configure.in

   1 AC_INIT(README)
   2 AC_CANONICAL_SYSTEM
   3
   4 # Gross hack to enable 'make dist' on automake 1.9+tar 1.14.
   5 # The extra brackets are to foil regex-based scans.
   6 m4_ifdef([_A][M_PROG_TAR],[_A][M_SET_OPTION([tar-ustar])])
   7
   8 AM_CONFIG_HEADER(config.h)
   9 AM_INIT_AUTOMAKE(mono,1.2.5)
  10 AM_MAINTAINER_MODE
  11
  12 API_VER=1.0
  13 AC_SUBST(API_VER)
  14
  15 AC_PROG_LN_S
  16
  17 # In case of cygwin, override LN_S, irrespective of what it determines.
  18 # The build uses cygwin, but the actual runtime doesn't.
  19 case $host_os in
  20 *cygwin* ) LN_S='cp -p';;
  21 esac
  22
  23
  24 dnl
  25 dnl libgc checks
  26 dnl
  27
  28 gc_headers=no
  29 gc=included
  30 use_included_gc=no
  31 libgc_configure_args=
  32
  33 if test -d $srcdir/libgc ; then
  34   gc_default=included
  35 else
  36   gc_default=boehm
  37 fi
  38
  39 #
  40 # These are the flags that need to be stored in the mono.pc file for
  41 # compiling code that will embed Mono
  42 #
  43 libmono_cflags=""
  44 libmono_ldflags=""
  45 AC_SUBST(libmono_cflags)
  46 AC_SUBST(libmono_ldflags)
  47 export_ldflags=`(./libtool --config; echo eval echo \\$export_dynamic_flag_spec) | sh`
  48 AC_SUBST(export_ldflags)
  49
  50 # Variable to have relocatable .pc files (lib, or lib64)
  51 reloc_libdir=`basename ${libdir}`
  52 AC_SUBST(reloc_libdir)
  53
  54 dnl if linker handles the version script
  55 no_version_script=no
  56
  57 # Set to yes if Unix sockets cannot be created in an anonymous namespace
  58 need_link_unlink=no
  59
  60 # Thread configuration inspired by sleepycat's db
  61 AC_MSG_CHECKING([host platform characteristics])
  62 libgc_threads=no
  63 case "$host" in
  64         *-*-mingw*|*-*-cygwin*)
  65                 platform_win32=yes
  66                 AC_DEFINE(PLATFORM_WIN32,1,[Platform is Win32])
  67                 if test "x$cross_compiling" = "xno"; then
  68                         CC="gcc -mno-cygwin -g"
  69                         # So libgc configure gets -mno-cygwin
  70                         export CC
  71                 fi
  72                 HOST_CC="gcc"
  73                 CPPFLAGS="$CPPFLAGS -DWIN32_THREADS -DFD_SETSIZE=1024 -DUNICODE -D_UNICODE"
  74                 libmono_cflags="-mno-cygwin"
  75                 libmono_ldflags="-mno-cygwin"
  76                 libdl=
  77                 libgc_threads=win32
  78                 gc_default=included
  79                 with_sigaltstack=no
  80                 LN_S=cp
  81                 # This forces libgc to use the DllMain based thread registration code on win32
  82                 libgc_configure_args="$libgc_configure_args --enable-win32-dllmain=yes"
  83                 ;;
  84         *-*-*netbsd*)
  85                 platform_win32=no
  86                 CPPFLAGS="$CPPFLAGS -D_REENTRANT -DGC_NETBSD_THREADS -D_GNU_SOURCE"
  87                 libmono_cflags="-D_REENTRANT"
  88                 LDFLAGS="$LDFLAGS -pthread"
  89                 CPPFLAGS="$CPPFLAGS -DPLATFORM_BSD"
  90                 libmono_ldflags="-pthread"
  91                 need_link_unlink=yes
  92                 libdl="-ldl"
  93                 libgc_threads=pthreads
  94                 with_sigaltstack=no
  95                 ;;
  96 # these flags will work for all versions of -STABLE
  97 #
  98         *-*-*freebsd4*)
  99                 platform_win32=no
 100                 if test "x$PTHREAD_CFLAGS" = "x"; then
 101                         CPPFLAGS="$CPPFLAGS -D_THREAD_SAFE -DGC_FREEBSD_THREADS"
 102                         libmono_cflags="-D_THREAD_SAFE"
 103                 else
 104                         CPPFLAGS="$CPPFLAGS $PTHREAD_CFLAGS -DGC_FREEBSD_THREADS"
 105                         libmono_cflags="$PTHREAD_CFLAGS"
 106                 fi
 107                 if test "x$PTHREAD_LIBS" = "x"; then
 108                         LDFLAGS="$LDFLAGS -pthread"
 109                         libmono_ldflags="-pthread"
 110                 else
 111                         LDFLAGS="$LDFLAGS $PTHREAD_LIBS"
 112                         libmono_ldflags="$PTHREAD_LIBS"
 113                 fi
 114                 CPPFLAGS="$CPPFLAGS -DPLATFORM_BSD -DPLATFORM_BSD4"
 115                 need_link_unlink=yes
 116                 AC_DEFINE(PTHREAD_POINTER_ID)
 117                 libdl=
 118                 libgc_threads=pthreads
 119 # TLS isn't implemented at all on 4-STABLE
 120                 with_tls=pthread
 121                 ;;
 122         *-*-*freebsd5*)
 123                 platform_win32=no
 124                 if test "x$PTHREAD_CFLAGS" = "x"; then
 125                         CPPFLAGS="$CPPFLAGS -DGC_FREEBSD_THREADS"
 126                         libmono_cflags=
 127                 else
 128                         CPPFLAGS="$CPPFLAGS $PTHREAD_CFLAGS -DGC_FREEBSD_THREADS"
 129                         libmono_cflags="$PTHREAD_CFLAGS"
 130                 fi
 131                 if test "x$PTHREAD_LIBS" = "x"; then
 132                         LDFLAGS="$LDFLAGS -pthread"
 133                         libmono_ldflags="-pthread"
 134                 else
 135                         LDFLAGS="$LDFLAGS $PTHREAD_LIBS"
 136                         libmono_ldflags="$PTHREAD_LIBS"
 137                 fi
 138                 CPPFLAGS="$CPPFLAGS -DPLATFORM_BSD -DPLATFORM_BSD5"
 139                 need_link_unlink=yes
 140                 AC_DEFINE(PTHREAD_POINTER_ID)
 141                 libdl=
 142                 with_sigaltstack=yes
 143                 libgc_threads=pthreads
 144 # TLS is only partially implemented on 5-STABLE (compiler support
 145 # but NOT library support)
 146 #
 147                 with_tls=pthread
 148                 ;;
 149         *-*-*freebsd6*)
 150                 platform_win32=no
 151                 if test "x$PTHREAD_CFLAGS" = "x"; then
 152                         CPPFLAGS="$CPPFLAGS -DGC_FREEBSD_THREADS"
 153                         libmono_cflags=
 154                 else
 155                         CPPFLAGS="$CPPFLAGS $PTHREAD_CFLAGS -DGC_FREEBSD_THREADS"
 156                         libmono_cflags="$PTHREAD_CFLAGS"
 157                 fi
 158                 if test "x$PTHREAD_LIBS" = "x"; then
 159                         LDFLAGS="$LDFLAGS -pthread"
 160                         libmono_ldflags="-pthread"
 161                 else
 162                         LDFLAGS="$LDFLAGS $PTHREAD_LIBS"
 163                         libmono_ldflags="$PTHREAD_LIBS"
 164                 fi
 165                 CPPFLAGS="$CPPFLAGS -DPLATFORM_BSD -DPLATFORM_BSD6"
 166                 need_link_unlink=yes
 167                 AC_DEFINE(PTHREAD_POINTER_ID)
 168                 libdl=
 169                 libgc_threads=pthreads
 170                 with_sigaltstack=yes
 171 # TLS is only partially implemented on -CURRENT (compiler support
 172 # but NOT library support)
 173 #
 174                 with_tls=pthread
 175                 ;;
 176         *-*-*openbsd*)
 177                 platform_win32=no
 178                 CPPFLAGS="$CPPFLAGS -D_THREAD_SAFE -DGC_FREEBSD_THREADS"
 179                 libmono_cflags="-D_THREAD_SAFE"
 180                 LDFLAGS="$LDFLAGS -pthread"
 181                 libmono_ldflags="-pthread"
 182                 need_link_unlink=yes
 183                 AC_DEFINE(PTHREAD_POINTER_ID)
 184                 libdl=
 185                 libgc_threads=pthreads
 186                 ;;
 187         *-*-linux*)
 188                 platform_win32=no
 189                 CPPFLAGS="$CPPFLAGS -DGC_LINUX_THREADS -D_GNU_SOURCE -D_REENTRANT -DUSE_MMAP -DUSE_MUNMAP"
 190                 libmono_cflags="-D_REENTRANT"
 191                 libmono_ldflags="-lpthread"
 192                 libdl="-ldl"
 193                 libgc_threads=pthreads
 194                 ;;
 195         *-*-hpux*)
 196         platform_win32=no
 197                 CPPFLAGS="$CPPFLAGS -DGC_HPUX_THREADS -D_HPUX_SOURCE -D_XOPEN_SOURCE_EXTENDED -D_REENTRANT"
 198                 # +ESdbgasm only valid on bundled cc on RISC
 199                 # silently ignored for ia64
 200                 if test $GCC != "yes"; then
 201                         CFLAGS="$CFLAGS +ESdbgasm"
 202                         # Arrange for run-time dereferencing of null
 203                         # pointers to produce a SIGSEGV signal.
 204                         LDFLAGS="$LDFLAGS -z"
 205                 fi
 206                 CFLAGS="$CFLAGS +ESdbgasm"
 207                 LDFLAGS="$LDFLAGS -z"
 208                 libmono_cflags="-D_REENTRANT"
 209                 libmono_ldflags="-lpthread"
 210                 libgc_threads=pthreads
 211                 need_link_unlink=yes
 212                 ;;
 213         *-*-solaris*)
 214                 platform_win32=no
 215                 CPPFLAGS="$CPPFLAGS -DGC_SOLARIS_THREADS -DGC_SOLARIS_PTHREADS -D_REENTRANT -D_POSIX_PTHREAD_SEMANTICS -DUSE_MMAP -DUSE_MUNMAP"
 216                 need_link_unlink=yes
 217                 libmono_cflags="-D_REENTRANT"
 218                 libgc_threads=pthreads
 219                 # This doesn't seem to work on solaris/x86, but the configure test runs
 220                 with_tls=pthread
 221                 ;;
 222         *-*-darwin*)
 223                 platform_win32=no
 224                 CPPFLAGS="$CPPFLAGS -no-cpp-precomp -D_THREAD_SAFE -DGC_MACOSX_THREADS -DPLATFORM_MACOSX -DUSE_MMAP -DUSE_MUNMAP"
 225                 CPPFLAGS="$CPPFLAGS -DGetCurrentProcess=MonoGetCurrentProcess -DGetCurrentThread=MonoGetCurrentThread -DCreateEvent=MonoCreateEvent"
 226                 libmono_cflags="-D_THREAD_SAFE"
 227                 LDFLAGS="$LDFLAGS -pthread"
 228                 libmono_ldflags="-pthread"
 229                 need_link_unlink=yes
 230                 AC_DEFINE(PTHREAD_POINTER_ID)
 231                 AC_DEFINE(USE_MACH_SEMA)
 232                 no_version_script=yes
 233                 libdl=
 234                 libgc_threads=pthreads
 235                 ;;
 236         *)
 237                 AC_MSG_WARN([*** Please add $host to configure.in checks!])
 238                 platform_win32=no
 239                 libdl="-ldl"
 240                 ;;
 241 esac
 242 AC_MSG_RESULT(ok)
 243
 244 if test x$need_link_unlink = xyes; then
 245    AC_DEFINE(NEED_LINK_UNLINK, 1, [Define if Unix sockets cannot be created in an anonymous namespace])
 246 fi
 247
 248 AM_CONDITIONAL(PLATFORM_WIN32, test x$platform_win32 = xyes)
 249
 250 AC_CHECK_TOOL(CC, gcc, gcc)
 251 AC_PROG_CC
 252 AM_PROG_AS
 253 AM_PROG_CC_STDC
 254 AC_PROG_INSTALL
 255 AC_PROG_AWK
 256 dnl We should use AM_PROG_AS, but it's not available on automake/aclocal 1.4
 257 : ${CCAS='$(CC)'}
 258 # Set ASFLAGS if not already set.
 259 : ${CCASFLAGS='$(CFLAGS)'}
 260 AC_SUBST(CCAS)
 261 AC_SUBST(CCASFLAGS)
 262
 263 AC_CHECK_PROG(BISON, bison,yes,no)
 264 if test "x$BISON" = "xno";
 265 then
 266         AC_MSG_ERROR([You need to install bison])
 267 fi
 268
 269 dnl may require a specific autoconf version
 270 dnl AC_PROG_CC_FOR_BUILD
 271 dnl CC_FOR_BUILD not automatically detected
 272 CC_FOR_BUILD=$CC
 273 CFLAGS_FOR_BUILD=$CFLAGS
 274 BUILD_EXEEXT=
 275 if test "x$cross_compiling" = "xyes"; then
 276         CC_FOR_BUILD=cc
 277         CFLAGS_FOR_BUILD=
 278         BUILD_EXEEXT=""
 279 fi
 280 AC_SUBST(CC_FOR_BUILD)
 281 AC_SUBST(CFLAGS_FOR_BUILD)
 282 AC_SUBST(HOST_CC)
 283 AC_SUBST(BUILD_EXEEXT)
 284
 285 AM_CONDITIONAL(CROSS_COMPILING, [test x$cross_compiling = xyes])
 286
 287 # Set STDC_HEADERS
 288 AC_HEADER_STDC
 289 AC_LIBTOOL_WIN32_DLL
 290 # This causes monodis to not link correctly
 291 #AC_DISABLE_FAST_INSTALL
 292 AM_PROG_LIBTOOL
 293
 294 # Test whenever ld supports -version-script
 295 AC_PROG_LD
 296 AC_PROG_LD_GNU
 297 if test "x$lt_cv_prog_gnu_ld" = "xno"; then
 298    no_version_script=yes
 299 fi
 300
 301 AM_CONDITIONAL(NO_VERSION_SCRIPT, test x$no_version_script = xyes)
 302
 303 AC_CHECK_HEADERS(sys/filio.h sys/sockio.h netdb.h utime.h semaphore.h sys/un.h linux/rtc.h sys/syscall.h)
 304
 305 AC_CHECK_HEADER(zlib.h, [have_zlib=yes], [have_zlib=no])
 306 if test x$have_zlib = xyes; then
 307    AC_TRY_COMPILE([#include <zlib.h>], [
 308    void main () {
 309    #if defined(ZLIB_VERNUM) && (ZLIB_VERNUM >= 0x1230)
 310    }
 311    #else
 312    #error No good zlib found
 313    #endif
 314    ],[
 315         AC_MSG_RESULT(Using system zlib)
 316         zlib_msg="system zlib"
 317    ],[
 318         AC_MSG_RESULT(Using embedded zlib)
 319         have_zlib=no
 320         zlib_msg="bundled zlib"
 321    ])
 322 fi
 323
 324 AM_CONDITIONAL(HAVE_ZLIB, test x$have_zlib = xyes)
 325 AC_DEFINE(HAVE_ZLIB,1,[Have system zlib])
 326
 327 # for mono/metadata/debug-symfile.c
 328 AC_CHECK_HEADERS(elf.h)
 329
 330 # for support
 331 AC_CHECK_HEADERS(poll.h)
 332 AC_CHECK_HEADERS(sys/poll.h)
 333 AC_CHECK_HEADERS(sys/wait.h)
 334 AC_CHECK_HEADERS(grp.h)
 335 AC_CHECK_HEADERS(syslog.h)
 336
 337 # for mono/dis
 338 AC_CHECK_HEADERS(wchar.h)
 339 case "$host" in
 340         *-*-*freebsd6*)
 341                 AC_CHECK_HEADERS(ieeefp.h)
 342         ;;
 343         *-*-*freebsd*)
 344                 /* Only freebsd6 has a working ieeefp.h */
 345         ;;
 346         *)
 347                 AC_CHECK_HEADERS(ieeefp.h)
 348         ;;
 349 esac
 350 AC_MSG_CHECKING(for isinf)
 351 AC_TRY_LINK([#include <math.h>], [
 352         int f = isinf (1);
 353 ], [
 354         AC_MSG_RESULT(yes)
 355         AC_DEFINE(HAVE_ISINF, 1, [isinf available])
 356 ], [
 357         # We'll have to use signals
 358         AC_MSG_RESULT(no)
 359 ])
 360
 361
 362 # not 64 bit clean in cross-compile
 363 AC_CHECK_SIZEOF(void *, 4)
 364
 365 WARN=''
 366 if test x"$GCC" = xyes; then
 367         WARN='-Wall -Wunused -Wmissing-prototypes -Wmissing-declarations -Wstrict-prototypes  -Wmissing-prototypes -Wnested-externs -Wpointer-arith -Wno-cast-qual -Wcast-align -Wwrite-strings'
 368                 # The runtime code does not respect ANSI C strict aliasing rules
 369                 CFLAGS="$CFLAGS -fno-strict-aliasing"
 370
 371                 ORIG_CFLAGS=$CFLAGS
 372                 CFLAGS="$CFLAGS -Wdeclaration-after-statement"
 373                 AC_MSG_CHECKING(for -Wdeclaration-after-statement option to gcc)
 374                 AC_TRY_COMPILE([], [
 375                                                    void main () { }
 376                 ], [
 377                    AC_MSG_RESULT(yes)
 378                 ], [
 379                    AC_MSG_RESULT(no)
 380                    CFLAGS=$ORIG_CFLAGS
 381                 ])
 382 else
 383         # The Sun Forte compiler complains about inline functions that access static variables
 384         # so disable all inlining.
 385         case "$host" in
 386         *-*-solaris*)
 387                 CFLAGS="$CFLAGS -Dinline="
 388                 ;;
 389         esac
 390 fi
 391 CFLAGS="$CFLAGS -g $WARN"
 392
 393 # Where's the 'mcs' source tree?
 394 if test -d $srcdir/mcs; then
 395   mcsdir=mcs
 396 else
 397   mcsdir=../mcs
 398 fi
 399
 400 mcs_topdir='$(top_srcdir)/'$mcsdir
 401 mcs_topdir_from_srcdir='$(top_builddir)/'$mcsdir
 402
 403 ## Maybe should also disable if mcsdir is invalid.  Let's punt the issue for now.
 404 AM_CONDITIONAL(BUILD_MCS, [test x$cross_compiling = xno && test x$enable_mcs_build != xno])
 405
 406 AC_SUBST([mcs_topdir])
 407 AC_SUBST([mcs_topdir_from_srcdir])
 408
 409 AC_ARG_WITH([libgdiplus],
 410         [  --with-libgdiplus=installed|sibling|<path>   Override the libgdiplus used for System.Drawing tests (defaults to NO)],
 411         [], [with_libgdiplus=installed])
 412
 413 case $with_libgdiplus in
 414 no|installed) libgdiplus_loc= ;;
 415 yes|sibling) libgdiplus_loc=`cd ../libgdiplus && pwd`/src/libgdiplus.la ;;
 416 /*) libgdiplus_loc=$with_libgdiplus ;;
 417 *) libgdiplus_loc=`pwd`/$with_libgdiplus ;;
 418 esac
 419 AC_SUBST([libgdiplus_loc])
 420
 421 AC_PATH_PROG(PKG_CONFIG, pkg-config, no)
 422 if test "x$PKG_CONFIG" = "xno"; then
 423         AC_MSG_ERROR([You need to install pkg-config])
 424 fi
 425
 426 pkg_config_path=
 427 AC_ARG_WITH(crosspkgdir, [  --with-crosspkgdir=/path/to/pkg-config/dir],
 428         if test x$with_crosspkgdir = "x"; then
 429                 if test -s $PKG_CONFIG_PATH; then
 430                         pkg_config_path=$PKG_CONFIG_PATH
 431                 fi
 432         else
 433                 pkg_config_path=$with_crosspkgdir
 434                 PKG_CONFIG_PATH=$pkg_config_path
 435                 export PKG_CONFIG_PATH
 436         fi
 437 )
 438
 439 AC_ARG_WITH([glib],
 440         [  --with-glib=embedded|system       Choose glib API: system or embedded (default to system)],
 441         [], [with_glib=system])
 442
 443 case $with_glib in
 444 embedded)
 445   GLIB_CFLAGS='-I$(top_srcdir)/eglib/src'
 446   GLIB_LIBS='-L$(top_builddir)/eglib/src -leglib -lm'
 447   BUILD_GLIB_CFLAGS="$GLIB_CFLAGS"
 448   BUILD_GLIB_LIBS="$GLIB_LIBS"
 449   AC_CONFIG_SUBDIRS(eglib)
 450   ;;
 451 system)
 452   BUILD_GLIB_CFLAGS=`$PKG_CONFIG --cflags glib-2.0 gthread-2.0`
 453   BUILD_GLIB_LIBS=`$PKG_CONFIG --libs glib-2.0 gthread-2.0`
 454
 455   ## Versions of dependencies
 456   GLIB_REQUIRED_VERSION=1.3.11
 457
 458   PKG_CHECK_MODULES(BASE_DEPENDENCIES, glib-2.0 >= $GLIB_REQUIRED_VERSION)
 459
 460   GLIB_CFLAGS=`$PKG_CONFIG --cflags glib-2.0 gthread-2.0`
 461   GLIB_LIBS=`$PKG_CONFIG --libs glib-2.0 gthread-2.0`
 462   GMODULE_CFLAGS=`$PKG_CONFIG --cflags gmodule-2.0`
 463   GMODULE_LIBS=`$PKG_CONFIG --libs gmodule-2.0`
 464   ;;
 465 *)
 466   AC_MSG_ERROR([Invalid argument to --with-glib.])
 467 esac
 468 AM_CONDITIONAL(EGLIB_BUILD, test x$with_glib = xembedded)
 469
 470 AC_SUBST(GLIB_CFLAGS)
 471 AC_SUBST(GLIB_LIBS)
 472 AC_SUBST(GMODULE_CFLAGS)
 473 AC_SUBST(GMODULE_LIBS)
 474 AC_SUBST(BUILD_GLIB_CFLAGS)
 475 AC_SUBST(BUILD_GLIB_LIBS)
 476
 477 if test x$cross_compiling$platform_win32 = xnoyes; then
 478    AC_MSG_CHECKING(for cygwin glib2-dev package)
 479    if [ cygcheck --f /usr/lib/libglib-2.0.dll.a | grep -q glib2-devel ]; then
 480       AC_MSG_RESULT(found)
 481           AC_MSG_ERROR([Mono cannot be built with the cygwin glib2-devel package installed, because that package doesn't work with -mno-cygwin. Please uninstall it then re-run configure.])
 482    else
 483       AC_MSG_RESULT(not found, ok)
 484    fi
 485
 486    AC_MSG_CHECKING(for broken gwin32.h)
 487    glib_include=`$PKG_CONFIG --cflags-only-I glib-2.0 | sed -e 's/ -I.*//g' | sed -e 's/-I//g'`
 488    if test -f $glib_include/glib/gwin32.h; then
 489           if [ grep ftruncate $glib_include/glib/gwin32.h | grep -q define ]; then
 490                  AC_MSG_RESULT(failed)
 491                  hashmark='#'
 492                  AC_MSG_ERROR([Your version of gwin32.h is broken and will cause compilation errors when building mono. Please fix it by deleting the line: '$hashmark   define ftruncate...' from '$glib_include/glib/gwin32.h' then re-run configure.])
 493           fi
 494    fi
 495    AC_MSG_RESULT(ok)
 496 fi
 497
 498 AC_ARG_WITH(gc, [  --with-gc=boehm,included,none],[gc=$with_gc],[gc=$gc_default])
 499
 500 # Enable support for fast thread-local storage
 501 # Some systems have broken support, so we allow to disable it.
 502 AC_ARG_WITH(tls, [  --with-tls=__thread,pthread       select Thread Local Storage implementation],[],[with_tls=__thread])
 503
 504 # Enable support for using sigaltstack for SIGSEGV and stack overflow handling
 505 # This does not work on some platforms (bug #55253)
 506 AC_ARG_WITH(sigaltstack, [  --with-sigaltstack=yes,no      enable/disable support for sigaltstack],[],[with_sigaltstack=yes])
 507
 508 AC_ARG_WITH(static_mono, [  --with-static_mono=yes,no      link mono statically to libmono (faster)],[],[with_static_mono=yes])
 509
 510 if test "x$enable_static" = "xno"; then
 511    with_static_mono=no
 512 fi
 513
 514 if test "x$platform_win32" = "xyes"; then
 515    # Boehm GC requires the runtime to be in its own dll
 516    with_static_mono=no
 517 fi
 518
 519 AM_CONDITIONAL(STATIC_MONO, test x$with_static_mono != xno)
 520 AC_ARG_ENABLE(mcs-build, [  --disable-mcs-build disable the build of the mcs directory], try_mcs_build=$enableval, enable_mcs_build=yes)
 521
 522 AC_ARG_WITH(xen_opt,   [  --with-xen_opt=yes,no      Enable Xen-specific behaviour],[],[with_xen_opt=yes])
 523 if test "x$with_xen_opt" = "xyes"; then
 524         AC_DEFINE(MONO_XEN_OPT, 1, [Xen-specific behaviour])
 525         ORIG_CFLAGS=$CFLAGS
 526         CFLAGS="$CFLAGS -mno-tls-direct-seg-refs"
 527         AC_MSG_CHECKING(for -mno-tls-direct-seg-refs option to gcc)
 528         AC_TRY_COMPILE([], [
 529                                            void main () { }
 530         ], [
 531            AC_MSG_RESULT(yes)
 532         ], [
 533            AC_MSG_RESULT(no)
 534            CFLAGS=$ORIG_CFLAGS
 535         ])
 536 fi
 537
 538 DISABLED_FEATURES=none
 539
 540 AC_ARG_ENABLE(minimal, [  --enable-minimal=LIST      drop support for LIST subsystems.
 541   LIST is a comma-separated list from: aot, profiler, decimal, pinvoke, debug,
 542   reflection_emit, large_code, logging, com, ssa, generics.],
 543 [
 544         for feature in `echo "$enable_minimal" | sed -e "s/,/ /g"`; do
 545                 eval "mono_feature_disable_$feature='yes'"
 546                 AC_MSG_NOTICE([Disabled support for feature: $feature])
 547         done
 548         DISABLED_FEATURES=$enable_minimal
 549         disabled="Disabled:    $enable_minimal"
 550 ],[])
 551
 552 AC_DEFINE_UNQUOTED(DISABLED_FEATURES, "$DISABLED_FEATURES", [String of disabled features])
 553
 554 if test "x$mono_feature_disable_aot" = "xyes"; then
 555         AC_DEFINE(DISABLE_AOT, 1, [Disable AOT support])
 556 fi
 557
 558 if test "x$mono_feature_disable_profiler" = "xyes"; then
 559         AC_DEFINE(DISABLE_PROFILER, 1, [Disable default profiler support])
 560 fi
 561
 562 if test "x$mono_feature_disable_decimal" = "xyes"; then
 563         AC_DEFINE(DISABLE_DECIMAL, 1, [Disable System.Decimal support])
 564 fi
 565
 566 if test "x$mono_feature_disable_pinvoke" = "xyes"; then
 567         AC_DEFINE(DISABLE_PINVOKE, 1, [Disable P/Invoke support])
 568 fi
 569
 570 if test "x$mono_feature_disable_debug" = "xyes"; then
 571         AC_DEFINE(DISABLE_DEBUG, 1, [Disable runtime debugging support])
 572 fi
 573
 574 if test "x$mono_feature_disable_reflection_emit" = "xyes"; then
 575         AC_DEFINE(DISABLE_REFLECTION_EMIT, 1, [Disable reflection emit support])
 576 fi
 577
 578 if test "x$mono_feature_disable_large_code" = "xyes"; then
 579         AC_DEFINE(DISABLE_LARGE_CODE, 1, [Disable support for huge assemblies])
 580 fi
 581
 582 if test "x$mono_feature_disable_logging" = "xyes"; then
 583         AC_DEFINE(DISABLE_LOGGING, 1, [Disable support debug logging])
 584 fi
 585
 586 if test "x$mono_feature_disable_com" = "xyes"; then
 587         AC_DEFINE(DISABLE_COM, 1, [Disable COM support])
 588 fi
 589
 590 if test "x$mono_feature_disable_ssa" = "xyes"; then
 591         AC_DEFINE(DISABLE_SSA, 1, [Disable advanced SSA JIT optimizations])
 592 fi
 593
 594 if test "x$mono_feature_disable_generics" = "xyes"; then
 595         AC_DEFINE(DISABLE_GENERICS, 1, [Disable generics support])
 596 fi
 597
 598 AC_MSG_CHECKING(for visibility __attribute__)
 599 AC_TRY_COMPILE([], [
 600    void __attribute__ ((visibility ("hidden"))) doit (void) {}
 601    void main () { doit (); }
 602 ], [
 603    have_visibility_hidden=yes
 604    AC_MSG_RESULT(yes)
 605 ], [
 606    have_visibility_hidden=no
 607    AC_MSG_RESULT(no)
 608 ])
 609
 610 LIBGC_CFLAGS=
 611 LIBGC_LIBS=
 612 LIBGC_STATIC_LIBS=
 613 libgc_dir=
 614 case "x$gc" in
 615         xboehm|xbohem|xyes)
 616                 AC_CHECK_HEADERS(gc.h gc/gc.h, gc_headers=yes)
 617                 AC_CHECK_LIB(gc, GC_malloc, found_boehm="yes",,$libdl)
 618
 619                 if test "x$found_boehm" != "xyes"; then
 620                         AC_MSG_ERROR("GC requested but libgc not found! Install libgc or run configure with --with-gc=none.")
 621                 fi
 622                 if test "x$gc_headers" != "xyes"; then
 623                         AC_MSG_ERROR("GC requested but header files not found! You may need to install them by hand.")
 624                 fi
 625
 626                 AC_DEFINE(HAVE_BOEHM_GC)
 627                 AC_SUBST(HAVE_BOEHM_GC)
 628                 LIBGC_LIBS="-lgc $libdl"
 629                 LIBGC_STATIC_LIBS="$LIBGC_LIBS"
 630
 631                 # AC_CHECK_FUNCS does not work for some reason...
 632                 AC_CHECK_LIB(gc, GC_gcj_malloc, found_gcj_malloc="yes",,$libdl)
 633                 if test "x$found_gcj_malloc" = "xyes"; then
 634                         AC_DEFINE(HAVE_GC_GCJ_MALLOC)
 635                         AC_DEFINE_UNQUOTED(USED_GC_NAME, "System Boehm (with typed GC)", [GC description])
 636                 else
 637                         AC_DEFINE_UNQUOTED(USED_GC_NAME, "System Boehm (no typed GC)", [GC description])
 638                 fi
 639                 AC_CHECK_LIB(gc, GC_enable, found_gc_enable="yes",,$libdl)
 640                 if test "x$found_gc_enable" = "xyes"; then
 641                         AC_DEFINE(HAVE_GC_ENABLE)
 642                 fi
 643                 ;;
 644
 645         xincluded)
 646                 AC_CONFIG_SUBDIRS(libgc)
 647
 648                 # Pass CPPFLAGS to libgc configure
 649                 # Maybe we should use a separate variable for this to avoid passing useless and
 650                 # potentially problematic defines to libgc (like -D_FILE_OFFSET_BITS=64)
 651                 export CPPFLAGS
 652
 653                 found_boehm=yes
 654                 gc_headers=yes
 655                 use_included_gc=yes
 656                 libgc_dir=libgc
 657
 658                 LIBGC_CFLAGS='-I$(top_srcdir)/libgc/include'
 659                 LIBGC_LIBS='$(top_builddir)/libgc/libmonogc.la'
 660                 LIBGC_STATIC_LIBS='$(top_builddir)/libgc/libmonogc-static.la'
 661
 662                 AC_DEFINE(HAVE_BOEHM_GC)
 663                 AC_SUBST(HAVE_BOEHM_GC)
 664
 665                 AC_DEFINE(HAVE_GC_H)
 666                 AC_DEFINE(USE_INCLUDED_LIBGC)
 667
 668                 # The included libgc contains GCJ support
 669                 AC_DEFINE(HAVE_GC_GCJ_MALLOC)
 670                 AC_DEFINE(HAVE_GC_ENABLE)
 671                 AC_DEFINE_UNQUOTED(USED_GC_NAME, "Included Boehm (with typed GC)", [GC description])
 672                 ;;
 673
 674         xsgen)
 675                 found_boehm=no
 676                 gc_headers=no
 677                 use_included_gc=no
 678                 AC_DEFINE(HAVE_SGEN_GC,1,[Using the simple generational GC.])
 679                 AC_DEFINE(HAVE_MOVING_COLLECTOR,1,[The GC can move objects.])
 680                 AC_DEFINE(HAVE_WRITE_BARRIERS,1,[The GC needs write barriers.])
 681                 AC_DEFINE_UNQUOTED(USED_GC_NAME, "Simple generational", [GC description])
 682                 ;;
 683
 684         xnone)
 685                 AC_MSG_WARN("Compiling mono without GC.")
 686                 AC_DEFINE_UNQUOTED(USED_GC_NAME, "none", [GC description])
 687                 AC_DEFINE(HAVE_NULL_GC,1,[No GC support.])
 688                 ;;
 689         *)
 690                 AC_MSG_ERROR([Invalid argument to --with-gc.])
 691                 ;;
 692 esac
 693
 694 AC_ARG_WITH(large-heap, [  --with-large-heap=yes,no    Enable support for GC heaps larger than 3GB], [large_heap=$withval], [large_heap=no])
 695 if test "x$large_heap" = "xyes"; then
 696    echo "FOO"
 697    CPPFLAGS="$CPPFLAGS -DLARGE_CONFIG"
 698 fi
 699
 700 # tell libgc/configure about what we want
 701 ac_configure_args="$ac_configure_args --disable-embed-check --with-libgc-threads=$libgc_threads $libgc_configure_args"
 702
 703 AM_CONDITIONAL(INCLUDED_LIBGC, test x$use_included_gc = xyes)
 704 AC_SUBST(LIBGC_CFLAGS)
 705 AC_SUBST(LIBGC_LIBS)
 706 AC_SUBST(LIBGC_STATIC_LIBS)
 707 AC_SUBST(libgc_dir)
 708
 709 dnl
 710 dnl End of libgc checks
 711 dnl
 712
 713 if test x$platform_win32 = xno; then
 714
 715         dnl dynamic loader support
 716         AC_CHECK_FUNC(dlopen, DL_LIB="",
 717                 AC_CHECK_LIB(dl, dlopen, DL_LIB="-ldl", dl_support=no)
 718         )
 719         if test x$dl_support = xno; then
 720                 AC_MSG_WARN([No dynamic loading support available])
 721         else
 722                 LIBS="$LIBS $DL_LIB"
 723                 AC_DEFINE(HAVE_DL_LOADER,1,[dlopen-based dynamic loader available])
 724                 dnl from glib's configure.in
 725                 AC_CACHE_CHECK([for preceeding underscore in symbols],
 726                         mono_cv_uscore,[
 727                         AC_TRY_RUN([#include <dlfcn.h>
 728                         int mono_underscore_test (void) { return 42; }
 729                         int main() {
 730                           void *f1 = (void*)0, *f2 = (void*)0, *handle;
 731                           handle = dlopen ((void*)0, 0);
 732                           if (handle) {
 733                             f1 = dlsym (handle, "mono_underscore_test");
 734                             f2 = dlsym (handle, "_mono_underscore_test");
 735                           } return (!f2 || f1);
 736                         }],
 737                                 [mono_cv_uscore=yes],
 738                                 [mono_cv_uscore=no],
 739                         [])
 740                 ])
 741                 if test "x$mono_cv_uscore" = "xyes"; then
 742                         MONO_DL_NEED_USCORE=1
 743                 else
 744                         MONO_DL_NEED_USCORE=0
 745                 fi
 746                 AC_SUBST(MONO_DL_NEED_USCORE)
 747                 AC_CHECK_FUNC(dlerror)
 748         fi
 749
 750         dnl ******************************************************************
 751         dnl *** Checks for the IKVM JNI interface library                  ***
 752         dnl ******************************************************************
 753         AC_ARG_WITH(ikvm-native, [  --with-ikvm-native=yes,no  build the IKVM JNI interface library],[with_ikvm_native=$withval],[with_ikvm_native=yes])
 754
 755         ikvm_native_dir=
 756         if test x$with_ikvm_native = xyes; then
 757                 ikvm_native_dir=ikvm-native
 758                 jdk_headers_found="IKVM Native"
 759         fi
 760
 761         AC_SUBST(ikvm_native_dir)
 762
 763         AC_CHECK_HEADERS(execinfo.h)
 764
 765         AC_CHECK_FUNCS(getgrgid_r)
 766         AC_CHECK_FUNCS(getgrnam_r)
 767         AC_CHECK_FUNCS(getpwnam_r)
 768         AC_CHECK_FUNCS(getpwuid_r)
 769         AC_CHECK_FUNCS(getresuid)
 770         AC_CHECK_FUNCS(setresuid)
 771         AC_CHECK_FUNCS(kqueue)
 772         AC_CHECK_FUNCS(backtrace_symbols)
 773         AC_CHECK_FUNCS(mkstemp)
 774         AC_CHECK_FUNCS(mmap)
 775         AC_CHECK_FUNCS(madvise)
 776         AC_CHECK_FUNCS(getrusage)
 777         AC_CHECK_FUNCS(getpriority)
 778         AC_CHECK_FUNCS(setpriority)
 779
 780         AC_CHECK_FUNCS(sched_setaffinity)
 781
 782         dnl ******************************************************************
 783         dnl *** Check for large file support                               ***
 784         dnl *** (If we were using autoconf 2.50 we'd use AC_SYS_LARGEFILE) ***
 785         dnl ******************************************************************
 786
 787         # Check that off_t can represent 2**63 - 1 correctly, working around
 788         # potential compiler bugs.  Defines LARGE_FILE_SUPPORT, adds $1 to
 789         # CPPFLAGS and sets $large_offt to yes if the test succeeds
 790         large_offt=no
 791         AC_DEFUN([LARGE_FILES], [
 792                 large_CPPFLAGS=$CPPFLAGS
 793                 CPPFLAGS="$CPPFLAGS $1"
 794                 AC_TRY_RUN([
 795                         #include <sys/types.h>
 796
 797                         #define BIG_OFF_T (((off_t)1<<62)-1+((off_t)1<<62))
 798
 799                         int main(void) {
 800                                 int big_off_t=((BIG_OFF_T%2147483629==721) &&
 801                                                (BIG_OFF_T%2147483647==1));
 802                                 if(big_off_t) {
 803                                         exit(0);
 804                                 } else {
 805                                         exit(1);
 806                                 }
 807                         }
 808                 ], [
 809                         AC_MSG_RESULT(ok)
 810                         AC_DEFINE(HAVE_LARGE_FILE_SUPPORT)
 811                         large_CPPFLAGS="$large_CPPFLAGS $1"
 812                         large_offt=yes
 813                 ], [
 814                         AC_MSG_RESULT(no)
 815                 ], "")
 816                 CPPFLAGS=$large_CPPFLAGS
 817         ])
 818
 819         AC_MSG_CHECKING(if off_t is 64 bits wide)
 820         LARGE_FILES("")
 821         if test $large_offt = no; then
 822                 AC_MSG_CHECKING(if _FILE_OFFSET_BITS=64 gives 64 bit off_t)
 823                 LARGE_FILES("-D_FILE_OFFSET_BITS=64")
 824         fi
 825         if test $large_offt = no; then
 826                 AC_MSG_WARN([No 64 bit file size support available])
 827         fi
 828
 829         dnl *****************************
 830         dnl *** Checks for libsocket  ***
 831         dnl *****************************
 832         AC_CHECK_LIB(socket, socket, LIBS="$LIBS -lsocket")
 833
 834         dnl *******************************
 835         dnl *** Checks for MSG_NOSIGNAL ***
 836         dnl *******************************
 837         AC_MSG_CHECKING(for MSG_NOSIGNAL)
 838         AC_TRY_COMPILE([#include <sys/socket.h>], [
 839                 int f = MSG_NOSIGNAL;
 840         ], [
 841                 # Yes, we have it...
 842                 AC_MSG_RESULT(yes)
 843                 AC_DEFINE(HAVE_MSG_NOSIGNAL)
 844         ], [
 845                 # We'll have to use signals
 846                 AC_MSG_RESULT(no)
 847         ])
 848
 849         dnl *****************************
 850         dnl *** Checks for SOL_IP     ***
 851         dnl *****************************
 852         AC_MSG_CHECKING(for SOL_IP)
 853         AC_TRY_COMPILE([#include <netdb.h>], [
 854                 int level = SOL_IP;
 855         ], [
 856                 # Yes, we have it...
 857                 AC_MSG_RESULT(yes)
 858                 AC_DEFINE(HAVE_SOL_IP)
 859         ], [
 860                 # We'll have to use getprotobyname
 861                 AC_MSG_RESULT(no)
 862         ])
 863
 864         dnl *****************************
 865         dnl *** Checks for SOL_IPV6     ***
 866         dnl *****************************
 867         AC_MSG_CHECKING(for SOL_IPV6)
 868         AC_TRY_COMPILE([#include <netdb.h>], [
 869                 int level = SOL_IPV6;
 870         ], [
 871                 # Yes, we have it...
 872                 AC_MSG_RESULT(yes)
 873                 AC_DEFINE(HAVE_SOL_IPV6)
 874         ], [
 875                 # We'll have to use getprotobyname
 876                 AC_MSG_RESULT(no)
 877         ])
 878
 879         dnl *****************************
 880         dnl *** Checks for SOL_TCP    ***
 881         dnl *****************************
 882         AC_MSG_CHECKING(for SOL_TCP)
 883         AC_TRY_COMPILE([#include <netdb.h>], [
 884                 int level = SOL_TCP;
 885         ], [
 886                 # Yes, we have it...
 887                 AC_MSG_RESULT(yes)
 888                 AC_DEFINE(HAVE_SOL_TCP)
 889         ], [
 890                 # We'll have to use getprotobyname
 891                 AC_MSG_RESULT(no)
 892         ])
 893
 894         dnl *****************************
 895         dnl *** Checks for IP_PKTINFO ***
 896         dnl *****************************
 897         AC_MSG_CHECKING(for IP_PKTINFO)
 898         AC_TRY_COMPILE([#include <netdb.h>], [
 899                 int level = IP_PKTINFO;
 900         ], [
 901                 # Yes, we have it...
 902                 AC_MSG_RESULT(yes)
 903                 AC_DEFINE(HAVE_IP_PKTINFO)
 904         ], [
 905                 AC_MSG_RESULT(no)
 906         ])
 907
 908         dnl *****************************
 909         dnl *** Checks for IPV6_PKTINFO ***
 910         dnl *****************************
 911         AC_MSG_CHECKING(for IPV6_PKTINFO)
 912         AC_TRY_COMPILE([#include <netdb.h>], [
 913                 int level = IPV6_PKTINFO;
 914         ], [
 915                 # Yes, we have it...
 916                 AC_MSG_RESULT(yes)
 917                 AC_DEFINE(HAVE_IPV6_PKTINFO)
 918         ], [
 919                 AC_MSG_RESULT(no)
 920         ])
 921
 922         dnl **********************************
 923         dnl *** Checks for IP_DONTFRAGMENT ***
 924         dnl **********************************
 925         AC_MSG_CHECKING(for IP_DONTFRAGMENT)
 926         AC_TRY_COMPILE([#include <netdb.h>], [
 927                 int level = IP_DONTFRAGMENT;
 928         ], [
 929                 # Yes, we have it...
 930                 AC_MSG_RESULT(yes)
 931                 AC_DEFINE(HAVE_IP_DONTFRAGMENT)
 932         ], [
 933                 AC_MSG_RESULT(no)
 934         ])
 935
 936         dnl **********************************
 937         dnl *** Checks for IP_MTU_DISCOVER ***
 938         dnl **********************************
 939         AC_MSG_CHECKING(for IP_MTU_DISCOVER)
 940         AC_TRY_COMPILE([#include <netdb.h>], [
 941                 int level = IP_MTU_DISCOVER;
 942         ], [
 943                 # Yes, we have it...
 944                 AC_MSG_RESULT(yes)
 945                 AC_DEFINE(HAVE_IP_MTU_DISCOVER)
 946         ], [
 947                 AC_MSG_RESULT(no)
 948         ])
 949
 950         dnl *********************************
 951         dnl *** Check for struct ip_mreqn ***
 952         dnl *********************************
 953         AC_MSG_CHECKING(for struct ip_mreqn)
 954         AC_TRY_COMPILE([#include <netinet/in.h>], [
 955                 struct ip_mreqn mreq;
 956                 mreq.imr_address.s_addr = 0;
 957         ], [
 958                 # Yes, we have it...
 959                 AC_MSG_RESULT(yes)
 960                 AC_DEFINE(HAVE_STRUCT_IP_MREQN)
 961         ], [
 962                 # We'll just have to try and use struct ip_mreq
 963                 AC_MSG_RESULT(no)
 964                 AC_MSG_CHECKING(for struct ip_mreq)
 965                 AC_TRY_COMPILE([#include <netinet/in.h>], [
 966                         struct ip_mreq mreq;
 967                         mreq.imr_interface.s_addr = 0;
 968                 ], [
 969                         # Yes, we have it...
 970                         AC_MSG_RESULT(yes)
 971                         AC_DEFINE(HAVE_STRUCT_IP_MREQ)
 972                 ], [
 973                         # No multicast support
 974                         AC_MSG_RESULT(no)
 975                 ])
 976         ])
 977
 978         dnl **********************************
 979         dnl *** Check for gethostbyname2_r ***
 980         dnl **********************************
 981         AC_MSG_CHECKING(for gethostbyname2_r)
 982                 AC_TRY_LINK([#include <netdb.h>], [
 983                 gethostbyname2_r(NULL,0,NULL,NULL,0,NULL,NULL);
 984         ], [
 985                 # Yes, we have it...
 986                 AC_MSG_RESULT(yes)
 987                 AC_DEFINE(HAVE_GETHOSTBYNAME2_R)
 988         ], [
 989                 AC_MSG_RESULT(no)
 990         ])
 991
 992         dnl *****************************
 993         dnl *** Checks for libnsl     ***
 994         dnl *****************************
 995         AC_CHECK_FUNC(gethostbyaddr, , AC_CHECK_LIB(nsl, gethostbyaddr, LIBS="$LIBS -lnsl"))
 996
 997         AC_CHECK_FUNCS(inet_pton inet_aton)
 998
 999         dnl ***********************************************
1000         dnl *** Checks for size of sockaddr_un.sun_path ***
1001         dnl ***********************************************
1002         # AC_CHECK_SIZEOF can't cope with struct members :-(
1003         AC_MSG_CHECKING(size of sockaddr_un.sun_path)
1004         AC_CACHE_VAL(cv_mono_sizeof_sunpath,
1005                 [AC_TRY_RUN([
1006                         #include <sys/types.h>
1007                         #include <stdio.h>
1008                         #include <sys/un.h>
1009
1010                         int main(void) {
1011                                 struct sockaddr_un sock_un;
1012                                 FILE *f=fopen("conftestval", "w");
1013                                 if(!f) exit(1);
1014                                 fprintf(f, "%d\n", sizeof(sock_un.sun_path));
1015                                 exit(0);
1016                         }
1017                 ], cv_mono_sizeof_sunpath=`cat conftestval`,
1018                    cv_mono_sizeof_sunpath=0,
1019                    cv_mono_sizeof_sunpath=0)])dnl
1020         AC_MSG_RESULT($cv_mono_sizeof_sunpath)
1021         AC_DEFINE_UNQUOTED(MONO_SIZEOF_SUNPATH, $cv_mono_sizeof_sunpath)
1022
1023         dnl *************************************
1024         dnl *** Checks for zero length arrays ***
1025         dnl *************************************
1026         AC_MSG_CHECKING(whether $CC supports zero length arrays)
1027         AC_TRY_COMPILE([
1028                 struct s {
1029                         int  length;
1030                         char data [0];
1031                 };
1032         ], [], [
1033                 AC_MSG_RESULT(yes)
1034                 AC_DEFINE_UNQUOTED(MONO_ZERO_ARRAY_LENGTH, 0)
1035         ], [
1036                 AC_MSG_RESULT(no)
1037                 AC_DEFINE_UNQUOTED(MONO_ZERO_ARRAY_LENGTH, 1)
1038         ])
1039
1040         dnl *****************************
1041         dnl *** Checks for libxnet    ***
1042         dnl *****************************
1043         case "${host}" in
1044                 *solaris* )
1045                         AC_MSG_CHECKING(for Solaris XPG4 support)
1046                         if test -f /usr/lib/libxnet.so; then
1047                                 CPPFLAGS="$CPPFLAGS -D_XOPEN_SOURCE=500"
1048                                 CPPFLAGS="$CPPFLAGS -D__EXTENSIONS__"
1049                                 CPPFLAGS="$CPPFLAGS -D_XOPEN_SOURCE_EXTENDED=1"
1050                                 LIBS="$LIBS -lxnet"
1051                                 AC_MSG_RESULT(yes)
1052                         else
1053                                 AC_MSG_RESULT(no)
1054                         fi
1055
1056                         if test "$GCC" = "yes"; then
1057                                 CFLAGS="$CFLAGS -Wno-char-subscripts"
1058                         fi
1059                 ;;
1060         esac
1061
1062         dnl *****************************
1063         dnl *** Checks for libpthread ***
1064         dnl *****************************
1065 # on FreeBSD -STABLE, the pthreads functions all reside in libc_r
1066 # and libpthread does not exist
1067 #
1068         case "${host}" in
1069                 *-*-*freebsd4*)
1070                         AC_CHECK_LIB(pthread, main, LIBS="$LIBS -pthread")
1071                 ;;
1072                 *-*-*freebsd5*)
1073                         AC_CHECK_LIB(pthread, main, LIBS="$LIBS -pthread")
1074                 ;;
1075                 *-*-*freebsd6*)
1076                         AC_CHECK_LIB(pthread, main, LIBS="$LIBS -pthread")
1077                 ;;
1078                 *)
1079                         AC_CHECK_LIB(pthread, main, LIBS="$LIBS -lpthread")
1080                 ;;
1081         esac
1082         AC_CHECK_HEADERS(pthread.h)
1083         AC_CHECK_FUNCS(pthread_mutex_timedlock)
1084         AC_CHECK_FUNCS(pthread_getattr_np pthread_attr_get_np)
1085         AC_MSG_CHECKING(for PTHREAD_MUTEX_RECURSIVE)
1086         AC_TRY_COMPILE([ #include <pthread.h>], [
1087                 pthread_mutexattr_t attr;
1088                 pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE);
1089         ], [
1090                 AC_MSG_RESULT(ok)
1091         ], [
1092                 AC_MSG_RESULT(no)
1093                 AC_MSG_WARN(Using mono_mutex_t for recursive mutexes)
1094                 AC_DEFINE(USE_MONO_MUTEX)
1095         ])
1096         AC_CHECK_FUNCS(pthread_attr_setstacksize)
1097         AC_CHECK_FUNCS(pthread_attr_getstack)
1098         AC_CHECK_FUNCS(pthread_get_stacksize_np pthread_get_stackaddr_np)
1099
1100         dnl ***********************************
1101         dnl *** Checks for working __thread ***
1102         dnl ***********************************
1103         AC_MSG_CHECKING(for working __thread)
1104         if test "x$with_tls" != "x__thread"; then
1105                 AC_MSG_RESULT(disabled)
1106         else
1107                 AC_TRY_RUN([
1108                         #include <pthread.h>
1109                         __thread int i;
1110                         static int res1, res2;
1111
1112                         void thread_main (void *arg)
1113                         {
1114                                 i = arg;
1115                                 sleep (1);
1116                                 if (arg == 1)
1117                                         res1 = (i == arg);
1118                                 else
1119                                         res2 = (i == arg);
1120                         }
1121
1122                         int main () {
1123                                 pthread_t t1, t2;
1124
1125                                 i = 5;
1126
1127                                 pthread_create (&t1, NULL, thread_main, 1);
1128                                 pthread_create (&t2, NULL, thread_main, 2);
1129
1130                                 pthread_join (t1, NULL);
1131                                 pthread_join (t2, NULL);
1132
1133                                 return !(res1 + res2 == 2);
1134                         }
1135                 ], [
1136                                 AC_MSG_RESULT(yes)
1137                 ], [
1138                                 AC_MSG_RESULT(no)
1139                                 with_tls=pthread
1140                 ])
1141         fi
1142
1143         dnl **************************************
1144         dnl *** Checks for working sigaltstack ***
1145         dnl **************************************
1146         AC_MSG_CHECKING(for working sigaltstack)
1147         if test "x$with_sigaltstack" != "xyes"; then
1148                 AC_MSG_RESULT(disabled)
1149         else
1150                 AC_TRY_RUN([
1151                         #include <stdio.h>
1152                         #include <stdlib.h>
1153                         #include <unistd.h>
1154                         #include <signal.h>
1155                         #include <pthread.h>
1156                         #include <sys/wait.h>
1157                         #if defined(__FreeBSD__) || defined(__NetBSD__)
1158                         #define SA_STACK SA_ONSTACK
1159                         #endif
1160                         static void
1161                         sigsegv_signal_handler (int _dummy, siginfo_t *info, void *context)
1162                         {
1163                                 exit (0);
1164                         }
1165
1166                         static void *
1167                         loop (void *ignored)
1168                         {
1169                                 char *ptr = NULL;
1170
1171                                 *ptr = 0;
1172                                 return NULL;
1173                         }
1174
1175                         static void
1176                         child ()
1177                         {
1178                                 struct sigaction sa;
1179                                 struct sigaltstack sas;
1180                                 pthread_t id;
1181                                 pthread_attr_t attr;
1182
1183                                 sa.sa_sigaction = sigsegv_signal_handler;
1184                                 sigemptyset (&sa.sa_mask);
1185                                 sa.sa_flags = SA_SIGINFO | SA_ONSTACK;
1186                                 if (sigaction (SIGSEGV, &sa, NULL) == -1) {
1187                                         perror ("sigaction");
1188                                         return;
1189                                 }
1190
1191                                 sas.ss_sp = malloc (SIGSTKSZ);
1192                                 sas.ss_size = SIGSTKSZ;
1193                                 sas.ss_flags = 0;
1194                                 if (sigaltstack (&sas, NULL) == -1) {
1195                                         perror ("sigaltstack");
1196                                         return;
1197                                 }
1198
1199                                 pthread_attr_init (&attr);
1200                                 if (pthread_create(&id, &attr, loop, &attr) != 0) {
1201                                         printf ("pthread_create\n");
1202                                         return;
1203                                 }
1204
1205                                 sleep (100);
1206                         }
1207
1208                         int
1209                         main ()
1210                         {
1211                                 pid_t son;
1212                                 int status;
1213                                 int i;
1214
1215                                 son = fork ();
1216                                 if (son == -1) {
1217                                         return 1;
1218                                 }
1219
1220                                 if (son == 0) {
1221                                         child ();
1222                                         return 0;
1223                                 }
1224
1225                                 for (i = 0; i < 3; ++i) {
1226                                         sleep (1);
1227                                         waitpid (son, &status, WNOHANG);
1228                                         if (WIFEXITED (status) && WEXITSTATUS (status) == 0)
1229                                                 return 0;
1230                                 }
1231
1232                                 kill (son, SIGKILL);
1233                                 return 1;
1234                         }
1235
1236                 ], [
1237                                 AC_MSG_RESULT(yes)
1238                                 AC_DEFINE(HAVE_WORKING_SIGALTSTACK)
1239                 ], [
1240                                 with_sigaltstack=no
1241                                 AC_MSG_RESULT(no)
1242                 ])
1243         fi
1244
1245         dnl ********************************
1246         dnl *** Checks for semaphore lib ***
1247         dnl ********************************
1248         # 'Real Time' functions on Solaris
1249         # posix4 on Solaris 2.6
1250         # pthread (first!) on Linux
1251         AC_SEARCH_LIBS(sem_init, pthread rt posix4)
1252
1253         dnl ********************************
1254         dnl *** Checks for timezone stuff **
1255         dnl ********************************
1256         AC_CACHE_CHECK(for tm_gmtoff in struct tm, ac_cv_struct_tm_gmtoff,
1257                 AC_TRY_COMPILE([
1258                         #include <time.h>
1259                         ], [
1260                         struct tm tm;
1261                         tm.tm_gmtoff = 1;
1262                         ], ac_cv_struct_tm_gmtoff=yes, ac_cv_struct_tm_gmtoff=no))
1263         if test $ac_cv_struct_tm_gmtoff = yes; then
1264                 AC_DEFINE(HAVE_TM_GMTOFF)
1265         else
1266                 AC_CACHE_CHECK(for timezone variable, ac_cv_var_timezone,
1267                         AC_TRY_COMPILE([
1268                                 #include <time.h>
1269                         ], [
1270                                 timezone = 1;
1271                         ], ac_cv_var_timezone=yes, ac_cv_var_timezone=no))
1272                 if test $ac_cv_var_timezone = yes; then
1273                         AC_DEFINE(HAVE_TIMEZONE)
1274                 else
1275                         AC_ERROR(unable to find a way to determine timezone)
1276                 fi
1277         fi
1278
1279         dnl *********************************
1280         dnl *** Checks for math functions ***
1281         dnl *********************************
1282         LIBS="$LIBS -lm";
1283         AC_CHECK_FUNCS(finite, , AC_MSG_CHECKING(for finite in math.h)
1284                 AC_TRY_LINK([#include <math.h>],
1285                 [ finite(0.0); ],
1286                 AC_DEFINE(HAVE_FINITE) AC_MSG_RESULT(yes),
1287                 AC_MSG_RESULT(no)))
1288         AC_CHECK_FUNCS(isfinite, , AC_MSG_CHECKING(for isfinite in math.h)
1289                 AC_TRY_LINK([#include <math.h>],
1290                 [ isfinite(0.0); ],
1291                 AC_DEFINE(HAVE_ISFINITE) AC_MSG_RESULT(yes),
1292                 AC_MSG_RESULT(no)))
1293
1294         dnl ****************************************************************
1295         dnl *** Checks for working poll() (macosx defines it but doesn't ***
1296         dnl *** have it in the library (duh))                            ***
1297         dnl ****************************************************************
1298         AC_CHECK_FUNCS(poll)
1299
1300         dnl *************************
1301         dnl *** Check for signbit ***
1302         dnl *************************
1303         AC_MSG_CHECKING(for signbit)
1304         AC_TRY_LINK([#include <math.h>], [
1305                 int s = signbit(1.0);
1306         ], [
1307                 AC_MSG_RESULT(yes)
1308                 AC_DEFINE(HAVE_SIGNBIT)
1309         ], [
1310                 AC_MSG_RESULT(no)
1311         ])
1312
1313         dnl **********************************
1314         dnl *** epoll                      ***
1315         dnl **********************************
1316         AC_CHECK_HEADERS(sys/epoll.h)
1317         haveepoll=no
1318         AC_CHECK_FUNCS(epoll_ctl, [haveepoll=yes], )
1319         if test "x$haveepoll" = "xyes" -a "x$ac_cv_header_sys_epoll_h" = "xyes" ; then
1320                 AC_DEFINE(HAVE_EPOLL, 1, [epoll supported])
1321         fi
1322
1323         dnl ******************************
1324         dnl *** Checks for SIOCGIFCONF ***
1325         dnl ******************************
1326         AC_CHECK_HEADERS(sys/ioctl.h)
1327         AC_CHECK_HEADERS(net/if.h)
1328         AC_MSG_CHECKING(for ifreq)
1329         AC_TRY_COMPILE([
1330                 #include <sys/ioctl.h>
1331                 #include <net/if.h>
1332                 ], [
1333                 struct ifconf ifc;
1334                 struct ifreq *ifr;
1335                 void *x;
1336                 ifc.ifc_len = 0;
1337                 ifc.ifc_buf = NULL;
1338                 x = (void *) &ifr->ifr_addr;
1339                 ],[
1340                         AC_MSG_RESULT(yes)
1341                         AC_DEFINE(HAVE_SIOCGIFCONF, 1, [Can get interface list])
1342                 ], [
1343                         AC_MSG_RESULT(no)
1344                 ])
1345         dnl **********************************
1346         dnl *** Checks for MonoPosixHelper ***
1347         dnl **********************************
1348         AC_CHECK_HEADERS(checklist.h)
1349         AC_CHECK_HEADERS(fstab.h)
1350         AC_CHECK_HEADERS(attr/xattr.h)
1351         AC_CHECK_HEADERS(sys/extattr.h)
1352         AC_CHECK_HEADERS(sys/sendfile.h)
1353         AC_CHECK_HEADERS(sys/statvfs.h)
1354         AC_CHECK_HEADERS(sys/vfstab.h)
1355         AC_CHECK_HEADERS(sys/xattr.h)
1356         AC_CHECK_HEADERS(sys/mman.h)
1357         AC_CHECK_FUNCS(getdomainname)
1358         AC_CHECK_FUNCS(setdomainname)
1359         AC_CHECK_FUNCS(fgetgrent)
1360         AC_CHECK_FUNCS(fgetpwent)
1361         AC_CHECK_FUNCS(fgetpwent)
1362         AC_CHECK_FUNCS(getfsstat)
1363         AC_CHECK_FUNCS(lutimes)
1364         AC_CHECK_FUNCS(mremap)
1365         AC_CHECK_FUNCS(remap_file_pages)
1366         AC_CHECK_FUNCS(posix_fadvise)
1367         AC_CHECK_FUNCS(posix_fallocate)
1368         AC_CHECK_FUNCS(posix_madvise)
1369         AC_CHECK_FUNCS(vsnprintf)
1370         AC_CHECK_FUNCS(sendfile)
1371         AC_CHECK_FUNCS(sethostid)
1372         AC_CHECK_FUNCS(statfs)
1373         AC_CHECK_FUNCS(fstatfs)
1374         AC_CHECK_FUNCS(statvfs)
1375         AC_CHECK_FUNCS(fstatvfs)
1376         AC_CHECK_FUNCS(stime)
1377         AC_CHECK_FUNCS(strerror_r)
1378         AC_CHECK_FUNCS(ttyname_r)
1379         AC_CHECK_SIZEOF(size_t)
1380         AC_CHECK_TYPES([blksize_t], [AC_DEFINE(HAVE_BLKSIZE_T)], ,
1381                 [#include <sys/types.h>
1382                  #include <sys/stat.h>
1383                  #include <unistd.h>])
1384         AC_CHECK_TYPES([blkcnt_t], [AC_DEFINE(HAVE_BLKCNT_T)], ,
1385                 [#include <sys/types.h>
1386                  #include <sys/stat.h>
1387                  #include <unistd.h>])
1388         AC_CHECK_TYPES([suseconds_t], [AC_DEFINE(HAVE_SUSECONDS_T)], ,
1389                 [#include <sys/time.h>])
1390         AC_CHECK_TYPES([struct pollfd], [AC_DEFINE(HAVE_STRUCT_POLLFD)], ,
1391                 [#include <sys/poll.h>])
1392         AC_CHECK_TYPES([struct stat], [AC_DEFINE(HAVE_STRUCT_STAT)], ,
1393                 [#include <sys/types.h>
1394                  #include <sys/stat.h>
1395                  #include <unistd.h>])
1396         AC_CHECK_TYPES([struct timeval], [AC_DEFINE(HAVE_STRUCT_TIMEVAL)], ,
1397                 [#include <sys/time.h>
1398                  #include <sys/types.h>
1399                  #include <utime.h>])
1400         AC_CHECK_TYPES([struct timezone], [AC_DEFINE(HAVE_STRUCT_TIMEZONE)], ,
1401                 [#include <sys/time.h>])
1402         AC_CHECK_TYPES([struct utimbuf], [AC_DEFINE(HAVE_STRUCT_UTIMBUF)], ,
1403                 [#include <sys/types.h>
1404                  #include <utime.h>])
1405         AC_CHECK_MEMBERS(
1406                 [struct dirent.d_off, struct dirent.d_reclen, struct dirent.d_type],,,
1407                 [#include <sys/types.h>
1408                  #include <dirent.h>])
1409
1410         dnl Favour xattr through glibc, but use libattr if we have to
1411         AC_CHECK_FUNC(lsetxattr, ,
1412                 AC_CHECK_LIB(attr, lsetxattr, XATTR_LIB="-lattr",)
1413         )
1414         AC_SUBST(XATTR_LIB)
1415
1416         dnl *********************************
1417         dnl *** Checks for Windows compilation ***
1418         dnl *********************************
1419         AC_CHECK_HEADERS(sys/time.h)
1420         AC_CHECK_HEADERS(sys/param.h)
1421
1422         dnl *********************************
1423         dnl *** Check for Console 2.0 I/O ***
1424         dnl *********************************
1425         AC_CHECK_HEADERS([curses.h])
1426         AC_CHECK_HEADERS([term.h], [], [],
1427         [#if HAVE_CURSES_H
1428          #include <curses.h>
1429          #endif
1430         ])
1431         AC_CHECK_HEADERS([termios.h])
1432
1433         dnl * This is provided in io-layer, but on windows it's only available
1434         dnl * on xp+
1435         AC_DEFINE(HAVE_GETPROCESSID, 1, [Define if GetProcessId is available])
1436 else
1437         jdk_headers_found=no
1438         AC_CHECK_LIB(ws2_32, main, LIBS="$LIBS -lws2_32", AC_ERROR(bad mingw install?))
1439         AC_CHECK_LIB(psapi, main, LIBS="$LIBS -lpsapi", AC_ERROR(bad mingw install?))
1440         AC_CHECK_LIB(ole32, main, LIBS="$LIBS -lole32", AC_ERROR(bad mingw install?))
1441         AC_CHECK_LIB(winmm, main, LIBS="$LIBS -lwinmm", AC_ERROR(bad mingw install?))
1442         AC_CHECK_LIB(oleaut32, main, LIBS="$LIBS -loleaut32", AC_ERROR(bad mingw install?))
1443         AC_CHECK_LIB(advapi32, main, LIBS="$LIBS -ladvapi32", AC_ERROR(bad mingw install?))
1444
1445         dnl *********************************
1446         dnl *** Check for struct ip_mreqn ***
1447         dnl *********************************
1448         AC_MSG_CHECKING(for struct ip_mreqn)
1449         AC_TRY_COMPILE([#include <ws2tcpip.h>], [
1450                 struct ip_mreqn mreq;
1451                 mreq.imr_address.s_addr = 0;
1452         ], [
1453                 # Yes, we have it...
1454                 AC_MSG_RESULT(yes)
1455                 AC_DEFINE(HAVE_STRUCT_IP_MREQN)
1456         ], [
1457                 # We'll just have to try and use struct ip_mreq
1458                 AC_MSG_RESULT(no)
1459                 AC_MSG_CHECKING(for struct ip_mreq)
1460                 AC_TRY_COMPILE([#include <ws2tcpip.h>], [
1461                         struct ip_mreq mreq;
1462                         mreq.imr_interface.s_addr = 0;
1463                 ], [
1464                         # Yes, we have it...
1465                         AC_MSG_RESULT(yes)
1466                         AC_DEFINE(HAVE_STRUCT_IP_MREQ)
1467                 ], [
1468                         # No multicast support
1469                         AC_MSG_RESULT(no)
1470                 ])
1471         ])
1472         AC_CHECK_FUNCS(GetProcessId)
1473 fi
1474
1475 dnl socklen_t check
1476 AC_MSG_CHECKING(for socklen_t)
1477 AC_TRY_COMPILE([
1478 #include <sys/types.h>
1479 #include <sys/socket.h>
1480 ],[
1481   socklen_t foo;
1482 ],[
1483 ac_cv_c_socklen_t=yes
1484         AC_DEFINE(HAVE_SOCKLEN_T)
1485         AC_MSG_RESULT(yes)
1486 ],[
1487         AC_MSG_RESULT(no)
1488 ])
1489
1490 AC_MSG_CHECKING(for array element initalizer support)
1491 AC_TRY_COMPILE([#include <sys/socket.h>], [
1492         const int array[] = {[1] = 2,};
1493 ], [
1494         # Yes, we have it...
1495         AC_MSG_RESULT(yes)
1496         AC_DEFINE(HAVE_ARRAY_ELEM_INIT,1,[Supports C99 array initialization])
1497 ], [
1498         # We'll have to use signals
1499         AC_MSG_RESULT(no)
1500 ])
1501
1502 AC_CHECK_FUNCS(trunc, , AC_MSG_CHECKING(for trunc in math.h)
1503         # Simply calling trunc (0.0) is no good since gcc will optimize the call away
1504         AC_TRY_LINK([#include <math.h>],
1505         [ static void *p = &trunc; ],
1506         [
1507                 AC_DEFINE(HAVE_TRUNC)
1508                 AC_MSG_RESULT(yes)
1509                 ac_cv_trunc=yes
1510         ],
1511         AC_MSG_RESULT(no)))
1512
1513 if test "x$ac_cv_truncl" != "xyes"; then
1514    AC_CHECK_LIB(sunmath, aintl, [ AC_DEFINE(HAVE_AINTL) LIBS="$LIBS -lsunmath"])
1515 fi
1516
1517 dnl ****************************
1518 dnl *** Look for /dev/random ***
1519 dnl ****************************
1520
1521 AC_MSG_CHECKING([if usage of random device is requested])
1522 AC_ARG_ENABLE(dev-random,
1523 [  --disable-dev-random    disable the use of the random device],
1524 try_dev_random=$enableval, try_dev_random=yes)
1525 AC_MSG_RESULT($try_dev_random)
1526
1527 case "{$target}" in
1528     *-openbsd*)
1529     NAME_DEV_RANDOM="/dev/srandom"
1530     ;;
1531
1532 dnl Win32 does not have /dev/random, they have their own method...
1533
1534     *-*-mingw*|*-*-cygwin*)
1535     ac_cv_have_dev_random=no
1536     ;;
1537
1538 dnl Everywhere else, it's /dev/random
1539
1540     *)
1541     NAME_DEV_RANDOM="/dev/random"
1542     ;;
1543 esac
1544
1545 AC_DEFINE_UNQUOTED(NAME_DEV_RANDOM, "$NAME_DEV_RANDOM")
1546
1547 dnl Now check if the device actually exists
1548
1549 if test "x$try_dev_random" = "xyes"; then
1550     AC_CACHE_CHECK(for random device, ac_cv_have_dev_random,
1551     [if test -r "$NAME_DEV_RANDOM" ; then
1552         ac_cv_have_dev_random=yes; else ac_cv_have_dev_random=no; fi])
1553     if test "x$ac_cv_have_dev_random" = "xyes"; then
1554         AC_DEFINE(HAVE_CRYPT_RNG)
1555     fi
1556 else
1557     AC_MSG_CHECKING(for random device)
1558     ac_cv_have_dev_random=no
1559     AC_MSG_RESULT(has been disabled)
1560 fi
1561
1562 if test "x$platform_win32" = "xyes"; then
1563     AC_DEFINE(HAVE_CRYPT_RNG)
1564 fi
1565
1566 if test "x$ac_cv_have_dev_random" = "xno" \
1567     && test "x$platform_win32" = "xno"; then
1568     AC_MSG_WARN([[
1569 ***
1570 *** A system-provided entropy source was not found on this system.
1571 *** Because of this, the System.Security.Cryptography random number generator
1572 *** will throw a NotImplemented exception.
1573 ***
1574 *** If you are seeing this message, and you know your system DOES have an
1575 *** entropy collection in place, please contact <crichton@gimp.org> and
1576 *** provide information about the system and how to access the random device.
1577 ***
1578 *** Otherwise you can install either egd or prngd and set the environment
1579 *** variable MONO_EGD_SOCKET to point to the daemon's socket to use that.
1580 ***]])
1581 fi
1582
1583 AC_MSG_CHECKING([if inter-process shared handles are requested])
1584 AC_ARG_ENABLE(shared-handles, [  --disable-shared-handles disable inter-process shared handles], try_shared_handles=$enableval, try_shared_handles=yes)
1585 AC_MSG_RESULT($try_shared_handles)
1586 if test "x$try_shared_handles" != "xyes"; then
1587         AC_DEFINE(DISABLE_SHARED_HANDLES)
1588         AC_SUBST(DISABLE_SHARED_HANDLES)
1589 fi
1590
1591 AC_ARG_ENABLE(nunit-tests, [ --enable-nunit-tests       Run the nunit tests of the class library on 'make check'])
1592 AM_CONDITIONAL(ENABLE_NUNIT_TESTS, [test x$enable_nunit_tests = xyes])
1593
1594 TARGET="unknown"
1595 ACCESS_UNALIGNED="yes"
1596
1597 JIT_SUPPORTED=no
1598 INTERP_SUPPORTED=no
1599 LIBC="libc.so.6"
1600 INTL="libc.so.6"
1601 SQLITE="libsqlite.so.0"
1602 SQLITE3="libsqlite3.so.0"
1603 X11="libX11.so"
1604
1605 jit_wanted=false
1606 interp_wanted=false
1607 case "$host" in
1608 #       mips-sgi-irix5.* | mips-sgi-irix6.*)
1609 #               TARGET=MIPS;
1610 #               ACCESS_UNALIGNED="no"
1611 #               ;;
1612         mips*)
1613                 TARGET=MIPS;
1614                 arch_target=mips;
1615                 ACCESS_UNALIGNED="no"
1616                 JIT_SUPPORTED=yes
1617                 jit_wanted=true
1618                 ;;
1619         i*86-*-*)
1620                 TARGET=X86;
1621                 arch_target=x86;
1622                 JIT_SUPPORTED=yes
1623                 jit_wanted=true
1624                 case $host_os in
1625                   solaris*)
1626                         LIBC="libc.so"
1627                         INTL="libintl.so"
1628                         if test "x$ac_cv_sizeof_void_p" = "x8"; then
1629                                 TARGET=AMD64
1630                                 arch_target=amd64
1631                         fi
1632
1633                         # On solaris 10 x86, gcc prints a warning saying 'visibility attribute not supported on this configuration; ignored', but linking fails. A test case:
1634                         # int astruct __attribute__ ((visibility ("hidden")));
1635                         # void foo ()
1636                         # {
1637                         #       void *p = &astruct;
1638                         # }
1639                         # gcc -fPIC --shared -o libfoo.so foo.c
1640                         # yields:
1641                         # foo.c:6: warning: visibility attribute not supported in this configuration; ignored
1642                         # ld: fatal: relocation error: R_386_GOTOFF: file /var/tmp//ccxYR96k.o: symbol astruct: relocation must bind locally
1643                         have_visibility_hidden=no
1644
1645                 esac
1646                 ;;
1647         x86_64-*-* | amd64-*-*)
1648                 TARGET=AMD64;
1649                 arch_target=amd64;
1650                 JIT_SUPPORTED=yes
1651                 jit_wanted=true
1652                 ;;
1653         ia64-*-*)
1654                 TARGET=IA64
1655                 arch_target=ia64
1656                 ACCESS_UNALIGNED="no"
1657                 JIT_SUPPORTED=yes
1658                 jit_wanted=true
1659                 LIBC="libc.so.6.1"
1660                 INTL="libc.so.6.1"
1661                 AC_CHECK_LIB(unwind, _U_dyn_register, [], [AC_MSG_ERROR(library libunwind not found)])
1662                 libmono_ldflags="-lunwind"
1663                 ;;
1664         sparc*-*-*)
1665                 if test "x$ac_cv_sizeof_void_p" = "x8"; then
1666                    TARGET=SPARC64
1667                 else
1668                         TARGET=SPARC
1669                 fi
1670                 arch_target=sparc;
1671                 JIT_SUPPORTED=yes
1672                 ACCESS_UNALIGNED="no"
1673                 case $host_os in
1674                   linux*) ;;
1675                   *)
1676                         LIBC="libc.so"
1677                         INTL="libintl.so"
1678                 esac
1679                 jit_wanted=true
1680                 if test x"$GCC" = xyes; then
1681                         # We don't support v8 cpus
1682                         CFLAGS="$CFLAGS -Wno-cast-align -mcpu=v9"
1683                 fi
1684                 if test x"$AR" = xfalse; then
1685                         AC_MSG_ERROR([The required utility 'ar' is not found in your PATH. Usually it can be found in /usr/ccs/bin.])
1686                 fi
1687                 ;;
1688        alpha*-*-linux* | alpha*-*-osf*)
1689                 TARGET=ALPHA;
1690                 ACCESS_UNALIGNED="no"
1691                 JIT_SUPPORTED=yes
1692                 jit_wanted=true
1693                 arch_target=alpha;
1694                 CFLAGS="$CFLAGS -mieee -O0"
1695                 case $host_os in
1696                   linux*)
1697                         LIBC="libc.so.6.1"
1698                         INTL="libc.so.6.1"
1699                 esac
1700                ;;
1701         *-*-mingw*|*-*-cygwin*)
1702                 # When this is enabled, it leads to very strange crashes at runtime (gcc-3.4.4)
1703                 have_visibility_hidden=no
1704                 INTL="intl"
1705                 ;;
1706         hppa2.0w-hp-hpux11.00 | hppa64-hp-hpux11.00)
1707                 TARGET=HPPA;
1708                 arch_target=hppa;
1709                 LIBC="libc.sl"
1710                 ACCESS_UNALIGNED="no"
1711                 INTERP_SUPPORTED=yes
1712                 interp_wanted=true
1713                 ;;
1714         hppa*linux*)
1715                 TARGET=HPPA;
1716                 AC_DEFINE(MONO_ARCH_REGPARMS,1,[Architecture uses registers for Parameters])
1717                 arch_target=hppa;
1718                 ACCESS_UNALIGNED="no"
1719                 JIT_SUPPORTED=yes
1720                 jit_wanted=true
1721                 ;;
1722         macppc-*-openbsd* | powerpc-*-linux* | powerpc-*-openbsd* | \
1723         powerpc-*-sysv* | powerpc-*-darwin*)
1724                 TARGET=POWERPC;
1725                 AC_DEFINE(MONO_ARCH_REGPARMS,1,[Architecture uses registers for Parameters])
1726                 arch_target=ppc;
1727                 JIT_SUPPORTED=yes
1728                 jit_wanted=true
1729                 ;;
1730         arm*-linux*)
1731                 TARGET=ARM;
1732                 arch_target=arm;
1733                 ACCESS_UNALIGNED="no"
1734                 JIT_SUPPORTED=yes
1735                 jit_wanted=true
1736                 ;;
1737         s390-*-linux*)
1738                 TARGET=S390;
1739                 AC_DEFINE(MONO_ARCH_REGPARMS,1,[Architecture uses registers for Parameters])
1740                 arch_target=s390;
1741                 ACCESS_UNALIGNED="no"
1742                 JIT_SUPPORTED=yes
1743                 jit_wanted=true
1744                 # Required CFLAGS for s390[x].  USE_STRING_INLINES is automatic with gcc 4.1
1745                 CFLAGS="$CFLAGS -mbackchain -D__USE_STRING_INLINES"
1746                 ;;
1747         s390x-*-linux*)
1748                 TARGET=S390x;
1749                 AC_DEFINE(MONO_ARCH_REGPARMS,1,[Architecture uses registers for Parameters])
1750                 arch_target=s390x;
1751                 ACCESS_UNALIGNED="no"
1752                 JIT_SUPPORTED=yes
1753                 jit_wanted=true
1754                 CFLAGS="$CFLAGS -mbackchain -D__USE_STRING_INLINES"
1755                 ;;
1756 esac
1757
1758 if test "x$have_visibility_hidden" = "xyes"; then
1759    AC_DEFINE(HAVE_VISIBILITY_HIDDEN, 1, [Support for the visibility ("hidden") attribute])
1760 fi
1761
1762 AC_ARG_WITH(jit, [  --with-jit=yes,no       If you want to build scripts that default to the JIT],[
1763         if test x$withval = xyes; then
1764            jit_wanted=true
1765         else
1766            jit_wanted=false
1767         fi
1768 ])
1769
1770 AC_ARG_WITH(interp, [  --with-interp=yes,no    If you want to build scripts that default to the interpreter],[
1771         if test x$withval = xyes; then
1772            interp_wanted=true
1773         else
1774            interp_wanted=false
1775         fi
1776 ])
1777
1778 USEJIT=false
1779 if test x$JIT_SUPPORTED = xyes; then
1780    if $jit_wanted; then
1781       USEJIT=true
1782       jit_status="Building and using the JIT"
1783    else
1784       if $interp_wanted; then
1785          jit_status="Building the JIT, defaulting to the interpreter"
1786       else
1787          AC_ERROR(No JIT or interpreter support available or selected.)
1788       fi
1789    fi
1790 else
1791    if test x$interp_wanted = xtrue; then
1792       jit_status="interpreter"
1793    else
1794       AC_ERROR(No JIT or interpreter support available or selected.)
1795    fi
1796 fi
1797
1798 AM_CONDITIONAL(USE_JIT, test x$USEJIT = xtrue)
1799
1800 libsuffix=".so"
1801
1802 case "$host" in
1803      *-*-darwin*)
1804         libsuffix=".dylib"
1805         LIBC="libc.dylib"
1806         INTL="libintl.dylib"
1807         SQLITE="libsqlite.0.dylib"
1808         SQLITE3="libsqlite3.0.dylib"
1809         X11="libX11.dylib"
1810         ;;
1811      *-*-*netbsd*)
1812         LIBC="libc.so.12"
1813         INTL="libintl.so.0"
1814         ;;
1815     *-*-*freebsd*)
1816         LIBC="libc.so"
1817         INTL="libintl.so"
1818         ;;
1819     *-*-*openbsd*)
1820         LIBC="libc.so"
1821         INTL="libintl.so"
1822         ;;
1823     *-*-*linux*)
1824         AC_PATH_X
1825         AC_MSG_CHECKING(for the soname of libX11.so)
1826         for i in $x_libraries /usr/lib /usr/lib64; do
1827                 for r in 4 5 6; do
1828                         if test -f $i/libX11.so.$r; then
1829                                 X11=libX11.so.$r
1830                                 AC_MSG_RESULT($X11)
1831                         fi
1832                 done
1833         done
1834
1835         if test "x$X11" = "xlibX11.so"; then
1836                 AC_MSG_WARN([Could not find X development libs. Do you have the -devel package installed? WinForms may not work...]);
1837         fi
1838         ;;
1839 esac
1840
1841
1842 AC_SUBST(libsuffix)
1843
1844 if test "x$TARGET" != "xAMD64"; then
1845    # valgrind headers don't compile under x86-64
1846    AC_CHECK_HEADERS(valgrind/memcheck.h)
1847 fi
1848
1849 if test "x$TARGET" = "xAMD64" -o "x$TARGET" = "xX86"; then
1850         if test "x$with_tls" = "x__thread"; then
1851                 #
1852                 # On some linux distributions, TLS works in executables, but linking
1853                 # against a shared library containing TLS fails with:
1854                 # undefined reference to `__tls_get_addr'
1855                 #
1856                 rm -f conftest.c conftest.so conftest
1857                 echo "static __thread int foo; void main () { foo = 5; }" > conftest.c
1858                 $CC -fPIC --shared -o conftest.so conftest.c > /dev/null 2>&1
1859                 $CC -o conftest conftest.so > /dev/null 2>&1
1860                 if test ! -f conftest; then
1861                    AC_MSG_WARN([Disabling usage of __thread.]);
1862                    with_tls=pthread
1863                 fi
1864                 rm -f conftest.c conftest.so conftest
1865         fi
1866 fi
1867
1868 mono_debugger_supported=no
1869 if test "x$TARGET" = "xAMD64" -o "x$TARGET" = "xX86" -o "x$TARGET" = "xALPHA"; then
1870         if test x$use_included_gc = xyes; then
1871                 case "$host" in
1872                 *-*-*linux*)
1873                         mono_debugger_supported=yes
1874                         ;;
1875                 esac
1876         fi
1877 fi
1878
1879 AC_MSG_CHECKING(if the Mono Debugger is supported on this platform)
1880 if test "x$mono_debugger_supported" = "xyes"; then
1881         AC_DEFINE(MONO_DEBUGGER_SUPPORTED,1,[The Mono Debugger is supported on this platform])
1882 fi
1883 AC_MSG_RESULT($mono_debugger_supported)
1884 AM_CONDITIONAL(MONO_DEBUGGER_SUPPORTED, test x$mono_debugger_supported = xyes)
1885
1886 if test "x$with_tls" = "x__thread"; then
1887         AC_DEFINE(HAVE_KW_THREAD)
1888         # Pass the information to libgc
1889         CPPFLAGS="$CPPFLAGS -DUSE_COMPILER_TLS"
1890         AC_MSG_CHECKING(if the tls_model attribute is supported)
1891         AC_TRY_COMPILE([static __thread int foo __attribute__((tls_model("initial-exec")));], [
1892                 ], [
1893                         AC_MSG_RESULT(yes)
1894                         AC_DEFINE(HAVE_TLS_MODEL_ATTR, 1, [tld_model available])
1895                 ], [
1896                         AC_MSG_RESULT(no)
1897         ])
1898 fi
1899
1900 if test ${TARGET} = ARM; then
1901         dnl ******************************************
1902         dnl *** Check to see what FPU is available ***
1903         dnl ******************************************
1904         AC_MSG_CHECKING(which FPU to use)
1905
1906         AC_TRY_COMPILE([], [
1907                 __asm__ ("ldfd f0, [r0]");
1908                 ], fpu=FPA, [
1909                         AC_TRY_COMPILE([], [
1910                                 __asm__ ("fldd d0, [r0]");
1911                         ], fpu=VFP, fpu=NONE)
1912                 ])
1913
1914         AC_MSG_RESULT($fpu)
1915         CPPFLAGS="$CPPFLAGS -DARM_FPU_$fpu=1"
1916         unset fpu
1917 fi
1918
1919 if test ${TARGET} = unknown; then
1920         CPPFLAGS="$CPPFLAGS -DNO_PORT"
1921         AC_MSG_WARN("mono has not been ported to $host: some things may not work.")
1922 fi
1923
1924 if test ${ACCESS_UNALIGNED} = no; then
1925         CPPFLAGS="$CPPFLAGS -DNO_UNALIGNED_ACCESS"
1926 fi
1927
1928 PREVIEW=yes
1929 AC_ARG_WITH(preview,  [ --with-preview=yes,no     If you want to install the 2.0 FX preview],[
1930         if test x$with_preview = xno; then
1931               PREVIEW=no
1932         fi
1933 ])
1934
1935 MOONLIGHT=no
1936 AC_ARG_WITH(moonlight,[ --with-moonlight=yes,no   If you want to build the Moonlight 2.1 assemblies],[
1937         if test x$with_moonlight = xyes; then
1938               MOONLIGHT=yes
1939         fi
1940 ])
1941
1942 libmono_ldflags="$libmono_ldflags $LIBS"
1943
1944 AM_CONDITIONAL(INSTALL_2_0, test x$PREVIEW = xyes)
1945 AM_CONDITIONAL(INSTALL_2_1, test x$MOONLIGHT = xyes)
1946
1947 AM_CONDITIONAL(MIPS_GCC, test ${TARGET}${ac_cv_prog_gcc} = MIPSyes)
1948 AM_CONDITIONAL(MIPS_SGI, test ${TARGET}${ac_cv_prog_gcc} = MIPSno)
1949 AM_CONDITIONAL(SPARC, test x$TARGET = xSPARC)
1950 AM_CONDITIONAL(SPARC64, test x$TARGET = xSPARC64)
1951 AM_CONDITIONAL(X86, test x$TARGET = xX86)
1952 AM_CONDITIONAL(AMD64, test x$TARGET = xAMD64)
1953 AM_CONDITIONAL(ALPHA, test x$TARGET = xALPHA)
1954 AM_CONDITIONAL(IA64, test x$TARGET = xIA64)
1955 AM_CONDITIONAL(M68K, test x$TARGET = xM68K)
1956 AM_CONDITIONAL(MIPS, test x$TARGET = xMIPS)
1957 AM_CONDITIONAL(POWERPC, test x$TARGET = xPOWERPC)
1958 AM_CONDITIONAL(ARM, test x$TARGET = xARM)
1959 AM_CONDITIONAL(S390, test x$TARGET = xS390)
1960 AM_CONDITIONAL(S390x, test x$TARGET = xS390x)
1961 AM_CONDITIONAL(HPPA, test x$TARGET = xHPPA)
1962
1963 AM_CONDITIONAL(JIT_SUPPORTED, test x$JIT_SUPPORTED = xyes)
1964 AM_CONDITIONAL(INTERP_SUPPORTED, test x$interp_wanted = xtrue)
1965 AM_CONDITIONAL(INCLUDED_LIBGC, test x$gc = xincluded)
1966
1967 AC_SUBST(LIBC)
1968 AC_SUBST(INTL)
1969 AC_SUBST(SQLITE)
1970 AC_SUBST(SQLITE3)
1971 AC_SUBST(X11)
1972 AC_DEFINE_UNQUOTED(ARCHITECTURE,"$arch_target",[The architecture this is running on])
1973 AC_SUBST(arch_target)
1974 AC_SUBST(CFLAGS)
1975 AC_SUBST(CPPFLAGS)
1976 AC_SUBST(LDFLAGS)
1977
1978 mono_build_root=`pwd`
1979 AC_SUBST(mono_build_root)
1980
1981 if test x$USEJIT = xtrue; then
1982   mono_runtime=mono/mini/mono
1983 else
1984   mono_runtime=mono/interpreter/mint
1985 fi
1986 AC_SUBST(mono_runtime)
1987
1988 mono_cfg_root=$mono_build_root/runtime
1989 if test x$platform_win32 = xyes; then
1990   mono_cfg_dir=`cygpath -w -a $mono_cfg_root`\\etc
1991 else
1992   mono_cfg_dir=$mono_cfg_root/etc
1993 fi
1994 AC_SUBST(mono_cfg_dir)
1995
1996 AC_CONFIG_FILES([runtime/mono-wrapper],[chmod +x runtime/mono-wrapper])
1997 AC_CONFIG_FILES([runtime/monodis-wrapper],[chmod +x runtime/monodis-wrapper])
1998 AC_CONFIG_FILES([runtime/semdel-wrapper],[chmod +x runtime/semdel-wrapper])
1999
2000 AC_CONFIG_COMMANDS([runtime/etc/mono/1.0/machine.config],
2001 [   depth=../../../..
2002     case $srcdir in
2003     [[\\/$]]* | ?:[[\\/]]* ) reldir=$srcdir ;;
2004     .) reldir=$depth ;;
2005     *) reldir=$depth/$srcdir ;;
2006     esac
2007     $ac_aux_dir/install-sh -d runtime/etc/mono/1.0
2008     cd runtime/etc/mono/1.0
2009     rm -f machine.config
2010     $LN_S $reldir/data/net_1_1/machine.config machine.config
2011     cd $depth
2012 ],[LN_S='$LN_S'])
2013
2014 AC_CONFIG_COMMANDS([runtime/etc/mono/2.0/machine.config],
2015 [   depth=../../../..
2016     case $srcdir in
2017     [[\\/$]]* | ?:[[\\/]]* ) reldir=$srcdir ;;
2018     .) reldir=$depth ;;
2019     *) reldir=$depth/$srcdir ;;
2020     esac
2021     $ac_aux_dir/install-sh -d runtime/etc/mono/2.0
2022     cd runtime/etc/mono/2.0
2023     rm -f machine.config
2024     $LN_S $reldir/data/net_2_0/machine.config machine.config
2025     cd $depth
2026 ],[LN_S='$LN_S'])
2027
2028 AC_CONFIG_COMMANDS([runtime/etc/mono/2.0/web.config],
2029 [   depth=../../../..
2030     case $srcdir in
2031     [[\\/$]]* | ?:[[\\/]]* ) reldir=$srcdir ;;
2032     .) reldir=$depth ;;
2033     *) reldir=$depth/$srcdir ;;
2034     esac
2035     $ac_aux_dir/install-sh -d runtime/etc/mono/2.0
2036     cd runtime/etc/mono/2.0
2037     rm -f web.config
2038     $LN_S $reldir/data/net_2_0/web.config web.config
2039     cd $depth
2040 ],[LN_S='$LN_S'])
2041
2042 AC_CONFIG_COMMANDS([runtime/etc/mono/browscap.ini],
2043 [   depth=../../..
2044     case $srcdir in
2045     [[\\/$]]* | ?:[[\\/]]* ) reldir=$srcdir ;;
2046     .) reldir=$depth ;;
2047     *) reldir=$depth/$srcdir ;;
2048     esac
2049     $ac_aux_dir/install-sh -d runtime/etc/mono/
2050     cd runtime/etc/mono/
2051     rm -f browscap.ini
2052     $LN_S $reldir/data/browscap.ini browscap.ini
2053     cd $depth
2054 ],[LN_S='$LN_S'])
2055
2056 AC_OUTPUT([
2057 Makefile
2058 mono-uninstalled.pc
2059 scripts/mono-nunit.pc
2060 scripts/mono-find-provides
2061 scripts/mono-find-requires
2062 mono/Makefile
2063 mono/utils/Makefile
2064 mono/metadata/Makefile
2065 mono/dis/Makefile
2066 mono/cil/Makefile
2067 mono/arch/Makefile
2068 mono/os/Makefile
2069 mono/arch/x86/Makefile
2070 mono/arch/amd64/Makefile
2071 mono/arch/hppa/Makefile
2072 mono/arch/ppc/Makefile
2073 mono/arch/sparc/Makefile
2074 mono/arch/s390/Makefile
2075 mono/arch/s390x/Makefile
2076 mono/arch/arm/Makefile
2077 mono/arch/alpha/Makefile
2078 mono/arch/ia64/Makefile
2079 mono/arch/mips/Makefile
2080 mono/interpreter/Makefile
2081 mono/tests/Makefile
2082 mono/tests/tests-config
2083 mono/tests/cas/Makefile
2084 mono/tests/cas/assembly/Makefile
2085 mono/tests/cas/demand/Makefile
2086 mono/tests/cas/inheritance/Makefile
2087 mono/tests/cas/linkdemand/Makefile
2088 mono/tests/cas/threads/Makefile
2089 mono/benchmark/Makefile
2090 mono/monoburg/Makefile
2091 mono/monograph/Makefile
2092 mono/io-layer/Makefile
2093 mono/mini/Makefile
2094 mono/profiler/Makefile
2095 ikvm-native/Makefile
2096 scripts/Makefile
2097 man/Makefile
2098 web/Makefile
2099 docs/Makefile
2100 data/Makefile
2101 data/net_1_1/Makefile
2102 data/net_2_0/Makefile
2103 data/mint.pc
2104 data/mono.pc
2105 data/mono-cairo.pc
2106 data/dotnet.pc
2107 data/cecil.pc
2108 samples/Makefile
2109 support/Makefile
2110 data/config
2111 tools/Makefile
2112 tools/locale-builder/Makefile
2113 runtime/Makefile
2114 msvc/Makefile
2115 ])
2116
2117 if test x$platform_win32 = xyes; then
2118    # Get rid of 'cyg' prefixes in library names
2119    sed -e "s/\/cyg\//\/\//" libtool > libtool.new; mv libtool.new libtool; chmod 755 libtool
2120    # libtool seems to inherit -mno-cygwin from our CFLAGS, and uses it to compile its executable
2121    # wrapper scripts which use exec(). gcc has no problem compiling+linking this, but the resulting
2122    # executable doesn't work...
2123    sed -e "s,-mno-cygwin,,g" libtool > libtool.new; mv libtool.new libtool; chmod 755 libtool
2124 fi
2125
2126 (
2127   case $prefix in
2128   NONE) prefix=$ac_default_prefix ;;
2129   esac
2130   case $exec_prefix in
2131   NONE) exec_prefix='${prefix}' ;;
2132   esac
2133
2134   test -w $srcdir/$mcsdir/build || chmod +w $srcdir/$mcsdir/build
2135
2136   #
2137   # If we are cross compiling, we don't build in the mcs/ tree.  Let us not clobber
2138   # any existing config.make.  This allows people to share the same source tree
2139   # with different build directories, one native and one cross
2140   #
2141   if test x$cross_compiling = xno && test x$enable_mcs_build != xno; then
2142     echo "prefix=$prefix" > $srcdir/$mcsdir/build/config.make
2143     echo "exec_prefix=$exec_prefix" >> $srcdir/$mcsdir/build/config.make
2144     echo 'mono_libdir=${exec_prefix}/lib' >> $srcdir/$mcsdir/build/config.make
2145     echo 'MCS_FLAGS = $(PLATFORM_DEBUG_FLAGS)' >> $srcdir/$mcsdir/build/config.make
2146     echo 'IL_FLAGS = /debug' >> $srcdir/$mcsdir/build/config.make
2147     echo "RUNTIME = $mono_build_root/runtime/mono-wrapper" >> $srcdir/$mcsdir/build/config.make
2148     echo "ILDISASM = $mono_build_root/runtime/monodis-wrapper" >> $srcdir/$mcsdir/build/config.make
2149
2150     case $INSTALL in
2151     [[\\/$]]* | ?:[[\\/]]* ) mcs_INSTALL=$INSTALL ;;
2152     *) mcs_INSTALL=$mono_build_root/$INSTALL ;;
2153     esac
2154
2155     echo "INSTALL = $mcs_INSTALL" >> $srcdir/$mcsdir/build/config.make
2156
2157     export VERSION
2158     [myver=$($AWK 'BEGIN {
2159       split (ENVIRON["VERSION"] ".0.0.0", vsplit, ".")
2160       print vsplit [1] "." vsplit [2] "." vsplit [3] "." vsplit [4]
2161     }')]
2162
2163     echo "MONO_VERSION = $myver" >> $srcdir/$mcsdir/build/config.make
2164   fi
2165 )
2166
2167 libgdiplus_msg=${libgdiplus_loc:-assumed to be installed}
2168
2169 echo "
2170         mcs source:  $mcs_topdir
2171         GC:          $gc
2172         TLS:         $with_tls
2173         SIGALTSTACK: $with_sigaltstack
2174         Engine:      $jit_status
2175         2.0 Beta:    $PREVIEW
2176         2.1 Alpha:   $MOONLIGHT
2177         JNI support: $jdk_headers_found
2178         libgdiplus:  $libgdiplus_msg
2179         zlib:        $zlib_msg
2180         $disabled
2181
2182 "
2183 if test x$with_static_mono = xno -a "x$platform_win32" != "xyes"; then
2184    AC_MSG_WARN(Turning off static Mono is a risk, you might run into unexepcted bugs)
2185 fi
2186
2187 if test x$gc = xsgen; then
2188         echo IMPORTANT:
2189         echo IMPORTANT: You have selected an experimental, work-in-progress
2190         echo IMPORTANT: GC engine.  This GC engine is currently not supported
2191         echo IMPORTANT: and is not yet ready for use.
2192         echo IMPORTANT:
2193         echo IMPORTANT: There are known problems with it, use at your own risk.
2194 fi