRA_TEST_LIBS -ldl")
 304     ;;
 305 esac
 306
 307 # extra LD Flags which are required for targets
 308 case "${host}" in
 309   *-*-darwin*)
 310     extra_ldflags_libgc=-Wl,-single_module
 311     ;;
 312 esac
 313 AC_SUBST(extra_ldflags_libgc)
 314
 315 AC_SUBST(EXTRA_TEST_LIBS)
 316
 317 target_all=libgcjgc.la
 318 AC_SUBST(target_all)
 319
 320 dnl If the target is an eCos system, use the appropriate eCos
 321 dnl I/O routines.
 322 dnl FIXME: this should not be a local option but a global target
 323 dnl system; at present there is no eCos target.
 324 TARGET_ECOS="no"
 325 AC_ARG_WITH(ecos,
 326 [  --with-ecos             enable runtime eCos target support],
 327 TARGET_ECOS="$with_ecos"
 328 )
 329
 330 addobjs=
 331 addlibs=
 332 addincludes=
 333 addtests=
 334 case "$TARGET_ECOS" in
 335    no)
 336       ;;
 337    *)
 338       AC_DEFINE(ECOS,1,[Target is ECOS])
 339       AM_CPPFLAGS="${AM_CPPFLAGS} -I${TARGET_ECOS}/include"
 340       addobjs="$addobjs ecos.lo"
 341       ;;
 342 esac
 343
 344 if test "${enable_cplusplus}" = yes; then
 345       addincludes="$addincludes include/gc_cpp.h include/gc_allocator.h"
 346       addtests="$addtests test_cpp"
 347 fi
 348
 349 AM_CONDITIONAL(CPLUSPLUS, test "${enable_cplusplus}" = yes)
 350
 351 AC_SUBST(CXX)
 352
 353 AC_SUBST(AM_CPPFLAGS)
 354
 355 # Configuration of shared libraries
 356 #
 357 AC_MSG_CHECKING(whether to build shared libraries)
 358 AC_ENABLE_SHARED
 359
 360 case "$host" in
 361  alpha-*-openbsd*)
 362      enable_shared=no
 363      AC_MSG_RESULT(no)
 364      ;;
 365  *)
 366      AC_MSG_RESULT(yes)
 367      ;;
 368 esac
 369
 370 # Checks for pthreads functions
 371 #
 372 oldLIBS="$LIBS"
 373 LIBS="$LIBS $THREADLIBS"
 374 AC_CHECK_FUNCS([pthread_getattr_np])
 375 LIBS="$oldLIBS"
 376
 377 # Configuration of machine-dependent code
 378 #
 379 # Set NO_EXECUTE_PERMISSION by default because gcj already uses
 380 # ffi_closure_{alloc,free} which takes care of allocating trampolines
 381 # in executable memory.
 382 #
 383 AC_MSG_CHECKING(which machine-dependent code should be used)
 384 machdep=
 385 case "$host" in
 386  alpha*-*-openbsd*)
 387     machdep="alpha_mach_dep.lo"
 388     if test x"${ac_cv_lib_dl_dlopen}" != xyes ; then
 389        AC_MSG_WARN(OpenBSD/Alpha without dlopen(). Shared library support is disabled)
 390     fi
 391     ;;
 392  alpha*-*-linux*)
 393     machdep="alpha_mach_dep.lo"
 394     ;;
 395  i?86-*-solaris2.[[89]] | i?86-*-solaris2.1?)
 396     AC_DEFINE(SOLARIS25_PROC_VDB_BUG_FIXED,1,[PROC_VDB in Solaris 2.5 gives wrong values for dirty bits])
 397     ;;
 398  mipstx39-*-elf*)
 399     machdep="mips_ultrix_mach_dep.lo"
 400     AC_DEFINE(STACKBASE, __stackbase,[No description])
 401     AC_DEFINE(DATASTART_IS_ETEXT,1,[No description])
 402     ;;
 403  mips-dec-ultrix*)
 404     machdep="mips_ultrix_mach-dep.lo"
 405     ;;
 406  mips-nec-sysv*|mips-unknown-sysv*)
 407     ;;
 408  mips*-*-linux*)
 409     ;;
 410  mips-*-*)
 411     machdep="mips_sgi_mach_dep.lo"
 412     ;;
 413  sparc-*-netbsd*)
 414     machdep="sparc_netbsd_mach_dep.lo"
 415     ;;
 416  sparc-sun-solaris2.3)
 417     machdep="sparc_mach_dep.lo"
 418     AC_DEFINE(SUNOS53_SHARED_LIB,1,[Avoid Solaris 5.3 dynamic library bug])
 419     ;;
 420  sparc*-sun-solaris2.*)
 421     machdep="sparc_mach_dep.lo"
 422     ;;
 423  ia64-*-*)
 424     machdep="mach_dep.lo ia64_save_regs_in_stack.lo"
 425     ;;
 426 esac
 427 AC_DEFINE(NO_EXECUTE_PERMISSION,1,[cause some or all of the heap to not have execute permission])
 428 if test x"$machdep" = x; then
 429 AC_MSG_RESULT($machdep)
 430    machdep="mach_dep.lo"
 431 fi
 432 addobjs="$addobjs $machdep"
 433 AC_SUBST(addobjs)
 434 AC_SUBST(addincludes)
 435 AC_SUBST(addlibs)
 436 AC_SUBST(addtests)
 437
 438 #
 439 # Check for AViiON Machines running DGUX
 440 #
 441 AC_MSG_CHECKING(if host is AViiON running DGUX)
 442 ac_is_dgux=no
 443 AC_CHECK_HEADER(sys/dg_sys_info.h,
 444 [ac_is_dgux=yes;])
 445
 446 AC_MSG_RESULT($ac_is_dgux)
 447     ## :GOTCHA: we do not check anything but sys/dg_sys_info.h
 448 if test $ac_is_dgux = yes; then
 449     if test "$enable_full_debug" = "yes"; then
 450       CFLAGS="-g -mstandard -DDGUX -D_DGUX_SOURCE -Di386 -mno-legend -O2"
 451       CXXFLAGS="-g -mstandard -DDGUX -D_DGUX_SOURCE -Di386 -mno-legend -O2"
 452     else
 453       CFLAGS="-DDGUX -D_DGUX_SOURCE -Di386 -mno-legend -O2"
 454       CXXFLAGS="-DDGUX -D_DGUX_SOURCE -Di386 -mno-legend -O2"
 455     fi
 456     AC_SUBST(CFLAGS)
 457     AC_SUBST(CXXFLAGS)
 458 fi
 459
 460 dnl As of 4.13a2, the collector will not properly work on Solaris when
 461 dnl built with gcc and -O.  So we remove -O in the appropriate case.
 462 dnl Not needed anymore on Solaris.
 463 AC_MSG_CHECKING(whether Solaris gcc optimization fix is necessary)
 464 case "$host" in
 465  *aix*)
 466     if test "$GCC" = yes; then
 467        AC_MSG_RESULT(yes)
 468        new_CFLAGS=
 469        for i in $CFLAGS; do
 470           case "$i" in
 471            -O*)
 472               ;;
 473            *)
 474               new_CFLAGS="$new_CFLAGS $i"
 475               ;;
 476           esac
 477        done
 478        CFLAGS="$new_CFLAGS"
 479     else
 480        AC_MSG_RESULT(no)
 481     fi
 482     ;;
 483  *) AC_MSG_RESULT(no) ;;
 484 esac
 485
 486 dnl We need to override the top-level CFLAGS.  This is how we do it.
 487 MY_CFLAGS="$CFLAGS"
 488 AC_SUBST(MY_CFLAGS)
 489
 490 dnl Include defines that have become de facto standard.
 491 dnl ALL_INTERIOR_POINTERS can be overridden in startup code.
 492 AC_DEFINE(SILENT,1,[disables statistics printing])
 493 AC_DEFINE(NO_SIGNALS,1,[does not disable signals])
 494 AC_DEFINE(ALL_INTERIOR_POINTERS,1,[allows all pointers to the interior of objects to be recognized])
 495
 496 dnl By default, make the library as general as possible.
 497 AC_DEFINE(JAVA_FINALIZATION,1,[make it somewhat safer to finalize objects out of order])
 498 AC_DEFINE(GC_GCJ_SUPPORT,1,[include support for gcj])
 499 AC_DEFINE(ATOMIC_UNCOLLECTABLE,1,[include code for GC_malloc_atomic_uncollectable])
 500
 501 AC_ARG_ENABLE(gc-debug,
 502 [  --enable-gc-debug    include full support for pointer backtracing etc.],
 503 [ if test "$enable_gc_debug" = "yes"; then
 504     AC_MSG_WARN("Must define GC_DEBUG and use debug alloc. in clients.")
 505     AC_DEFINE(KEEP_BACK_PTRS,1,[Add code to save back pointers])
 506     AC_DEFINE(DBG_HDRS_ALL,1,[Make sure that all objects have debug headers])
 507     case $host in
 508       ia64-*-linux* )
 509         AC_DEFINE(MAKE_BACK_GRAPH,1,[Enable GC_PRINT_BACK_HEIGHT environment variable])
 510       ;;
 511       x86-*-linux* | i586-*-linux* | i686-*-linux* | x86_64-*-linux* )
 512         AC_DEFINE(MAKE_BACK_GRAPH,1)
 513         AC_MSG_WARN("Client must not use -fomit-frame-pointer.")
 514         AC_DEFINE(SAVE_CALL_COUNT, 8, [number of call frames saved with objects allocated through the debugging interface])
 515       ;;
 516       i[3456]86-*-dgux*)
 517         AC_DEFINE(MAKE_BACK_GRAPH,1)
 518       ;;
 519     esac
 520   fi])
 521
 522 if test "${gc_use_mmap}" = "yes"; then
 523   AC_DEFINE(USE_MMAP, 1, [use MMAP instead of sbrk to get new memory])
 524 fi
 525
 526 if test -n "$with_cross_host" &&
 527    test x"$with_cross_host" != x"no"; then
 528   toolexecdir='$(exec_prefix)/$(target_noncanonical)'
 529   toolexeclibdir='$(toolexecdir)/lib'
 530 else
 531   toolexecdir='$(libdir)/gcc-lib/$(target_noncanonical)'
 532   toolexeclibdir='$(libdir)'
 533 fi
 534 multi_os_directory=`$CC -print-multi-os-directory`
 535 case $multi_os_directory in
 536   .) ;; # Avoid trailing /.
 537   *) toolexeclibdir=$toolexeclibdir/$multi_os_directory ;;
 538 esac
 539 AC_SUBST(toolexecdir)
 540 AC_SUBST(toolexeclibdir)
 541
 542 if test "${multilib}" = "yes"; then
 543   multilib_arg="--enable-multilib"
 544 else
 545   multilib_arg=
 546 fi
 547
 548 AC_CONFIG_HEADERS([include/gc_config.h include/gc_ext_config.h])
 549
 550 AC_CONFIG_FILES(Makefile include/Makefile threads.mk)
 551 AC_OUTPUT