Annotation of gforth/libltdl/m4/ltdl.m4, revision 1.1

1.1     ! anton       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 14 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([$1])
        !            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([$1])
        !           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:   AS_LITERAL_IF([$1], [_LT_LIBSOURCES([$1.c])])dnl
        !           216:   _LT_LIBOBJS="$_LT_LIBOBJS $1.$ac_objext"
        !           217: ])# _LT_LIBOBJS
        !           218: 
        !           219: 
        !           220: # _LT_LIBSOURCES(MODULE_NAMES)
        !           221: # ----------------------------
        !           222: # Like AC_LIBSOURCES, except the directory where the libltdl source files
        !           223: # are expected is distinct from the user LIBOBJ directory.
        !           224: AC_DEFUN([_LT_LIBSOURCES], [
        !           225:   m4_foreach([_LTNAME], [$1], [
        !           226:     m4_syscmd([test -r "$lt_libobj_prefix]_LTNAME[" ||
        !           227:                test -z "$lt_libobj_prefix" ||
        !           228:                test ! -d "$lt_libobj_prefix"])dnl
        !           229:     m4_if(m4_sysval, [0], [],
        !           230:       [AC_FATAL([missing $lt_libobj_prefix/]_LTNAME)])
        !           231:   ])
        !           232: ])# _LT_LIBSOURCES
        !           233: 
        !           234: 
        !           235: # LTDL_INIT([OPTIONS])
        !           236: # --------------------
        !           237: # Clients of libltdl can use this macro to allow the installer to
        !           238: # choose between a shipped copy of the ltdl sources or a preinstalled
        !           239: # version of the library.  If the shipped ltdl sources are not in a
        !           240: # subdirectory named libltdl, the directory name must be given by
        !           241: # LT_CONFIG_LTDL_DIR.
        !           242: AC_DEFUN([LTDL_INIT],
        !           243: [dnl Parse OPTIONS
        !           244: _LT_SET_OPTIONS([$0], [$1])
        !           245: 
        !           246: dnl We need to keep our own list of libobjs separate from our parent project,
        !           247: dnl and the easiest way to do that is redefine the AC_LIBOBJs macro while
        !           248: dnl we look for our own LIBOBJs. Definitions in ltdl-libobj.m4.
        !           249: m4_pushdef([AC_LIBOBJ], m4_defn([_LT_LIBOBJ]))
        !           250: m4_pushdef([AC_LIBSOURCES], m4_defn([_LT_LIBSOURCES]))
        !           251: 
        !           252: dnl If not otherwise defined, default to the 1.5.x compatible subproject mode:
        !           253: m4_if(_LTDL_MODE, [],
        !           254:         [m4_define([_LTDL_MODE], m4_default([$2], [subproject]))
        !           255:         m4_if([-1], [m4_bregexp(_LTDL_MODE, [\(subproject\|\(non\)?recursive\)])],
        !           256:                 [m4_fatal([unknown libltdl mode: ]_LTDL_MODE)])])
        !           257: 
        !           258: AC_ARG_WITH([included_ltdl],
        !           259:     [AS_HELP_STRING([--with-included-ltdl],
        !           260:                     [use the GNU ltdl sources included here])])
        !           261: 
        !           262: if test "x$with_included_ltdl" != xyes; then
        !           263:   # We are not being forced to use the included libltdl sources, so
        !           264:   # decide whether there is a useful installed version we can use.
        !           265:   AC_CHECK_HEADER([ltdl.h],
        !           266:       [AC_CHECK_DECL([lt_dlinterface_register],
        !           267:           [AC_CHECK_LIB([ltdl], [lt_dlinterface_register],
        !           268:               [with_included_ltdl=no],
        !           269:               [with_included_ltdl=yes])],
        !           270:           [with_included_ltdl=yes],
        !           271:           [AC_INCLUDES_DEFAULT
        !           272:            #include <ltdl.h>])],
        !           273:       [with_included_ltdl=yes],
        !           274:       [AC_INCLUDES_DEFAULT]
        !           275:   )
        !           276: fi
        !           277: 
        !           278: dnl If neither LT_CONFIG_LTDL_DIR, LTDL_CONVENIENCE nor LTDL_INSTALLABLE
        !           279: dnl was called yet, then for old times' sake, we assume libltdl is in an
        !           280: dnl eponymous directory:
        !           281: AC_PROVIDE_IFELSE([LT_CONFIG_LTDL_DIR], [], [_LT_CONFIG_LTDL_DIR([libltdl])])
        !           282: 
        !           283: AC_ARG_WITH([ltdl_include],
        !           284:     [AS_HELP_STRING([--with-ltdl-include=DIR],
        !           285:                     [use the ltdl headers installed in DIR])])
        !           286: 
        !           287: if test -n "$with_ltdl_include"; then
        !           288:   if test -f "$with_ltdl_include/ltdl.h"; then :
        !           289:   else
        !           290:     AC_MSG_ERROR([invalid ltdl include directory: `$with_ltdl_include'])
        !           291:   fi
        !           292: else
        !           293:   with_ltdl_include=no
        !           294: fi
        !           295: 
        !           296: AC_ARG_WITH([ltdl_lib],
        !           297:     [AS_HELP_STRING([--with-ltdl-lib=DIR],
        !           298:                     [use the libltdl.la installed in DIR])])
        !           299: 
        !           300: if test -n "$with_ltdl_lib"; then
        !           301:   if test -f "$with_ltdl_lib/libltdl.la"; then :
        !           302:   else
        !           303:     AC_MSG_ERROR([invalid ltdl library directory: `$with_ltdl_lib'])
        !           304:   fi
        !           305: else
        !           306:   with_ltdl_lib=no
        !           307: fi
        !           308: 
        !           309: case ,$with_included_ltdl,$with_ltdl_include,$with_ltdl_lib, in
        !           310:   ,yes,no,no,)
        !           311:        m4_case(m4_default(_LTDL_TYPE, [convenience]),
        !           312:            [convenience], [_LTDL_CONVENIENCE],
        !           313:            [installable], [_LTDL_INSTALLABLE],
        !           314:          [m4_fatal([unknown libltdl build type: ]_LTDL_TYPE)])
        !           315:        ;;
        !           316:   ,no,no,no,)
        !           317:        # If the included ltdl is not to be used, then use the
        !           318:        # preinstalled libltdl we found.
        !           319:        AC_DEFINE([HAVE_LTDL], [1],
        !           320:          [Define this if a modern libltdl is already installed])
        !           321:        LIBLTDL=-lltdl
        !           322:        LTDLDEPS=
        !           323:        LTDLINCL=
        !           324:        ;;
        !           325:   ,no*,no,*)
        !           326:        AC_MSG_ERROR([`--with-ltdl-include' and `--with-ltdl-lib' options must be used together])
        !           327:        ;;
        !           328:   *)   with_included_ltdl=no
        !           329:        LIBLTDL="-L$with_ltdl_lib -lltdl"
        !           330:        LTDLDEPS=
        !           331:        LTDLINCL="-I$with_ltdl_include"
        !           332:        ;;
        !           333: esac
        !           334: INCLTDL="$LTDLINCL"
        !           335: 
        !           336: # Report our decision...
        !           337: AC_MSG_CHECKING([where to find libltdl headers])
        !           338: AC_MSG_RESULT([$LTDLINCL])
        !           339: AC_MSG_CHECKING([where to find libltdl library])
        !           340: AC_MSG_RESULT([$LIBLTDL])
        !           341: 
        !           342: _LTDL_SETUP
        !           343: 
        !           344: dnl restore autoconf definition.
        !           345: m4_popdef([AC_LIBOBJ])
        !           346: m4_popdef([AC_LIBSOURCES])
        !           347: 
        !           348: AC_CONFIG_COMMANDS_PRE([
        !           349:     _ltdl_libobjs=
        !           350:     _ltdl_ltlibobjs=
        !           351:     if test -n "$_LT_LIBOBJS"; then
        !           352:       # Remove the extension.
        !           353:       _lt_sed_drop_objext='s/\.o$//;s/\.obj$//'
        !           354:       for i in `for i in $_LT_LIBOBJS; do echo "$i"; done | sed "$_lt_sed_drop_objext" | sort -u`; do
        !           355:         _ltdl_libobjs="$_ltdl_libobjs $lt_libobj_prefix$i.$ac_objext"
        !           356:         _ltdl_ltlibobjs="$_ltdl_ltlibobjs $lt_libobj_prefix$i.lo"
        !           357:       done
        !           358:     fi
        !           359:     AC_SUBST([ltdl_LIBOBJS], [$_ltdl_libobjs])
        !           360:     AC_SUBST([ltdl_LTLIBOBJS], [$_ltdl_ltlibobjs])
        !           361: ])
        !           362: 
        !           363: # Only expand once:
        !           364: m4_define([LTDL_INIT])
        !           365: ])# LTDL_INIT
        !           366: 
        !           367: # Old names:
        !           368: AU_DEFUN([AC_LIB_LTDL], [LTDL_INIT($@)])
        !           369: AU_DEFUN([AC_WITH_LTDL], [LTDL_INIT($@)])
        !           370: AU_DEFUN([LT_WITH_LTDL], [LTDL_INIT($@)])
        !           371: dnl aclocal-1.4 backwards compatibility:
        !           372: dnl AC_DEFUN([AC_LIB_LTDL], [])
        !           373: dnl AC_DEFUN([AC_WITH_LTDL], [])
        !           374: dnl AC_DEFUN([LT_WITH_LTDL], [])
        !           375: 
        !           376: 
        !           377: # _LTDL_SETUP
        !           378: # -----------
        !           379: # Perform all the checks necessary for compilation of the ltdl objects
        !           380: #  -- including compiler checks and header checks.  This is a public
        !           381: # interface  mainly for the benefit of libltdl's own configure.ac, most
        !           382: # other users should call LTDL_INIT instead.
        !           383: AC_DEFUN([_LTDL_SETUP],
        !           384: [AC_REQUIRE([AC_PROG_CC])dnl
        !           385: AC_REQUIRE([LT_SYS_MODULE_EXT])dnl
        !           386: AC_REQUIRE([LT_SYS_MODULE_PATH])dnl
        !           387: AC_REQUIRE([LT_SYS_DLSEARCH_PATH])dnl
        !           388: AC_REQUIRE([LT_LIB_DLLOAD])dnl
        !           389: AC_REQUIRE([LT_SYS_SYMBOL_USCORE])dnl
        !           390: AC_REQUIRE([LT_FUNC_DLSYM_USCORE])dnl
        !           391: AC_REQUIRE([LT_SYS_DLOPEN_DEPLIBS])dnl
        !           392: AC_REQUIRE([gl_FUNC_ARGZ])dnl
        !           393: 
        !           394: m4_require([_LT_CHECK_OBJDIR])dnl
        !           395: m4_require([_LT_HEADER_DLFCN])dnl
        !           396: m4_require([_LT_CHECK_DLPREOPEN])dnl
        !           397: m4_require([_LT_DECL_SED])dnl
        !           398: 
        !           399: # lt_cv_dlopen_self gets defined by LT_SYS_DLOPEN_SELF, called by LT_INIT
        !           400: if test "$lt_cv_dlopen_self" = yes; then
        !           401:   AC_DEFINE([LTDL_DLOPEN_SELF_WORKS], [1],
        !           402:     [Define if dlopen(NULL) is able to resolve symbols from the main program.])
        !           403: fi
        !           404: 
        !           405: dnl Don't require this, or it will be expanded earlier than the code
        !           406: dnl that sets the variables it relies on:
        !           407: _LT_ENABLE_INSTALL
        !           408: 
        !           409: dnl _LTDL_MODE specific code must be called at least once:
        !           410: _LTDL_MODE_DISPATCH
        !           411: 
        !           412: # In order that ltdl.c can compile, find out the first AC_CONFIG_HEADERS
        !           413: # the user used.  This is so that ltdl.h can pick up the parent projects
        !           414: # config.h file, The first file in AC_CONFIG_HEADERS must contain the
        !           415: # definitions required by ltdl.c.
        !           416: # FIXME: Remove use of undocumented AC_LIST_HEADERS (2.59 compatibility).
        !           417: AC_CONFIG_COMMANDS_PRE([dnl
        !           418: m4_pattern_allow([^LT_CONFIG_H$])dnl
        !           419: m4_ifset([AH_HEADER],
        !           420:     [LT_CONFIG_H=AH_HEADER],
        !           421:     [m4_ifset([AC_LIST_HEADERS],
        !           422:            [LT_CONFIG_H=`echo "AC_LIST_HEADERS" | $SED 's,^[[      ]]*,,;s,[[ :]].*$,,'`],
        !           423:        [])])])
        !           424: AC_SUBST([LT_CONFIG_H])
        !           425: 
        !           426: AC_CHECK_HEADERS([unistd.h dl.h sys/dl.h dld.h mach-o/dyld.h dirent.h],
        !           427:        [], [], [AC_INCLUDES_DEFAULT])
        !           428: 
        !           429: AC_CHECK_FUNCS([closedir opendir readdir], [], [AC_LIBOBJ([lt__dirent])])
        !           430: AC_CHECK_FUNCS([strlcat strlcpy], [], [AC_LIBOBJ([lt__strl])])
        !           431: 
        !           432: name=ltdl
        !           433: LTDLOPEN=`eval "\\$ECHO \"$libname_spec\""`
        !           434: AC_SUBST([LTDLOPEN])
        !           435: ])# _LTDL_SETUP
        !           436: 
        !           437: 
        !           438: # _LT_ENABLE_INSTALL
        !           439: # ------------------
        !           440: m4_define([_LT_ENABLE_INSTALL],
        !           441: [AC_ARG_ENABLE([ltdl-install],
        !           442:     [AS_HELP_STRING([--enable-ltdl-install], [install libltdl])])
        !           443: 
        !           444: case ,${enable_ltdl_install},${enable_ltdl_convenience} in
        !           445:   *yes*) ;;
        !           446:   *) enable_ltdl_convenience=yes ;;
        !           447: esac
        !           448: 
        !           449: m4_ifdef([AM_CONDITIONAL],
        !           450: [AM_CONDITIONAL(INSTALL_LTDL, test x"${enable_ltdl_install-no}" != xno)
        !           451:  AM_CONDITIONAL(CONVENIENCE_LTDL, test x"${enable_ltdl_convenience-no}" != xno)])
        !           452: ])# _LT_ENABLE_INSTALL
        !           453: 
        !           454: 
        !           455: # LT_SYS_DLOPEN_DEPLIBS
        !           456: # ---------------------
        !           457: AC_DEFUN([LT_SYS_DLOPEN_DEPLIBS],
        !           458: [AC_REQUIRE([AC_CANONICAL_HOST])dnl
        !           459: AC_CACHE_CHECK([whether deplibs are loaded by dlopen],
        !           460:   [lt_cv_sys_dlopen_deplibs],
        !           461:   [# PORTME does your system automatically load deplibs for dlopen?
        !           462:   # or its logical equivalent (e.g. shl_load for HP-UX < 11)
        !           463:   # For now, we just catch OSes we know something about -- in the
        !           464:   # future, we'll try test this programmatically.
        !           465:   lt_cv_sys_dlopen_deplibs=unknown
        !           466:   case $host_os in
        !           467:   aix3*|aix4.1.*|aix4.2.*)
        !           468:     # Unknown whether this is true for these versions of AIX, but
        !           469:     # we want this `case' here to explicitly catch those versions.
        !           470:     lt_cv_sys_dlopen_deplibs=unknown
        !           471:     ;;
        !           472:   aix[[4-9]]*)
        !           473:     lt_cv_sys_dlopen_deplibs=yes
        !           474:     ;;
        !           475:   amigaos*)
        !           476:     case $host_cpu in
        !           477:     powerpc)
        !           478:       lt_cv_sys_dlopen_deplibs=no
        !           479:       ;;
        !           480:     esac
        !           481:     ;;
        !           482:   darwin*)
        !           483:     # Assuming the user has installed a libdl from somewhere, this is true
        !           484:     # If you are looking for one http://www.opendarwin.org/projects/dlcompat
        !           485:     lt_cv_sys_dlopen_deplibs=yes
        !           486:     ;;
        !           487:   freebsd* | dragonfly*)
        !           488:     lt_cv_sys_dlopen_deplibs=yes
        !           489:     ;;
        !           490:   gnu* | linux* | k*bsd*-gnu)
        !           491:     # GNU and its variants, using gnu ld.so (Glibc)
        !           492:     lt_cv_sys_dlopen_deplibs=yes
        !           493:     ;;
        !           494:   hpux10*|hpux11*)
        !           495:     lt_cv_sys_dlopen_deplibs=yes
        !           496:     ;;
        !           497:   interix*)
        !           498:     lt_cv_sys_dlopen_deplibs=yes
        !           499:     ;;
        !           500:   irix[[12345]]*|irix6.[[01]]*)
        !           501:     # Catch all versions of IRIX before 6.2, and indicate that we don't
        !           502:     # know how it worked for any of those versions.
        !           503:     lt_cv_sys_dlopen_deplibs=unknown
        !           504:     ;;
        !           505:   irix*)
        !           506:     # The case above catches anything before 6.2, and it's known that
        !           507:     # at 6.2 and later dlopen does load deplibs.
        !           508:     lt_cv_sys_dlopen_deplibs=yes
        !           509:     ;;
        !           510:   netbsd*)
        !           511:     lt_cv_sys_dlopen_deplibs=yes
        !           512:     ;;
        !           513:   openbsd*)
        !           514:     lt_cv_sys_dlopen_deplibs=yes
        !           515:     ;;
        !           516:   osf[[1234]]*)
        !           517:     # dlopen did load deplibs (at least at 4.x), but until the 5.x series,
        !           518:     # it did *not* use an RPATH in a shared library to find objects the
        !           519:     # library depends on, so we explicitly say `no'.
        !           520:     lt_cv_sys_dlopen_deplibs=no
        !           521:     ;;
        !           522:   osf5.0|osf5.0a|osf5.1)
        !           523:     # dlopen *does* load deplibs and with the right loader patch applied
        !           524:     # it even uses RPATH in a shared library to search for shared objects
        !           525:     # that the library depends on, but there's no easy way to know if that
        !           526:     # patch is installed.  Since this is the case, all we can really
        !           527:     # say is unknown -- it depends on the patch being installed.  If
        !           528:     # it is, this changes to `yes'.  Without it, it would be `no'.
        !           529:     lt_cv_sys_dlopen_deplibs=unknown
        !           530:     ;;
        !           531:   osf*)
        !           532:     # the two cases above should catch all versions of osf <= 5.1.  Read
        !           533:     # the comments above for what we know about them.
        !           534:     # At > 5.1, deplibs are loaded *and* any RPATH in a shared library
        !           535:     # is used to find them so we can finally say `yes'.
        !           536:     lt_cv_sys_dlopen_deplibs=yes
        !           537:     ;;
        !           538:   qnx*)
        !           539:     lt_cv_sys_dlopen_deplibs=yes
        !           540:     ;;
        !           541:   solaris*)
        !           542:     lt_cv_sys_dlopen_deplibs=yes
        !           543:     ;;
        !           544:   sysv5* | sco3.2v5* | sco5v6* | unixware* | OpenUNIX* | sysv4*uw2*)
        !           545:     libltdl_cv_sys_dlopen_deplibs=yes
        !           546:     ;;
        !           547:   esac
        !           548:   ])
        !           549: if test "$lt_cv_sys_dlopen_deplibs" != yes; then
        !           550:  AC_DEFINE([LTDL_DLOPEN_DEPLIBS], [1],
        !           551:     [Define if the OS needs help to load dependent libraries for dlopen().])
        !           552: fi
        !           553: ])# LT_SYS_DLOPEN_DEPLIBS
        !           554: 
        !           555: # Old name:
        !           556: AU_ALIAS([AC_LTDL_SYS_DLOPEN_DEPLIBS], [LT_SYS_DLOPEN_DEPLIBS])
        !           557: dnl aclocal-1.4 backwards compatibility:
        !           558: dnl AC_DEFUN([AC_LTDL_SYS_DLOPEN_DEPLIBS], [])
        !           559: 
        !           560: 
        !           561: # LT_SYS_MODULE_EXT
        !           562: # -----------------
        !           563: AC_DEFUN([LT_SYS_MODULE_EXT],
        !           564: [m4_require([_LT_SYS_DYNAMIC_LINKER])dnl
        !           565: AC_CACHE_CHECK([which extension is used for runtime loadable modules],
        !           566:   [libltdl_cv_shlibext],
        !           567: [
        !           568: module=yes
        !           569: eval libltdl_cv_shlibext=$shrext_cmds
        !           570:   ])
        !           571: if test -n "$libltdl_cv_shlibext"; then
        !           572:   m4_pattern_allow([LT_MODULE_EXT])dnl
        !           573:   AC_DEFINE_UNQUOTED([LT_MODULE_EXT], ["$libltdl_cv_shlibext"],
        !           574:     [Define to the extension used for runtime loadable modules, say, ".so".])
        !           575: fi
        !           576: ])# LT_SYS_MODULE_EXT
        !           577: 
        !           578: # Old name:
        !           579: AU_ALIAS([AC_LTDL_SHLIBEXT], [LT_SYS_MODULE_EXT])
        !           580: dnl aclocal-1.4 backwards compatibility:
        !           581: dnl AC_DEFUN([AC_LTDL_SHLIBEXT], [])
        !           582: 
        !           583: 
        !           584: # LT_SYS_MODULE_PATH
        !           585: # ------------------
        !           586: AC_DEFUN([LT_SYS_MODULE_PATH],
        !           587: [m4_require([_LT_SYS_DYNAMIC_LINKER])dnl
        !           588: AC_CACHE_CHECK([which variable specifies run-time module search path],
        !           589:   [lt_cv_module_path_var], [lt_cv_module_path_var="$shlibpath_var"])
        !           590: if test -n "$lt_cv_module_path_var"; then
        !           591:   m4_pattern_allow([LT_MODULE_PATH_VAR])dnl
        !           592:   AC_DEFINE_UNQUOTED([LT_MODULE_PATH_VAR], ["$lt_cv_module_path_var"],
        !           593:     [Define to the name of the environment variable that determines the run-time module search path.])
        !           594: fi
        !           595: ])# LT_SYS_MODULE_PATH
        !           596: 
        !           597: # Old name:
        !           598: AU_ALIAS([AC_LTDL_SHLIBPATH], [LT_SYS_MODULE_PATH])
        !           599: dnl aclocal-1.4 backwards compatibility:
        !           600: dnl AC_DEFUN([AC_LTDL_SHLIBPATH], [])
        !           601: 
        !           602: 
        !           603: # LT_SYS_DLSEARCH_PATH
        !           604: # --------------------
        !           605: AC_DEFUN([LT_SYS_DLSEARCH_PATH],
        !           606: [m4_require([_LT_SYS_DYNAMIC_LINKER])dnl
        !           607: AC_CACHE_CHECK([for the default library search path],
        !           608:   [lt_cv_sys_dlsearch_path],
        !           609:   [lt_cv_sys_dlsearch_path="$sys_lib_dlsearch_path_spec"])
        !           610: if test -n "$lt_cv_sys_dlsearch_path"; then
        !           611:   sys_dlsearch_path=
        !           612:   for dir in $lt_cv_sys_dlsearch_path; do
        !           613:     if test -z "$sys_dlsearch_path"; then
        !           614:       sys_dlsearch_path="$dir"
        !           615:     else
        !           616:       sys_dlsearch_path="$sys_dlsearch_path$PATH_SEPARATOR$dir"
        !           617:     fi
        !           618:   done
        !           619:   m4_pattern_allow([LT_DLSEARCH_PATH])dnl
        !           620:   AC_DEFINE_UNQUOTED([LT_DLSEARCH_PATH], ["$sys_dlsearch_path"],
        !           621:     [Define to the system default library search path.])
        !           622: fi
        !           623: ])# LT_SYS_DLSEARCH_PATH
        !           624: 
        !           625: # Old name:
        !           626: AU_ALIAS([AC_LTDL_SYSSEARCHPATH], [LT_SYS_DLSEARCH_PATH])
        !           627: dnl aclocal-1.4 backwards compatibility:
        !           628: dnl AC_DEFUN([AC_LTDL_SYSSEARCHPATH], [])
        !           629: 
        !           630: 
        !           631: # _LT_CHECK_DLPREOPEN
        !           632: # -------------------
        !           633: m4_defun([_LT_CHECK_DLPREOPEN],
        !           634: [m4_require([_LT_CMD_GLOBAL_SYMBOLS])dnl
        !           635: AC_CACHE_CHECK([whether libtool supports -dlopen/-dlpreopen],
        !           636:   [libltdl_cv_preloaded_symbols],
        !           637:   [if test -n "$lt_cv_sys_global_symbol_pipe"; then
        !           638:     libltdl_cv_preloaded_symbols=yes
        !           639:   else
        !           640:     libltdl_cv_preloaded_symbols=no
        !           641:   fi
        !           642:   ])
        !           643: if test x"$libltdl_cv_preloaded_symbols" = xyes; then
        !           644:   AC_DEFINE([HAVE_PRELOADED_SYMBOLS], [1],
        !           645:     [Define if libtool can extract symbol lists from object files.])
        !           646: fi
        !           647: ])# _LT_CHECK_DLPREOPEN
        !           648: 
        !           649: 
        !           650: # LT_LIB_DLLOAD
        !           651: # -------------
        !           652: AC_DEFUN([LT_LIB_DLLOAD],
        !           653: [m4_pattern_allow([^LT_DLLOADERS$])
        !           654: LT_DLLOADERS=
        !           655: AC_SUBST([LT_DLLOADERS])
        !           656: 
        !           657: AC_LANG_PUSH([C])
        !           658: 
        !           659: LIBADD_DLOPEN=
        !           660: AC_SEARCH_LIBS([dlopen], [dl],
        !           661:        [AC_DEFINE([HAVE_LIBDL], [1],
        !           662:                   [Define if you have the libdl library or equivalent.])
        !           663:        if test "$ac_cv_search_dlopen" != "none required" ; then
        !           664:          LIBADD_DLOPEN="-ldl"
        !           665:        fi
        !           666:        libltdl_cv_lib_dl_dlopen="yes"
        !           667:        LT_DLLOADERS="$LT_DLLOADERS ${lt_dlopen_dir+$lt_dlopen_dir/}dlopen.la"],
        !           668:     [AC_LINK_IFELSE([AC_LANG_PROGRAM([[#if HAVE_DLFCN_H
        !           669: #  include <dlfcn.h>
        !           670: #endif
        !           671:     ]], [[dlopen(0, 0);]])],
        !           672:            [AC_DEFINE([HAVE_LIBDL], [1],
        !           673:                       [Define if you have the libdl library or equivalent.])
        !           674:            libltdl_cv_func_dlopen="yes"
        !           675:            LT_DLLOADERS="$LT_DLLOADERS ${lt_dlopen_dir+$lt_dlopen_dir/}dlopen.la"],
        !           676:        [AC_CHECK_LIB([svld], [dlopen],
        !           677:                [AC_DEFINE([HAVE_LIBDL], [1],
        !           678:                         [Define if you have the libdl library or equivalent.])
        !           679:                LIBADD_DLOPEN="-lsvld" libltdl_cv_func_dlopen="yes"
        !           680:                LT_DLLOADERS="$LT_DLLOADERS ${lt_dlopen_dir+$lt_dlopen_dir/}dlopen.la"])])])
        !           681: if test x"$libltdl_cv_func_dlopen" = xyes || test x"$libltdl_cv_lib_dl_dlopen" = xyes
        !           682: then
        !           683:   lt_save_LIBS="$LIBS"
        !           684:   LIBS="$LIBS $LIBADD_DLOPEN"
        !           685:   AC_CHECK_FUNCS([dlerror])
        !           686:   LIBS="$lt_save_LIBS"
        !           687: fi
        !           688: AC_SUBST([LIBADD_DLOPEN])
        !           689: 
        !           690: LIBADD_SHL_LOAD=
        !           691: AC_CHECK_FUNC([shl_load],
        !           692:        [AC_DEFINE([HAVE_SHL_LOAD], [1],
        !           693:                   [Define if you have the shl_load function.])
        !           694:        LT_DLLOADERS="$LT_DLLOADERS ${lt_dlopen_dir+$lt_dlopen_dir/}shl_load.la"],
        !           695:     [AC_CHECK_LIB([dld], [shl_load],
        !           696:            [AC_DEFINE([HAVE_SHL_LOAD], [1],
        !           697:                       [Define if you have the shl_load function.])
        !           698:            LT_DLLOADERS="$LT_DLLOADERS ${lt_dlopen_dir+$lt_dlopen_dir/}shl_load.la"
        !           699:            LIBADD_SHL_LOAD="-ldld"])])
        !           700: AC_SUBST([LIBADD_SHL_LOAD])
        !           701: 
        !           702: case $host_os in
        !           703: darwin[[1567]].*)
        !           704: # We only want this for pre-Mac OS X 10.4.
        !           705:   AC_CHECK_FUNC([_dyld_func_lookup],
        !           706:        [AC_DEFINE([HAVE_DYLD], [1],
        !           707:                   [Define if you have the _dyld_func_lookup function.])
        !           708:        LT_DLLOADERS="$LT_DLLOADERS ${lt_dlopen_dir+$lt_dlopen_dir/}dyld.la"])
        !           709:   ;;
        !           710: beos*)
        !           711:   LT_DLLOADERS="$LT_DLLOADERS ${lt_dlopen_dir+$lt_dlopen_dir/}load_add_on.la"
        !           712:   ;;
        !           713: cygwin* | mingw* | os2* | pw32*)
        !           714:   LT_DLLOADERS="$LT_DLLOADERS ${lt_dlopen_dir+$lt_dlopen_dir/}loadlibrary.la"
        !           715:   ;;
        !           716: esac
        !           717: 
        !           718: AC_CHECK_LIB([dld], [dld_link],
        !           719:        [AC_DEFINE([HAVE_DLD], [1],
        !           720:                   [Define if you have the GNU dld library.])
        !           721:                LT_DLLOADERS="$LT_DLLOADERS ${lt_dlopen_dir+$lt_dlopen_dir/}dld_link.la"])
        !           722: AC_SUBST([LIBADD_DLD_LINK])
        !           723: 
        !           724: m4_pattern_allow([^LT_DLPREOPEN$])
        !           725: LT_DLPREOPEN=
        !           726: if test -n "$LT_DLLOADERS"
        !           727: then
        !           728:   for lt_loader in $LT_DLLOADERS; do
        !           729:     LT_DLPREOPEN="$LT_DLPREOPEN-dlpreopen $lt_loader "
        !           730:   done
        !           731:   AC_DEFINE([HAVE_LIBDLLOADER], [1],
        !           732:             [Define if libdlloader will be built on this platform])
        !           733: fi
        !           734: AC_SUBST([LT_DLPREOPEN])
        !           735: 
        !           736: dnl This isn't used anymore, but set it for backwards compatibility
        !           737: LIBADD_DL="$LIBADD_DLOPEN $LIBADD_SHL_LOAD"
        !           738: AC_SUBST([LIBADD_DL])
        !           739: 
        !           740: AC_LANG_POP
        !           741: ])# LT_LIB_DLLOAD
        !           742: 
        !           743: # Old name:
        !           744: AU_ALIAS([AC_LTDL_DLLIB], [LT_LIB_DLLOAD])
        !           745: dnl aclocal-1.4 backwards compatibility:
        !           746: dnl AC_DEFUN([AC_LTDL_DLLIB], [])
        !           747: 
        !           748: 
        !           749: # LT_SYS_SYMBOL_USCORE
        !           750: # --------------------
        !           751: # does the compiler prefix global symbols with an underscore?
        !           752: AC_DEFUN([LT_SYS_SYMBOL_USCORE],
        !           753: [m4_require([_LT_CMD_GLOBAL_SYMBOLS])dnl
        !           754: AC_CACHE_CHECK([for _ prefix in compiled symbols],
        !           755:   [lt_cv_sys_symbol_underscore],
        !           756:   [lt_cv_sys_symbol_underscore=no
        !           757:   cat > conftest.$ac_ext <<_LT_EOF
        !           758: void nm_test_func(){}
        !           759: int main(){nm_test_func;return 0;}
        !           760: _LT_EOF
        !           761:   if AC_TRY_EVAL(ac_compile); then
        !           762:     # Now try to grab the symbols.
        !           763:     ac_nlist=conftest.nm
        !           764:     if AC_TRY_EVAL(NM conftest.$ac_objext \| $lt_cv_sys_global_symbol_pipe \> $ac_nlist) && test -s "$ac_nlist"; then
        !           765:       # See whether the symbols have a leading underscore.
        !           766:       if grep '^. _nm_test_func' "$ac_nlist" >/dev/null; then
        !           767:         lt_cv_sys_symbol_underscore=yes
        !           768:       else
        !           769:         if grep '^. nm_test_func ' "$ac_nlist" >/dev/null; then
        !           770:          :
        !           771:         else
        !           772:          echo "configure: cannot find nm_test_func in $ac_nlist" >&AS_MESSAGE_LOG_FD
        !           773:         fi
        !           774:       fi
        !           775:     else
        !           776:       echo "configure: cannot run $lt_cv_sys_global_symbol_pipe" >&AS_MESSAGE_LOG_FD
        !           777:     fi
        !           778:   else
        !           779:     echo "configure: failed program was:" >&AS_MESSAGE_LOG_FD
        !           780:     cat conftest.c >&AS_MESSAGE_LOG_FD
        !           781:   fi
        !           782:   rm -rf conftest*
        !           783:   ])
        !           784:   sys_symbol_underscore=$lt_cv_sys_symbol_underscore
        !           785:   AC_SUBST([sys_symbol_underscore])
        !           786: ])# LT_SYS_SYMBOL_USCORE
        !           787: 
        !           788: # Old name:
        !           789: AU_ALIAS([AC_LTDL_SYMBOL_USCORE], [LT_SYS_SYMBOL_USCORE])
        !           790: dnl aclocal-1.4 backwards compatibility:
        !           791: dnl AC_DEFUN([AC_LTDL_SYMBOL_USCORE], [])
        !           792: 
        !           793: 
        !           794: # LT_FUNC_DLSYM_USCORE
        !           795: # --------------------
        !           796: AC_DEFUN([LT_FUNC_DLSYM_USCORE],
        !           797: [AC_REQUIRE([LT_SYS_SYMBOL_USCORE])dnl
        !           798: if test x"$lt_cv_sys_symbol_underscore" = xyes; then
        !           799:   if test x"$libltdl_cv_func_dlopen" = xyes ||
        !           800:      test x"$libltdl_cv_lib_dl_dlopen" = xyes ; then
        !           801:        AC_CACHE_CHECK([whether we have to add an underscore for dlsym],
        !           802:          [libltdl_cv_need_uscore],
        !           803:          [libltdl_cv_need_uscore=unknown
        !           804:           save_LIBS="$LIBS"
        !           805:           LIBS="$LIBS $LIBADD_DLOPEN"
        !           806:          _LT_TRY_DLOPEN_SELF(
        !           807:            [libltdl_cv_need_uscore=no], [libltdl_cv_need_uscore=yes],
        !           808:            [],                          [libltdl_cv_need_uscore=cross])
        !           809:          LIBS="$save_LIBS"
        !           810:        ])
        !           811:   fi
        !           812: fi
        !           813: 
        !           814: if test x"$libltdl_cv_need_uscore" = xyes; then
        !           815:   AC_DEFINE([NEED_USCORE], [1],
        !           816:     [Define if dlsym() requires a leading underscore in symbol names.])
        !           817: fi
        !           818: ])# LT_FUNC_DLSYM_USCORE
        !           819: 
        !           820: # Old name:
        !           821: AU_ALIAS([AC_LTDL_DLSYM_USCORE], [LT_FUNC_DLSYM_USCORE])
        !           822: dnl aclocal-1.4 backwards compatibility:
        !           823: dnl AC_DEFUN([AC_LTDL_DLSYM_USCORE], [])

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