## ltdl.m4 - Configure ltdl for the target system. -*-Autoconf-*- ## Copyright (C) 1999-2000 Free Software Foundation, Inc. ## ## This program is free software; you can redistribute it and/or modify ## it under the terms of the GNU General Public License as published by ## the Free Software Foundation; either version 2 of the License, or ## (at your option) any later version. ## ## This program is distributed in the hope that it will be useful, but ## WITHOUT ANY WARRANTY; without even the implied warranty of ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU ## General Public License for more details. ## ## You should have received a copy of the GNU General Public License ## along with this program; if not, write to the Free Software ## Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. ## ## As a special exception to the GNU General Public License, if you ## distribute this file as part of a program that contains a ## configuration script generated by Autoconf, you may include it under ## the same distribution terms that you use for the rest of that program. # serial 4 AC_LIB_LTDL # AC_LIB_LTDL # ----------- # Perform all the checks necessary for compilation of the ltdl objects # -- including compiler checks and header checks. AC_DEFUN([AC_LIB_LTDL], [AC_PREREQ(2.50) AC_REQUIRE([AC_PROG_CC]) AC_REQUIRE([AC_C_CONST]) AC_REQUIRE([AC_HEADER_STDC]) AC_REQUIRE([AC_HEADER_DIRENT]) AC_REQUIRE([_LT_AC_CHECK_DLFCN]) AC_REQUIRE([AC_LTDL_ENABLE_INSTALL]) AC_REQUIRE([AC_LTDL_SHLIBEXT]) AC_REQUIRE([AC_LTDL_SHLIBPATH]) AC_REQUIRE([AC_LTDL_SYSSEARCHPATH]) AC_REQUIRE([AC_LTDL_OBJDIR]) AC_REQUIRE([AC_LTDL_DLPREOPEN]) AC_REQUIRE([AC_LTDL_DLLIB]) AC_REQUIRE([AC_LTDL_SYMBOL_USCORE]) AC_REQUIRE([AC_LTDL_DLSYM_USCORE]) AC_REQUIRE([AC_LTDL_SYS_DLOPEN_DEPLIBS]) AC_REQUIRE([AC_LTDL_FUNC_ARGZ]) AC_CHECK_HEADERS([ctype.h errno.h malloc.h memory.h stdlib.h stdio.h]) AC_CHECK_HEADERS([dl.h sys/dl.h dld.h]) AC_CHECK_HEADERS([string.h strings.h], [break]) AC_CHECK_FUNCS([strchr index], [break]) AC_CHECK_FUNCS([strrchr rindex], [break]) AC_CHECK_FUNCS([memcpy bcopy], [break]) AC_CHECK_FUNCS([memmove strcmp]) ])# AC_LIB_LTDL # AC_LTDL_ENABLE_INSTALL # ---------------------- AC_DEFUN([AC_LTDL_ENABLE_INSTALL], [AC_ARG_ENABLE([ltdl-install], [AC_HELP_STRING([--enable-ltdl-install], [install libltdl])]) AM_CONDITIONAL(INSTALL_LTDL, test x"${enable_ltdl_install-no}" != xno) AM_CONDITIONAL(CONVENIENCE_LTDL, test x"${enable_ltdl_convenience-no}" != xno) ])])# AC_LTDL_ENABLE_INSTALL # AC_LTDL_SYS_DLOPEN_DEPLIBS # -------------------------- AC_DEFUN([AC_LTDL_SYS_DLOPEN_DEPLIBS], [AC_REQUIRE([AC_CANONICAL_HOST]) AC_CACHE_CHECK([whether deplibs are loaded by dlopen], [libltdl_cv_sys_dlopen_deplibs], [# PORTME does your system automatically load deplibs for dlopen? # or its logical equivalent (e.g. shl_load for HP-UX < 11) # For now, we just catch OSes we know something about -- in the # future, we'll try test this programmatically. libltdl_cv_sys_dlopen_deplibs=unknown case "$host_os" in aix3*|aix4.1.*|aix4.2.*) # Unknown whether this is true for these versions of AIX, but # we want this `case' here to explicitly catch those versions. libltdl_cv_sys_dlopen_deplibs=unknown ;; aix[45]*) libltdl_cv_sys_dlopen_deplibs=yes ;; gnu*) libltdl_cv_sys_dlopen_deplibs=yes ;; irix[12345]*|irix6.[01]*) # Catch all versions of IRIX before 6.2, and indicate that we don't # know how it worked for any of those versions. libltdl_cv_sys_dlopen_deplibs=unknown ;; irix*) # The case above catches anything before 6.2, and it's known that # at 6.2 and later dlopen does load deplibs. libltdl_cv_sys_dlopen_deplibs=yes ;; linux*) libltdl_cv_sys_dlopen_deplibs=yes ;; netbsd*) libltdl_cv_sys_dlopen_deplibs=yes ;; osf[1234]*) # dlopen did load deplibs (at least at 4.x), but until the 5.x series, # it did *not* use an RPATH in a shared library to find objects the # library depends on, so we explictly say `no'. libltdl_cv_sys_dlopen_deplibs=no ;; osf5.0|osf5.0a|osf5.1) # dlopen *does* load deplibs and with the right loader patch applied # it even uses RPATH in a shared library to search for shared objects # that the library depends on, but there's no easy way to know if that # patch is installed. Since this is the case, all we can really # say is unknown -- it depends on the patch being installed. If # it is, this changes to `yes'. Without it, it would be `no'. libltdl_cv_sys_dlopen_deplibs=unknown ;; osf*) # the two cases above should catch all versions of osf <= 5.1. Read # the comments above for what we know about them. # At > 5.1, deplibs are loaded *and* any RPATH in a shared library # is used to find them so we can finally say `yes'. libltdl_cv_sys_dlopen_deplibs=yes ;; solaris*) libltdl_cv_sys_dlopen_deplibs=yes ;; esac ]) if test "$libltdl_cv_sys_dlopen_deplibs" != yes; then AC_DEFINE([LTDL_DLOPEN_DEPLIBS], [1], [Define if the OS needs help to load dependent libraries for dlopen().]) fi ])# AC_LTDL_SYS_DLOPEN_DEPLIBS # AC_LTDL_SHLIBEXT # ---------------- AC_DEFUN([AC_LTDL_SHLIBEXT], [AC_REQUIRE([AC_LIBTOOL_SYS_DYNAMIC_LINKER]) AC_CACHE_CHECK([which extension is used for shared libraries], [libltdl_cv_shlibext], [ac_last= for ac_spec in $library_names_spec; do ac_last="$ac_spec" done echo "$ac_last" | [sed 's/\[.*\]//;s/^[^.]*//;s/\$.*$//;s/\.$//'] > conftest libltdl_cv_shlibext=`cat conftest` rm -f conftest ]) if test -n "$libltdl_cv_shlibext"; then AC_DEFINE_UNQUOTED(LTDL_SHLIB_EXT, "$libltdl_cv_shlibext", [Define to the extension used for shared libraries, say, ".so".]) fi ])# AC_LTDL_SHLIBEXT # AC_LTDL_SHLIBPATH # ----------------- AC_DEFUN([AC_LTDL_SHLIBPATH], [AC_REQUIRE([AC_LIBTOOL_SYS_DYNAMIC_LINKER]) AC_CACHE_CHECK([which variable specifies run-time library path], [libltdl_cv_shlibpath_var], [libltdl_cv_shlibpath_var="$shlibpath_var"]) if test -n "$libltdl_cv_shlibpath_var"; then AC_DEFINE_UNQUOTED(LTDL_SHLIBPATH_VAR, "$libltdl_cv_shlibpath_var", [Define to the name of the environment variable that determines the dynamic library search path.]) fi ])# AC_LTDL_SHLIBPATH # AC_LTDL_SYSSEARCHPATH # --------------------- AC_DEFUN([AC_LTDL_SYSSEARCHPATH], [AC_REQUIRE([AC_LIBTOOL_SYS_DYNAMIC_LINKER]) AC_CACHE_CHECK([for the default library search path], [libltdl_cv_sys_search_path], [libltdl_cv_sys_search_path="$sys_lib_dlsearch_path_spec"]) if test -n "$libltdl_cv_sys_search_path"; then sys_search_path= for dir in $libltdl_cv_sys_search_path; do if test -z "$sys_search_path"; then sys_search_path="$dir" else sys_search_path="$sys_search_path$ac_path_separator$dir" fi done AC_DEFINE_UNQUOTED(LTDL_SYSSEARCHPATH, "$sys_search_path", [Define to the system default library search path.]) fi ])# AC_LTDL_SYSSEARCHPATH # AC_LTDL_OBJDIR # -------------- AC_DEFUN([AC_LTDL_OBJDIR], [AC_CACHE_CHECK([for objdir], [libltdl_cv_objdir], [libltdl_cv_objdir="$objdir" if test -n "$objdir"; then : else rm -f .libs 2>/dev/null mkdir .libs 2>/dev/null if test -d .libs; then libltdl_cv_objdir=.libs else # MS-DOS does not allow filenames that begin with a dot. libltdl_cv_objdir=_libs fi rmdir .libs 2>/dev/null fi ]) AC_DEFINE_UNQUOTED(LTDL_OBJDIR, "$libltdl_cv_objdir/", [Define to the sub-directory in which libtool stores uninstalled libraries.]) ])# AC_LTDL_OBJDIR # AC_LTDL_DLPREOPEN # ----------------- AC_DEFUN([AC_LTDL_DLPREOPEN], [AC_REQUIRE([AC_LIBTOOL_SYS_GLOBAL_SYMBOL_PIPE]) AC_CACHE_CHECK([whether libtool supports -dlopen/-dlpreopen], [libltdl_cv_preloaded_symbols], [if test -n "$global_symbol_pipe"; then libltdl_cv_preloaded_symbols=yes else libltdl_cv_preloaded_symbols=no fi ]) if test x"$libltdl_cv_preloaded_symbols" = xyes; then AC_DEFINE(HAVE_PRELOADED_SYMBOLS, 1, [Define if libtool can extract symbol lists from object files.]) fi ])# AC_LTDL_DLPREOPEN # AC_LTDL_DLLIB # ------------- AC_DEFUN([AC_LTDL_DLLIB], [LIBADD_DL= AC_SUBST(LIBADD_DL) AC_LANG_PUSH([C]) AC_CHECK_LIB([dl], [dlopen], [AC_DEFINE([HAVE_LIBDL], [1], [Define if you have the libdl library or equivalent.]) LIBADD_DL="-ldl"], [AC_TRY_LINK([#if HAVE_DLFCN_H # include #endif ], [dlopen();], [AC_DEFINE(HAVE_LIBDL, 1, [Define if you have the libdl library or equivalent.])], [AC_CHECK_LIB(svld, dlopen, [AC_DEFINE(HAVE_LIBDL, 1, [Define if you have the libdl library or equivalent.]) LIBADD_DL="-lsvld" ]) ]) ]) AC_CHECK_FUNC(shl_load, [AC_DEFINE([HAVE_SHL_LOAD], [1], [Define if you have the shl_load function.])], [AC_CHECK_LIB([dld], [shl_load], [AC_DEFINE([HAVE_SHL_LOAD], [1], [Define if you have the shl_load function.]) LIBADD_DL="$LIBADD_DL -ldld" ]) ]) AC_CHECK_LIB([dld], [dld_link], [AC_DEFINE([HAVE_DLD], [1], [Define if you have the GNU dld library.]) test x"$ac_cv_lib_dld_shl_load" = xyes || LIBADD_DL="$LIBADD_DL -ldld" ]) if test x"$ac_cv_func_dlopen" = xyes || test x"$ac_cv_lib_dl_dlopen" = xyes then lt_save_LIBS="$LIBS" LIBS="$LIBS $LIBADD_DL" AC_CHECK_FUNCS([dlerror]) LIBS="$lt_save_LIBS" fi AC_LANG_POP ])# AC_LTDL_DLLIB # AC_LTDL_SYMBOL_USCORE # --------------------- # does the compiler prefix global symbols with an underscore? AC_DEFUN([AC_LTDL_SYMBOL_USCORE], [AC_REQUIRE([AC_LIBTOOL_SYS_GLOBAL_SYMBOL_PIPE]) AC_CACHE_CHECK([for _ prefix in compiled symbols], [ac_cv_sys_symbol_underscore], [ac_cv_sys_symbol_underscore=no cat > conftest.$ac_ext < $ac_nlist) && test -s "$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 $global_symbol_pipe" >&AC_FD_CC fi else echo "configure: failed program was:" >&AC_FD_CC cat conftest.c >&AC_FD_CC fi rm -rf conftest* ]) ])# AC_LTDL_SYMBOL_USCORE # AC_LTDL_DLSYM_USCORE # -------------------- AC_DEFUN([AC_LTDL_DLSYM_USCORE], [AC_REQUIRE([AC_LTDL_SYMBOL_USCORE]) if test x"$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], [libltdl_cv_need_uscore=unknown save_LIBS="$LIBS" LIBS="$LIBS $LIBADD_DL" _LT_AC_TRY_DLOPEN_SELF( [libltdl_cv_need_uscore=no], [libltdl_cv_need_uscore=yes], [], [libltdl_cv_need_uscore=cross]) LIBS="$save_LIBS" ]) 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 ])# AC_LTDL_DLSYM_USCORE # AC_LTDL_FUNC_ARGZ # ----------------- AC_DEFUN([AC_LTDL_FUNC_ARGZ], [AC_CHECK_HEADERS([argz.h]) AC_CHECK_TYPES([error_t], [], [AC_DEFINE([error_t], [int], [Define to a type to use for `error_t' if it is not otherwise available.])], [#if HAVE_ARGZ_H # include #endif]) AC_CHECK_FUNCS([argz_append argz_create_sep argz_insert argz_next]) ])# AC_LTDL_FUNC_ARGZ