* update all copyright notices to 2000
* doc/libtool.texi (using libltdl): document new lt_dlinfo struct,
replace NULL with @code{NULL}, document lt_dlsetdata(),
lt_dlgetdata() and lt_dlgetinfo()
* libltdl/Makefile.am: increment interface version number
* libltdl/configure.in: set version number to 1.1
* libltdl/ltdl.c: make some variables public by moving them
to the info struct, add support for application specific data
within module handles, new lt_dlsetdata(), lt_dlgetdata() and
lt_dlgetinfo() functions,
fix memory leaks, minor cleanups
* libltdl/ltdl.h: ditto
* mdemo/main.c: demonstrate use of lt_dlgetinfo,
improved handling of errors
* ltconfig.in: set hardcode_into_libs = yes for GNU/Hurd, Linux
and Solaris, only hardcode *all* run-paths if hardcode_into_libs
is set to 'all', otherwise hardcode only user-specified rpaths
into libraries
* ltmain.in: minor cleanups, we don't need to add user-specified
rpaths to compile_rpath, finalize_rpath is sufficient
* ltconfig.in: transform linux* -> *linux-gnu* _after_ host_os has
been set! (reported by Bruno Haible <haible@ilog.fr>)
* configure.in: AC_SUBST reload_flag, deplibs_check_method
and file_magic_cmd
* README: use 'libtool --version' instead of 'ltconfig --version'
(suggested by Francios Pinard <pinard@iro.umontreal.ca>
2000-01-13 08:28:09 +08:00
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## ltdl.m4 - Configure ltdl for the target system. -*-Shell-script-*-
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## Copyright (C) 1999-2000 Free Software Foundation, Inc.
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1999-12-07 18:52:53 +08:00
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##
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## This program is free software; you can redistribute it and/or modify
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## it under the terms of the GNU General Public License as published by
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## the Free Software Foundation; either version 2 of the License, or
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## (at your option) any later version.
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##
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## This program is distributed in the hope that it will be useful, but
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## WITHOUT ANY WARRANTY; without even the implied warranty of
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## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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## General Public License for more details.
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##
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## You should have received a copy of the GNU General Public License
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## along with this program; if not, write to the Free Software
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## Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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##
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## As a special exception to the GNU General Public License, if you
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## distribute this file as part of a program that contains a
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## configuration script generated by Autoconf, you may include it under
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## the same distribution terms that you use for the rest of that program.
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# serial 1 AC_LIB_LTDL
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AC_DEFUN(AC_LIB_LTDL,
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[AC_PREREQ(2.13)dnl
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1999-12-13 21:44:29 +08:00
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AC_REQUIRE([AC_PROG_CC])dnl
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AC_REQUIRE([AC_C_CONST])dnl
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AC_REQUIRE([AC_C_INLINE])dnl
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dnl AC_LIB_LTDL must perform all the checks necessary for compilation
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dnl of the ltdl objects -- including compiler checks (above) and header
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dnl checks (below).
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AC_REQUIRE([AC_HEADER_STDC])dnl
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2000-01-17 23:21:33 +08:00
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AC_CHECK_HEADERS(malloc.h memory.h stdlib.h stdio.h unistd.h ctype.h dlfcn.h dl.h dld.h)
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1999-12-13 21:44:29 +08:00
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AC_CHECK_HEADERS(string.h strings.h, break)
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AC_CHECK_FUNCS(strchr index, break)
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AC_CHECK_FUNCS(strrchr rindex, break)
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1999-12-07 18:52:53 +08:00
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AC_REQUIRE([AC_LTDL_ENABLE_INSTALL])dnl
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AC_REQUIRE([AC_LTDL_SHLIBEXT])dnl
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AC_REQUIRE([AC_LTDL_SHLIBPATH])dnl
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AC_REQUIRE([AC_LTDL_OBJDIR])dnl
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AC_REQUIRE([AC_LTDL_DLPREOPEN])dnl
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AC_REQUIRE([AC_LTDL_DLLIB])dnl
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AC_REQUIRE([AC_LTDL_SYMBOL_USCORE])dnl
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])
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AC_DEFUN(AC_LTDL_ENABLE_INSTALL,
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[AC_ARG_ENABLE(ltdl-install,
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[ --enable-ltdl-install install libltdl])
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AM_CONDITIONAL(INSTALL_LTDL, test x"${enable_ltdl_install-no}" != xno)
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AM_CONDITIONAL(CONVENIENCE_LTDL, test x"${enable_ltdl_convenience-no}" != xno)
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])])
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AC_DEFUN(AC_LTDL_SNARF_CONFIG,
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[# Read the libtool configuration
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rm -f conftest
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./libtool --config > conftest
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. ./conftest
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rm -f conftest
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])
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AC_DEFUN(AC_LTDL_SHLIBEXT,
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[AC_REQUIRE([AC_LTDL_SNARF_CONFIG])dnl
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AC_CACHE_CHECK([which extension is used for shared libraries],
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libltdl_cv_shlibext, [dnl
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(
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last=
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for spec in $library_names_spec; do
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last="$spec"
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done
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changequote(, )
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echo "$last" | sed 's/\[.*\]//;s/^[^.]*//;s/\$.*$//;s/\.$//' > conftest
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changequote([, ])
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)
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libltdl_cv_shlibext=`cat conftest`
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rm -f conftest
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])
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if test -n "$libltdl_cv_shlibext"; then
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AC_DEFINE_UNQUOTED(LTDL_SHLIB_EXT, "$libltdl_cv_shlibext",
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[Define to the extension used for shared libraries, say, ".so". ])
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fi
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])
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AC_DEFUN(AC_LTDL_SHLIBPATH,
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[AC_REQUIRE([AC_LTDL_SNARF_CONFIG])dnl
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AC_CACHE_CHECK([which variable specifies run-time library path],
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libltdl_cv_shlibpath_var, [libltdl_cv_shlibpath_var="$shlibpath_var"])
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if test -n "$libltdl_cv_shlibpath_var"; then
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AC_DEFINE_UNQUOTED(LTDL_SHLIBPATH_VAR, "$libltdl_cv_shlibpath_var",
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[Define to the name of the environment variable that determines the dynamic library search path. ])
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fi
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])
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AC_DEFUN(AC_LTDL_OBJDIR,
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[AC_CACHE_CHECK([for objdir],
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libltdl_cv_objdir, [libltdl_cv_objdir="$objdir"
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if test -n "$objdir"; then
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:
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else
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rm -f .libs 2>/dev/null
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mkdir .libs 2>/dev/null
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if test -d .libs; then
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libltdl_cv_objdir=.libs
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else
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# MS-DOS does not allow filenames that begin with a dot.
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libltdl_cv_objdir=_libs
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fi
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rmdir .libs 2>/dev/null
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fi])
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AC_DEFINE_UNQUOTED(LTDL_OBJDIR, "$libltdl_cv_objdir/",
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[Define to the sub-directory in which libtool stores uninstalled libraries. ])
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])
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AC_DEFUN(AC_LTDL_DLPREOPEN,
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[AC_REQUIRE([AC_LTDL_GLOBAL_SYMBOL_PIPE])dnl
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AC_CACHE_CHECK([whether libtool supports -dlopen/-dlpreopen],
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libltdl_cv_preloaded_symbols, [dnl
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if test -n "$global_symbol_pipe"; then
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libltdl_cv_preloaded_symbols=yes
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else
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libltdl_cv_preloaded_symbols=no
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fi
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])
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if test x"$libltdl_cv_preloaded_symbols" = x"yes"; then
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AC_DEFINE(HAVE_PRELOADED_SYMBOLS, 1,
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[Define if libtool can extract symbol lists from object files. ])
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fi
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])
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AC_DEFUN(AC_LTDL_DLLIB,
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[LIBADD_DL=
|
1999-12-10 07:35:14 +08:00
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AC_CHECK_LIB(dl, dlopen, [AC_DEFINE(HAVE_LIBDL, 1,
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|
[Define if you have the libdl library or equivalent. ]) LIBADD_DL="-ldl"],
|
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[AC_CHECK_FUNC(dlopen, [AC_DEFINE(HAVE_LIBDL, 1,
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[Define if you have the libdl library or equivalent.])])])
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AC_CHECK_FUNC(shl_load, [AC_DEFINE(HAVE_SHL_LOAD, 1,
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|
[Define if you have the shl_load function.])],
|
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[AC_CHECK_LIB(dld, shl_load,
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[AC_DEFINE(HAVE_SHL_LOAD, 1,
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|
[Define if you have the shl_load function.])
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LIBADD_DL="$LIBADD_DL -ldld"])
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|
])
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AC_CHECK_LIB(dld, dld_link, [AC_DEFINE(HAVE_DLD, 1,
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|
[Define if you have the GNU dld library.])dnl
|
1999-12-07 18:52:53 +08:00
|
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|
test "x$ac_cv_lib_dld_shl_load" = yes || LIBADD_DL="$LIBADD_DL -ldld"])
|
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|
AC_SUBST(LIBADD_DL)
|
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|
|
|
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|
if test "x$ac_cv_func_dlopen" = xyes || test "x$ac_cv_lib_dl_dlopen" = xyes; then
|
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|
LIBS_SAVE="$LIBS"
|
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|
LIBS="$LIBS $LIBADD_DL"
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AC_CHECK_FUNCS(dlerror)
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|
LIBS="$LIBS_SAVE"
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|
fi
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])
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AC_DEFUN(AC_LTDL_GLOBAL_SYMBOL_PIPE,
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[dnl Check for command to grab the raw symbol name followed
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dnl by C symbol name from nm.
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AC_REQUIRE([AC_CANONICAL_HOST])dnl
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AC_REQUIRE([AC_PROG_NM])dnl
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# Check for command to grab the raw symbol name followed by C symbol from nm.
|
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|
AC_MSG_CHECKING([command to parse $NM output])
|
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|
AC_CACHE_VAL(ac_cv_sys_global_symbol_pipe,
|
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[# These are sane defaults that work on at least a few old systems.
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# {They come from Ultrix. What could be older than Ultrix?!! ;)}
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changequote(,)dnl
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# Character class describing NM global symbol codes.
|
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|
ac_symcode='[BCDEGRST]'
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# Regexp to match symbols that can be accessed directly from C.
|
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|
ac_sympat='\([_A-Za-z][_A-Za-z0-9]*\)'
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|
|
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|
# Transform the above into a raw symbol and a C symbol.
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|
ac_symxfrm='\1 \2\3 \3'
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|
|
|
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|
|
# Transform an extracted symbol line into a proper C declaration
|
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|
ac_global_symbol_to_cdecl="sed -n -e 's/^. .* \(.*\)$/extern char \1;/p'"
|
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|
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|
# Define system-specific variables.
|
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case "$host_os" in
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|
aix*)
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ac_symcode='[BCDT]'
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|
|
;;
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|
cygwin* | mingw*)
|
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|
ac_symcode='[ABCDGISTW]'
|
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|
;;
|
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|
hpux*)
|
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|
|
ac_global_symbol_to_cdecl="sed -n -e 's/^T .* \(.*\)$/extern char \1();/p' -e 's/^. .* \(.*\)$/extern char \1;/p'"
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|
|
|
;;
|
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|
|
irix*)
|
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|
|
ac_symcode='[BCDEGRST]'
|
|
|
|
;;
|
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|
|
solaris*)
|
|
|
|
ac_symcode='[BDT]'
|
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|
|
;;
|
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|
esac
|
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|
|
|
|
|
|
# If we're using GNU nm, then use its standard symbol codes.
|
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|
|
if $NM -V 2>&1 | egrep '(GNU|with BFD)' > /dev/null; then
|
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|
ac_symcode='[ABCDGISTW]'
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|
fi
|
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|
changequote([,])dnl
|
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|
|
|
|
|
|
# Try without a prefix undercore, then with it.
|
|
|
|
for ac_symprfx in "" "_"; do
|
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|
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ac_cv_sys_global_symbol_pipe="sed -n -e 's/^.*[ ]\($ac_symcode\)[ ][ ]*\($ac_symprfx\)$ac_sympat$/$ac_symxfrm/p'"
|
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|
|
|
|
|
|
# Check to see that the pipe works correctly.
|
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|
ac_pipe_works=no
|
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|
|
rm -f conftest.$ac_ext
|
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|
|
cat > conftest.$ac_ext <<EOF
|
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|
|
#ifdef __cplusplus
|
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|
|
extern "C" {
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|
#endif
|
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char nm_test_var;
|
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|
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void nm_test_func(){}
|
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|
|
#ifdef __cplusplus
|
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|
|
}
|
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|
|
#endif
|
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|
int main(){nm_test_var='a';nm_test_func;return 0;}
|
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|
|
EOF
|
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|
|
|
|
|
|
if AC_TRY_EVAL(ac_compile); then
|
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|
|
# Now try to grab the symbols.
|
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|
|
ac_nlist=conftest.nm
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|
|
|
|
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if AC_TRY_EVAL(NM conftest.$ac_objext \| $ac_cv_sys_global_symbol_pipe \> $ac_nlist) && test -s "$ac_nlist"; then
|
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|
|
|
|
|
|
# Try sorting and uniquifying the output.
|
|
|
|
if sort "$ac_nlist" | uniq > "$ac_nlist"T; then
|
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|
|
mv -f "$ac_nlist"T "$ac_nlist"
|
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|
else
|
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|
|
rm -f "$ac_nlist"T
|
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|
|
fi
|
|
|
|
|
|
|
|
# Make sure that we snagged all the symbols we need.
|
|
|
|
if egrep ' nm_test_var$' "$ac_nlist" >/dev/null; then
|
|
|
|
if egrep ' nm_test_func$' "$ac_nlist" >/dev/null; then
|
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|
|
cat <<EOF > conftest.c
|
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|
|
#ifdef __cplusplus
|
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|
|
extern "C" {
|
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|
|
#endif
|
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|
|
|
|
|
|
EOF
|
|
|
|
# Now generate the symbol file.
|
|
|
|
eval "$ac_global_symbol_to_cdecl"' < "$ac_nlist" >> conftest.c'
|
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|
|
|
|
|
|
cat <<EOF >> conftest.c
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|
#if defined (__STDC__) && __STDC__
|
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|
|
# define lt_ptr_t void *
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|
#else
|
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|
|
# define lt_ptr_t char *
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|
|
# define const
|
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|
|
#endif
|
|
|
|
|
|
|
|
/* The mapping between symbol names and symbols. */
|
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|
|
const struct {
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|
|
const char *name;
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|
|
lt_ptr_t address;
|
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|
|
}
|
|
|
|
changequote(,)dnl
|
|
|
|
lt_preloaded_symbols[] =
|
|
|
|
changequote([,])dnl
|
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|
|
{
|
|
|
|
EOF
|
|
|
|
sed 's/^. \(.*\) \(.*\)$/ {"\2", (lt_ptr_t) \&\2},/' < "$ac_nlist" >> conftest.c
|
|
|
|
cat <<\EOF >> conftest.c
|
|
|
|
{0, (lt_ptr_t) 0}
|
|
|
|
};
|
|
|
|
|
|
|
|
#ifdef __cplusplus
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
EOF
|
|
|
|
# Now try linking the two files.
|
|
|
|
mv conftest.$ac_objext conftstm.$ac_objext
|
|
|
|
ac_save_LIBS="$LIBS"
|
|
|
|
ac_save_CFLAGS="$CFLAGS"
|
|
|
|
LIBS="conftstm.$ac_objext"
|
|
|
|
CFLAGS="$CFLAGS$no_builtin_flag"
|
|
|
|
if AC_TRY_EVAL(ac_link) && test -s conftest; then
|
|
|
|
ac_pipe_works=yes
|
|
|
|
else
|
|
|
|
echo "configure: failed program was:" >&AC_FD_CC
|
|
|
|
cat conftest.c >&AC_FD_CC
|
|
|
|
fi
|
|
|
|
LIBS="$ac_save_LIBS"
|
|
|
|
CFLAGS="$ac_save_CFLAGS"
|
|
|
|
else
|
|
|
|
echo "cannot find nm_test_func in $ac_nlist" >&AC_FD_CC
|
|
|
|
fi
|
|
|
|
else
|
|
|
|
echo "cannot find nm_test_var in $ac_nlist" >&AC_FD_CC
|
|
|
|
fi
|
|
|
|
else
|
|
|
|
echo "cannot run $ac_cv_sys_global_symbol_pipe" >&AC_FD_CC
|
|
|
|
fi
|
|
|
|
else
|
|
|
|
echo "$progname: failed program was:" >&AC_FD_CC
|
|
|
|
cat conftest.c >&AC_FD_CC
|
|
|
|
fi
|
|
|
|
rm -rf conftest* conftst*
|
|
|
|
|
|
|
|
# Do not use the global_symbol_pipe unless it works.
|
|
|
|
if test "$ac_pipe_works" = yes; then
|
|
|
|
if test x"$ac_symprfx" = x"_"; then
|
|
|
|
ac_cv_sys_symbol_underscore=yes
|
|
|
|
else
|
|
|
|
ac_cv_sys_symbol_underscore=no
|
|
|
|
fi
|
|
|
|
break
|
|
|
|
else
|
|
|
|
ac_cv_sys_global_symbol_pipe=
|
|
|
|
fi
|
|
|
|
done
|
|
|
|
])
|
|
|
|
|
|
|
|
ac_result=yes
|
|
|
|
if test -z "$ac_cv_sys_global_symbol_pipe"; then
|
|
|
|
ac_result=no
|
|
|
|
fi
|
|
|
|
AC_MSG_RESULT($ac_result)
|
|
|
|
])
|
|
|
|
|
|
|
|
AC_DEFUN(AC_LTDL_SYMBOL_USCORE,
|
|
|
|
[dnl does the compiler prefix global symbols with an underscore?
|
|
|
|
AC_REQUIRE([AC_LTDL_GLOBAL_SYMBOL_PIPE])dnl
|
|
|
|
AC_MSG_CHECKING([for _ prefix in compiled symbols])
|
|
|
|
AC_CACHE_VAL(ac_cv_sys_symbol_underscore,
|
|
|
|
[ac_cv_sys_symbol_underscore=no
|
|
|
|
cat > conftest.$ac_ext <<EOF
|
|
|
|
void nm_test_func(){}
|
|
|
|
int main(){nm_test_func;return 0;}
|
|
|
|
EOF
|
|
|
|
if AC_TRY_EVAL(ac_compile); then
|
|
|
|
# Now try to grab the symbols.
|
|
|
|
ac_nlist=conftest.nm
|
|
|
|
if AC_TRY_EVAL(NM conftest.$ac_objext \| $ac_cv_sys_global_symbol_pipe \> $ac_nlist) && test -s "$ac_nlist"; then
|
|
|
|
# See whether the symbols have a leading underscore.
|
|
|
|
if egrep '^. _nm_test_func' "$ac_nlist" >/dev/null; then
|
|
|
|
ac_cv_sys_symbol_underscore=yes
|
|
|
|
else
|
|
|
|
if egrep '^. nm_test_func ' "$ac_nlist" >/dev/null; then
|
|
|
|
:
|
|
|
|
else
|
|
|
|
echo "configure: cannot find nm_test_func in $ac_nlist" >&AC_FD_CC
|
|
|
|
fi
|
|
|
|
fi
|
|
|
|
else
|
|
|
|
echo "configure: cannot run $ac_cv_sys_global_symbol_pipe" >&AC_FD_CC
|
|
|
|
fi
|
|
|
|
else
|
|
|
|
echo "configure: failed program was:" >&AC_FD_CC
|
|
|
|
cat conftest.c >&AC_FD_CC
|
|
|
|
fi
|
|
|
|
rm -rf conftest*
|
|
|
|
])
|
|
|
|
AC_MSG_RESULT($ac_cv_sys_symbol_underscore)
|
|
|
|
AC_LTDL_DLSYM_USCORE
|
|
|
|
])
|
|
|
|
|
|
|
|
AC_DEFUN(AC_LTDL_DLSYM_USCORE,
|
|
|
|
[AC_REQUIRE([AC_LTDL_SYMBOL_USCORE])dnl
|
|
|
|
if test x"$ac_cv_sys_symbol_underscore" = xyes; then
|
|
|
|
if test x"$ac_cv_func_dlopen" = xyes ||
|
|
|
|
test x"$ac_cv_lib_dl_dlopen" = xyes ; then
|
|
|
|
AC_CACHE_CHECK([whether we have to add an underscore for dlsym],
|
|
|
|
libltdl_cv_need_uscore, [dnl
|
|
|
|
AC_TRY_RUN([
|
|
|
|
#if HAVE_DLFCN_H
|
|
|
|
#include <dlfcn.h>
|
|
|
|
#endif
|
|
|
|
|
|
|
|
#include <stdio.h>
|
|
|
|
|
|
|
|
#ifdef RTLD_GLOBAL
|
|
|
|
# define LTDL_GLOBAL RTLD_GLOBAL
|
|
|
|
#else
|
|
|
|
# ifdef DL_GLOBAL
|
|
|
|
# define LTDL_GLOBAL DL_GLOBAL
|
|
|
|
# else
|
|
|
|
# define LTDL_GLOBAL 0
|
|
|
|
# endif
|
|
|
|
#endif
|
|
|
|
|
|
|
|
/* We may have to define LTDL_LAZY_OR_NOW in the command line if we
|
|
|
|
find out it does not work in some platform. */
|
|
|
|
#ifndef LTDL_LAZY_OR_NOW
|
|
|
|
# ifdef RTLD_LAZY
|
|
|
|
# define LTDL_LAZY_OR_NOW RTLD_LAZY
|
|
|
|
# else
|
|
|
|
# ifdef DL_LAZY
|
|
|
|
# define LTDL_LAZY_OR_NOW DL_LAZY
|
|
|
|
# else
|
|
|
|
# ifdef RTLD_NOW
|
|
|
|
# define LTDL_LAZY_OR_NOW RTLD_NOW
|
|
|
|
# else
|
|
|
|
# ifdef DL_NOW
|
|
|
|
# define LTDL_LAZY_OR_NOW DL_NOW
|
|
|
|
# else
|
|
|
|
# define LTDL_LAZY_OR_NOW 0
|
|
|
|
# endif
|
|
|
|
# endif
|
|
|
|
# endif
|
|
|
|
# endif
|
|
|
|
#endif
|
|
|
|
|
|
|
|
fnord() { int i=42;}
|
|
|
|
main() { void *self, *ptr1, *ptr2; self=dlopen(0,LTDL_GLOBAL|LTDL_LAZY_OR_NOW);
|
|
|
|
if(self) { ptr1=dlsym(self,"fnord"); ptr2=dlsym(self,"_fnord");
|
|
|
|
if(ptr1 && !ptr2) { dlclose(self); exit(0); } } exit(1); }
|
|
|
|
], libltdl_cv_need_uscore=no, libltdl_cv_need_uscore=yes,
|
|
|
|
libltdl_cv_need_uscore=cross
|
|
|
|
)])
|
|
|
|
fi
|
|
|
|
fi
|
|
|
|
|
|
|
|
if test x"$libltdl_cv_need_uscore" = xyes; then
|
|
|
|
AC_DEFINE(NEED_USCORE, 1,
|
|
|
|
[Define if dlsym() requires a leading underscode in symbol names. ])
|
|
|
|
fi
|
|
|
|
])
|