libltdl/m4/ltdl.m4

   1 # ltdl.m4 - Configure ltdl for the target system. -*-Autoconf-*-
   2 #
   3 #   Copyright (C) 1999-2006, 2007, 2008 Free Software Foundation, Inc.
   4 #   Written by Thomas Tanner, 1999
   5 #
   6 # This file is free software; the Free Software Foundation gives
   7 # unlimited permission to copy and/or distribute it, with or without
   8 # modifications, as long as this notice is preserved.
   9
  10 # serial 17 LTDL_INIT
  11
  12 # LT_CONFIG_LTDL_DIR(DIRECTORY, [LTDL-MODE])
  13 # ------------------------------------------
  14 # DIRECTORY contains the libltdl sources.  It is okay to call this
  15 # function multiple times, as long as the same DIRECTORY is always given.
  16 AC_DEFUN([LT_CONFIG_LTDL_DIR],
  17 [AC_BEFORE([$0], [LTDL_INIT])
  18 _$0($*)
  19 ])# LT_CONFIG_LTDL_DIR
  20
  21 # We break this out into a separate macro, so that we can call it safely
  22 # internally without being caught accidentally by the sed scan in libtoolize.
  23 m4_defun([_LT_CONFIG_LTDL_DIR],
  24 [dnl remove trailing slashes
  25 m4_pushdef([_ARG_DIR], m4_bpatsubst([$1], [/*$]))
  26 m4_case(_LTDL_DIR,
  27         [], [dnl only set lt_ltdl_dir if _ARG_DIR is not simply `.'
  28              m4_if(_ARG_DIR, [.],
  29                      [],
  30                  [m4_define([_LTDL_DIR], _ARG_DIR)
  31                   _LT_SHELL_INIT([lt_ltdl_dir=']_ARG_DIR['])])],
  32     [m4_if(_ARG_DIR, _LTDL_DIR,
  33             [],
  34         [m4_fatal([multiple libltdl directories: `]_LTDL_DIR[', `]_ARG_DIR['])])])
  35 m4_popdef([_ARG_DIR])
  36 ])# _LT_CONFIG_LTDL_DIR
  37
  38 # Initialise:
  39 m4_define([_LTDL_DIR], [])
  40
  41
  42 # _LT_BUILD_PREFIX
  43 # ----------------
  44 # If Autoconf is new enough, expand to `${top_build_prefix}', otherwise
  45 # to `${top_builddir}/'.
  46 m4_define([_LT_BUILD_PREFIX],
  47 [m4_ifdef([AC_AUTOCONF_VERSION],
  48    [m4_if(m4_version_compare(m4_defn([AC_AUTOCONF_VERSION]), [2.62]),
  49           [-1], [m4_ifdef([_AC_HAVE_TOP_BUILD_PREFIX],
  50                           [${top_build_prefix}],
  51                           [${top_builddir}/])],
  52           [${top_build_prefix}])],
  53    [${top_builddir}/])[]dnl
  54 ])
  55
  56
  57 # LTDL_CONVENIENCE
  58 # ----------------
  59 # sets LIBLTDL to the link flags for the libltdl convenience library and
  60 # LTDLINCL to the include flags for the libltdl header and adds
  61 # --enable-ltdl-convenience to the configure arguments.  Note that
  62 # AC_CONFIG_SUBDIRS is not called here.  LIBLTDL will be prefixed with
  63 # '${top_build_prefix}' if available, otherwise with '${top_builddir}/',
  64 # and LTDLINCL will be prefixed with '${top_srcdir}/' (note the single
  65 # quotes!).  If your package is not flat and you're not using automake,
  66 # define top_build_prefix, top_builddir, and top_srcdir appropriately
  67 # in your Makefiles.
  68 AC_DEFUN([LTDL_CONVENIENCE],
  69 [AC_BEFORE([$0], [LTDL_INIT])dnl
  70 dnl Although the argument is deprecated and no longer documented,
  71 dnl LTDL_CONVENIENCE used to take a DIRECTORY orgument, if we have one
  72 dnl here make sure it is the same as any other declaration of libltdl's
  73 dnl location!  This also ensures lt_ltdl_dir is set when configure.ac is
  74 dnl not yet using an explicit LT_CONFIG_LTDL_DIR.
  75 m4_ifval([$1], [_LT_CONFIG_LTDL_DIR([$1])])dnl
  76 _$0()
  77 ])# LTDL_CONVENIENCE
  78
  79 # AC_LIBLTDL_CONVENIENCE accepted a directory argument in older libtools,
  80 # now we have LT_CONFIG_LTDL_DIR:
  81 AU_DEFUN([AC_LIBLTDL_CONVENIENCE],
  82 [_LT_CONFIG_LTDL_DIR([m4_default([$1], [libltdl])])
  83 _LTDL_CONVENIENCE])
  84
  85 dnl aclocal-1.4 backwards compatibility:
  86 dnl AC_DEFUN([AC_LIBLTDL_CONVENIENCE], [])
  87
  88
  89 # _LTDL_CONVENIENCE
  90 # -----------------
  91 # Code shared by LTDL_CONVENIENCE and LTDL_INIT([convenience]).
  92 m4_defun([_LTDL_CONVENIENCE],
  93 [case $enable_ltdl_convenience in
  94   no) AC_MSG_ERROR([this package needs a convenience libltdl]) ;;
  95   "") enable_ltdl_convenience=yes
  96       ac_configure_args="$ac_configure_args --enable-ltdl-convenience" ;;
  97 esac
  98 LIBLTDL='_LT_BUILD_PREFIX'"${lt_ltdl_dir+$lt_ltdl_dir/}libltdlc.la"
  99 LTDLDEPS=$LIBLTDL
 100 LTDLINCL='-I${top_srcdir}'"${lt_ltdl_dir+/$lt_ltdl_dir}"
 101
 102 AC_SUBST([LIBLTDL])
 103 AC_SUBST([LTDLDEPS])
 104 AC_SUBST([LTDLINCL])
 105
 106 # For backwards non-gettext consistent compatibility...
 107 INCLTDL="$LTDLINCL"
 108 AC_SUBST([INCLTDL])
 109 ])# _LTDL_CONVENIENCE
 110
 111
 112 # LTDL_INSTALLABLE
 113 # ----------------
 114 # sets LIBLTDL to the link flags for the libltdl installable library
 115 # and LTDLINCL to the include flags for the libltdl header and adds
 116 # --enable-ltdl-install to the configure arguments.  Note that
 117 # AC_CONFIG_SUBDIRS is not called from here.  If an installed libltdl
 118 # is not found, LIBLTDL will be prefixed with '${top_build_prefix}' if
 119 # available, otherwise with '${top_builddir}/', and LTDLINCL will be
 120 # prefixed with '${top_srcdir}/' (note the single quotes!).  If your
 121 # package is not flat and you're not using automake, define top_build_prefix,
 122 # top_builddir, and top_srcdir appropriately in your Makefiles.
 123 # In the future, this macro may have to be called after LT_INIT.
 124 AC_DEFUN([LTDL_INSTALLABLE],
 125 [AC_BEFORE([$0], [LTDL_INIT])dnl
 126 dnl Although the argument is deprecated and no longer documented,
 127 dnl LTDL_INSTALLABLE used to take a DIRECTORY orgument, if we have one
 128 dnl here make sure it is the same as any other declaration of libltdl's
 129 dnl location!  This also ensures lt_ltdl_dir is set when configure.ac is
 130 dnl not yet using an explicit LT_CONFIG_LTDL_DIR.
 131 m4_ifval([$1], [_LT_CONFIG_LTDL_DIR([$1])])dnl
 132 _$0()
 133 ])# LTDL_INSTALLABLE
 134
 135 # AC_LIBLTDL_INSTALLABLE accepted a directory argument in older libtools,
 136 # now we have LT_CONFIG_LTDL_DIR:
 137 AU_DEFUN([AC_LIBLTDL_INSTALLABLE],
 138 [_LT_CONFIG_LTDL_DIR([m4_default([$1], [libltdl])])
 139 _LTDL_INSTALLABLE])
 140
 141 dnl aclocal-1.4 backwards compatibility:
 142 dnl AC_DEFUN([AC_LIBLTDL_INSTALLABLE], [])
 143
 144
 145 # _LTDL_INSTALLABLE
 146 # -----------------
 147 # Code shared by LTDL_INSTALLABLE and LTDL_INIT([installable]).
 148 m4_defun([_LTDL_INSTALLABLE],
 149 [if test -f $prefix/lib/libltdl.la; then
 150   lt_save_LDFLAGS="$LDFLAGS"
 151   LDFLAGS="-L$prefix/lib $LDFLAGS"
 152   AC_CHECK_LIB([ltdl], [lt_dlinit], [lt_lib_ltdl=yes])
 153   LDFLAGS="$lt_save_LDFLAGS"
 154   if test x"${lt_lib_ltdl-no}" = xyes; then
 155     if test x"$enable_ltdl_install" != xyes; then
 156       # Don't overwrite $prefix/lib/libltdl.la without --enable-ltdl-install
 157       AC_MSG_WARN([not overwriting libltdl at $prefix, force with `--enable-ltdl-install'])
 158       enable_ltdl_install=no
 159     fi
 160   elif test x"$enable_ltdl_install" = xno; then
 161     AC_MSG_WARN([libltdl not installed, but installation disabled])
 162   fi
 163 fi
 164
 165 # If configure.ac declared an installable ltdl, and the user didn't override
 166 # with --disable-ltdl-install, we will install the shipped libltdl.
 167 case $enable_ltdl_install in
 168   no) ac_configure_args="$ac_configure_args --enable-ltdl-install=no"
 169       LIBLTDL="-lltdl"
 170       LTDLDEPS=
 171       LTDLINCL=
 172       ;;
 173   *)  enable_ltdl_install=yes
 174       ac_configure_args="$ac_configure_args --enable-ltdl-install"
 175       LIBLTDL='_LT_BUILD_PREFIX'"${lt_ltdl_dir+$lt_ltdl_dir/}libltdl.la"
 176       LTDLDEPS=$LIBLTDL
 177       LTDLINCL='-I${top_srcdir}'"${lt_ltdl_dir+/$lt_ltdl_dir}"
 178       ;;
 179 esac
 180
 181 AC_SUBST([LIBLTDL])
 182 AC_SUBST([LTDLDEPS])
 183 AC_SUBST([LTDLINCL])
 184
 185 # For backwards non-gettext consistent compatibility...
 186 INCLTDL="$LTDLINCL"
 187 AC_SUBST([INCLTDL])
 188 ])# LTDL_INSTALLABLE
 189
 190
 191 # _LTDL_MODE_DISPATCH
 192 # -------------------
 193 m4_define([_LTDL_MODE_DISPATCH],
 194 [dnl If _LTDL_DIR is `.', then we are configuring libltdl itself:
 195 m4_if(_LTDL_DIR, [],
 196         [],
 197     dnl if _LTDL_MODE was not set already, the default value is `subproject':
 198     [m4_case(m4_default(_LTDL_MODE, [subproject]),
 199           [subproject], [AC_CONFIG_SUBDIRS(_LTDL_DIR)
 200                           _LT_SHELL_INIT([lt_dlopen_dir="$lt_ltdl_dir"])],
 201           [nonrecursive], [_LT_SHELL_INIT([lt_dlopen_dir="$lt_ltdl_dir"; lt_libobj_prefix="$lt_ltdl_dir/"])],
 202           [recursive], [],
 203         [m4_fatal([unknown libltdl mode: ]_LTDL_MODE)])])dnl
 204 dnl Be careful not to expand twice:
 205 m4_define([$0], [])
 206 ])# _LTDL_MODE_DISPATCH
 207
 208
 209 # _LT_LIBOBJ(MODULE_NAME)
 210 # -----------------------
 211 # Like AC_LIBOBJ, except that MODULE_NAME goes into _LT_LIBOBJS instead
 212 # of into LIBOBJS.
 213 AC_DEFUN([_LT_LIBOBJ], [
 214   m4_pattern_allow([^_LT_LIBOBJS$])
 215   _LT_LIBOBJS="$_LT_LIBOBJS $1.$ac_objext"
 216 ])# _LT_LIBOBJS
 217
 218
 219 # LTDL_INIT([OPTIONS])
 220 # --------------------
 221 # Clients of libltdl can use this macro to allow the installer to
 222 # choose between a shipped copy of the ltdl sources or a preinstalled
 223 # version of the library.  If the shipped ltdl sources are not in a
 224 # subdirectory named libltdl, the directory name must be given by
 225 # LT_CONFIG_LTDL_DIR.
 226 AC_DEFUN([LTDL_INIT],
 227 [dnl Parse OPTIONS
 228 _LT_SET_OPTIONS([$0], [$1])
 229
 230 dnl We need to keep our own list of libobjs separate from our parent project,
 231 dnl and the easiest way to do that is redefine the AC_LIBOBJs macro while
 232 dnl we look for our own LIBOBJs.
 233 m4_pushdef([AC_LIBOBJ], m4_defn([_LT_LIBOBJ]))
 234 m4_pushdef([AC_LIBSOURCES])
 235
 236 dnl If not otherwise defined, default to the 1.5.x compatible subproject mode:
 237 m4_if(_LTDL_MODE, [],
 238         [m4_define([_LTDL_MODE], m4_default([$2], [subproject]))
 239         m4_if([-1], [m4_bregexp(_LTDL_MODE, [\(subproject\|\(non\)?recursive\)])],
 240                 [m4_fatal([unknown libltdl mode: ]_LTDL_MODE)])])
 241
 242 AC_ARG_WITH([included_ltdl],
 243     [AS_HELP_STRING([--with-included-ltdl],
 244                     [use the GNU ltdl sources included here])])
 245
 246 if test "x$with_included_ltdl" != xyes; then
 247   # We are not being forced to use the included libltdl sources, so
 248   # decide whether there is a useful installed version we can use.
 249   AC_CHECK_HEADER([ltdl.h],
 250       [AC_CHECK_DECL([lt_dlinterface_register],
 251            [AC_CHECK_LIB([ltdl], [lt_dladvise_preload],
 252                [with_included_ltdl=no],
 253                [with_included_ltdl=yes])],
 254            [with_included_ltdl=yes],
 255            [AC_INCLUDES_DEFAULT
 256             #include <ltdl.h>])],
 257       [with_included_ltdl=yes],
 258       [AC_INCLUDES_DEFAULT]
 259   )
 260 fi
 261
 262 dnl If neither LT_CONFIG_LTDL_DIR, LTDL_CONVENIENCE nor LTDL_INSTALLABLE
 263 dnl was called yet, then for old times' sake, we assume libltdl is in an
 264 dnl eponymous directory:
 265 AC_PROVIDE_IFELSE([LT_CONFIG_LTDL_DIR], [], [_LT_CONFIG_LTDL_DIR([libltdl])])
 266
 267 AC_ARG_WITH([ltdl_include],
 268     [AS_HELP_STRING([--with-ltdl-include=DIR],
 269                     [use the ltdl headers installed in DIR])])
 270
 271 if test -n "$with_ltdl_include"; then
 272   if test -f "$with_ltdl_include/ltdl.h"; then :
 273   else
 274     AC_MSG_ERROR([invalid ltdl include directory: `$with_ltdl_include'])
 275   fi
 276 else
 277   with_ltdl_include=no
 278 fi
 279
 280 AC_ARG_WITH([ltdl_lib],
 281     [AS_HELP_STRING([--with-ltdl-lib=DIR],
 282                     [use the libltdl.la installed in DIR])])
 283
 284 if test -n "$with_ltdl_lib"; then
 285   if test -f "$with_ltdl_lib/libltdl.la"; then :
 286   else
 287     AC_MSG_ERROR([invalid ltdl library directory: `$with_ltdl_lib'])
 288   fi
 289 else
 290   with_ltdl_lib=no
 291 fi
 292
 293 case ,$with_included_ltdl,$with_ltdl_include,$with_ltdl_lib, in
 294   ,yes,no,no,)
 295         m4_case(m4_default(_LTDL_TYPE, [convenience]),
 296             [convenience], [_LTDL_CONVENIENCE],
 297             [installable], [_LTDL_INSTALLABLE],
 298           [m4_fatal([unknown libltdl build type: ]_LTDL_TYPE)])
 299         ;;
 300   ,no,no,no,)
 301         # If the included ltdl is not to be used, then use the
 302         # preinstalled libltdl we found.
 303         AC_DEFINE([HAVE_LTDL], [1],
 304           [Define this if a modern libltdl is already installed])
 305         LIBLTDL=-lltdl
 306         LTDLDEPS=
 307         LTDLINCL=
 308         ;;
 309   ,no*,no,*)
 310         AC_MSG_ERROR([`--with-ltdl-include' and `--with-ltdl-lib' options must be used together])
 311         ;;
 312   *)    with_included_ltdl=no
 313         LIBLTDL="-L$with_ltdl_lib -lltdl"
 314         LTDLDEPS=
 315         LTDLINCL="-I$with_ltdl_include"
 316         ;;
 317 esac
 318 INCLTDL="$LTDLINCL"
 319
 320 # Report our decision...
 321 AC_MSG_CHECKING([where to find libltdl headers])
 322 AC_MSG_RESULT([$LTDLINCL])
 323 AC_MSG_CHECKING([where to find libltdl library])
 324 AC_MSG_RESULT([$LIBLTDL])
 325
 326 _LTDL_SETUP
 327
 328 dnl restore autoconf definition.
 329 m4_popdef([AC_LIBOBJ])
 330 m4_popdef([AC_LIBSOURCES])
 331
 332 AC_CONFIG_COMMANDS_PRE([
 333     _ltdl_libobjs=
 334     _ltdl_ltlibobjs=
 335     if test -n "$_LT_LIBOBJS"; then
 336       # Remove the extension.
 337       _lt_sed_drop_objext='s/\.o$//;s/\.obj$//'
 338       for i in `for i in $_LT_LIBOBJS; do echo "$i"; done | sed "$_lt_sed_drop_objext" | sort -u`; do
 339         _ltdl_libobjs="$_ltdl_libobjs $lt_libobj_prefix$i.$ac_objext"
 340         _ltdl_ltlibobjs="$_ltdl_ltlibobjs $lt_libobj_prefix$i.lo"
 341       done
 342     fi
 343     AC_SUBST([ltdl_LIBOBJS], [$_ltdl_libobjs])
 344     AC_SUBST([ltdl_LTLIBOBJS], [$_ltdl_ltlibobjs])
 345 ])
 346
 347 # Only expand once:
 348 m4_define([LTDL_INIT])
 349 ])# LTDL_INIT
 350
 351 # Old names:
 352 AU_DEFUN([AC_LIB_LTDL], [LTDL_INIT($@)])
 353 AU_DEFUN([AC_WITH_LTDL], [LTDL_INIT($@)])
 354 AU_DEFUN([LT_WITH_LTDL], [LTDL_INIT($@)])
 355 dnl aclocal-1.4 backwards compatibility:
 356 dnl AC_DEFUN([AC_LIB_LTDL], [])
 357 dnl AC_DEFUN([AC_WITH_LTDL], [])
 358 dnl AC_DEFUN([LT_WITH_LTDL], [])
 359
 360
 361 # _LTDL_SETUP
 362 # -----------
 363 # Perform all the checks necessary for compilation of the ltdl objects
 364 #  -- including compiler checks and header checks.  This is a public
 365 # interface  mainly for the benefit of libltdl's own configure.ac, most
 366 # other users should call LTDL_INIT instead.
 367 AC_DEFUN([_LTDL_SETUP],
 368 [AC_REQUIRE([AC_PROG_CC])dnl
 369 AC_REQUIRE([LT_SYS_MODULE_EXT])dnl
 370 AC_REQUIRE([LT_SYS_MODULE_PATH])dnl
 371 AC_REQUIRE([LT_SYS_DLSEARCH_PATH])dnl
 372 AC_REQUIRE([LT_LIB_DLLOAD])dnl
 373 AC_REQUIRE([LT_SYS_SYMBOL_USCORE])dnl
 374 AC_REQUIRE([LT_FUNC_DLSYM_USCORE])dnl
 375 AC_REQUIRE([LT_SYS_DLOPEN_DEPLIBS])dnl
 376 AC_REQUIRE([gl_FUNC_ARGZ])dnl
 377
 378 m4_require([_LT_CHECK_OBJDIR])dnl
 379 m4_require([_LT_HEADER_DLFCN])dnl
 380 m4_require([_LT_CHECK_DLPREOPEN])dnl
 381 m4_require([_LT_DECL_SED])dnl
 382
 383 dnl Don't require this, or it will be expanded earlier than the code
 384 dnl that sets the variables it relies on:
 385 _LT_ENABLE_INSTALL
 386
 387 dnl _LTDL_MODE specific code must be called at least once:
 388 _LTDL_MODE_DISPATCH
 389
 390 # In order that ltdl.c can compile, find out the first AC_CONFIG_HEADERS
 391 # the user used.  This is so that ltdl.h can pick up the parent projects
 392 # config.h file, The first file in AC_CONFIG_HEADERS must contain the
 393 # definitions required by ltdl.c.
 394 # FIXME: Remove use of undocumented AC_LIST_HEADERS (2.59 compatibility).
 395 AC_CONFIG_COMMANDS_PRE([dnl
 396 m4_pattern_allow([^LT_CONFIG_H$])dnl
 397 m4_ifset([AH_HEADER],
 398     [LT_CONFIG_H=AH_HEADER],
 399     [m4_ifset([AC_LIST_HEADERS],
 400             [LT_CONFIG_H=`echo "AC_LIST_HEADERS" | $SED 's,^[[      ]]*,,;s,[[ :]].*$,,'`],
 401         [])])])
 402 AC_SUBST([LT_CONFIG_H])
 403
 404 AC_CHECK_HEADERS([unistd.h dl.h sys/dl.h dld.h mach-o/dyld.h dirent.h],
 405         [], [], [AC_INCLUDES_DEFAULT])
 406
 407 AC_CHECK_FUNCS([closedir opendir readdir], [], [AC_LIBOBJ([lt__dirent])])
 408 AC_CHECK_FUNCS([strlcat strlcpy], [], [AC_LIBOBJ([lt__strl])])
 409
 410 AC_DEFINE_UNQUOTED([LT_LIBEXT],["$libext"],[The archive extension])
 411
 412 name=ltdl
 413 LTDLOPEN=`eval "\\$ECHO \"$libname_spec\""`
 414 AC_SUBST([LTDLOPEN])
 415 ])# _LTDL_SETUP
 416
 417
 418 # _LT_ENABLE_INSTALL
 419 # ------------------
 420 m4_define([_LT_ENABLE_INSTALL],
 421 [AC_ARG_ENABLE([ltdl-install],
 422     [AS_HELP_STRING([--enable-ltdl-install], [install libltdl])])
 423
 424 case ,${enable_ltdl_install},${enable_ltdl_convenience} in
 425   *yes*) ;;
 426   *) enable_ltdl_convenience=yes ;;
 427 esac
 428
 429 m4_ifdef([AM_CONDITIONAL],
 430 [AM_CONDITIONAL(INSTALL_LTDL, test x"${enable_ltdl_install-no}" != xno)
 431  AM_CONDITIONAL(CONVENIENCE_LTDL, test x"${enable_ltdl_convenience-no}" != xno)])
 432 ])# _LT_ENABLE_INSTALL
 433
 434
 435 # LT_SYS_DLOPEN_DEPLIBS
 436 # ---------------------
 437 AC_DEFUN([LT_SYS_DLOPEN_DEPLIBS],
 438 [AC_REQUIRE([AC_CANONICAL_HOST])dnl
 439 AC_CACHE_CHECK([whether deplibs are loaded by dlopen],
 440   [lt_cv_sys_dlopen_deplibs],
 441   [# PORTME does your system automatically load deplibs for dlopen?
 442   # or its logical equivalent (e.g. shl_load for HP-UX < 11)
 443   # For now, we just catch OSes we know something about -- in the
 444   # future, we'll try test this programmatically.
 445   lt_cv_sys_dlopen_deplibs=unknown
 446   case $host_os in
 447   aix3*|aix4.1.*|aix4.2.*)
 448     # Unknown whether this is true for these versions of AIX, but
 449     # we want this `case' here to explicitly catch those versions.
 450     lt_cv_sys_dlopen_deplibs=unknown
 451     ;;
 452   aix[[4-9]]*)
 453     lt_cv_sys_dlopen_deplibs=yes
 454     ;;
 455   amigaos*)
 456     case $host_cpu in
 457     powerpc)
 458       lt_cv_sys_dlopen_deplibs=no
 459       ;;
 460     esac
 461     ;;
 462   darwin*)
 463     # Assuming the user has installed a libdl from somewhere, this is true
 464     # If you are looking for one http://www.opendarwin.org/projects/dlcompat
 465     lt_cv_sys_dlopen_deplibs=yes
 466     ;;
 467   freebsd* | dragonfly*)
 468     lt_cv_sys_dlopen_deplibs=yes
 469     ;;
 470   gnu* | linux* | k*bsd*-gnu)
 471     # GNU and its variants, using gnu ld.so (Glibc)
 472     lt_cv_sys_dlopen_deplibs=yes
 473     ;;
 474   hpux10*|hpux11*)
 475     lt_cv_sys_dlopen_deplibs=yes
 476     ;;
 477   interix*)
 478     lt_cv_sys_dlopen_deplibs=yes
 479     ;;
 480   irix[[12345]]*|irix6.[[01]]*)
 481     # Catch all versions of IRIX before 6.2, and indicate that we don't
 482     # know how it worked for any of those versions.
 483     lt_cv_sys_dlopen_deplibs=unknown
 484     ;;
 485   irix*)
 486     # The case above catches anything before 6.2, and it's known that
 487     # at 6.2 and later dlopen does load deplibs.
 488     lt_cv_sys_dlopen_deplibs=yes
 489     ;;
 490   netbsd*)
 491     lt_cv_sys_dlopen_deplibs=yes
 492     ;;
 493   openbsd*)
 494     lt_cv_sys_dlopen_deplibs=yes
 495     ;;
 496   osf[[1234]]*)
 497     # dlopen did load deplibs (at least at 4.x), but until the 5.x series,
 498     # it did *not* use an RPATH in a shared library to find objects the
 499     # library depends on, so we explicitly say `no'.
 500     lt_cv_sys_dlopen_deplibs=no
 501     ;;
 502   osf5.0|osf5.0a|osf5.1)
 503     # dlopen *does* load deplibs and with the right loader patch applied
 504     # it even uses RPATH in a shared library to search for shared objects
 505     # that the library depends on, but there's no easy way to know if that
 506     # patch is installed.  Since this is the case, all we can really
 507     # say is unknown -- it depends on the patch being installed.  If
 508     # it is, this changes to `yes'.  Without it, it would be `no'.
 509     lt_cv_sys_dlopen_deplibs=unknown
 510     ;;
 511   osf*)
 512     # the two cases above should catch all versions of osf <= 5.1.  Read
 513     # the comments above for what we know about them.
 514     # At > 5.1, deplibs are loaded *and* any RPATH in a shared library
 515     # is used to find them so we can finally say `yes'.
 516     lt_cv_sys_dlopen_deplibs=yes
 517     ;;
 518   qnx*)
 519     lt_cv_sys_dlopen_deplibs=yes
 520     ;;
 521   solaris*)
 522     lt_cv_sys_dlopen_deplibs=yes
 523     ;;
 524   sysv5* | sco3.2v5* | sco5v6* | unixware* | OpenUNIX* | sysv4*uw2*)
 525     libltdl_cv_sys_dlopen_deplibs=yes
 526     ;;
 527   esac
 528   ])
 529 if test "$lt_cv_sys_dlopen_deplibs" != yes; then
 530  AC_DEFINE([LTDL_DLOPEN_DEPLIBS], [1],
 531     [Define if the OS needs help to load dependent libraries for dlopen().])
 532 fi
 533 ])# LT_SYS_DLOPEN_DEPLIBS
 534
 535 # Old name:
 536 AU_ALIAS([AC_LTDL_SYS_DLOPEN_DEPLIBS], [LT_SYS_DLOPEN_DEPLIBS])
 537 dnl aclocal-1.4 backwards compatibility:
 538 dnl AC_DEFUN([AC_LTDL_SYS_DLOPEN_DEPLIBS], [])
 539
 540
 541 # LT_SYS_MODULE_EXT
 542 # -----------------
 543 AC_DEFUN([LT_SYS_MODULE_EXT],
 544 [m4_require([_LT_SYS_DYNAMIC_LINKER])dnl
 545 AC_CACHE_CHECK([which extension is used for runtime loadable modules],
 546   [libltdl_cv_shlibext],
 547 [
 548 module=yes
 549 eval libltdl_cv_shlibext=$shrext_cmds
 550   ])
 551 if test -n "$libltdl_cv_shlibext"; then
 552   m4_pattern_allow([LT_MODULE_EXT])dnl
 553   AC_DEFINE_UNQUOTED([LT_MODULE_EXT], ["$libltdl_cv_shlibext"],
 554     [Define to the extension used for runtime loadable modules, say, ".so".])
 555 fi
 556 ])# LT_SYS_MODULE_EXT
 557
 558 # Old name:
 559 AU_ALIAS([AC_LTDL_SHLIBEXT], [LT_SYS_MODULE_EXT])
 560 dnl aclocal-1.4 backwards compatibility:
 561 dnl AC_DEFUN([AC_LTDL_SHLIBEXT], [])
 562
 563
 564 # LT_SYS_MODULE_PATH
 565 # ------------------
 566 AC_DEFUN([LT_SYS_MODULE_PATH],
 567 [m4_require([_LT_SYS_DYNAMIC_LINKER])dnl
 568 AC_CACHE_CHECK([which variable specifies run-time module search path],
 569   [lt_cv_module_path_var], [lt_cv_module_path_var="$shlibpath_var"])
 570 if test -n "$lt_cv_module_path_var"; then
 571   m4_pattern_allow([LT_MODULE_PATH_VAR])dnl
 572   AC_DEFINE_UNQUOTED([LT_MODULE_PATH_VAR], ["$lt_cv_module_path_var"],
 573     [Define to the name of the environment variable that determines the run-time module search path.])
 574 fi
 575 ])# LT_SYS_MODULE_PATH
 576
 577 # Old name:
 578 AU_ALIAS([AC_LTDL_SHLIBPATH], [LT_SYS_MODULE_PATH])
 579 dnl aclocal-1.4 backwards compatibility:
 580 dnl AC_DEFUN([AC_LTDL_SHLIBPATH], [])
 581
 582
 583 # LT_SYS_DLSEARCH_PATH
 584 # --------------------
 585 AC_DEFUN([LT_SYS_DLSEARCH_PATH],
 586 [m4_require([_LT_SYS_DYNAMIC_LINKER])dnl
 587 AC_CACHE_CHECK([for the default library search path],
 588   [lt_cv_sys_dlsearch_path],
 589   [lt_cv_sys_dlsearch_path="$sys_lib_dlsearch_path_spec"])
 590 if test -n "$lt_cv_sys_dlsearch_path"; then
 591   sys_dlsearch_path=
 592   for dir in $lt_cv_sys_dlsearch_path; do
 593     if test -z "$sys_dlsearch_path"; then
 594       sys_dlsearch_path="$dir"
 595     else
 596       sys_dlsearch_path="$sys_dlsearch_path$PATH_SEPARATOR$dir"
 597     fi
 598   done
 599   m4_pattern_allow([LT_DLSEARCH_PATH])dnl
 600   AC_DEFINE_UNQUOTED([LT_DLSEARCH_PATH], ["$sys_dlsearch_path"],
 601     [Define to the system default library search path.])
 602 fi
 603 ])# LT_SYS_DLSEARCH_PATH
 604
 605 # Old name:
 606 AU_ALIAS([AC_LTDL_SYSSEARCHPATH], [LT_SYS_DLSEARCH_PATH])
 607 dnl aclocal-1.4 backwards compatibility:
 608 dnl AC_DEFUN([AC_LTDL_SYSSEARCHPATH], [])
 609
 610
 611 # _LT_CHECK_DLPREOPEN
 612 # -------------------
 613 m4_defun([_LT_CHECK_DLPREOPEN],
 614 [m4_require([_LT_CMD_GLOBAL_SYMBOLS])dnl
 615 AC_CACHE_CHECK([whether libtool supports -dlopen/-dlpreopen],
 616   [libltdl_cv_preloaded_symbols],
 617   [if test -n "$lt_cv_sys_global_symbol_pipe"; then
 618     libltdl_cv_preloaded_symbols=yes
 619   else
 620     libltdl_cv_preloaded_symbols=no
 621   fi
 622   ])
 623 if test x"$libltdl_cv_preloaded_symbols" = xyes; then
 624   AC_DEFINE([HAVE_PRELOADED_SYMBOLS], [1],
 625     [Define if libtool can extract symbol lists from object files.])
 626 fi
 627 ])# _LT_CHECK_DLPREOPEN
 628
 629
 630 # LT_LIB_DLLOAD
 631 # -------------
 632 AC_DEFUN([LT_LIB_DLLOAD],
 633 [m4_pattern_allow([^LT_DLLOADERS$])
 634 LT_DLLOADERS=
 635 AC_SUBST([LT_DLLOADERS])
 636
 637 AC_LANG_PUSH([C])
 638
 639 LIBADD_DLOPEN=
 640 AC_SEARCH_LIBS([dlopen], [dl],
 641         [AC_DEFINE([HAVE_LIBDL], [1],
 642                    [Define if you have the libdl library or equivalent.])
 643         if test "$ac_cv_search_dlopen" != "none required" ; then
 644           LIBADD_DLOPEN="-ldl"
 645         fi
 646         libltdl_cv_lib_dl_dlopen="yes"
 647         LT_DLLOADERS="$LT_DLLOADERS ${lt_dlopen_dir+$lt_dlopen_dir/}dlopen.la"],
 648     [AC_LINK_IFELSE([AC_LANG_PROGRAM([[#if HAVE_DLFCN_H
 649 #  include <dlfcn.h>
 650 #endif
 651     ]], [[dlopen(0, 0);]])],
 652             [AC_DEFINE([HAVE_LIBDL], [1],
 653                        [Define if you have the libdl library or equivalent.])
 654             libltdl_cv_func_dlopen="yes"
 655             LT_DLLOADERS="$LT_DLLOADERS ${lt_dlopen_dir+$lt_dlopen_dir/}dlopen.la"],
 656         [AC_CHECK_LIB([svld], [dlopen],
 657                 [AC_DEFINE([HAVE_LIBDL], [1],
 658                          [Define if you have the libdl library or equivalent.])
 659                 LIBADD_DLOPEN="-lsvld" libltdl_cv_func_dlopen="yes"
 660                 LT_DLLOADERS="$LT_DLLOADERS ${lt_dlopen_dir+$lt_dlopen_dir/}dlopen.la"])])])
 661 if test x"$libltdl_cv_func_dlopen" = xyes || test x"$libltdl_cv_lib_dl_dlopen" = xyes
 662 then
 663   lt_save_LIBS="$LIBS"
 664   LIBS="$LIBS $LIBADD_DLOPEN"
 665   AC_CHECK_FUNCS([dlerror])
 666   LIBS="$lt_save_LIBS"
 667 fi
 668 AC_SUBST([LIBADD_DLOPEN])
 669
 670 LIBADD_SHL_LOAD=
 671 AC_CHECK_FUNC([shl_load],
 672         [AC_DEFINE([HAVE_SHL_LOAD], [1],
 673                    [Define if you have the shl_load function.])
 674         LT_DLLOADERS="$LT_DLLOADERS ${lt_dlopen_dir+$lt_dlopen_dir/}shl_load.la"],
 675     [AC_CHECK_LIB([dld], [shl_load],
 676             [AC_DEFINE([HAVE_SHL_LOAD], [1],
 677                        [Define if you have the shl_load function.])
 678             LT_DLLOADERS="$LT_DLLOADERS ${lt_dlopen_dir+$lt_dlopen_dir/}shl_load.la"
 679             LIBADD_SHL_LOAD="-ldld"])])
 680 AC_SUBST([LIBADD_SHL_LOAD])
 681
 682 case $host_os in
 683 darwin[[1567]].*)
 684 # We only want this for pre-Mac OS X 10.4.
 685   AC_CHECK_FUNC([_dyld_func_lookup],
 686         [AC_DEFINE([HAVE_DYLD], [1],
 687                    [Define if you have the _dyld_func_lookup function.])
 688         LT_DLLOADERS="$LT_DLLOADERS ${lt_dlopen_dir+$lt_dlopen_dir/}dyld.la"])
 689   ;;
 690 beos*)
 691   LT_DLLOADERS="$LT_DLLOADERS ${lt_dlopen_dir+$lt_dlopen_dir/}load_add_on.la"
 692   ;;
 693 cygwin* | mingw* | os2* | pw32*)
 694   AC_CHECK_DECLS([cygwin_conv_path], [], [], [[#include <sys/cygwin.h>]])
 695   LT_DLLOADERS="$LT_DLLOADERS ${lt_dlopen_dir+$lt_dlopen_dir/}loadlibrary.la"
 696   ;;
 697 esac
 698
 699 AC_CHECK_LIB([dld], [dld_link],
 700         [AC_DEFINE([HAVE_DLD], [1],
 701                    [Define if you have the GNU dld library.])
 702                 LT_DLLOADERS="$LT_DLLOADERS ${lt_dlopen_dir+$lt_dlopen_dir/}dld_link.la"])
 703 AC_SUBST([LIBADD_DLD_LINK])
 704
 705 m4_pattern_allow([^LT_DLPREOPEN$])
 706 LT_DLPREOPEN=
 707 if test -n "$LT_DLLOADERS"
 708 then
 709   for lt_loader in $LT_DLLOADERS; do
 710     LT_DLPREOPEN="$LT_DLPREOPEN-dlpreopen $lt_loader "
 711   done
 712   AC_DEFINE([HAVE_LIBDLLOADER], [1],
 713             [Define if libdlloader will be built on this platform])
 714 fi
 715 AC_SUBST([LT_DLPREOPEN])
 716
 717 dnl This isn't used anymore, but set it for backwards compatibility
 718 LIBADD_DL="$LIBADD_DLOPEN $LIBADD_SHL_LOAD"
 719 AC_SUBST([LIBADD_DL])
 720
 721 AC_LANG_POP
 722 ])# LT_LIB_DLLOAD
 723
 724 # Old name:
 725 AU_ALIAS([AC_LTDL_DLLIB], [LT_LIB_DLLOAD])
 726 dnl aclocal-1.4 backwards compatibility:
 727 dnl AC_DEFUN([AC_LTDL_DLLIB], [])
 728
 729
 730 # LT_SYS_SYMBOL_USCORE
 731 # --------------------
 732 # does the compiler prefix global symbols with an underscore?
 733 AC_DEFUN([LT_SYS_SYMBOL_USCORE],
 734 [m4_require([_LT_CMD_GLOBAL_SYMBOLS])dnl
 735 AC_CACHE_CHECK([for _ prefix in compiled symbols],
 736   [lt_cv_sys_symbol_underscore],
 737   [lt_cv_sys_symbol_underscore=no
 738   cat > conftest.$ac_ext <<_LT_EOF
 739 void nm_test_func(){}
 740 int main(){nm_test_func;return 0;}
 741 _LT_EOF
 742   if AC_TRY_EVAL(ac_compile); then
 743     # Now try to grab the symbols.
 744     ac_nlist=conftest.nm
 745     if AC_TRY_EVAL(NM conftest.$ac_objext \| $lt_cv_sys_global_symbol_pipe \> $ac_nlist) && test -s "$ac_nlist"; then
 746       # See whether the symbols have a leading underscore.
 747       if grep '^. _nm_test_func' "$ac_nlist" >/dev/null; then
 748         lt_cv_sys_symbol_underscore=yes
 749       else
 750         if grep '^. nm_test_func ' "$ac_nlist" >/dev/null; then
 751           :
 752         else
 753           echo "configure: cannot find nm_test_func in $ac_nlist" >&AS_MESSAGE_LOG_FD
 754         fi
 755       fi
 756     else
 757       echo "configure: cannot run $lt_cv_sys_global_symbol_pipe" >&AS_MESSAGE_LOG_FD
 758     fi
 759   else
 760     echo "configure: failed program was:" >&AS_MESSAGE_LOG_FD
 761     cat conftest.c >&AS_MESSAGE_LOG_FD
 762   fi
 763   rm -rf conftest*
 764   ])
 765   sys_symbol_underscore=$lt_cv_sys_symbol_underscore
 766   AC_SUBST([sys_symbol_underscore])
 767 ])# LT_SYS_SYMBOL_USCORE
 768
 769 # Old name:
 770 AU_ALIAS([AC_LTDL_SYMBOL_USCORE], [LT_SYS_SYMBOL_USCORE])
 771 dnl aclocal-1.4 backwards compatibility:
 772 dnl AC_DEFUN([AC_LTDL_SYMBOL_USCORE], [])
 773
 774
 775 # LT_FUNC_DLSYM_USCORE
 776 # --------------------
 777 AC_DEFUN([LT_FUNC_DLSYM_USCORE],
 778 [AC_REQUIRE([LT_SYS_SYMBOL_USCORE])dnl
 779 if test x"$lt_cv_sys_symbol_underscore" = xyes; then
 780   if test x"$libltdl_cv_func_dlopen" = xyes ||
 781      test x"$libltdl_cv_lib_dl_dlopen" = xyes ; then
 782         AC_CACHE_CHECK([whether we have to add an underscore for dlsym],
 783           [libltdl_cv_need_uscore],
 784           [libltdl_cv_need_uscore=unknown
 785           save_LIBS="$LIBS"
 786           LIBS="$LIBS $LIBADD_DLOPEN"
 787           _LT_TRY_DLOPEN_SELF(
 788             [libltdl_cv_need_uscore=no], [libltdl_cv_need_uscore=yes],
 789             [],                          [libltdl_cv_need_uscore=cross])
 790           LIBS="$save_LIBS"
 791         ])
 792   fi
 793 fi
 794
 795 if test x"$libltdl_cv_need_uscore" = xyes; then
 796   AC_DEFINE([NEED_USCORE], [1],
 797     [Define if dlsym() requires a leading underscore in symbol names.])
 798 fi
 799 ])# LT_FUNC_DLSYM_USCORE
 800
 801 # Old name:
 802 AU_ALIAS([AC_LTDL_DLSYM_USCORE], [LT_FUNC_DLSYM_USCORE])
 803 dnl aclocal-1.4 backwards compatibility:
 804 dnl AC_DEFUN([AC_LTDL_DLSYM_USCORE], [])