BUG 4343: Clarify the intent of ldapsam:trusted = yes
[tprouty/samba.git] / source / aclocal.m4
index 13788f99beaa41b9c3c43563c0548c8ca81bce6f..0b9bc0b689c4be123ff353a30f7b39124939e85e 100644 (file)
@@ -1,28 +1,3 @@
-dnl AC_VALIDATE_CACHE_SYSTEM_TYPE[(cmd)]
-dnl if the cache file is inconsistent with the current host,
-dnl target and build system types, execute CMD or print a default
-dnl error message.
-AC_DEFUN(AC_VALIDATE_CACHE_SYSTEM_TYPE, [
-    AC_REQUIRE([AC_CANONICAL_SYSTEM])
-    AC_MSG_CHECKING([config.cache system type])
-    if { test x"${ac_cv_host_system_type+set}" = x"set" &&
-         test x"$ac_cv_host_system_type" != x"$host"; } ||
-       { test x"${ac_cv_build_system_type+set}" = x"set" &&
-         test x"$ac_cv_build_system_type" != x"$build"; } ||
-       { test x"${ac_cv_target_system_type+set}" = x"set" &&
-         test x"$ac_cv_target_system_type" != x"$target"; }; then
-       AC_MSG_RESULT([different])
-       ifelse($#, 1, [$1],
-               [AC_MSG_ERROR(["you must remove config.cache and restart configure"])])
-    else
-       AC_MSG_RESULT([same])
-    fi
-    ac_cv_host_system_type="$host"
-    ac_cv_build_system_type="$build"
-    ac_cv_target_system_type="$target"
-])
-
-
 dnl test whether dirent has a d_off member
 AC_DEFUN(AC_DIRENT_D_OFF,
 [AC_CACHE_CHECK([for d_off in dirent], ac_cv_dirent_d_off,
@@ -32,49 +7,226 @@ AC_DEFUN(AC_DIRENT_D_OFF,
 #include <dirent.h>], [struct dirent d; d.d_off;],
 ac_cv_dirent_d_off=yes, ac_cv_dirent_d_off=no)])
 if test $ac_cv_dirent_d_off = yes; then
-  AC_DEFINE(HAVE_DIRENT_D_OFF)
+  AC_DEFINE(HAVE_DIRENT_D_OFF,1,[Whether dirent has a d_off member])
 fi
 ])
 
-
-dnl AC_PROG_CC_FLAG(flag)
-AC_DEFUN(AC_PROG_CC_FLAG,
-[AC_CACHE_CHECK(whether ${CC-cc} accepts -$1, ac_cv_prog_cc_$1,
-[echo 'void f(){}' > conftest.c
-if test -z "`${CC-cc} -$1 -c conftest.c 2>&1`"; then
-  ac_cv_prog_cc_$1=yes
-else
-  ac_cv_prog_cc_$1=no
-fi
-rm -f conftest*
-])])
-
-dnl see if a declaration exists for a function or variable
-dnl defines HAVE_function_DECL if it exists
-dnl AC_HAVE_DECL(var, includes)
-AC_DEFUN(AC_HAVE_DECL,
+dnl Mark specified module as shared
+dnl SMB_MODULE(name,static_files,shared_files,subsystem,whatif-static,whatif-shared)
+AC_DEFUN(SMB_MODULE,
 [
- AC_CACHE_CHECK([for $1 declaration],ac_cv_have_$1_decl,[
-    AC_TRY_COMPILE([$2],[int i = (int)$1],
-        ac_cv_have_$1_decl=yes,ac_cv_have_$1_decl=no)])
- if test x"$ac_cv_have_$1_decl" = x"yes"; then
-    AC_DEFINE([HAVE_]translit([$1], [a-z], [A-Z])[_DECL])
- fi
+       AC_MSG_CHECKING([how to build $1])
+       if test "$[MODULE_][$1]"; then
+               DEST=$[MODULE_][$1]
+       elif test "$[MODULE_]translit([$4], [A-Z], [a-z])" -a "$[MODULE_DEFAULT_][$1]"; then
+               DEST=$[MODULE_]translit([$4], [A-Z], [a-z])
+       else
+               DEST=$[MODULE_DEFAULT_][$1]
+       fi
+       
+       if test x"$DEST" = xSHARED; then
+               AC_DEFINE([$1][_init], [init_module], [Whether to build $1 as shared module])
+               $4_MODULES="$$4_MODULES $3"
+               AC_MSG_RESULT([shared])
+               [$6]
+               string_shared_modules="$string_shared_modules $1"
+       elif test x"$DEST" = xSTATIC; then
+               [init_static_modules_]translit([$4], [A-Z], [a-z])="$[init_static_modules_]translit([$4], [A-Z], [a-z])  $1_init();"
+               [decl_static_modules_]translit([$4], [A-Z], [a-z])="$[decl_static_modules_]translit([$4], [A-Z], [a-z]) extern NTSTATUS $1_init(void);"
+               string_static_modules="$string_static_modules $1"
+               $4_STATIC="$$4_STATIC $2"
+               AC_SUBST($4_STATIC)
+               [$5]
+               AC_MSG_RESULT([static])
+       else
+           string_ignored_modules="$string_ignored_modules $1"
+               AC_MSG_RESULT([not])
+       fi
 ])
 
+AC_DEFUN(SMB_SUBSYSTEM,
+[
+       AC_SUBST($1_STATIC)
+       AC_SUBST($1_MODULES)
+       AC_DEFINE_UNQUOTED([static_init_]translit([$1], [A-Z], [a-z]), [{$init_static_modules_]translit([$1], [A-Z], [a-z])[}], [Static init functions])
+       AC_DEFINE_UNQUOTED([static_decl_]translit([$1], [A-Z], [a-z]), [$decl_static_modules_]translit([$1], [A-Z], [a-z]), [Decl of Static init functions])
+       ifelse([$2], , :, [rm -f $2])
+])
 
-dnl check for a function in a library, but don't
-dnl keep adding the same library to the LIBS variable.
-dnl AC_LIBTESTFUNC(lib,func)
-AC_DEFUN(AC_LIBTESTFUNC,
-[case "$LIBS" in
-  *-l$1*) AC_CHECK_FUNCS($2) ;;
-  *) AC_CHECK_LIB($1, $2) 
-     AC_CHECK_FUNCS($2)
-  ;;
-  esac
+dnl AC_LIBTESTFUNC(lib, function, [actions if found], [actions if not found])
+dnl Check for a function in a library, but don't keep adding the same library
+dnl to the LIBS variable.  Check whether the function is available in the
+dnl current LIBS before adding the library which prevents us spuriously
+dnl adding libraries for symbols that are in libc.
+dnl
+dnl On success, the default actions ensure that HAVE_FOO is defined. The lib
+dnl is always added to $LIBS if it was found to be necessary. The caller
+dnl can use SMB_REMOVE_LIB to strp this if necessary.
+AC_DEFUN([AC_LIBTESTFUNC],
+[
+  AC_CHECK_FUNCS($2,
+      [
+        # $2 was found in libc or existing $LIBS
+       m4_ifval([$3],
+           [
+               $3
+           ],
+           [
+               AC_DEFINE(translit([HAVE_$2], [a-z], [A-Z]), 1,
+                   [Whether $2 is available])
+           ])
+      ],
+      [
+        # $2 was not found, try adding lib$1
+       case " $LIBS " in
+          *\ -l$1\ *)
+           m4_ifval([$4],
+               [
+                   $4
+               ],
+               [
+                   # $2 was not found and we already had lib$1
+                   # nothing to do here by default
+                   true
+               ])
+           ;;
+          *)
+           # $2 was not found, try adding lib$1
+           AC_CHECK_LIB($1, $2,
+             [
+               LIBS="-l$1 $LIBS"
+               m4_ifval([$3],
+                   [
+                       $3
+                   ],
+                   [
+                       AC_DEFINE(translit([HAVE_$2], [a-z], [A-Z]), 1,
+                           [Whether $2 is available])
+                   ])
+             ],
+             [
+               m4_ifval([$4],
+                   [
+                       $4
+                   ],
+                   [
+                       # $2 was not found in lib$1
+                       # nothing to do here by default
+                       true
+                   ])
+             ])
+         ;;
+        esac
+      ])
 ])
 
+# AC_CHECK_LIB_EXT(LIBRARY, [EXT_LIBS], [FUNCTION],
+#              [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND],
+#              [ADD-ACTION-IF-FOUND],[OTHER-LIBRARIES])
+# ------------------------------------------------------
+#
+# Use a cache variable name containing both the library and function name,
+# because the test really is for library $1 defining function $3, not
+# just for library $1.  Separate tests with the same $1 and different $3s
+# may have different results.
+#
+# Note that using directly AS_VAR_PUSHDEF([ac_Lib], [ac_cv_lib_$1_$3])
+# is asking for trouble, since AC_CHECK_LIB($lib, fun) would give
+# ac_cv_lib_$lib_fun, which is definitely not what was meant.  Hence
+# the AS_LITERAL_IF indirection.
+#
+# FIXME: This macro is extremely suspicious.  It DEFINEs unconditionally,
+# whatever the FUNCTION, in addition to not being a *S macro.  Note
+# that the cache does depend upon the function we are looking for.
+#
+# It is on purpose we used `ac_check_lib_ext_save_LIBS' and not just
+# `ac_save_LIBS': there are many macros which don't want to see `LIBS'
+# changed but still want to use AC_CHECK_LIB_EXT, so they save `LIBS'.
+# And ``ac_save_LIBS' is too tempting a name, so let's leave them some
+# freedom.
+AC_DEFUN([AC_CHECK_LIB_EXT],
+[
+AH_CHECK_LIB_EXT([$1])
+ac_check_lib_ext_save_LIBS=$LIBS
+LIBS="-l$1 $$2 $7 $LIBS"
+AS_LITERAL_IF([$1],
+      [AS_VAR_PUSHDEF([ac_Lib_ext], [ac_cv_lib_ext_$1])],
+      [AS_VAR_PUSHDEF([ac_Lib_ext], [ac_cv_lib_ext_$1''])])dnl
+
+m4_ifval([$3],
+ [
+    AH_CHECK_FUNC_EXT([$3])
+    AS_LITERAL_IF([$1],
+              [AS_VAR_PUSHDEF([ac_Lib_func], [ac_cv_lib_ext_$1_$3])],
+              [AS_VAR_PUSHDEF([ac_Lib_func], [ac_cv_lib_ext_$1''_$3])])dnl
+    AC_CACHE_CHECK([for $3 in -l$1], ac_Lib_func,
+       [AC_TRY_LINK_FUNC($3,
+                 [AS_VAR_SET(ac_Lib_func, yes);
+                 AS_VAR_SET(ac_Lib_ext, yes)],
+                 [AS_VAR_SET(ac_Lib_func, no);
+                 AS_VAR_SET(ac_Lib_ext, no)])
+       ])
+    AS_IF([test AS_VAR_GET(ac_Lib_func) = yes],
+        [AC_DEFINE_UNQUOTED(AS_TR_CPP(HAVE_$3))])dnl
+    AS_VAR_POPDEF([ac_Lib_func])dnl
+ ],[
+    AC_CACHE_CHECK([for -l$1], ac_Lib_ext,
+       [AC_TRY_LINK_FUNC([main],
+                 [AS_VAR_SET(ac_Lib_ext, yes)],
+                 [AS_VAR_SET(ac_Lib_ext, no)])
+       ])
+ ])
+LIBS=$ac_check_lib_ext_save_LIBS
+
+AS_IF([test AS_VAR_GET(ac_Lib_ext) = yes],
+    [m4_default([$4], 
+        [AC_DEFINE_UNQUOTED(AS_TR_CPP(HAVE_LIB$1))
+               case "$$2" in
+                   *-l$1*)
+                       ;;
+                   *)
+                       $2="-l$1 $$2"
+                       ;;
+               esac])
+               [$6]
+           ],
+           [$5])dnl
+AS_VAR_POPDEF([ac_Lib_ext])dnl
+])# AC_CHECK_LIB_EXT
+
+# AH_CHECK_LIB_EXT(LIBNAME)
+# ---------------------
+m4_define([AH_CHECK_LIB_EXT],
+[AH_TEMPLATE(AS_TR_CPP(HAVE_LIB$1),
+             [Define to 1 if you have the `]$1[' library (-l]$1[).])])
+
+# AC_CHECK_FUNCS_EXT(FUNCTION, [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])
+# -----------------------------------------------------------------
+dnl check for a function in a $LIBS and $OTHER_LIBS libraries variable.
+dnl AC_CHECK_FUNC_EXT(func,OTHER_LIBS,IF-TRUE,IF-FALSE)
+AC_DEFUN([AC_CHECK_FUNC_EXT],
+[
+    AH_CHECK_FUNC_EXT($1)      
+    ac_check_func_ext_save_LIBS=$LIBS
+    LIBS="$2 $LIBS"
+    AS_VAR_PUSHDEF([ac_var], [ac_cv_func_ext_$1])dnl
+    AC_CACHE_CHECK([for $1], ac_var,
+       [AC_LINK_IFELSE([AC_LANG_FUNC_LINK_TRY([$1])],
+                [AS_VAR_SET(ac_var, yes)],
+                [AS_VAR_SET(ac_var, no)])])
+    LIBS=$ac_check_func_ext_save_LIBS
+    AS_IF([test AS_VAR_GET(ac_var) = yes], 
+           [AC_DEFINE_UNQUOTED(AS_TR_CPP([HAVE_$1])) $3], 
+           [$4])dnl
+AS_VAR_POPDEF([ac_var])dnl
+])# AC_CHECK_FUNC
+
+# AH_CHECK_FUNC_EXT(FUNCNAME)
+# ---------------------
+m4_define([AH_CHECK_FUNC_EXT],
+[AH_TEMPLATE(AS_TR_CPP(HAVE_$1),
+             [Define to 1 if you have the `]$1[' function.])])
+
 dnl Define an AC_DEFINE with ifndef guard.
 dnl AC_N_DEFINE(VARIABLE [, VALUE])
 define(AC_N_DEFINE,
@@ -93,167 +245,203 @@ define(AC_ADD_INCLUDE,
 EOF
 ])
 
-## libtool.m4 - Configure libtool for the target system. -*-Shell-script-*-
-## Copyright (C) 1996-1999 Free Software Foundation, Inc.
-## Originally by Gordon Matzigkeit <gord@gnu.ai.mit.edu>, 1996
-##
-## 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 40 AC_PROG_LIBTOOL
-AC_DEFUN(AC_PROG_LIBTOOL,
-[AC_REQUIRE([AC_LIBTOOL_SETUP])dnl
-
-# Save cache, so that ltconfig can load it
-AC_CACHE_SAVE
-
-# Actually configure libtool.  ac_aux_dir is where install-sh is found.
-CC="$CC" CFLAGS="$CFLAGS" CPPFLAGS="$CPPFLAGS" \
-LD="$LD" LDFLAGS="$LDFLAGS" LIBS="$LIBS" \
-LN_S="$LN_S" NM="$NM" RANLIB="$RANLIB" \
-DLLTOOL="$DLLTOOL" AS="$AS" OBJDUMP="$OBJDUMP" \
-${CONFIG_SHELL-/bin/sh} $ac_aux_dir/ltconfig --no-reexec \
-$libtool_flags --no-verify $ac_aux_dir/ltmain.sh $lt_target \
-|| AC_MSG_ERROR([libtool configure failed])
-
-# Reload cache, that may have been modified by ltconfig
-AC_CACHE_LOAD
-
-# This can be used to rebuild libtool when needed
-LIBTOOL_DEPS="$ac_aux_dir/ltconfig $ac_aux_dir/ltmain.sh"
-
-# Always use our own libtool.
-LIBTOOL='$(SHELL) $(top_builddir)/libtool'
-AC_SUBST(LIBTOOL)dnl
-
-# Redirect the config.log output again, so that the ltconfig log is not
-# clobbered by the next message.
-exec 5>>./config.log
+dnl Copied from libtool.m4
+AC_DEFUN(AC_PROG_LD_GNU,
+[AC_CACHE_CHECK([if the linker ($LD) is GNU ld], ac_cv_prog_gnu_ld,
+[# I'd rather use --version here, but apparently some GNU ld's only accept -v.
+if $LD -v 2>&1 </dev/null | egrep '(GNU|with BFD)' 1>&5; then
+  ac_cv_prog_gnu_ld=yes
+else
+  ac_cv_prog_gnu_ld=no
+fi])
 ])
 
-AC_DEFUN(AC_LIBTOOL_SETUP,
-[AC_PREREQ(2.13)dnl
-AC_REQUIRE([AC_ENABLE_SHARED])dnl
-AC_REQUIRE([AC_ENABLE_STATIC])dnl
-AC_REQUIRE([AC_ENABLE_FAST_INSTALL])dnl
-AC_REQUIRE([AC_CANONICAL_HOST])dnl
-AC_REQUIRE([AC_CANONICAL_BUILD])dnl
-AC_REQUIRE([AC_PROG_RANLIB])dnl
-AC_REQUIRE([AC_PROG_CC])dnl
-AC_REQUIRE([AC_PROG_LD])dnl
-AC_REQUIRE([AC_PROG_NM])dnl
-AC_REQUIRE([AC_PROG_LN_S])dnl
-dnl
+dnl Removes -I/usr/include/? from given variable
+AC_DEFUN(CFLAGS_REMOVE_USR_INCLUDE,[
+  ac_new_flags=""
+  for i in [$]$1; do
+    case [$]i in
+    -I/usr/include|-I/usr/include/) ;;
+    *) ac_new_flags="[$]ac_new_flags [$]i" ;;
+    esac
+  done
+  $1=[$]ac_new_flags
+])
 
-case "$target" in
-NONE) lt_target="$host" ;;
-*) lt_target="$target" ;;
-esac
-
-# Check for any special flags to pass to ltconfig.
-libtool_flags="--cache-file=$cache_file"
-test "$enable_shared" = no && libtool_flags="$libtool_flags --disable-shared"
-test "$enable_static" = no && libtool_flags="$libtool_flags --disable-static"
-test "$enable_fast_install" = no && libtool_flags="$libtool_flags --disable-fast-install"
-test "$ac_cv_prog_gcc" = yes && libtool_flags="$libtool_flags --with-gcc"
-test "$ac_cv_prog_gnu_ld" = yes && libtool_flags="$libtool_flags --with-gnu-ld"
-ifdef([AC_PROVIDE_AC_LIBTOOL_DLOPEN],
-[libtool_flags="$libtool_flags --enable-dlopen"])
-ifdef([AC_PROVIDE_AC_LIBTOOL_WIN32_DLL],
-[libtool_flags="$libtool_flags --enable-win32-dll"])
-AC_ARG_ENABLE(libtool-lock,
-  [  --disable-libtool-lock  avoid locking (might break parallel builds)])
-test "x$enable_libtool_lock" = xno && libtool_flags="$libtool_flags --disable-lock"
-test x"$silent" = xyes && libtool_flags="$libtool_flags --silent"
-
-# Some flags need to be propagated to the compiler or linker for good
-# libtool support.
-case "$lt_target" in
-*-*-irix6*)
-  # Find out which ABI we are using.
-  echo '[#]line __oline__ "configure"' > conftest.$ac_ext
-  if AC_TRY_EVAL(ac_compile); then
-    case "`/usr/bin/file conftest.o`" in
-    *32-bit*)
-      LD="${LD-ld} -32"
-      ;;
-    *N32*)
-      LD="${LD-ld} -n32"
-      ;;
-    *64-bit*)
-      LD="${LD-ld} -64"
-      ;;
+dnl Removes '-L/usr/lib[/]', '-Wl,-rpath,/usr/lib[/]'
+dnl and '-Wl,-rpath -Wl,/usr/lib[/]' from given variable
+AC_DEFUN(LIB_REMOVE_USR_LIB,[
+  ac_new_flags=""
+  l=""
+  for i in [$]$1; do
+    case [$]l[$]i in
+    -L/usr/lib) ;;
+    -L/usr/lib/) ;;
+    -Wl,-rpath,/usr/lib) ;;
+    -Wl,-rpath,/usr/lib/) ;;
+    -Wl,-rpath) l=[$]i;;
+    -Wl,-rpath-Wl,/usr/lib) l="";;
+    -Wl,-rpath-Wl,/usr/lib/) l="";;
+    *)
+       s=" "
+        if test x"[$]ac_new_flags" = x""; then
+            s="";
+       fi
+        if test x"[$]l" = x""; then
+            ac_new_flags="[$]ac_new_flags[$]s[$]i";
+        else
+            ac_new_flags="[$]ac_new_flags[$]s[$]l [$]i";
+        fi
+        l=""
+        ;;
     esac
-  fi
-  rm -rf conftest*
-  ;;
+  done
+  $1=[$]ac_new_flags
+])
 
-*-*-sco3.2v5*)
-  # On SCO OpenServer 5, we need -belf to get full-featured binaries.
-  SAVE_CFLAGS="$CFLAGS"
-  CFLAGS="$CFLAGS -belf"
-  AC_CACHE_CHECK([whether the C compiler needs -belf], lt_cv_cc_needs_belf,
-    [AC_TRY_LINK([],[],[lt_cv_cc_needs_belf=yes],[lt_cv_cc_needs_belf=no])])
-  if test x"$lt_cv_cc_needs_belf" != x"yes"; then
-    # this is probably gcc 2.8.0, egcs 1.0 or newer; no need for -belf
-    CFLAGS="$SAVE_CFLAGS"
-  fi
-  ;;
+dnl From Bruno Haible.
 
-ifdef([AC_PROVIDE_AC_LIBTOOL_WIN32_DLL],
-[*-*-cygwin* | *-*-mingw*)
-  AC_CHECK_TOOL(DLLTOOL, dlltool, false)
-  AC_CHECK_TOOL(AS, as, false)
-  AC_CHECK_TOOL(OBJDUMP, objdump, false)
-  ;;
+AC_DEFUN(jm_ICONV,
+[
+  dnl Some systems have iconv in libc, some have it in libiconv (OSF/1 and
+  dnl those with the standalone portable libiconv installed).
+  AC_MSG_CHECKING(for iconv in $1)
+    jm_cv_func_iconv="no"
+    jm_cv_lib_iconv=""
+    jm_cv_giconv=no
+    jm_save_LIBS="$LIBS"
+
+    dnl Check for include in funny place but no lib needed
+    if test "$jm_cv_func_iconv" != yes; then 
+      AC_TRY_LINK([#include <stdlib.h>
+#include <giconv.h>],
+        [iconv_t cd = iconv_open("","");
+         iconv(cd,NULL,NULL,NULL,NULL);
+         iconv_close(cd);],
+         jm_cv_func_iconv=yes
+         jm_cv_include="giconv.h"
+         jm_cv_giconv="yes"
+         jm_cv_lib_iconv="")
+
+      dnl Standard iconv.h include, lib in glibc or libc ...
+      if test "$jm_cv_func_iconv" != yes; then
+        AC_TRY_LINK([#include <stdlib.h>
+#include <iconv.h>],
+          [iconv_t cd = iconv_open("","");
+           iconv(cd,NULL,NULL,NULL,NULL);
+           iconv_close(cd);],
+           jm_cv_include="iconv.h"
+           jm_cv_func_iconv=yes
+           jm_cv_lib_iconv="")
+
+          if test "$jm_cv_lib_iconv" != yes; then
+            jm_save_LIBS="$LIBS"
+            LIBS="$LIBS -lgiconv"
+            AC_TRY_LINK([#include <stdlib.h>
+#include <giconv.h>],
+              [iconv_t cd = iconv_open("","");
+               iconv(cd,NULL,NULL,NULL,NULL);
+               iconv_close(cd);],
+              jm_cv_lib_iconv=yes
+              jm_cv_func_iconv=yes
+              jm_cv_include="giconv.h"
+              jm_cv_giconv=yes
+              jm_cv_lib_iconv="giconv")
+
+           LIBS="$jm_save_LIBS"
+
+        if test "$jm_cv_func_iconv" != yes; then
+          jm_save_LIBS="$LIBS"
+          LIBS="$LIBS -liconv"
+          AC_TRY_LINK([#include <stdlib.h>
+#include <iconv.h>],
+            [iconv_t cd = iconv_open("","");
+             iconv(cd,NULL,NULL,NULL,NULL);
+             iconv_close(cd);],
+            jm_cv_include="iconv.h"
+            jm_cv_func_iconv=yes
+            jm_cv_lib_iconv="iconv")
+          LIBS="$jm_save_LIBS"
+        fi
+      fi
+    fi
+  fi
+  if test "$jm_cv_func_iconv" = yes; then
+    if test "$jm_cv_giconv" = yes; then
+      AC_DEFINE(HAVE_GICONV, 1, [What header to include for iconv() function: giconv.h])
+      AC_MSG_RESULT(yes)
+      ICONV_FOUND=yes
+    else
+      if test "$jm_cv_biconv" = yes; then
+        AC_DEFINE(HAVE_BICONV, 1, [What header to include for iconv() function: biconv.h])
+        AC_MSG_RESULT(yes)
+        ICONV_FOUND=yes
+      else 
+        AC_DEFINE(HAVE_ICONV, 1, [What header to include for iconv() function: iconv.h])
+        AC_MSG_RESULT(yes)
+        ICONV_FOUND=yes
+      fi
+    fi
+  else
+    AC_MSG_RESULT(no)
+  fi
 ])
-esac
+
+AC_DEFUN(rjs_CHARSET,[
+  dnl Find out if we can convert from $1 to UCS2-LE
+  AC_MSG_CHECKING([can we convert from $1 to UCS2-LE?])
+  AC_TRY_RUN([
+#include <$jm_cv_include>
+main(){
+    iconv_t cd = iconv_open("$1", "UCS-2LE");
+    if (cd == 0 || cd == (iconv_t)-1) {
+       return -1;
+    }
+    return 0;
+}
+  ],ICONV_CHARSET=$1,ICONV_CHARSET=no,ICONV_CHARSET=cross)
+  AC_MSG_RESULT($ICONV_CHARSET)
 ])
 
-# AC_LIBTOOL_DLOPEN - enable checks for dlopen support
-AC_DEFUN(AC_LIBTOOL_DLOPEN, [AC_BEFORE([$0],[AC_LIBTOOL_SETUP])])
+dnl CFLAGS_ADD_DIR(CFLAGS, $INCDIR)
+dnl This function doesn't add -I/usr/include into CFLAGS
+AC_DEFUN(CFLAGS_ADD_DIR,[
+if test "$2" != "/usr/include" ; then
+    $1="$$1 -I$2"
+fi
+])
 
-# AC_LIBTOOL_WIN32_DLL - declare package support for building win32 dll's
-AC_DEFUN(AC_LIBTOOL_WIN32_DLL, [AC_BEFORE([$0], [AC_LIBTOOL_SETUP])])
+dnl LIB_ADD_DIR(LDFLAGS, $LIBDIR)
+dnl This function doesn't add -L/usr/lib into LDFLAGS
+AC_DEFUN(LIB_ADD_DIR,[
+if test "$2" != "/usr/lib" ; then
+    $1="$$1 -L$2"
+fi
+])
 
-# AC_ENABLE_SHARED - implement the --enable-shared flag
-# Usage: AC_ENABLE_SHARED[(DEFAULT)]
-#   Where DEFAULT is either `yes' or `no'.  If omitted, it defaults to
-#   `yes'.
-AC_DEFUN(AC_ENABLE_SHARED, [dnl
-define([AC_ENABLE_SHARED_DEFAULT], ifelse($1, no, no, yes))dnl
+dnl AC_ENABLE_SHARED - implement the --enable-shared flag
+dnl Usage: AC_ENABLE_SHARED[(DEFAULT)]
+dnl   Where DEFAULT is either `yes' or `no'.  If omitted, it defaults to
+dnl   `yes'.
+AC_DEFUN([AC_ENABLE_SHARED],
+[define([AC_ENABLE_SHARED_DEFAULT], ifelse($1, no, no, yes))dnl
 AC_ARG_ENABLE(shared,
 changequote(<<, >>)dnl
-<<  --enable-shared[=PKGS]  build shared libraries [default=>>AC_ENABLE_SHARED_DEFAULT],
+<<  --enable-shared[=PKGS]    build shared libraries [default=>>AC_ENABLE_SHARED_DEFAULT],
 changequote([, ])dnl
 [p=${PACKAGE-default}
-case "$enableval" in
+case $enableval in
 yes) enable_shared=yes ;;
 no) enable_shared=no ;;
 *)
   enable_shared=no
   # Look at the argument we got.  We use all the common list separators.
-  IFS="${IFS=  }"; ac_save_ifs="$IFS"; IFS="${IFS}:,"
+  IFS="${IFS=   }"; ac_save_ifs="$IFS"; IFS="${IFS}:,"
   for pkg in $enableval; do
     if test "X$pkg" = "X$p"; then
       enable_shared=yes
     fi
+
   done
   IFS="$ac_save_ifs"
   ;;
@@ -261,28 +449,24 @@ esac],
 enable_shared=AC_ENABLE_SHARED_DEFAULT)dnl
 ])
 
-# AC_DISABLE_SHARED - set the default shared flag to --disable-shared
-AC_DEFUN(AC_DISABLE_SHARED, [AC_BEFORE([$0],[AC_LIBTOOL_SETUP])dnl
-AC_ENABLE_SHARED(no)])
-
-# AC_ENABLE_STATIC - implement the --enable-static flag
-# Usage: AC_ENABLE_STATIC[(DEFAULT)]
-#   Where DEFAULT is either `yes' or `no'.  If omitted, it defaults to
-#   `yes'.
-AC_DEFUN(AC_ENABLE_STATIC, [dnl
-define([AC_ENABLE_STATIC_DEFAULT], ifelse($1, no, no, yes))dnl
+dnl AC_ENABLE_STATIC - implement the --enable-static flag
+dnl Usage: AC_ENABLE_STATIC[(DEFAULT)]
+dnl   Where DEFAULT is either `yes' or `no'.  If omitted, it defaults to
+dnl   `yes'.
+AC_DEFUN([AC_ENABLE_STATIC],
+[define([AC_ENABLE_STATIC_DEFAULT], ifelse($1, no, no, yes))dnl
 AC_ARG_ENABLE(static,
 changequote(<<, >>)dnl
-<<  --enable-static[=PKGS]  build static libraries [default=>>AC_ENABLE_STATIC_DEFAULT],
+<<  --enable-static[=PKGS]    build static libraries [default=>>AC_ENABLE_STATIC_DEFAULT],
 changequote([, ])dnl
 [p=${PACKAGE-default}
-case "$enableval" in
+case $enableval in
 yes) enable_static=yes ;;
 no) enable_static=no ;;
 *)
   enable_static=no
   # Look at the argument we got.  We use all the common list separators.
-  IFS="${IFS=  }"; ac_save_ifs="$IFS"; IFS="${IFS}:,"
+  IFS="${IFS=   }"; ac_save_ifs="$IFS"; IFS="${IFS}:,"
   for pkg in $enableval; do
     if test "X$pkg" = "X$p"; then
       enable_static=yes
@@ -294,232 +478,302 @@ esac],
 enable_static=AC_ENABLE_STATIC_DEFAULT)dnl
 ])
 
-# AC_DISABLE_STATIC - set the default static flag to --disable-static
-AC_DEFUN(AC_DISABLE_STATIC, [AC_BEFORE([$0],[AC_LIBTOOL_SETUP])dnl
+dnl AC_DISABLE_STATIC - set the default static flag to --disable-static
+AC_DEFUN([AC_DISABLE_STATIC],
+[AC_BEFORE([$0],[AC_LIBTOOL_SETUP])dnl
 AC_ENABLE_STATIC(no)])
 
+dnl AC_TRY_RUN_STRICT(PROGRAM,CFLAGS,CPPFLAGS,LDFLAGS,
+dnl            [ACTION-IF-TRUE],[ACTION-IF-FALSE],
+dnl            [ACTION-IF-CROSS-COMPILING = RUNTIME-ERROR])
+AC_DEFUN( [AC_TRY_RUN_STRICT],
+[
+       old_CFLAGS="$CFLAGS";
+       CFLAGS="$2";
+       export CFLAGS;
+       old_CPPFLAGS="$CPPFLAGS";
+       CPPFLAGS="$3";
+       export CPPFLAGS;
+       old_LDFLAGS="$LDFLAGS";
+       LDFLAGS="$4";
+       export LDFLAGS;
+       AC_TRY_RUN([$1],[$5],[$6],[$7])
+       CFLAGS="$old_CFLAGS";
+       old_CFLAGS="";
+       export CFLAGS;
+       CPPFLAGS="$old_CPPFLAGS";
+       old_CPPFLAGS="";
+       export CPPFLAGS;
+       LDFLAGS="$old_LDFLAGS";
+       old_LDFLAGS="";
+       export LDFLAGS;
+])
 
-# AC_ENABLE_FAST_INSTALL - implement the --enable-fast-install flag
-# Usage: AC_ENABLE_FAST_INSTALL[(DEFAULT)]
-#   Where DEFAULT is either `yes' or `no'.  If omitted, it defaults to
-#   `yes'.
-AC_DEFUN(AC_ENABLE_FAST_INSTALL, [dnl
-define([AC_ENABLE_FAST_INSTALL_DEFAULT], ifelse($1, no, no, yes))dnl
-AC_ARG_ENABLE(fast-install,
-changequote(<<, >>)dnl
-<<  --enable-fast-install[=PKGS]  optimize for fast installation [default=>>AC_ENABLE_FAST_INSTALL_DEFAULT],
-changequote([, ])dnl
-[p=${PACKAGE-default}
-case "$enableval" in
-yes) enable_fast_install=yes ;;
-no) enable_fast_install=no ;;
-*)
-  enable_fast_install=no
-  # Look at the argument we got.  We use all the common list separators.
-  IFS="${IFS=  }"; ac_save_ifs="$IFS"; IFS="${IFS}:,"
-  for pkg in $enableval; do
-    if test "X$pkg" = "X$p"; then
-      enable_fast_install=yes
+dnl SMB_CHECK_SYSCONF(varname)
+dnl Tests whether the sysconf(3) variable "varname" is available.
+AC_DEFUN([SMB_CHECK_SYSCONF],
+[
+    AC_CACHE_CHECK([for sysconf($1)],
+       samba_cv_SYSCONF$1,
+       [
+           AC_TRY_LINK([#include <unistd.h>],
+               [ return sysconf($1) == -1 ? 1 : 0; ],
+               [ samba_cv_SYSCONF$1=yes ],
+               [ samba_cv_SYSCONF$1=no ])
+       ])
+
+    if test x"$samba_cv_SYSCONF$1" = x"yes" ; then
+       AC_DEFINE(SYSCONF$1, 1, [Whether sysconf($1) is available])
     fi
-  done
-  IFS="$ac_save_ifs"
-  ;;
-esac],
-enable_fast_install=AC_ENABLE_FAST_INSTALL_DEFAULT)dnl
 ])
 
-# AC_ENABLE_FAST_INSTALL - set the default to --disable-fast-install
-AC_DEFUN(AC_DISABLE_FAST_INSTALL, [AC_BEFORE([$0],[AC_LIBTOOL_SETUP])dnl
-AC_ENABLE_FAST_INSTALL(no)])
-
-# AC_PROG_LD - find the path to the GNU or non-GNU linker
-AC_DEFUN(AC_PROG_LD,
-[AC_ARG_WITH(gnu-ld,
-[  --with-gnu-ld           assume the C compiler uses GNU ld [default=no]],
-test "$withval" = no || with_gnu_ld=yes, with_gnu_ld=no)
-AC_REQUIRE([AC_PROG_CC])dnl
-AC_REQUIRE([AC_CANONICAL_HOST])dnl
-AC_REQUIRE([AC_CANONICAL_BUILD])dnl
-ac_prog=ld
-if test "$ac_cv_prog_gcc" = yes; then
-  # Check if gcc -print-prog-name=ld gives a path.
-  AC_MSG_CHECKING([for ld used by GCC])
-  ac_prog=`($CC -print-prog-name=ld) 2>&5`
-  case "$ac_prog" in
-    # Accept absolute paths.
-changequote(,)dnl
-    [\\/]* | [A-Za-z]:[\\/]*)
-      re_direlt='/[^/][^/]*/\.\./'
-changequote([,])dnl
-      # Canonicalize the path of ld
-      ac_prog=`echo $ac_prog| sed 's%\\\\%/%g'`
-      while echo $ac_prog | grep "$re_direlt" > /dev/null 2>&1; do
-       ac_prog=`echo $ac_prog| sed "s%$re_direlt%/%"`
-      done
-      test -z "$LD" && LD="$ac_prog"
-      ;;
-  "")
-    # If it fails, then pretend we aren't using GCC.
-    ac_prog=ld
-    ;;
-  *)
-    # If it is relative, then search for the first ld in PATH.
-    with_gnu_ld=unknown
-    ;;
-  esac
-elif test "$with_gnu_ld" = yes; then
-  AC_MSG_CHECKING([for GNU ld])
-else
-  AC_MSG_CHECKING([for non-GNU ld])
-fi
-AC_CACHE_VAL(ac_cv_path_LD,
-[if test -z "$LD"; then
-  IFS="${IFS=  }"; ac_save_ifs="$IFS"; IFS="${IFS}${PATH_SEPARATOR-:}"
-  for ac_dir in $PATH; do
-    test -z "$ac_dir" && ac_dir=.
-    if test -f "$ac_dir/$ac_prog" || test -f "$ac_dir/$ac_prog$ac_exeext"; then
-      ac_cv_path_LD="$ac_dir/$ac_prog"
-      # Check to see if the program is GNU ld.  I'd rather use --version,
-      # but apparently some GNU ld's only accept -v.
-      # Break only if it was the GNU/non-GNU ld that we prefer.
-      if "$ac_cv_path_LD" -v 2>&1 < /dev/null | egrep '(GNU|with BFD)' > /dev/null; then
-       test "$with_gnu_ld" != no && break
-      else
-       test "$with_gnu_ld" != yes && break
-      fi
-    fi
-  done
-  IFS="$ac_save_ifs"
-else
-  ac_cv_path_LD="$LD" # Let the user override the test with a path.
-fi])
-LD="$ac_cv_path_LD"
-if test -n "$LD"; then
-  AC_MSG_RESULT($LD)
-else
-  AC_MSG_RESULT(no)
-fi
-test -z "$LD" && AC_MSG_ERROR([no acceptable ld found in \$PATH])
-AC_PROG_LD_GNU
+dnl SMB_IS_LIBPTHREAD_LINKED([actions if true], [actions if false])
+dnl Test whether the current LIBS results in libpthread being present.
+dnl Execute the corresponding user action list.
+AC_DEFUN([SMB_IS_LIBPTHREAD_LINKED],
+[
+    AC_MSG_CHECKING(if libpthread is linked)
+    AC_TRY_LINK([],
+       [return pthread_create(0, 0, 0, 0);],
+       [
+           AC_MSG_RESULT(yes)
+           $1
+       ],
+       [
+           AC_MSG_RESULT(no)
+           $2
+       ])
 ])
 
-AC_DEFUN(AC_PROG_LD_GNU,
-[AC_CACHE_CHECK([if the linker ($LD) is GNU ld], ac_cv_prog_gnu_ld,
-[# I'd rather use --version here, but apparently some GNU ld's only accept -v.
-if $LD -v 2>&1 </dev/null | egrep '(GNU|with BFD)' 1>&5; then
-  ac_cv_prog_gnu_ld=yes
-else
-  ac_cv_prog_gnu_ld=no
-fi])
+dnl SMB_REMOVE_LIB(lib)
+dnl Remove the given library from $LIBS
+AC_DEFUN([SMB_REMOVE_LIB],
+[
+    LIBS=`echo $LIBS | sed '-es/-l$1//g'`
 ])
 
-# AC_PROG_NM - find the path to a BSD-compatible name lister
-AC_DEFUN(AC_PROG_NM,
-[AC_MSG_CHECKING([for BSD-compatible nm])
-AC_CACHE_VAL(ac_cv_path_NM,
-[if test -n "$NM"; then
-  # Let the user override the test.
-  ac_cv_path_NM="$NM"
-else
-  IFS="${IFS=  }"; ac_save_ifs="$IFS"; IFS="${IFS}${PATH_SEPARATOR-:}"
-  for ac_dir in $PATH /usr/ccs/bin /usr/ucb /bin; do
-    test -z "$ac_dir" && ac_dir=.
-    if test -f $ac_dir/nm || test -f $ac_dir/nm$ac_exeext ; then
-      # Check to see if the nm accepts a BSD-compat flag.
-      # Adding the `sed 1q' prevents false positives on HP-UX, which says:
-      #   nm: unknown option "B" ignored
-      if ($ac_dir/nm -B /dev/null 2>&1 | sed '1q'; exit 0) | egrep /dev/null >/dev/null; then
-       ac_cv_path_NM="$ac_dir/nm -B"
-       break
-      elif ($ac_dir/nm -p /dev/null 2>&1 | sed '1q'; exit 0) | egrep /dev/null >/dev/null; then
-       ac_cv_path_NM="$ac_dir/nm -p"
-       break
-      else
-       ac_cv_path_NM=${ac_cv_path_NM="$ac_dir/nm"} # keep the first match, but
-       continue # so that we can try to find one that supports BSD flags
-      fi
+dnl SMB_CHECK_DMAPI([actions if true], [actions if false])
+dnl Check whether DMAPI is available and is a version that we know
+dnl how to deal with. The default truth action is to set samba_dmapi_libs
+dnl to the list of necessary libraries, and to define USE_DMAPI.
+AC_DEFUN([SMB_CHECK_DMAPI],
+[
+    samba_dmapi_libs=""
+
+    if test x"$samba_dmapi_libs" = x"" ; then
+       AC_CHECK_LIB(dm, dm_get_eventlist,
+               [ samba_dmapi_libs="-ldm"], [])
+    fi
+
+    if test x"$samba_dmapi_libs" = x"" ; then
+       AC_CHECK_LIB(jfsdm, dm_get_eventlist,
+               [samba_dmapi_libs="-ljfsdm"], [])
+    fi
+
+    if test x"$samba_dmapi_libs" = x"" ; then
+       AC_CHECK_LIB(xdsm, dm_get_eventlist,
+               [samba_dmapi_libs="-lxdsm"], [])
+    fi
+
+    if test x"$samba_dmapi_libs" = x"" ; then
+        AC_CHECK_LIB(dmapi, dm_get_eventlist,
+                [samba_dmapi_libs="-ldmapi"], [])
+    fi
+
+
+    # Only bother to test ehaders if we have a candidate DMAPI library
+    if test x"$samba_dmapi_libs" != x"" ; then
+       AC_CHECK_HEADERS(sys/dmi.h xfs/dmapi.h sys/jfsdmapi.h sys/dmapi.h dmapi.h)
+    fi
+
+    if test x"$samba_dmapi_libs" != x"" ; then
+       samba_dmapi_save_LIBS="$LIBS"
+       LIBS="$LIBS $samba_dmapi_libs"
+       AC_TRY_LINK(
+               [
+#include <time.h>      /* needed by Tru64 */
+#include <sys/types.h> /* needed by AIX */
+#ifdef HAVE_XFS_DMAPI_H
+#include <xfs/dmapi.h>
+#elif defined(HAVE_SYS_DMI_H)
+#include <sys/dmi.h>
+#elif defined(HAVE_SYS_JFSDMAPI_H)
+#include <sys/jfsdmapi.h>
+#elif defined(HAVE_SYS_DMAPI_H)
+#include <sys/dmapi.h>
+#elif defined(HAVE_DMAPI_H)
+#include <dmapi.h>
+#endif
+               ],
+               [
+/* This link test is designed to fail on IRI 6.4, but should
+ * succeed on Linux, IRIX 6.5 and AIX.
+ */
+       char * version;
+       dm_eventset_t events;
+       /* This doesn't take an argument on IRIX 6.4. */
+       dm_init_service(&version);
+       /* IRIX 6.4 expects events to be a pointer. */
+       DMEV_ISSET(DM_EVENT_READ, events);
+               ],
+               [
+                   true # DMAPI link test succeeded
+               ],
+               [
+                   # DMAPI link failure
+                   samba_dmapi_libs=
+               ])
+       LIBS="$samba_dmapi_save_LIBS"
+    fi
+
+    if test x"$samba_dmapi_libs" = x"" ; then
+       # DMAPI detection failure actions begin
+       ifelse($2, [],
+           [
+               AC_ERROR(Failed to detect a supported DMAPI implementation)
+           ],
+           [
+               $2
+           ])
+       # DMAPI detection failure actions end
+    else
+       # DMAPI detection success actions start
+       ifelse($1, [],
+           [
+               AC_DEFINE(USE_DMAPI, 1,
+                   [Whether we should build DMAPI integration components])
+               AC_MSG_NOTICE(Found DMAPI support in $samba_dmapi_libs)
+           ],
+           [
+               $1
+           ])
+       # DMAPI detection success actions end
     fi
-  done
-  IFS="$ac_save_ifs"
-  test -z "$ac_cv_path_NM" && ac_cv_path_NM=nm
-fi])
-NM="$ac_cv_path_NM"
-AC_MSG_RESULT([$NM])
-])
 
-# AC_CHECK_LIBM - check for math library
-AC_DEFUN(AC_CHECK_LIBM,
-[AC_REQUIRE([AC_CANONICAL_HOST])dnl
-LIBM=
-case "$lt_target" in
-*-*-beos* | *-*-cygwin*)
-  # These system don't have libm
-  ;;
-*-ncr-sysv4.3*)
-  AC_CHECK_LIB(mw, _mwvalidcheckl, LIBM="-lmw")
-  AC_CHECK_LIB(m, main, LIBM="$LIBM -lm")
-  ;;
-*)
-  AC_CHECK_LIB(m, main, LIBM="-lm")
-  ;;
-esac
 ])
 
-# AC_LIBLTDL_CONVENIENCE[(dir)] - sets LIBLTDL to the link flags for
-# the libltdl convenience library, adds --enable-ltdl-convenience to
-# the configure arguments.  Note that LIBLTDL is not AC_SUBSTed, nor
-# is AC_CONFIG_SUBDIRS called.  If DIR is not provided, it is assumed
-# to be `${top_builddir}/libltdl'.  Make sure you start DIR with
-# '${top_builddir}/' (note the single quotes!) if your package is not
-# flat, and, if you're not using automake, define top_builddir as
-# appropriate in the Makefiles.
-AC_DEFUN(AC_LIBLTDL_CONVENIENCE, [AC_BEFORE([$0],[AC_LIBTOOL_SETUP])dnl
-  case "$enable_ltdl_convenience" in
-  no) AC_MSG_ERROR([this package needs a convenience libltdl]) ;;
-  "") enable_ltdl_convenience=yes
-      ac_configure_args="$ac_configure_args --enable-ltdl-convenience" ;;
-  esac
-  LIBLTDL=ifelse($#,1,$1,['${top_builddir}/libltdl'])/libltdlc.la
-  INCLTDL=ifelse($#,1,-I$1,['-I${top_builddir}/libltdl'])
+dnl SMB_CHECK_CLOCK_ID(clockid)
+dnl Test whether the specified clock_gettime clock ID is available. If it
+dnl is, we define HAVE_clockid
+AC_DEFUN([SMB_CHECK_CLOCK_ID],
+[
+    AC_MSG_CHECKING(for $1)
+    AC_TRY_LINK([
+#if TIME_WITH_SYS_TIME
+# include <sys/time.h>
+# include <time.h>
+#else
+# if HAVE_SYS_TIME_H
+#  include <sys/time.h>
+# else
+#  include <time.h>
+# endif
+#endif
+    ],
+    [
+clockid_t clk = $1;
+    ],
+    [
+       AC_MSG_RESULT(yes)
+       AC_DEFINE(HAVE_$1, 1,
+           [Whether the clock_gettime clock ID $1 is available])
+    ],
+    [
+       AC_MSG_RESULT(no)
+    ])
 ])
 
-# AC_LIBLTDL_INSTALLABLE[(dir)] - sets LIBLTDL to the link flags for
-# the libltdl installable library, and adds --enable-ltdl-install to
-# the configure arguments.  Note that LIBLTDL is not AC_SUBSTed, nor
-# is AC_CONFIG_SUBDIRS called.  If DIR is not provided, it is assumed
-# to be `${top_builddir}/libltdl'.  Make sure you start DIR with
-# '${top_builddir}/' (note the single quotes!) if your package is not
-# flat, and, if you're not using automake, define top_builddir as
-# appropriate in the Makefiles.
-# In the future, this macro may have to be called after AC_PROG_LIBTOOL.
-AC_DEFUN(AC_LIBLTDL_INSTALLABLE, [AC_BEFORE([$0],[AC_LIBTOOL_SETUP])dnl
-  AC_CHECK_LIB(ltdl, main,
-  [test x"$enable_ltdl_install" != xyes && enable_ltdl_install=no],
-  [if test x"$enable_ltdl_install" = xno; then
-     AC_MSG_WARN([libltdl not installed, but installation disabled])
-   else
-     enable_ltdl_install=yes
-   fi
-  ])
-  if test x"$enable_ltdl_install" = x"yes"; then
-    ac_configure_args="$ac_configure_args --enable-ltdl-install"
-    LIBLTDL=ifelse($#,1,$1,['${top_builddir}/libltdl'])/libltdl.la
-    INCLTDL=ifelse($#,1,-I$1,['-I${top_builddir}/libltdl'])
-  else
-    ac_configure_args="$ac_configure_args --enable-ltdl-install=no"
-    LIBLTDL="-lltdl"
-    INCLTDL=
-  fi
+dnl SMB_IF_RTSIGNAL_BUG([actions if true],
+dnl                    [actions if false],
+dnl                    [actions if cross compiling])
+dnl Test whether we can call sigaction with RT_SIGNAL_NOTIFY and
+dnl RT_SIGNAL_LEASE (also RT_SIGNAL_AIO for good measure, though
+dnl I don't believe that triggers any bug.
+dnl
+dnl See the samba-technical thread titled "Failed to setup
+dnl RT_SIGNAL_NOTIFY handler" for details on the bug in question.
+AC_DEFUN([SMB_IF_RTSIGNAL_BUG],
+[
+    rt_signal_notify_works=yes
+    rt_signal_lease_works=yes
+    rt_signal_aio_works=yes
+
+    AC_MSG_CHECKING(if sigaction works with realtime signals)
+    AC_TRY_RUN(
+       [
+#include <sys/types.h>
+#include <fcntl.h>
+#include <signal.h>
+
+/* from smbd/notify_kernel.c */
+#ifndef RT_SIGNAL_NOTIFY
+#define RT_SIGNAL_NOTIFY (SIGRTMIN+2)
+#endif
+
+/* from smbd/aio.c */
+#ifndef RT_SIGNAL_AIO
+#define RT_SIGNAL_AIO (SIGRTMIN+3)
+#endif
+
+/* from smbd/oplock_linux.c */
+#ifndef RT_SIGNAL_LEASE
+#define RT_SIGNAL_LEASE (SIGRTMIN+1)
+#endif
+
+static void signal_handler(int sig, siginfo_t *info, void *unused)
+{
+    int do_nothing = 0;
+}
+
+int main(void)
+{
+    int result = 0;
+    struct sigaction act = {0};
+
+    act.sa_sigaction = signal_handler;
+    act.sa_flags = SA_SIGINFO;
+    sigemptyset( &act.sa_mask );
+
+    if (sigaction(RT_SIGNAL_LEASE, &act, 0) != 0) {
+           /* Failed to setup RT_SIGNAL_LEASE handler */
+           result += 1;
+    }
+
+    if (sigaction(RT_SIGNAL_NOTIFY, &act, 0) != 0) {
+           /* Failed to setup RT_SIGNAL_NOTIFY handler */
+           result += 10;
+    }
+
+    if (sigaction(RT_SIGNAL_AIO, &act, 0) != 0) {
+           /* Failed to setup RT_SIGNAL_AIO handler */
+           result += 100;
+    }
+
+    /* zero on success */
+    return result;
+}
+       ],
+       [
+           AC_MSG_RESULT(yes)
+           $2
+       ],
+       [
+           AC_MSG_RESULT(no)
+           case "$ac_status" in
+               1|11|101|111)  rt_signal_lease_ok=no ;;
+           esac
+           case "$ac_status" in
+               10|11|110|111)  rt_signal_notify_ok=no ;;
+           esac
+           case "$ac_status" in
+               100|110|101|111)  rt_signal_aio_ok=no ;;
+           esac
+           $2
+       ],
+       [
+           AC_MSG_RESULT(cross)
+           $3
+       ])
 ])
 
-dnl old names
-AC_DEFUN(AM_PROG_LIBTOOL, [indir([AC_PROG_LIBTOOL])])dnl
-AC_DEFUN(AM_ENABLE_SHARED, [indir([AC_ENABLE_SHARED], $@)])dnl
-AC_DEFUN(AM_ENABLE_STATIC, [indir([AC_ENABLE_STATIC], $@)])dnl
-AC_DEFUN(AM_DISABLE_SHARED, [indir([AC_DISABLE_SHARED], $@)])dnl
-AC_DEFUN(AM_DISABLE_STATIC, [indir([AC_DISABLE_STATIC], $@)])dnl
-AC_DEFUN(AM_PROG_LD, [indir([AC_PROG_LD])])dnl
-AC_DEFUN(AM_PROG_NM, [indir([AC_PROG_NM])])dnl
-
-dnl This is just to silence aclocal about the macro not being used
-ifelse([AC_DISABLE_FAST_INSTALL])dnl
+m4_include(lib/replace/libreplace.m4)