"Fossies" - the Fresh Open Source Software Archive

Member "ircd-hybrid-8.2.26/m4/ltdl.m4" (31 May 2019, 30047 Bytes) of package /linux/privat/ircd-hybrid-8.2.26.tgz:


As a special service "Fossies" has tried to format the requested text file into HTML format (style: standard) with prefixed line numbers. Alternatively you can here view or download the uninterpreted source code file. See also the latest Fossies "Diffs" side-by-side code changes report for "ltdl.m4": 8.2.25_vs_8.2.26.

    1 # ltdl.m4 - Configure ltdl for the target system. -*-Autoconf-*-
    2 #
    3 #   Copyright (C) 1999-2008, 2011-2015 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 20 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 yes = "${lt_lib_ltdl-no}"; then
  155     if test yes != "$enable_ltdl_install"; then
  156       # Don't overwrite $prefix/lib/libltdl.la without --enable-ltdl-install
  157       AC_MSG_WARN([not overwriting libltdl at $prefix, force with '--enable-ltdl-install'])
  158       enable_ltdl_install=no
  159     fi
  160   elif test no = "$enable_ltdl_install"; 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 yes != "$with_included_ltdl"; then
  247   # We are not being forced to use the included libltdl sources, so
  248   # decide whether there is a useful installed version we can use.
  249   AC_CHECK_HEADER([ltdl.h],
  250       [AC_CHECK_DECL([lt_dlinterface_register],
  251 	   [AC_CHECK_LIB([ltdl], [lt_dladvise_preload],
  252 	       [with_included_ltdl=no],
  253 	       [with_included_ltdl=yes])],
  254 	   [with_included_ltdl=yes],
  255 	   [AC_INCLUDES_DEFAULT
  256 	    #include <ltdl.h>])],
  257       [with_included_ltdl=yes],
  258       [AC_INCLUDES_DEFAULT]
  259   )
  260 fi
  261 
  262 dnl If neither LT_CONFIG_LTDL_DIR, LTDL_CONVENIENCE nor LTDL_INSTALLABLE
  263 dnl was called yet, then for old times' sake, we assume libltdl is in an
  264 dnl eponymous directory:
  265 AC_PROVIDE_IFELSE([LT_CONFIG_LTDL_DIR], [], [_LT_CONFIG_LTDL_DIR([libltdl])])
  266 
  267 AC_ARG_WITH([ltdl_include],
  268     [AS_HELP_STRING([--with-ltdl-include=DIR],
  269                     [use the ltdl headers installed in DIR])])
  270 
  271 if test -n "$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($@)])
  355 dnl aclocal-1.4 backwards compatibility:
  356 dnl AC_DEFUN([AC_LIB_LTDL], [])
  357 dnl AC_DEFUN([AC_WITH_LTDL], [])
  358 dnl AC_DEFUN([LT_WITH_LTDL], [])
  359 
  360 
  361 # _LTDL_SETUP
  362 # -----------
  363 # Perform all the checks necessary for compilation of the ltdl objects
  364 #  -- including compiler checks and header checks.  This is a public
  365 # interface  mainly for the benefit of libltdl's own configure.ac, most
  366 # other users should call LTDL_INIT instead.
  367 AC_DEFUN([_LTDL_SETUP],
  368 [AC_REQUIRE([AC_PROG_CC])dnl
  369 AC_REQUIRE([LT_SYS_MODULE_EXT])dnl
  370 AC_REQUIRE([LT_SYS_MODULE_PATH])dnl
  371 AC_REQUIRE([LT_SYS_DLSEARCH_PATH])dnl
  372 AC_REQUIRE([LT_LIB_DLLOAD])dnl
  373 AC_REQUIRE([LT_SYS_SYMBOL_USCORE])dnl
  374 AC_REQUIRE([LT_FUNC_DLSYM_USCORE])dnl
  375 AC_REQUIRE([LT_SYS_DLOPEN_DEPLIBS])dnl
  376 AC_REQUIRE([LT_FUNC_ARGZ])dnl
  377 
  378 m4_require([_LT_CHECK_OBJDIR])dnl
  379 m4_require([_LT_HEADER_DLFCN])dnl
  380 m4_require([_LT_CHECK_DLPREOPEN])dnl
  381 m4_require([_LT_DECL_SED])dnl
  382 
  383 dnl Don't require this, or it will be expanded earlier than the code
  384 dnl that sets the variables it relies on:
  385 _LT_ENABLE_INSTALL
  386 
  387 dnl _LTDL_MODE specific code must be called at least once:
  388 _LTDL_MODE_DISPATCH
  389 
  390 # In order that ltdl.c can compile, find out the first AC_CONFIG_HEADERS
  391 # the user used.  This is so that ltdl.h can pick up the parent projects
  392 # config.h file, The first file in AC_CONFIG_HEADERS must contain the
  393 # definitions required by ltdl.c.
  394 # FIXME: Remove use of undocumented AC_LIST_HEADERS (2.59 compatibility).
  395 AC_CONFIG_COMMANDS_PRE([dnl
  396 m4_pattern_allow([^LT_CONFIG_H$])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 m4_pattern_allow([LT_LIBEXT])dnl
  411 AC_DEFINE_UNQUOTED([LT_LIBEXT],["$libext"],[The archive extension])
  412 
  413 name=
  414 eval "lt_libprefix=\"$libname_spec\""
  415 m4_pattern_allow([LT_LIBPREFIX])dnl
  416 AC_DEFINE_UNQUOTED([LT_LIBPREFIX],["$lt_libprefix"],[The archive prefix])
  417 
  418 name=ltdl
  419 eval "LTDLOPEN=\"$libname_spec\""
  420 AC_SUBST([LTDLOPEN])
  421 ])# _LTDL_SETUP
  422 
  423 
  424 # _LT_ENABLE_INSTALL
  425 # ------------------
  426 m4_define([_LT_ENABLE_INSTALL],
  427 [AC_ARG_ENABLE([ltdl-install],
  428     [AS_HELP_STRING([--enable-ltdl-install], [install libltdl])])
  429 
  430 case ,$enable_ltdl_install,$enable_ltdl_convenience in
  431   *yes*) ;;
  432   *) enable_ltdl_convenience=yes ;;
  433 esac
  434 
  435 m4_ifdef([AM_CONDITIONAL],
  436 [AM_CONDITIONAL(INSTALL_LTDL, test no != "${enable_ltdl_install-no}")
  437  AM_CONDITIONAL(CONVENIENCE_LTDL, test no != "${enable_ltdl_convenience-no}")])
  438 ])# _LT_ENABLE_INSTALL
  439 
  440 
  441 # LT_SYS_DLOPEN_DEPLIBS
  442 # ---------------------
  443 AC_DEFUN([LT_SYS_DLOPEN_DEPLIBS],
  444 [AC_REQUIRE([AC_CANONICAL_HOST])dnl
  445 AC_CACHE_CHECK([whether deplibs are loaded by dlopen],
  446   [lt_cv_sys_dlopen_deplibs],
  447   [# PORTME does your system automatically load deplibs for dlopen?
  448   # or its logical equivalent (e.g. shl_load for HP-UX < 11)
  449   # For now, we just catch OSes we know something about -- in the
  450   # future, we'll try test this programmatically.
  451   lt_cv_sys_dlopen_deplibs=unknown
  452   case $host_os in
  453   aix3*|aix4.1.*|aix4.2.*)
  454     # Unknown whether this is true for these versions of AIX, but
  455     # we want this 'case' here to explicitly catch those versions.
  456     lt_cv_sys_dlopen_deplibs=unknown
  457     ;;
  458   aix[[4-9]]*)
  459     lt_cv_sys_dlopen_deplibs=yes
  460     ;;
  461   amigaos*)
  462     case $host_cpu in
  463     powerpc)
  464       lt_cv_sys_dlopen_deplibs=no
  465       ;;
  466     esac
  467     ;;
  468   bitrig*)
  469     lt_cv_sys_dlopen_deplibs=yes
  470     ;;
  471   darwin*)
  472     # Assuming the user has installed a libdl from somewhere, this is true
  473     # If you are looking for one http://www.opendarwin.org/projects/dlcompat
  474     lt_cv_sys_dlopen_deplibs=yes
  475     ;;
  476   freebsd* | dragonfly*)
  477     lt_cv_sys_dlopen_deplibs=yes
  478     ;;
  479   gnu* | linux* | k*bsd*-gnu | kopensolaris*-gnu)
  480     # GNU and its variants, using gnu ld.so (Glibc)
  481     lt_cv_sys_dlopen_deplibs=yes
  482     ;;
  483   hpux10*|hpux11*)
  484     lt_cv_sys_dlopen_deplibs=yes
  485     ;;
  486   interix*)
  487     lt_cv_sys_dlopen_deplibs=yes
  488     ;;
  489   irix[[12345]]*|irix6.[[01]]*)
  490     # Catch all versions of IRIX before 6.2, and indicate that we don't
  491     # know how it worked for any of those versions.
  492     lt_cv_sys_dlopen_deplibs=unknown
  493     ;;
  494   irix*)
  495     # The case above catches anything before 6.2, and it's known that
  496     # at 6.2 and later dlopen does load deplibs.
  497     lt_cv_sys_dlopen_deplibs=yes
  498     ;;
  499   netbsd* | netbsdelf*-gnu)
  500     lt_cv_sys_dlopen_deplibs=yes
  501     ;;
  502   openbsd*)
  503     lt_cv_sys_dlopen_deplibs=yes
  504     ;;
  505   osf[[1234]]*)
  506     # dlopen did load deplibs (at least at 4.x), but until the 5.x series,
  507     # it did *not* use an RPATH in a shared library to find objects the
  508     # library depends on, so we explicitly say 'no'.
  509     lt_cv_sys_dlopen_deplibs=no
  510     ;;
  511   osf5.0|osf5.0a|osf5.1)
  512     # dlopen *does* load deplibs and with the right loader patch applied
  513     # it even uses RPATH in a shared library to search for shared objects
  514     # that the library depends on, but there's no easy way to know if that
  515     # patch is installed.  Since this is the case, all we can really
  516     # say is unknown -- it depends on the patch being installed.  If
  517     # it is, this changes to 'yes'.  Without it, it would be 'no'.
  518     lt_cv_sys_dlopen_deplibs=unknown
  519     ;;
  520   osf*)
  521     # the two cases above should catch all versions of osf <= 5.1.  Read
  522     # the comments above for what we know about them.
  523     # At > 5.1, deplibs are loaded *and* any RPATH in a shared library
  524     # is used to find them so we can finally say 'yes'.
  525     lt_cv_sys_dlopen_deplibs=yes
  526     ;;
  527   qnx*)
  528     lt_cv_sys_dlopen_deplibs=yes
  529     ;;
  530   solaris*)
  531     lt_cv_sys_dlopen_deplibs=yes
  532     ;;
  533   sysv5* | sco3.2v5* | sco5v6* | unixware* | OpenUNIX* | sysv4*uw2*)
  534     libltdl_cv_sys_dlopen_deplibs=yes
  535     ;;
  536   esac
  537   ])
  538 if test yes != "$lt_cv_sys_dlopen_deplibs"; then
  539  AC_DEFINE([LTDL_DLOPEN_DEPLIBS], [1],
  540     [Define if the OS needs help to load dependent libraries for dlopen().])
  541 fi
  542 ])# LT_SYS_DLOPEN_DEPLIBS
  543 
  544 # Old name:
  545 AU_ALIAS([AC_LTDL_SYS_DLOPEN_DEPLIBS], [LT_SYS_DLOPEN_DEPLIBS])
  546 dnl aclocal-1.4 backwards compatibility:
  547 dnl AC_DEFUN([AC_LTDL_SYS_DLOPEN_DEPLIBS], [])
  548 
  549 
  550 # LT_SYS_MODULE_EXT
  551 # -----------------
  552 AC_DEFUN([LT_SYS_MODULE_EXT],
  553 [m4_require([_LT_SYS_DYNAMIC_LINKER])dnl
  554 AC_CACHE_CHECK([what extension is used for runtime loadable modules],
  555   [libltdl_cv_shlibext],
  556 [
  557 module=yes
  558 eval libltdl_cv_shlibext=$shrext_cmds
  559 module=no
  560 eval libltdl_cv_shrext=$shrext_cmds
  561   ])
  562 if test -n "$libltdl_cv_shlibext"; then
  563   m4_pattern_allow([LT_MODULE_EXT])dnl
  564   AC_DEFINE_UNQUOTED([LT_MODULE_EXT], ["$libltdl_cv_shlibext"],
  565     [Define to the extension used for runtime loadable modules, say, ".so".])
  566 fi
  567 if test "$libltdl_cv_shrext" != "$libltdl_cv_shlibext"; then
  568   m4_pattern_allow([LT_SHARED_EXT])dnl
  569   AC_DEFINE_UNQUOTED([LT_SHARED_EXT], ["$libltdl_cv_shrext"],
  570     [Define to the shared library suffix, say, ".dylib".])
  571 fi
  572 if test -n "$shared_archive_member_spec"; then
  573   m4_pattern_allow([LT_SHARED_LIB_MEMBER])dnl
  574   AC_DEFINE_UNQUOTED([LT_SHARED_LIB_MEMBER], ["($shared_archive_member_spec.o)"],
  575     [Define to the shared archive member specification, say "(shr.o)".])
  576 fi
  577 ])# LT_SYS_MODULE_EXT
  578 
  579 # Old name:
  580 AU_ALIAS([AC_LTDL_SHLIBEXT], [LT_SYS_MODULE_EXT])
  581 dnl aclocal-1.4 backwards compatibility:
  582 dnl AC_DEFUN([AC_LTDL_SHLIBEXT], [])
  583 
  584 
  585 # LT_SYS_MODULE_PATH
  586 # ------------------
  587 AC_DEFUN([LT_SYS_MODULE_PATH],
  588 [m4_require([_LT_SYS_DYNAMIC_LINKER])dnl
  589 AC_CACHE_CHECK([what variable specifies run-time module search path],
  590   [lt_cv_module_path_var], [lt_cv_module_path_var=$shlibpath_var])
  591 if test -n "$lt_cv_module_path_var"; then
  592   m4_pattern_allow([LT_MODULE_PATH_VAR])dnl
  593   AC_DEFINE_UNQUOTED([LT_MODULE_PATH_VAR], ["$lt_cv_module_path_var"],
  594     [Define to the name of the environment variable that determines the run-time module search path.])
  595 fi
  596 ])# LT_SYS_MODULE_PATH
  597 
  598 # Old name:
  599 AU_ALIAS([AC_LTDL_SHLIBPATH], [LT_SYS_MODULE_PATH])
  600 dnl aclocal-1.4 backwards compatibility:
  601 dnl AC_DEFUN([AC_LTDL_SHLIBPATH], [])
  602 
  603 
  604 # LT_SYS_DLSEARCH_PATH
  605 # --------------------
  606 AC_DEFUN([LT_SYS_DLSEARCH_PATH],
  607 [m4_require([_LT_SYS_DYNAMIC_LINKER])dnl
  608 AC_CACHE_CHECK([for the default library search path],
  609   [lt_cv_sys_dlsearch_path],
  610   [lt_cv_sys_dlsearch_path=$sys_lib_dlsearch_path_spec])
  611 if test -n "$lt_cv_sys_dlsearch_path"; then
  612   sys_dlsearch_path=
  613   for dir in $lt_cv_sys_dlsearch_path; do
  614     if test -z "$sys_dlsearch_path"; then
  615       sys_dlsearch_path=$dir
  616     else
  617       sys_dlsearch_path=$sys_dlsearch_path$PATH_SEPARATOR$dir
  618     fi
  619   done
  620   m4_pattern_allow([LT_DLSEARCH_PATH])dnl
  621   AC_DEFINE_UNQUOTED([LT_DLSEARCH_PATH], ["$sys_dlsearch_path"],
  622     [Define to the system default library search path.])
  623 fi
  624 ])# LT_SYS_DLSEARCH_PATH
  625 
  626 # Old name:
  627 AU_ALIAS([AC_LTDL_SYSSEARCHPATH], [LT_SYS_DLSEARCH_PATH])
  628 dnl aclocal-1.4 backwards compatibility:
  629 dnl AC_DEFUN([AC_LTDL_SYSSEARCHPATH], [])
  630 
  631 
  632 # _LT_CHECK_DLPREOPEN
  633 # -------------------
  634 m4_defun([_LT_CHECK_DLPREOPEN],
  635 [m4_require([_LT_CMD_GLOBAL_SYMBOLS])dnl
  636 AC_CACHE_CHECK([whether libtool supports -dlopen/-dlpreopen],
  637   [libltdl_cv_preloaded_symbols],
  638   [if test -n "$lt_cv_sys_global_symbol_pipe"; then
  639     libltdl_cv_preloaded_symbols=yes
  640   else
  641     libltdl_cv_preloaded_symbols=no
  642   fi
  643   ])
  644 if test yes = "$libltdl_cv_preloaded_symbols"; then
  645   AC_DEFINE([HAVE_PRELOADED_SYMBOLS], [1],
  646     [Define if libtool can extract symbol lists from object files.])
  647 fi
  648 ])# _LT_CHECK_DLPREOPEN
  649 
  650 
  651 # LT_LIB_DLLOAD
  652 # -------------
  653 AC_DEFUN([LT_LIB_DLLOAD],
  654 [m4_pattern_allow([^LT_DLLOADERS$])
  655 LT_DLLOADERS=
  656 AC_SUBST([LT_DLLOADERS])
  657 
  658 AC_LANG_PUSH([C])
  659 lt_dlload_save_LIBS=$LIBS
  660 
  661 LIBADD_DLOPEN=
  662 AC_SEARCH_LIBS([dlopen], [dl],
  663 	[AC_DEFINE([HAVE_LIBDL], [1],
  664 		   [Define if you have the libdl library or equivalent.])
  665 	if test "$ac_cv_search_dlopen" != "none required"; then
  666 	  LIBADD_DLOPEN=-ldl
  667 	fi
  668 	libltdl_cv_lib_dl_dlopen=yes
  669 	LT_DLLOADERS="$LT_DLLOADERS ${lt_dlopen_dir+$lt_dlopen_dir/}dlopen.la"],
  670     [AC_LINK_IFELSE([AC_LANG_PROGRAM([[#if HAVE_DLFCN_H
  671 #  include <dlfcn.h>
  672 #endif
  673     ]], [[dlopen(0, 0);]])],
  674 	    [AC_DEFINE([HAVE_LIBDL], [1],
  675 		       [Define if you have the libdl library or equivalent.])
  676 	    libltdl_cv_func_dlopen=yes
  677 	    LT_DLLOADERS="$LT_DLLOADERS ${lt_dlopen_dir+$lt_dlopen_dir/}dlopen.la"],
  678 	[AC_CHECK_LIB([svld], [dlopen],
  679 		[AC_DEFINE([HAVE_LIBDL], [1],
  680 			 [Define if you have the libdl library or equivalent.])
  681 	        LIBADD_DLOPEN=-lsvld libltdl_cv_func_dlopen=yes
  682 		LT_DLLOADERS="$LT_DLLOADERS ${lt_dlopen_dir+$lt_dlopen_dir/}dlopen.la"])])])
  683 if test yes = "$libltdl_cv_func_dlopen" || test yes = "$libltdl_cv_lib_dl_dlopen"
  684 then
  685   lt_save_LIBS=$LIBS
  686   LIBS="$LIBS $LIBADD_DLOPEN"
  687   AC_CHECK_FUNCS([dlerror])
  688   LIBS=$lt_save_LIBS
  689 fi
  690 AC_SUBST([LIBADD_DLOPEN])
  691 
  692 LIBADD_SHL_LOAD=
  693 AC_CHECK_FUNC([shl_load],
  694 	[AC_DEFINE([HAVE_SHL_LOAD], [1],
  695 		   [Define if you have the shl_load function.])
  696 	LT_DLLOADERS="$LT_DLLOADERS ${lt_dlopen_dir+$lt_dlopen_dir/}shl_load.la"],
  697     [AC_CHECK_LIB([dld], [shl_load],
  698 	    [AC_DEFINE([HAVE_SHL_LOAD], [1],
  699 		       [Define if you have the shl_load function.])
  700 	    LT_DLLOADERS="$LT_DLLOADERS ${lt_dlopen_dir+$lt_dlopen_dir/}shl_load.la"
  701 	    LIBADD_SHL_LOAD=-ldld])])
  702 AC_SUBST([LIBADD_SHL_LOAD])
  703 
  704 case $host_os in
  705 darwin[[1567]].*)
  706 # We only want this for pre-Mac OS X 10.4.
  707   AC_CHECK_FUNC([_dyld_func_lookup],
  708 	[AC_DEFINE([HAVE_DYLD], [1],
  709 		   [Define if you have the _dyld_func_lookup function.])
  710 	LT_DLLOADERS="$LT_DLLOADERS ${lt_dlopen_dir+$lt_dlopen_dir/}dyld.la"])
  711   ;;
  712 beos*)
  713   LT_DLLOADERS="$LT_DLLOADERS ${lt_dlopen_dir+$lt_dlopen_dir/}load_add_on.la"
  714   ;;
  715 cygwin* | mingw* | pw32*)
  716   AC_CHECK_DECLS([cygwin_conv_path], [], [], [[#include <sys/cygwin.h>]])
  717   LT_DLLOADERS="$LT_DLLOADERS ${lt_dlopen_dir+$lt_dlopen_dir/}loadlibrary.la"
  718   ;;
  719 esac
  720 
  721 AC_CHECK_LIB([dld], [dld_link],
  722 	[AC_DEFINE([HAVE_DLD], [1],
  723 		   [Define if you have the GNU dld library.])
  724 		LT_DLLOADERS="$LT_DLLOADERS ${lt_dlopen_dir+$lt_dlopen_dir/}dld_link.la"])
  725 AC_SUBST([LIBADD_DLD_LINK])
  726 
  727 m4_pattern_allow([^LT_DLPREOPEN$])
  728 LT_DLPREOPEN=
  729 if test -n "$LT_DLLOADERS"
  730 then
  731   for lt_loader in $LT_DLLOADERS; do
  732     LT_DLPREOPEN="$LT_DLPREOPEN-dlpreopen $lt_loader "
  733   done
  734   AC_DEFINE([HAVE_LIBDLLOADER], [1],
  735             [Define if libdlloader will be built on this platform])
  736 fi
  737 AC_SUBST([LT_DLPREOPEN])
  738 
  739 dnl This isn't used anymore, but set it for backwards compatibility
  740 LIBADD_DL="$LIBADD_DLOPEN $LIBADD_SHL_LOAD"
  741 AC_SUBST([LIBADD_DL])
  742 
  743 LIBS=$lt_dlload_save_LIBS
  744 AC_LANG_POP
  745 ])# LT_LIB_DLLOAD
  746 
  747 # Old name:
  748 AU_ALIAS([AC_LTDL_DLLIB], [LT_LIB_DLLOAD])
  749 dnl aclocal-1.4 backwards compatibility:
  750 dnl AC_DEFUN([AC_LTDL_DLLIB], [])
  751 
  752 
  753 # LT_SYS_SYMBOL_USCORE
  754 # --------------------
  755 # does the compiler prefix global symbols with an underscore?
  756 AC_DEFUN([LT_SYS_SYMBOL_USCORE],
  757 [m4_require([_LT_CMD_GLOBAL_SYMBOLS])dnl
  758 AC_CACHE_CHECK([for _ prefix in compiled symbols],
  759   [lt_cv_sys_symbol_underscore],
  760   [lt_cv_sys_symbol_underscore=no
  761   cat > conftest.$ac_ext <<_LT_EOF
  762 void nm_test_func(){}
  763 int main(){nm_test_func;return 0;}
  764 _LT_EOF
  765   if AC_TRY_EVAL(ac_compile); then
  766     # Now try to grab the symbols.
  767     ac_nlist=conftest.nm
  768     if AC_TRY_EVAL(NM conftest.$ac_objext \| $lt_cv_sys_global_symbol_pipe \> $ac_nlist) && test -s "$ac_nlist"; then
  769       # See whether the symbols have a leading underscore.
  770       if grep '^. _nm_test_func' "$ac_nlist" >/dev/null; then
  771         lt_cv_sys_symbol_underscore=yes
  772       else
  773         if grep '^. nm_test_func ' "$ac_nlist" >/dev/null; then
  774 	  :
  775         else
  776 	  echo "configure: cannot find nm_test_func in $ac_nlist" >&AS_MESSAGE_LOG_FD
  777         fi
  778       fi
  779     else
  780       echo "configure: cannot run $lt_cv_sys_global_symbol_pipe" >&AS_MESSAGE_LOG_FD
  781     fi
  782   else
  783     echo "configure: failed program was:" >&AS_MESSAGE_LOG_FD
  784     cat conftest.c >&AS_MESSAGE_LOG_FD
  785   fi
  786   rm -rf conftest*
  787   ])
  788   sys_symbol_underscore=$lt_cv_sys_symbol_underscore
  789   AC_SUBST([sys_symbol_underscore])
  790 ])# LT_SYS_SYMBOL_USCORE
  791 
  792 # Old name:
  793 AU_ALIAS([AC_LTDL_SYMBOL_USCORE], [LT_SYS_SYMBOL_USCORE])
  794 dnl aclocal-1.4 backwards compatibility:
  795 dnl AC_DEFUN([AC_LTDL_SYMBOL_USCORE], [])
  796 
  797 
  798 # LT_FUNC_DLSYM_USCORE
  799 # --------------------
  800 AC_DEFUN([LT_FUNC_DLSYM_USCORE],
  801 [AC_REQUIRE([_LT_COMPILER_PIC])dnl	for lt_prog_compiler_wl
  802 AC_REQUIRE([LT_SYS_SYMBOL_USCORE])dnl	for lt_cv_sys_symbol_underscore
  803 AC_REQUIRE([LT_SYS_MODULE_EXT])dnl	for libltdl_cv_shlibext
  804 if test yes = "$lt_cv_sys_symbol_underscore"; then
  805   if test yes = "$libltdl_cv_func_dlopen" || test yes = "$libltdl_cv_lib_dl_dlopen"; then
  806     AC_CACHE_CHECK([whether we have to add an underscore for dlsym],
  807       [libltdl_cv_need_uscore],
  808       [libltdl_cv_need_uscore=unknown
  809       dlsym_uscore_save_LIBS=$LIBS
  810       LIBS="$LIBS $LIBADD_DLOPEN"
  811       libname=conftmod # stay within 8.3 filename limits!
  812       cat >$libname.$ac_ext <<_LT_EOF
  813 [#line $LINENO "configure"
  814 #include "confdefs.h"
  815 /* When -fvisibility=hidden is used, assume the code has been annotated
  816    correspondingly for the symbols needed.  */
  817 #if defined __GNUC__ && (((__GNUC__ == 3) && (__GNUC_MINOR__ >= 3)) || (__GNUC__ > 3))
  818 int fnord () __attribute__((visibility("default")));
  819 #endif
  820 int fnord () { return 42; }]
  821 _LT_EOF
  822 
  823       # ltfn_module_cmds module_cmds
  824       # Execute tilde-delimited MODULE_CMDS with environment primed for
  825       # $module_cmds or $archive_cmds type content.
  826       ltfn_module_cmds ()
  827       {( # subshell avoids polluting parent global environment
  828           module_cmds_save_ifs=$IFS; IFS='~'
  829           for cmd in @S|@1; do
  830             IFS=$module_cmds_save_ifs
  831             libobjs=$libname.$ac_objext; lib=$libname$libltdl_cv_shlibext
  832             rpath=/not-exists; soname=$libname$libltdl_cv_shlibext; output_objdir=.
  833             major=; versuffix=; verstring=; deplibs=
  834             ECHO=echo; wl=$lt_prog_compiler_wl; allow_undefined_flag=
  835             eval $cmd
  836           done
  837           IFS=$module_cmds_save_ifs
  838       )}
  839 
  840       # Compile a loadable module using libtool macro expansion results.
  841       $CC $pic_flag -c $libname.$ac_ext
  842       ltfn_module_cmds "${module_cmds:-$archive_cmds}"
  843 
  844       # Try to fetch fnord with dlsym().
  845       libltdl_dlunknown=0; libltdl_dlnouscore=1; libltdl_dluscore=2
  846       cat >conftest.$ac_ext <<_LT_EOF
  847 [#line $LINENO "configure"
  848 #include "confdefs.h"
  849 #if HAVE_DLFCN_H
  850 #include <dlfcn.h>
  851 #endif
  852 #include <stdio.h>
  853 #ifndef RTLD_GLOBAL
  854 #  ifdef DL_GLOBAL
  855 #    define RTLD_GLOBAL DL_GLOBAL
  856 #  else
  857 #    define RTLD_GLOBAL 0
  858 #  endif
  859 #endif
  860 #ifndef RTLD_NOW
  861 #  ifdef DL_NOW
  862 #    define RTLD_NOW DL_NOW
  863 #  else
  864 #    define RTLD_NOW 0
  865 #  endif
  866 #endif
  867 int main () {
  868   void *handle = dlopen ("`pwd`/$libname$libltdl_cv_shlibext", RTLD_GLOBAL|RTLD_NOW);
  869   int status = $libltdl_dlunknown;
  870   if (handle) {
  871     if (dlsym (handle, "fnord"))
  872       status = $libltdl_dlnouscore;
  873     else {
  874       if (dlsym (handle, "_fnord"))
  875         status = $libltdl_dluscore;
  876       else
  877 	puts (dlerror ());
  878     }
  879     dlclose (handle);
  880   } else
  881     puts (dlerror ());
  882   return status;
  883 }]
  884 _LT_EOF
  885       if AC_TRY_EVAL(ac_link) && test -s "conftest$ac_exeext" 2>/dev/null; then
  886         (./conftest; exit; ) >&AS_MESSAGE_LOG_FD 2>/dev/null
  887         libltdl_status=$?
  888         case x$libltdl_status in
  889           x$libltdl_dlnouscore) libltdl_cv_need_uscore=no ;;
  890 	  x$libltdl_dluscore) libltdl_cv_need_uscore=yes ;;
  891 	  x*) libltdl_cv_need_uscore=unknown ;;
  892         esac
  893       fi
  894       rm -rf conftest* $libname*
  895       LIBS=$dlsym_uscore_save_LIBS
  896     ])
  897   fi
  898 fi
  899 
  900 if test yes = "$libltdl_cv_need_uscore"; then
  901   AC_DEFINE([NEED_USCORE], [1],
  902     [Define if dlsym() requires a leading underscore in symbol names.])
  903 fi
  904 ])# LT_FUNC_DLSYM_USCORE
  905 
  906 # Old name:
  907 AU_ALIAS([AC_LTDL_DLSYM_USCORE], [LT_FUNC_DLSYM_USCORE])
  908 dnl aclocal-1.4 backwards compatibility:
  909 dnl AC_DEFUN([AC_LTDL_DLSYM_USCORE], [])