]> git.sur5r.net Git - openldap/blobdiff - build/openldap.m4
ITS#7182 Enable operation and connection monitoring.
[openldap] / build / openldap.m4
index d37f062563faf341bfad81cc860ab37b15149e00..2f72bb2ff5fb3dff30be339694c5c228c6c5ff52 100644 (file)
@@ -1,25 +1,29 @@
+dnl OpenLDAP Autoconf Macros
 dnl $OpenLDAP$
 dnl $OpenLDAP$
+dnl This work is part of OpenLDAP Software <http://www.openldap.org/>.
 dnl
 dnl
-dnl Copyright 1998-2002 The OpenLDAP Foundation, Redwood City, California, USA
+dnl Copyright 1998-2012 The OpenLDAP Foundation.
 dnl All rights reserved.
 dnl All rights reserved.
-dnl 
+dnl
 dnl Redistribution and use in source and binary forms, with or without
 dnl modification, are permitted only as authorized by the OpenLDAP
 dnl Redistribution and use in source and binary forms, with or without
 dnl modification, are permitted only as authorized by the OpenLDAP
-dnl Public License.  A copy of this license is available at
-dnl http://www.OpenLDAP.org/license.html or in file LICENSE in the
-dnl top-level directory of the distribution.
+dnl Public License.
 dnl
 dnl
-dnl OpenLDAP Autoconf Macros
+dnl A copy of this license is available in the file LICENSE in the
+dnl top-level directory of the distribution or, alternatively, at
+dnl <http://www.OpenLDAP.org/license.html>.
 dnl
 dnl --------------------------------------------------------------------
 dnl Restricted form of AC_ARG_ENABLE that limits user options
 dnl
 dnl $1 = option name
 dnl $2 = help-string
 dnl
 dnl --------------------------------------------------------------------
 dnl Restricted form of AC_ARG_ENABLE that limits user options
 dnl
 dnl $1 = option name
 dnl $2 = help-string
-dnl $3 = default value (auto)
+dnl $3 = default value (auto).  "--" means do not set it by default
 dnl $4 = allowed values (auto yes no)
 dnl $4 = allowed values (auto yes no)
+dnl $5 = overridden default
 AC_DEFUN([OL_ARG_ENABLE], [# OpenLDAP --enable-$1
 AC_DEFUN([OL_ARG_ENABLE], [# OpenLDAP --enable-$1
-       AC_ARG_ENABLE($1,changequote(<,>)<$2 [>ifelse($3,,auto,$3)<]>changequote([,]),[
+       pushdef([ol_DefVal],ifelse($3,,auto,$3))
+       AC_ARG_ENABLE($1,ifelse($4,,[$2],[$2] translit([$4],[ ],[|])) ifelse($3,--,,@<:@ol_DefVal@:>@),[
        ol_arg=invalid
        for ol_val in ifelse($4,,[auto yes no],[$4]) ; do
                if test "$enableval" = "$ol_val" ; then
        ol_arg=invalid
        for ol_val in ifelse($4,,[auto yes no],[$4]) ; do
                if test "$enableval" = "$ol_val" ; then
@@ -30,9 +34,10 @@ AC_DEFUN([OL_ARG_ENABLE], [# OpenLDAP --enable-$1
                AC_MSG_ERROR(bad value $enableval for --enable-$1)
        fi
        ol_enable_$1="$ol_arg"
                AC_MSG_ERROR(bad value $enableval for --enable-$1)
        fi
        ol_enable_$1="$ol_arg"
-],
-[      ol_enable_$1=ifelse($3,,"auto","$3")])dnl
-dnl AC_VERBOSE(OpenLDAP -enable-$1 $ol_enable_$1)
+]ifelse($3,--,,[,
+[      ol_enable_$1=ifelse($5,,ol_DefVal,[${]$5[:-]ol_DefVal[}])]]))dnl
+dnl AC_MSG_RESULT([OpenLDAP -enable-$1 $ol_enable_$1])
+       popdef([ol_DefVal])
 # end --enable-$1
 ])dnl
 dnl
 # end --enable-$1
 ])dnl
 dnl
@@ -44,7 +49,7 @@ dnl $2 = help-string
 dnl $3 = default value (no)
 dnl $4 = allowed values (yes or no)
 AC_DEFUN([OL_ARG_WITH], [# OpenLDAP --with-$1
 dnl $3 = default value (no)
 dnl $4 = allowed values (yes or no)
 AC_DEFUN([OL_ARG_WITH], [# OpenLDAP --with-$1
-       AC_ARG_WITH($1,changequote(<,>)<$2 [>ifelse($3,,yes,$3)<]>changequote([,]),[
+       AC_ARG_WITH($1,[$2 @<:@]ifelse($3,,yes,$3)@:>@,[
        ol_arg=invalid
        for ol_val in ifelse($4,,[yes no],[$4]) ; do
                if test "$withval" = "$ol_val" ; then
        ol_arg=invalid
        for ol_val in ifelse($4,,[yes no],[$4]) ; do
                if test "$withval" = "$ol_val" ; then
@@ -57,62 +62,9 @@ AC_DEFUN([OL_ARG_WITH], [# OpenLDAP --with-$1
        ol_with_$1="$ol_arg"
 ],
 [      ol_with_$1=ifelse($3,,"no","$3")])dnl
        ol_with_$1="$ol_arg"
 ],
 [      ol_with_$1=ifelse($3,,"no","$3")])dnl
-dnl AC_VERBOSE(OpenLDAP --with-$1 $ol_with_$1)
+dnl AC_MSG_RESULT([OpenLDAP --with-$1 $ol_with_$1])
 # end --with-$1
 ])dnl
 # end --with-$1
 ])dnl
-dnl
-dnl ====================================================================
-dnl
-AC_DEFUN(AC_COMPILE_CHECK_SIZEOF,
-[changequote(<<, >>)dnl 
-dnl The name to #define. 
-define(<<AC_TYPE_NAME>>, translit(sizeof_$1, [a-z *], [A-Z_P]))dnl 
-dnl The cache variable name. 
-define(<<AC_CV_NAME>>, translit(ac_cv_sizeof_$1, [ *], [_p]))dnl 
-changequote([, ])dnl 
-AC_MSG_CHECKING(size of $1) 
-AC_CACHE_VAL(AC_CV_NAME, 
-[for ac_size in 4 8 1 2 16 $2 ; do # List sizes in rough order of prevalence. 
-  AC_TRY_COMPILE([#include "confdefs.h" 
-#include <sys/types.h> 
-$2 
-], [switch (0) case 0: case (sizeof ($1) == $ac_size):;], AC_CV_NAME=$ac_size) 
-  if test x$AC_CV_NAME != x ; then break; fi 
-done 
-]) 
-if test x$AC_CV_NAME = x ; then 
-  AC_MSG_ERROR([cannot determine a size for $1]) 
-fi 
-AC_MSG_RESULT($AC_CV_NAME) 
-AC_DEFINE_UNQUOTED(AC_TYPE_NAME, $AC_CV_NAME, [The number of bytes in type $1]) 
-undefine([AC_TYPE_NAME])dnl 
-undefine([AC_CV_NAME])dnl 
-])
-dnl ====================================================================
-dnl check if hard links are supported.
-dnl
-AC_DEFUN([OL_PROG_LN_H], [# test for ln hardlink support
-AC_MSG_CHECKING(whether ln works)
-AC_CACHE_VAL(ol_cv_prog_LN_H,
-[rm -f conftest.src conftest.dst
-echo "conftest" > conftest.src
-if ln conftest.src conftest.dst 2>/dev/null
-then
-  ol_cv_prog_LN_H="ln"
-else
-  ol_cv_prog_LN_H="cp"
-fi
-rm -f conftest.src conftest.dst
-])dnl
-LN_H="$ol_cv_prog_LN_H"
-if test "$ol_cv_prog_LN_H" = "ln"; then
-       AC_MSG_RESULT(yes)
-else
-       AC_MSG_RESULT(no)
-fi
-AC_SUBST(LN_H)dnl
-])dnl
-dnl
 dnl ====================================================================
 dnl Check for dependency generation flag
 AC_DEFUN([OL_MKDEPEND], [# test for make depend flag
 dnl ====================================================================
 dnl Check for dependency generation flag
 AC_DEFUN([OL_MKDEPEND], [# test for make depend flag
@@ -128,7 +80,7 @@ if test -z "${MKDEP}"; then
  noCode;
 EOF
                                if AC_TRY_COMMAND($OL_MKDEP $flag conftest.c) \
  noCode;
 EOF
                                if AC_TRY_COMMAND($OL_MKDEP $flag conftest.c) \
-                                       | egrep '^conftest\.'"${ac_objext}" >/dev/null 2>&1
+                                       | grep '^conftest\.'"${ac_objext}" >/dev/null 2>&1
                                then
                                        if test ! -f conftest."${ac_object}" ; then
                                                ol_cv_mkdep=$flag
                                then
                                        if test ! -f conftest."${ac_object}" ; then
                                                ol_cv_mkdep=$flag
@@ -139,6 +91,7 @@ EOF
                        done
                        rm -f conftest*
                ])
                        done
                        rm -f conftest*
                ])
+               test "$ol_cv_mkdep" = no && OL_MKDEP=":"
        else
                cc_cv_mkdep=yes
                OL_MKDEP_FLAGS="${MKDEP_FLAGS}"
        else
                cc_cv_mkdep=yes
                OL_MKDEP_FLAGS="${MKDEP_FLAGS}"
@@ -156,28 +109,37 @@ dnl ====================================================================
 dnl Check if system uses EBCDIC instead of ASCII
 AC_DEFUN([OL_CPP_EBCDIC], [# test for EBCDIC
 AC_CACHE_CHECK([for EBCDIC],ol_cv_cpp_ebcdic,[
 dnl Check if system uses EBCDIC instead of ASCII
 AC_DEFUN([OL_CPP_EBCDIC], [# test for EBCDIC
 AC_CACHE_CHECK([for EBCDIC],ol_cv_cpp_ebcdic,[
-       AC_TRY_CPP([
+       AC_PREPROC_IFELSE([AC_LANG_SOURCE([[
 #if !('M' == 0xd4)
 #include <__ASCII__/generate_error.h>
 #endif
 #if !('M' == 0xd4)
 #include <__ASCII__/generate_error.h>
 #endif
-],
-       [ol_cv_cpp_ebcdic=yes],
-       [ol_cv_cpp_ebcdic=no])])
+]])],[ol_cv_cpp_ebcdic=yes],[ol_cv_cpp_ebcdic=no])])
 if test $ol_cv_cpp_ebcdic = yes ; then
        AC_DEFINE(HAVE_EBCDIC,1, [define if system uses EBCDIC instead of ASCII])
 fi
 ])
 dnl
 if test $ol_cv_cpp_ebcdic = yes ; then
        AC_DEFINE(HAVE_EBCDIC,1, [define if system uses EBCDIC instead of ASCII])
 fi
 ])
 dnl
+dnl --------------------------------------------------------------------
+dnl Check for MSVC
+AC_DEFUN([OL_MSVC],
+[AC_REQUIRE_CPP()dnl
+AC_CACHE_CHECK([whether we are using MS Visual C++], ol_cv_msvc,
+[AC_PREPROC_IFELSE([AC_LANG_SOURCE([[
+#ifndef _MSC_VER
+#include <__FOO__/generate_error.h>
+#endif
+]])],[ol_cv_msvc=yes],[ol_cv_msvc=no])])])
+
 dnl --------------------------------------------------------------------
 dnl OpenLDAP version of STDC header check w/ EBCDIC support
 dnl --------------------------------------------------------------------
 dnl OpenLDAP version of STDC header check w/ EBCDIC support
-AC_DEFUN(OL_HEADER_STDC,
+AC_DEFUN([OL_HEADER_STDC],
 [AC_REQUIRE_CPP()dnl
 AC_REQUIRE([OL_CPP_EBCDIC])dnl
 AC_CACHE_CHECK([for ANSI C header files], ol_cv_header_stdc,
 [AC_REQUIRE_CPP()dnl
 AC_REQUIRE([OL_CPP_EBCDIC])dnl
 AC_CACHE_CHECK([for ANSI C header files], ol_cv_header_stdc,
-[AC_TRY_CPP([#include <stdlib.h>
+[AC_PREPROC_IFELSE([AC_LANG_SOURCE([[#include <stdlib.h>
 #include <stdarg.h>
 #include <string.h>
 #include <stdarg.h>
 #include <string.h>
-#include <float.h>], ol_cv_header_stdc=yes, ol_cv_header_stdc=no)
+#include <float.h>]])],[ol_cv_header_stdc=yes],[ol_cv_header_stdc=no])
 
 if test $ol_cv_header_stdc = yes; then
   # SunOS 4.x string.h does not declare mem*, contrary to ANSI.
 
 if test $ol_cv_header_stdc = yes; then
   # SunOS 4.x string.h does not declare mem*, contrary to ANSI.
@@ -191,7 +153,7 @@ fi
 
 if test $ol_cv_header_stdc = yes; then
   # /bin/cc in Irix-4.0.5 gets non-ANSI ctype macros unless using -ansi.
 
 if test $ol_cv_header_stdc = yes; then
   # /bin/cc in Irix-4.0.5 gets non-ANSI ctype macros unless using -ansi.
-AC_TRY_RUN([#include <ctype.h>
+AC_RUN_IFELSE([AC_LANG_SOURCE([[#include <ctype.h>
 #ifndef HAVE_EBCDIC
 #      define ISLOWER(c) ('a' <= (c) && (c) <= 'z')
 #      define TOUPPER(c) (ISLOWER(c) ? 'A' + ((c) - 'a') : (c))
 #ifndef HAVE_EBCDIC
 #      define ISLOWER(c) ('a' <= (c) && (c) <= 'z')
 #      define TOUPPER(c) (ISLOWER(c) ? 'A' + ((c) - 'a') : (c))
@@ -205,7 +167,7 @@ AC_TRY_RUN([#include <ctype.h>
 int main () { int i; for (i = 0; i < 256; i++)
 if (XOR (islower (i), ISLOWER (i)) || toupper (i) != TOUPPER (i)) exit(2);
 exit (0); }
 int main () { int i; for (i = 0; i < 256; i++)
 if (XOR (islower (i), ISLOWER (i)) || toupper (i) != TOUPPER (i)) exit(2);
 exit (0); }
-], , ol_cv_header_stdc=no, :)
+]])],[],[ol_cv_header_stdc=no],[:])
 fi])
 if test $ol_cv_header_stdc = yes; then
   AC_DEFINE(STDC_HEADERS)
 fi])
 if test $ol_cv_header_stdc = yes; then
   AC_DEFINE(STDC_HEADERS)
@@ -214,32 +176,98 @@ ac_cv_header_stdc=disable
 ])
 dnl
 dnl ====================================================================
 ])
 dnl
 dnl ====================================================================
-dnl Check if struct passwd has pw_gecos
-AC_DEFUN([OL_STRUCT_PASSWD_PW_GECOS], [# test for pw_gecos in struct passwd
-AC_CACHE_CHECK([struct passwd for pw_gecos],ol_cv_struct_passwd_pw_gecos,[
-       AC_TRY_COMPILE([#include <pwd.h>],[
-       struct passwd pwd;
-       pwd.pw_gecos = pwd.pw_name;
-],
-       [ol_cv_struct_passwd_pw_gecos=yes],
-       [ol_cv_struct_passwd_pw_gecos=no])])
-if test $ol_cv_struct_passwd_pw_gecos = yes ; then
-       AC_DEFINE(HAVE_PW_GECOS,1, [define if struct passwd has pw_gecos])
+dnl DNS resolver macros
+AC_DEFUN([OL_RESOLVER_TRY],
+[if test $ol_cv_lib_resolver = no ; then
+       AC_CACHE_CHECK([for resolver link (]ifelse($2,,default,$2)[)],[$1],
+[
+       ol_RESOLVER_LIB=ifelse($2,,,$2)
+       ol_LIBS=$LIBS
+       LIBS="$ol_RESOLVER_LIB $LIBS"
+
+       AC_LINK_IFELSE([AC_LANG_PROGRAM([[
+#ifdef HAVE_SYS_TYPES_H
+#      include <sys/types.h>
+#endif
+#include <netinet/in.h>
+#ifdef HAVE_ARPA_NAMESER_H
+#      include <arpa/nameser.h>
+#endif
+#ifdef HAVE_RESOLV_H
+#      include <resolv.h>
+#endif
+]], [[{
+       int len, status;
+       char *request = NULL;
+       unsigned char reply[64*1024];
+       unsigned char host[64*1024];
+       unsigned char *p;
+
+#ifdef NS_HFIXEDSZ
+       /* Bind 8/9 interface */
+       len = res_query(request, ns_c_in, ns_t_srv, reply, sizeof(reply));
+#else
+       /* Bind 4 interface */
+# ifndef T_SRV
+#  define T_SRV 33
+# endif
+       len = res_query(request, C_IN, T_SRV, reply, sizeof(reply));
+#endif
+       p = reply;
+#ifdef NS_HFIXEDSZ
+       /* Bind 8/9 interface */
+       p += NS_HFIXEDSZ;
+#elif defined(HFIXEDSZ)
+       /* Bind 4 interface w/ HFIXEDSZ */
+       p += HFIXEDSZ;
+#else
+       /* Bind 4 interface w/o HFIXEDSZ */
+       p += sizeof(HEADER);
+#endif
+       status = dn_expand( reply, reply+len, p, host, sizeof(host));
+}]])],[$1=yes],[$1=no])
+
+       LIBS="$ol_LIBS"
+])
+
+       if test $$1 = yes ; then
+               ol_cv_lib_resolver=ifelse($2,,yes,$2)
+       fi
 fi
 ])
 fi
 ])
-dnl
 dnl --------------------------------------------------------------------
 dnl --------------------------------------------------------------------
-dnl Check if struct passwd has pw_passwd
-AC_DEFUN([OL_STRUCT_PASSWD_PW_PASSWD], [# test for pw_passwd in struct passwd
-AC_CACHE_CHECK([struct passwd for pw_passwd],ol_cv_struct_passwd_pw_passwd,[
-       AC_TRY_COMPILE([#include <pwd.h>],[
-       struct passwd pwd;
-       pwd.pw_passwd = pwd.pw_name;
-],
-       [ol_cv_struct_passwd_pw_passwd=yes],
-       [ol_cv_struct_passwd_pw_passwd=no])])
-if test $ol_cv_struct_passwd_pw_passwd = yes ; then
-       AC_DEFINE(HAVE_PW_PASSWD,1, [define if struct passwd has pw_passwd])
+dnl Try to locate appropriate library
+AC_DEFUN([OL_RESOLVER_LINK],
+[ol_cv_lib_resolver=no
+OL_RESOLVER_TRY(ol_cv_resolver_none)
+OL_RESOLVER_TRY(ol_cv_resolver_resolv,[-lresolv])
+OL_RESOLVER_TRY(ol_cv_resolver_bind,[-lbind])
+])
+dnl
+dnl ====================================================================
+dnl International Components for Unicode (ICU)
+AC_DEFUN([OL_ICU],
+[ol_icu=no
+AC_CHECK_HEADERS( unicode/utypes.h )
+if test $ac_cv_header_unicode_utypes_h = yes ; then
+       dnl OL_ICULIBS="-licui18n -licuuc -licudata"
+       OL_ICULIBS="-licuuc -licudata"
+
+       AC_CACHE_CHECK([for ICU libraries], [ol_cv_lib_icu], [
+               ol_LIBS="$LIBS"
+               LIBS="$OL_ICULIBS $LIBS"
+               AC_LINK_IFELSE([AC_LANG_PROGRAM([[
+#include <unicode/utypes.h>
+]], [[
+(void) u_errorName(0);
+]])],[ol_cv_lib_icu=yes],[ol_cv_lib_icu=no])
+               LIBS="$ol_LIBS"
+])
+
+       if test $ol_cv_lib_icu != no ; then
+               ol_icu="$OL_ICULIBS"
+               AC_DEFINE(HAVE_ICU,1,[define if you actually have ICU])
+       fi
 fi
 ])
 dnl
 fi
 ])
 dnl
@@ -254,9 +282,9 @@ AC_DEFUN([OL_BERKELEY_DB_TRY],
 [
        ol_DB_LIB=ifelse($2,,,$2)
        ol_LIBS=$LIBS
 [
        ol_DB_LIB=ifelse($2,,,$2)
        ol_LIBS=$LIBS
-       LIBS="$ol_DB_LIB $LIBS"
+       LIBS="$ol_DB_LIB $LTHREAD_LIBS $LIBS"
 
 
-       AC_TRY_LINK([
+       AC_LINK_IFELSE([AC_LANG_PROGRAM([[
 #ifdef HAVE_DB_185_H
 # include <db_185.h>
 #else
 #ifdef HAVE_DB_185_H
 # include <db_185.h>
 #else
@@ -270,25 +298,7 @@ AC_DEFUN([OL_BERKELEY_DB_TRY],
 #ifndef NULL
 #define NULL ((void*)0)
 #endif
 #ifndef NULL
 #define NULL ((void*)0)
 #endif
-],[
-#if DB_VERSION_MAJOR > 1
-       {
-               char *version;
-               int major, minor, patch;
-
-               version = db_version( &major, &minor, &patch );
-
-               if( major != DB_VERSION_MAJOR ||
-                       minor < DB_VERSION_MINOR )
-               {
-                       printf("Berkeley DB version mismatch\n"
-                               "\texpected: %s\n\tgot: %s\n",
-                               DB_VERSION_STRING, version);
-                       return 1;
-               }
-       }
-#endif
-
+]], [[
 #if DB_VERSION_MAJOR > 2
        db_env_create( NULL, 0 );
 #elif DB_VERSION_MAJOR > 1
 #if DB_VERSION_MAJOR > 2
        db_env_create( NULL, 0 );
 #elif DB_VERSION_MAJOR > 1
@@ -296,7 +306,7 @@ AC_DEFUN([OL_BERKELEY_DB_TRY],
 #else
        (void) dbopen( NULL, 0, 0, 0, NULL);
 #endif
 #else
        (void) dbopen( NULL, 0, 0, 0, NULL);
 #endif
-],[$1=yes],[$1=no])
+]])],[$1=yes],[$1=no])
 
        LIBS="$ol_LIBS"
 ])
 
        LIBS="$ol_LIBS"
 ])
@@ -308,31 +318,127 @@ fi
 ])
 dnl
 dnl --------------------------------------------------------------------
 ])
 dnl
 dnl --------------------------------------------------------------------
+dnl Get major and minor version from <db.h>
+AC_DEFUN([OL_BDB_HEADER_VERSION],
+[AC_CACHE_CHECK([for Berkeley DB major version in db.h], [ol_cv_bdb_major],[
+       AC_LANG_CONFTEST([
+#include <db.h>
+#ifndef DB_VERSION_MAJOR
+#      define DB_VERSION_MAJOR 1
+#endif
+__db_version DB_VERSION_MAJOR
+])
+       set X `eval "$ac_cpp conftest.$ac_ext" | $EGREP __db_version` none none
+       ol_cv_bdb_major=${3}
+])
+case $ol_cv_bdb_major in [[1-9]]*) : ;; *)
+       AC_MSG_ERROR([Unknown Berkeley DB major version in db.h]) ;;
+esac
+
+dnl Determine minor version
+AC_CACHE_CHECK([for Berkeley DB minor version in db.h], [ol_cv_bdb_minor],[
+       AC_LANG_CONFTEST([
+#include <db.h>
+#ifndef DB_VERSION_MINOR
+#      define DB_VERSION_MINOR 0
+#endif
+__db_version DB_VERSION_MINOR
+])
+       set X `eval "$ac_cpp conftest.$ac_ext" | $EGREP __db_version` none none
+       ol_cv_bdb_minor=${3}
+])
+case $ol_cv_bdb_minor in [[0-9]]*) : ;; *)
+       AC_MSG_ERROR([Unknown Berkeley DB minor version in db.h]) ;;
+esac
+])
+dnl
+dnl --------------------------------------------------------------------
 dnl Try to locate appropriate library
 AC_DEFUN([OL_BERKELEY_DB_LINK],
 [ol_cv_lib_db=no
 dnl Try to locate appropriate library
 AC_DEFUN([OL_BERKELEY_DB_LINK],
 [ol_cv_lib_db=no
-OL_BERKELEY_DB_TRY(ol_cv_db_none)
-OL_BERKELEY_DB_TRY(ol_cv_db_db4,[-ldb4])
-OL_BERKELEY_DB_TRY(ol_cv_db_db_4,[-ldb-4])
+
+if test $ol_cv_bdb_major = 5 ; then
+       OL_BERKELEY_DB_TRY(ol_cv_db_db_5_dot_m,[-ldb-5.$ol_cv_bdb_minor])
+       OL_BERKELEY_DB_TRY(ol_cv_db_db5m,[-ldb5$ol_cv_bdb_minor])
+       OL_BERKELEY_DB_TRY(ol_cv_db_db_5m,[-ldb-5$ol_cv_bdb_minor])
+       OL_BERKELEY_DB_TRY(ol_cv_db_db_5_m,[-ldb-5-$ol_cv_bdb_minor])
+       OL_BERKELEY_DB_TRY(ol_cv_db_db_5,[-ldb-5])
+       OL_BERKELEY_DB_TRY(ol_cv_db_db5,[-ldb5])
+elif test $ol_cv_bdb_major = 4 ; then
+       OL_BERKELEY_DB_TRY(ol_cv_db_db_4_dot_m,[-ldb-4.$ol_cv_bdb_minor])
+       OL_BERKELEY_DB_TRY(ol_cv_db_db4m,[-ldb4$ol_cv_bdb_minor])
+       OL_BERKELEY_DB_TRY(ol_cv_db_db_4m,[-ldb-4$ol_cv_bdb_minor])
+       OL_BERKELEY_DB_TRY(ol_cv_db_db_4_m,[-ldb-4-$ol_cv_bdb_minor])
+       OL_BERKELEY_DB_TRY(ol_cv_db_db_4,[-ldb-4])
+       OL_BERKELEY_DB_TRY(ol_cv_db_db4,[-ldb4])
+fi
 OL_BERKELEY_DB_TRY(ol_cv_db_db,[-ldb])
 OL_BERKELEY_DB_TRY(ol_cv_db_db,[-ldb])
-OL_BERKELEY_DB_TRY(ol_cv_db_db3,[-ldb3])
-OL_BERKELEY_DB_TRY(ol_cv_db_db_3,[-ldb-3])
-OL_BERKELEY_DB_TRY(ol_cv_db_db2,[-ldb2])
-OL_BERKELEY_DB_TRY(ol_cv_db_db_2,[-ldb-2])
-OL_BERKELEY_DB_TRY(ol_cv_db_db1,[-ldb1])
-OL_BERKELEY_DB_TRY(ol_cv_db_db_1,[-ldb-1])
+OL_BERKELEY_DB_TRY(ol_cv_db_none)
+])
+dnl
+dnl --------------------------------------------------------------------
+dnl Check if Berkeley DB version
+AC_DEFUN([OL_BERKELEY_DB_VERSION],
+[AC_CACHE_CHECK([for Berkeley DB library and header version match], [ol_cv_berkeley_db_version], [
+       ol_LIBS="$LIBS"
+       LIBS="$LTHREAD_LIBS $LIBS"
+       if test $ol_cv_lib_db != yes ; then
+               LIBS="$ol_cv_lib_db $LIBS"
+       fi
+
+       AC_RUN_IFELSE([AC_LANG_SOURCE([[
+#ifdef HAVE_DB_185_H
+       choke me;
+#else
+#include <db.h>
+#endif
+#ifndef DB_VERSION_MAJOR
+# define DB_VERSION_MAJOR 1
+#endif
+#ifndef NULL
+#define NULL ((void *)0)
+#endif
+main()
+{
+#if DB_VERSION_MAJOR > 1
+       char *version;
+       int major, minor, patch;
+
+       version = db_version( &major, &minor, &patch );
+
+       if( major != DB_VERSION_MAJOR ||
+               minor != DB_VERSION_MINOR ||
+               patch != DB_VERSION_PATCH )
+       {
+               printf("Berkeley DB version mismatch\n"
+                       "\theader: %s\n\tlibrary: %s\n",
+                       DB_VERSION_STRING, version);
+               return 1;
+       }
+#endif
+
+       return 0;
+}]])],[ol_cv_berkeley_db_version=yes],[ol_cv_berkeley_db_version=no],[ol_cv_berkeley_db_version=cross])
+
+       LIBS="$ol_LIBS"
 ])
 ])
+
+       if test $ol_cv_berkeley_db_version = no ; then
+               AC_MSG_ERROR([Berkeley DB version mismatch])
+       fi
+])dnl
 dnl
 dnl --------------------------------------------------------------------
 dnl Check if Berkeley DB supports DB_THREAD
 AC_DEFUN([OL_BERKELEY_DB_THREAD],
 [AC_CACHE_CHECK([for Berkeley DB thread support], [ol_cv_berkeley_db_thread], [
        ol_LIBS="$LIBS"
 dnl
 dnl --------------------------------------------------------------------
 dnl Check if Berkeley DB supports DB_THREAD
 AC_DEFUN([OL_BERKELEY_DB_THREAD],
 [AC_CACHE_CHECK([for Berkeley DB thread support], [ol_cv_berkeley_db_thread], [
        ol_LIBS="$LIBS"
+       LIBS="$LTHREAD_LIBS $LIBS"
        if test $ol_cv_lib_db != yes ; then
        if test $ol_cv_lib_db != yes ; then
-               LIBS="$ol_cv_lib_db"
+               LIBS="$ol_cv_lib_db $LIBS"
        fi
 
        fi
 
-       AC_TRY_RUN([
+       AC_RUN_IFELSE([AC_LANG_SOURCE([[
 #ifdef HAVE_DB_185_H
        choke me;
 #else
 #ifdef HAVE_DB_185_H
        choke me;
 #else
@@ -366,9 +472,9 @@ main()
        }
 
 #if (DB_VERSION_MAJOR > 3) || (DB_VERSION_MINOR >= 1)
        }
 
 #if (DB_VERSION_MAJOR > 3) || (DB_VERSION_MINOR >= 1)
-       rc = env->open( env, NULL, flags, 0 );
+       rc = (env->open)( env, NULL, flags, 0 );
 #else
 #else
-       rc = env->open( env, NULL, NULL, flags, 0 );
+       rc = (env->open)( env, NULL, NULL, flags, 0 );
 #endif
 
        if ( rc == 0 ) {
 #endif
 
        if ( rc == 0 ) {
@@ -395,10 +501,7 @@ main()
 #endif
 
        return rc;
 #endif
 
        return rc;
-}],
-       [ol_cv_berkeley_db_thread=yes],
-       [ol_cv_berkeley_db_thread=no],
-       [ol_cv_berkeley_db_thread=cross])
+}]])],[ol_cv_berkeley_db_thread=yes],[ol_cv_berkeley_db_thread=no],[ol_cv_berkeley_db_thread=cross])
 
        LIBS="$ol_LIBS"
 ])
 
        LIBS="$ol_LIBS"
 ])
@@ -415,9 +518,17 @@ AC_DEFUN([OL_BERKELEY_DB],
 [ol_cv_berkeley_db=no
 AC_CHECK_HEADERS(db.h)
 if test $ac_cv_header_db_h = yes; then
 [ol_cv_berkeley_db=no
 AC_CHECK_HEADERS(db.h)
 if test $ac_cv_header_db_h = yes; then
+       OL_BDB_HEADER_VERSION
+       OL_BDB_COMPAT
+
+       if test $ol_cv_bdb_compat != yes ; then
+               AC_MSG_ERROR([BerkeleyDB version incompatible with BDB/HDB backends])
+       fi
+
        OL_BERKELEY_DB_LINK
        if test "$ol_cv_lib_db" != no ; then
                ol_cv_berkeley_db=yes
        OL_BERKELEY_DB_LINK
        if test "$ol_cv_lib_db" != no ; then
                ol_cv_berkeley_db=yes
+               OL_BERKELEY_DB_VERSION
                OL_BERKELEY_DB_THREAD
        fi
 fi
                OL_BERKELEY_DB_THREAD
        fi
 fi
@@ -425,7 +536,7 @@ fi
 dnl --------------------------------------------------------------------
 dnl Check for version compatility with back-bdb
 AC_DEFUN([OL_BDB_COMPAT],
 dnl --------------------------------------------------------------------
 dnl Check for version compatility with back-bdb
 AC_DEFUN([OL_BDB_COMPAT],
-[AC_CACHE_CHECK([Berkeley DB version for BDB backend], [ol_cv_bdb_compat],[
+[AC_CACHE_CHECK([if Berkeley DB version supported by BDB/HDB backends], [ol_cv_bdb_compat],[
        AC_EGREP_CPP(__db_version_compat,[
 #include <db.h>
 
        AC_EGREP_CPP(__db_version_compat,[
 #include <db.h>
 
@@ -433,191 +544,19 @@ AC_DEFUN([OL_BDB_COMPAT],
 #ifndef DB_VERSION_MAJOR
 #      define DB_VERSION_MAJOR 1
 #endif
 #ifndef DB_VERSION_MAJOR
 #      define DB_VERSION_MAJOR 1
 #endif
+#ifndef DB_VERSION_MINOR
+#      define DB_VERSION_MINOR 0
+#endif
+
+#define DB_VERSION_MM  ((DB_VERSION_MAJOR<<8)|DB_VERSION_MINOR)
 
 
-/* require 4.0 or later */
-#if DB_VERSION_MAJOR >= 4 
+/* require 4.4 or later */
+#if DB_VERSION_MM >= 0x0404
        __db_version_compat
 #endif
        ], [ol_cv_bdb_compat=yes], [ol_cv_bdb_compat=no])])
 ])
 
        __db_version_compat
 #endif
        ], [ol_cv_bdb_compat=yes], [ol_cv_bdb_compat=no])])
 ])
 
-dnl --------------------------------------------------------------------
-dnl Find old Berkeley DB 1.85/1.86
-AC_DEFUN([OL_BERKELEY_COMPAT_DB],
-[AC_CHECK_HEADERS(db_185.h db.h)
-if test $ac_cv_header_db_185_h = yes -o $ac_cv_header_db_h = yes; then
-       AC_CACHE_CHECK([if Berkeley DB header compatibility], [ol_cv_header_db1],[
-               AC_EGREP_CPP(__db_version_1,[
-#if HAVE_DB_185_H
-#      include <db_185.h>
-#else
-#      include <db.h>
-#endif
-
- /* this check could be improved */
-#ifndef DB_VERSION_MAJOR
-#      define DB_VERSION_MAJOR 1
-#endif
-
-#if DB_VERSION_MAJOR == 1 
-       __db_version_1
-#endif
-],     [ol_cv_header_db1=yes], [ol_cv_header_db1=no])])
-
-       if test $ol_cv_header_db1 = yes ; then
-               OL_BERKELEY_DB_LINK
-               if test "$ol_cv_lib_db" != no ; then
-                       ol_cv_berkeley_db=yes
-               fi
-       fi
-fi
-])
-dnl
-dnl ====================================================================
-dnl Check if GDBM library exists
-dnl Check for gdbm_open in standard libraries or -lgdbm
-dnl
-dnl defines ol_cv_lib_gdbm to 'yes' or '-lgdbm' or 'no'
-dnl            'yes' implies gdbm_open is in $LIBS
-dnl
-dnl uses:
-dnl            AC_CHECK_FUNC(gdbm_open)
-dnl            AC_CHECK_LIB(gdbm,gdbm_open)
-dnl
-AC_DEFUN([OL_LIB_GDBM],
-[AC_CACHE_CHECK(for GDBM library, [ol_cv_lib_gdbm],
-[      ol_LIBS="$LIBS"
-       AC_CHECK_FUNC(gdbm_open,[ol_cv_lib_gdbm=yes], [
-               AC_CHECK_LIB(gdbm,gdbm_open,[ol_cv_lib_gdbm=-lgdbm],[ol_cv_lib_gdbm=no])
-       ])
-       LIBS="$ol_LIBS"
-])
-])dnl
-dnl
-dnl --------------------------------------------------------------------
-dnl Check if GDBM exists
-dnl
-dnl defines ol_cv_gdbm to 'yes' or 'no'
-dnl 
-dnl uses:
-dnl            OL_LIB_GDBM
-dnl            AC_CHECK_HEADERS(gdbm.h)
-dnl
-AC_DEFUN([OL_GDBM],
-[AC_REQUIRE([OL_LIB_GDBM])
- AC_CHECK_HEADERS(gdbm.h)
- AC_CACHE_CHECK(for db, [ol_cv_gdbm], [
-       if test $ol_cv_lib_gdbm = no -o $ac_cv_header_gdbm_h = no ; then
-               ol_cv_gdbm=no
-       else
-               ol_cv_gdbm=yes
-       fi
-])
- if test $ol_cv_gdbm = yes ; then
-       AC_DEFINE(HAVE_GDBM,1, [define if GNU DBM is available])
- fi
-])dnl
-dnl
-dnl ====================================================================
-dnl Check if MDBM library exists
-dnl Check for mdbm_open in standard libraries or -lmdbm
-dnl
-dnl defines ol_cv_lib_mdbm to 'yes' or '-lmdbm' or 'no'
-dnl            'yes' implies mdbm_open is in $LIBS
-dnl
-dnl uses:
-dnl            AC_CHECK_FUNC(mdbm_set_chain)
-dnl            AC_CHECK_LIB(mdbm,mdbm_set_chain)
-dnl
-AC_DEFUN([OL_LIB_MDBM],
-[AC_CACHE_CHECK(for MDBM library, [ol_cv_lib_mdbm],
-[      ol_LIBS="$LIBS"
-       AC_CHECK_FUNC(mdbm_set_chain,[ol_cv_lib_mdbm=yes], [
-               AC_CHECK_LIB(mdbm,mdbm_set_chain,[ol_cv_lib_mdbm=-lmdbm],[ol_cv_lib_mdbm=no])
-       ])
-       LIBS="$ol_LIBS"
-])
-])dnl
-dnl
-dnl --------------------------------------------------------------------
-dnl Check if MDBM exists
-dnl
-dnl defines ol_cv_mdbm to 'yes' or 'no'
-dnl 
-dnl uses:
-dnl            OL_LIB_MDBM
-dnl            AC_CHECK_HEADERS(mdbm.h)
-dnl
-AC_DEFUN([OL_MDBM],
-[AC_REQUIRE([OL_LIB_MDBM])
- AC_CHECK_HEADERS(mdbm.h)
- AC_CACHE_CHECK(for db, [ol_cv_mdbm], [
-       if test $ol_cv_lib_mdbm = no -o $ac_cv_header_mdbm_h = no ; then
-               ol_cv_mdbm=no
-       else
-               ol_cv_mdbm=yes
-       fi
-])
- if test $ol_cv_mdbm = yes ; then
-       AC_DEFINE(HAVE_MDBM,1, [define if MDBM is available])
- fi
-])dnl
-dnl
-dnl ====================================================================
-dnl Check if NDBM library exists
-dnl Check for dbm_open in standard libraries or -lndbm or -ldbm
-dnl
-dnl defines ol_cv_lib_ndbm to 'yes' or '-lndbm' or -ldbm or 'no'
-dnl            'yes' implies ndbm_open is in $LIBS
-dnl
-dnl uses:
-dnl            AC_CHECK_FUNC(dbm_open)
-dnl            AC_CHECK_LIB(ndbm,dbm_open)
-dnl            AC_CHECK_LIB(dbm,dbm_open)
-dnl
-dnl restrictions:
-dnl            should also check SVR4 case: dbm_open() in -lucb but that
-dnl            would requiring dealing with -L/usr/ucblib
-dnl
-AC_DEFUN([OL_LIB_NDBM],
-[AC_CACHE_CHECK(for NDBM library, [ol_cv_lib_ndbm],
-[      ol_LIBS="$LIBS"
-       AC_CHECK_FUNC(dbm_open,[ol_cv_lib_ndbm=yes], [
-               AC_CHECK_LIB(ndbm,dbm_open,[ol_cv_lib_ndbm=-lndbm], [
-                       AC_CHECK_LIB(dbm,dbm_open,[ol_cv_lib_ndbm=-ldbm],
-                               [ol_cv_lib_ndbm=no])dnl
-               ])
-       ])
-       LIBS="$ol_LIBS"
-])
-])dnl
-dnl
-dnl --------------------------------------------------------------------
-dnl Check if NDBM exists
-dnl
-dnl defines ol_cv_ndbm to 'yes' or 'no'
-dnl 
-dnl uses:
-dnl            OL_LIB_NDBM
-dnl            AC_CHECK_HEADERS(ndbm.h)
-dnl
-dnl restrictions:
-dnl            Doesn't handle SVR4 case (see above)
-dnl
-AC_DEFUN([OL_NDBM],
-[AC_REQUIRE([OL_LIB_NDBM])
- AC_CHECK_HEADERS(ndbm.h)
- AC_CACHE_CHECK(for db, [ol_cv_ndbm], [
-       if test $ol_cv_lib_ndbm = no -o $ac_cv_header_ndbm_h = no ; then
-               ol_cv_ndbm=no
-       else
-               ol_cv_ndbm=yes
-       fi
-])
- if test $ol_cv_ndbm = yes ; then
-       AC_DEFINE(HAVE_NDBM,1, [define if NDBM is available])
- fi
-])dnl
 dnl
 dnl ====================================================================
 dnl Check POSIX Thread version 
 dnl
 dnl ====================================================================
 dnl Check POSIX Thread version 
@@ -643,11 +582,11 @@ dnl Draft 9 and 10 are equivalent for our purposes.
 dnl
 AC_DEFUN([OL_POSIX_THREAD_VERSION],
 [AC_CACHE_CHECK([POSIX thread version],[ol_cv_pthread_version],[
 dnl
 AC_DEFUN([OL_POSIX_THREAD_VERSION],
 [AC_CACHE_CHECK([POSIX thread version],[ol_cv_pthread_version],[
-       AC_TRY_COMPILE([
+       AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
 #              include <pthread.h>
 #              include <pthread.h>
-       ],[
+       ]], [[
                int i = PTHREAD_CREATE_JOINABLE;
                int i = PTHREAD_CREATE_JOINABLE;
-       ],[
+       ]])],[
        AC_EGREP_HEADER(pthread_detach,pthread.h,
        ol_cv_pthread_version=10, ol_cv_pthread_version=8)],[
        AC_EGREP_CPP(draft7,[
        AC_EGREP_HEADER(pthread_detach,pthread.h,
        ol_cv_pthread_version=10, ol_cv_pthread_version=8)],[
        AC_EGREP_CPP(draft7,[
@@ -668,8 +607,8 @@ AC_DEFUN([OL_POSIX_THREAD_VERSION],
 ])dnl
 dnl
 dnl --------------------------------------------------------------------
 ])dnl
 dnl
 dnl --------------------------------------------------------------------
-AC_DEFUN([OL_PTHREAD_TEST_INCLUDES],
-[/* pthread test headers */
+AC_DEFUN([OL_PTHREAD_TEST_INCLUDES], [[
+/* pthread test headers */
 #include <pthread.h>
 #if HAVE_PTHREADS < 7
 #include <errno.h>
 #include <pthread.h>
 #if HAVE_PTHREADS < 7
 #include <errno.h>
@@ -683,8 +622,8 @@ static void *task(p)
 {
        return (void *) (p == NULL);
 }
 {
        return (void *) (p == NULL);
 }
-])
-AC_DEFUN([OL_PTHREAD_TEST_FUNCTION],[
+]])
+AC_DEFUN([OL_PTHREAD_TEST_FUNCTION],[[
        /* pthread test function */
 #ifndef PTHREAD_CREATE_DETACHED
 #define        PTHREAD_CREATE_DETACHED 1
        /* pthread test function */
 #ifndef PTHREAD_CREATE_DETACHED
 #define        PTHREAD_CREATE_DETACHED 1
@@ -730,10 +669,10 @@ AC_DEFUN([OL_PTHREAD_TEST_FUNCTION],[
 #endif
 
        return 0;
 #endif
 
        return 0;
-])
+]])
 
 AC_DEFUN([OL_PTHREAD_TEST_PROGRAM],
 
 AC_DEFUN([OL_PTHREAD_TEST_PROGRAM],
-[OL_PTHREAD_TEST_INCLUDES
+AC_LANG_SOURCE([OL_PTHREAD_TEST_INCLUDES
 
 int main(argc, argv)
        int argc;
 
 int main(argc, argv)
        int argc;
@@ -741,7 +680,7 @@ int main(argc, argv)
 {
 OL_PTHREAD_TEST_FUNCTION
 }
 {
 OL_PTHREAD_TEST_FUNCTION
 }
-])
+]))
 dnl --------------------------------------------------------------------
 AC_DEFUN([OL_PTHREAD_TRY], [# Pthread try link: $1 ($2)
 if test "$ol_link_threads" = no ; then
 dnl --------------------------------------------------------------------
 AC_DEFUN([OL_PTHREAD_TRY], [# Pthread try link: $1 ($2)
 if test "$ol_link_threads" = no ; then
@@ -751,9 +690,11 @@ if test "$ol_link_threads" = no ; then
                ol_LIBS="$LIBS"
                LIBS="$1 $LIBS"
 
                ol_LIBS="$LIBS"
                LIBS="$1 $LIBS"
 
-               AC_TRY_RUN(OL_PTHREAD_TEST_PROGRAM,
-                       [$2=yes], [$2=no],
-                       [AC_TRY_LINK(OL_PTHREAD_TEST_INCLUDES,OL_PTHREAD_TEST_FUNCTION,
+               AC_RUN_IFELSE([OL_PTHREAD_TEST_PROGRAM],
+                       [$2=yes],
+                       [$2=no],
+                       [AC_LINK_IFELSE([AC_LANG_PROGRAM(OL_PTHREAD_TEST_INCLUDES,
+                               OL_PTHREAD_TEST_FUNCTION)],
                                [$2=yes], [$2=no])])
 
                # restore the LIBS
                                [$2=yes], [$2=no])])
 
                # restore the LIBS
@@ -837,11 +778,11 @@ AC_DEFUN([OL_LINUX_THREADS], [
        AC_REQUIRE([OL_HEADER_LINUX_THREADS])
        AC_REQUIRE([OL_SYS_LINUX_THREADS])
        AC_CACHE_CHECK([for LinuxThreads consistency], [ol_cv_linux_threads], [
        AC_REQUIRE([OL_HEADER_LINUX_THREADS])
        AC_REQUIRE([OL_SYS_LINUX_THREADS])
        AC_CACHE_CHECK([for LinuxThreads consistency], [ol_cv_linux_threads], [
-               if test $ol_cv_header_linux_threads = yes -a \
-                       $ol_cv_sys_linux_threads = yes; then
+               if test $ol_cv_header_linux_threads = yes &&
+                  test $ol_cv_sys_linux_threads = yes; then
                        ol_cv_linux_threads=yes
                        ol_cv_linux_threads=yes
-               elif test $ol_cv_header_linux_threads = no -a \
-                       $ol_cv_sys_linux_threads = no; then
+               elif test $ol_cv_header_linux_threads = no &&
+                    test $ol_cv_sys_linux_threads = no; then
                        ol_cv_linux_threads=no
                else
                        ol_cv_linux_threads=error
                        ol_cv_linux_threads=no
                else
                        ol_cv_linux_threads=error
@@ -853,7 +794,7 @@ dnl ====================================================================
 dnl Check for POSIX Regex
 AC_DEFUN([OL_POSIX_REGEX], [
 AC_CACHE_CHECK([for compatible POSIX regex],ol_cv_c_posix_regex,[
 dnl Check for POSIX Regex
 AC_DEFUN([OL_POSIX_REGEX], [
 AC_CACHE_CHECK([for compatible POSIX regex],ol_cv_c_posix_regex,[
-       AC_TRY_RUN([
+       AC_RUN_IFELSE([AC_LANG_SOURCE([[
 #include <sys/types.h>
 #include <regex.h>
 static char *pattern, *string;
 #include <sys/types.h>
 #include <regex.h>
 static char *pattern, *string;
@@ -875,17 +816,14 @@ main()
        regfree(&re);
 
        return rc;
        regfree(&re);
 
        return rc;
-}],
-       [ol_cv_c_posix_regex=yes],
-       [ol_cv_c_posix_regex=no],
-       [ol_cv_c_posix_regex=cross])])
+}]])],[ol_cv_c_posix_regex=yes],[ol_cv_c_posix_regex=no],[ol_cv_c_posix_regex=cross])])
 ])
 dnl
 dnl ====================================================================
 dnl Check if toupper() requires islower() to be called first
 AC_DEFUN([OL_C_UPPER_LOWER],
 [AC_CACHE_CHECK([if toupper() requires islower()],ol_cv_c_upper_lower,[
 ])
 dnl
 dnl ====================================================================
 dnl Check if toupper() requires islower() to be called first
 AC_DEFUN([OL_C_UPPER_LOWER],
 [AC_CACHE_CHECK([if toupper() requires islower()],ol_cv_c_upper_lower,[
-       AC_TRY_RUN([
+       AC_RUN_IFELSE([AC_LANG_SOURCE([[
 #include <ctype.h>
 main()
 {
 #include <ctype.h>
 main()
 {
@@ -893,32 +831,28 @@ main()
                exit(0);
        else
                exit(1);
                exit(0);
        else
                exit(1);
-}],
-       [ol_cv_c_upper_lower=no],
-       [ol_cv_c_upper_lower=yes],
-       [ol_cv_c_upper_lower=safe])])
+}]])],[ol_cv_c_upper_lower=no],[ol_cv_c_upper_lower=yes],[ol_cv_c_upper_lower=safe])])
 if test $ol_cv_c_upper_lower != no ; then
        AC_DEFINE(C_UPPER_LOWER,1, [define if toupper() requires islower()])
 fi
 ])
 dnl
 dnl ====================================================================
 if test $ol_cv_c_upper_lower != no ; then
        AC_DEFINE(C_UPPER_LOWER,1, [define if toupper() requires islower()])
 fi
 ])
 dnl
 dnl ====================================================================
+dnl Error string checks
+dnl
 dnl Check for declaration of sys_errlist in one of stdio.h and errno.h.
 dnl Declaration of sys_errlist on BSD4.4 interferes with our declaration.
 dnl Reported by Keith Bostic.
 AC_DEFUN([OL_SYS_ERRLIST],
 [AC_CACHE_CHECK([declaration of sys_errlist],ol_cv_dcl_sys_errlist,[
 dnl Check for declaration of sys_errlist in one of stdio.h and errno.h.
 dnl Declaration of sys_errlist on BSD4.4 interferes with our declaration.
 dnl Reported by Keith Bostic.
 AC_DEFUN([OL_SYS_ERRLIST],
 [AC_CACHE_CHECK([declaration of sys_errlist],ol_cv_dcl_sys_errlist,[
-       AC_TRY_COMPILE([
+       AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
 #include <stdio.h>
 #include <sys/types.h>
 #include <errno.h>
 #include <stdio.h>
 #include <sys/types.h>
 #include <errno.h>
-#ifdef WINNT
+#ifdef _WIN32
 #include <stdlib.h>
 #include <stdlib.h>
-#endif ],
-       [char *c = (char *) *sys_errlist],
-       [ol_cv_dcl_sys_errlist=yes
-       ol_cv_have_sys_errlist=yes],
-       [ol_cv_dcl_sys_errlist=no])])
+#endif ]], [[char *c = (char *) *sys_errlist]])],[ol_cv_dcl_sys_errlist=yes
+       ol_cv_have_sys_errlist=yes],[ol_cv_dcl_sys_errlist=no])])
 #
 # It's possible (for near-UNIX clones) that sys_errlist doesn't exist
 if test $ol_cv_dcl_sys_errlist = no ; then
 #
 # It's possible (for near-UNIX clones) that sys_errlist doesn't exist
 if test $ol_cv_dcl_sys_errlist = no ; then
@@ -926,27 +860,60 @@ if test $ol_cv_dcl_sys_errlist = no ; then
                [define if sys_errlist is not declared in stdio.h or errno.h])
 
        AC_CACHE_CHECK([existence of sys_errlist],ol_cv_have_sys_errlist,[
                [define if sys_errlist is not declared in stdio.h or errno.h])
 
        AC_CACHE_CHECK([existence of sys_errlist],ol_cv_have_sys_errlist,[
-               AC_TRY_LINK([#include <errno.h>],
-                       [char *c = (char *) *sys_errlist],
-                       [ol_cv_have_sys_errlist=yes],
-                       [ol_cv_have_sys_errlist=no])])
+               AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <errno.h>]], [[char *c = (char *) *sys_errlist]])],[ol_cv_have_sys_errlist=yes],[ol_cv_have_sys_errlist=no])])
 fi
 if test $ol_cv_have_sys_errlist = yes ; then
        AC_DEFINE(HAVE_SYS_ERRLIST,1,
                [define if you actually have sys_errlist in your libs])
 fi
 ])dnl
 fi
 if test $ol_cv_have_sys_errlist = yes ; then
        AC_DEFINE(HAVE_SYS_ERRLIST,1,
                [define if you actually have sys_errlist in your libs])
 fi
 ])dnl
+AC_DEFUN([OL_NONPOSIX_STRERROR_R],
+[AC_CACHE_CHECK([non-posix strerror_r],ol_cv_nonposix_strerror_r,[
+       AC_EGREP_CPP(strerror_r,[#include <string.h>],
+               ol_decl_strerror_r=yes, ol_decl_strerror_r=no)dnl
+
+       if test $ol_decl_strerror_r = yes ; then
+               AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <string.h>]], [[   /* from autoconf 2.59 */
+                               char buf[100];
+                               char x = *strerror_r (0, buf, sizeof buf);
+                               char *p = strerror_r (0, buf, sizeof buf);
+                       ]])],[ol_cv_nonposix_strerror_r=yes],[ol_cv_nonposix_strerror_r=no])
+       else
+               AC_RUN_IFELSE([AC_LANG_SOURCE([[
+                       main() {
+                               char buf[100];
+                               buf[0] = 0;
+                               strerror_r( 1, buf, sizeof buf );
+                               exit( buf[0] == 0 );
+                       }
+                       ]])],[ol_cv_nonposix_strerror_r=yes],[ol_cv_nonposix_strerror=no],[ol_cv_nonposix_strerror=no])
+       fi
+       ])
+if test $ol_cv_nonposix_strerror_r = yes ; then
+       AC_DEFINE(HAVE_NONPOSIX_STRERROR_R,1,
+               [define if strerror_r returns char* instead of int])
+fi
+])dnl
 dnl
 dnl
+AC_DEFUN([OL_STRERROR],
+[OL_SYS_ERRLIST dnl TEMPORARY
+AC_CHECK_FUNCS(strerror strerror_r)
+ol_cv_func_strerror_r=no
+if test "${ac_cv_func_strerror_r}" = yes ; then
+       OL_NONPOSIX_STRERROR_R
+elif test "${ac_cv_func_strerror}" = no ; then
+       OL_SYS_ERRLIST
+fi
+])dnl
 dnl ====================================================================
 dnl Early MIPS compilers (used in Ultrix 4.2) don't like
 dnl "int x; int *volatile a = &x; *a = 0;"
 dnl    -- borrowed from PDKSH
 dnl ====================================================================
 dnl Early MIPS compilers (used in Ultrix 4.2) don't like
 dnl "int x; int *volatile a = &x; *a = 0;"
 dnl    -- borrowed from PDKSH
-AC_DEFUN(OL_C_VOLATILE,
+AC_DEFUN([OL_C_VOLATILE],
  [AC_CACHE_CHECK(if compiler understands volatile, ol_cv_c_volatile,
  [AC_CACHE_CHECK(if compiler understands volatile, ol_cv_c_volatile,
-    [AC_TRY_COMPILE([int x, y, z;],
-      [volatile int a; int * volatile b = x ? &y : &z;
+    [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[int x, y, z;]], [[volatile int a; int * volatile b = x ? &y : &z;
       /* Older MIPS compilers (eg., in Ultrix 4.2) don't like *b = 0 */
       /* Older MIPS compilers (eg., in Ultrix 4.2) don't like *b = 0 */
-      *b = 0;], ol_cv_c_volatile=yes, ol_cv_c_volatile=no)])
+      *b = 0;]])],[ol_cv_c_volatile=yes],[ol_cv_c_volatile=no])])
   if test $ol_cv_c_volatile = yes; then
     : 
   else
   if test $ol_cv_c_volatile = yes; then
     : 
   else
@@ -960,13 +927,12 @@ AC_DEFUN([OL_LIB_FETCH],
 [ol_LIBS=$LIBS
 LIBS="-lfetch -lcom_err $LIBS"
 AC_CACHE_CHECK([fetch(3) library],ol_cv_lib_fetch,[
 [ol_LIBS=$LIBS
 LIBS="-lfetch -lcom_err $LIBS"
 AC_CACHE_CHECK([fetch(3) library],ol_cv_lib_fetch,[
-       AC_TRY_LINK([
+       AC_LINK_IFELSE([AC_LANG_PROGRAM([[
+#ifdef HAVE_SYS_PARAM_H
 #include <sys/param.h>
 #include <sys/param.h>
+#endif
 #include <stdio.h>
 #include <stdio.h>
-#include <fetch.h>],
-       [struct url *u = fetchParseURL("file:///"); ],
-       [ol_cv_lib_fetch=yes],
-       [ol_cv_lib_fetch=no])])
+#include <fetch.h>]], [[struct url *u = fetchParseURL("file:///"); ]])],[ol_cv_lib_fetch=yes],[ol_cv_lib_fetch=no])])
 LIBS=$ol_LIBS
 if test $ol_cv_lib_fetch != no ; then
        ol_link_fetch="-lfetch -lcom_err"
 LIBS=$ol_LIBS
 if test $ol_cv_lib_fetch != no ; then
        ol_link_fetch="-lfetch -lcom_err"
@@ -976,41 +942,10 @@ fi
 ])dnl
 dnl
 dnl ====================================================================
 ])dnl
 dnl
 dnl ====================================================================
-dnl Define sig_atomic_t if not defined in signal.h
-AC_DEFUN(OL_TYPE_SIG_ATOMIC_T,
- [AC_CACHE_CHECK(for sig_atomic_t, ol_cv_type_sig_atomic_t,
-    [AC_TRY_COMPILE([#include <signal.h>], [sig_atomic_t atomic;],
-               ol_cv_type_sig_atomic_t=yes, ol_cv_type_sig_atomic_t=no)])
-  if test $ol_cv_type_sig_atomic_t = no; then
-    AC_DEFINE(sig_atomic_t,int,
-               [define to atomic type if sig_atomic_t is not available])
-  fi
- ])dnl
-dnl
-dnl ====================================================================
-dnl Define socklen_t if not defined in sys/types.h or sys/socket.h
-AC_DEFUN(OL_TYPE_SOCKLEN_T,
- [AC_CACHE_CHECK(for socklen_t, ol_cv_type_socklen_t,
-    [AC_TRY_COMPILE([
-#ifdef HAVE_SYS_TYPES_H
-#include <sys/types.h>
-#endif
-#ifdef HAVE_SYS_SOCKET_H
-#include <sys/socket.h>
-#endif
-], [socklen_t len;],
-               ol_cv_type_socklen_t=yes, ol_cv_type_socklen_t=no)])
-  if test $ol_cv_type_socklen_t = no; then
-    AC_DEFINE(socklen_t, int,
-               [define to int if socklen_t is not available])
-  fi
- ])dnl
-dnl
-dnl ====================================================================
 dnl Define inet_aton is available
 dnl Define inet_aton is available
-AC_DEFUN(OL_FUNC_INET_ATON,
+AC_DEFUN([OL_FUNC_INET_ATON],
  [AC_CACHE_CHECK([for inet_aton()], ol_cv_func_inet_aton,
  [AC_CACHE_CHECK([for inet_aton()], ol_cv_func_inet_aton,
-    [AC_TRY_LINK([
+    [AC_LINK_IFELSE([AC_LANG_PROGRAM([[
 #ifdef HAVE_SYS_TYPES_H
 #      include <sys/types.h>
 #endif
 #ifdef HAVE_SYS_TYPES_H
 #      include <sys/types.h>
 #endif
@@ -1024,9 +959,8 @@ AC_DEFUN(OL_FUNC_INET_ATON,
 #              include <arpa/inet.h>
 #      endif
 #endif
 #              include <arpa/inet.h>
 #      endif
 #endif
-], [struct in_addr in;
-int rc = inet_aton( "255.255.255.255", &in );],
-               ol_cv_func_inet_aton=yes, ol_cv_func_inet_aton=no)])
+]], [[struct in_addr in;
+int rc = inet_aton( "255.255.255.255", &in );]])],[ol_cv_func_inet_aton=yes],[ol_cv_func_inet_aton=no])])
   if test $ol_cv_func_inet_aton != no; then
     AC_DEFINE(HAVE_INET_ATON, 1,
                [define to you inet_aton(3) is available])
   if test $ol_cv_func_inet_aton != no; then
     AC_DEFINE(HAVE_INET_ATON, 1,
                [define to you inet_aton(3) is available])
@@ -1035,25 +969,19 @@ int rc = inet_aton( "255.255.255.255", &in );],
 dnl
 dnl ====================================================================
 dnl check no of arguments for ctime_r
 dnl
 dnl ====================================================================
 dnl check no of arguments for ctime_r
-AC_DEFUN(OL_FUNC_CTIME_R_NARGS,
+AC_DEFUN([OL_FUNC_CTIME_R_NARGS],
  [AC_CACHE_CHECK(number of arguments of ctime_r, ol_cv_func_ctime_r_nargs,
  [AC_CACHE_CHECK(number of arguments of ctime_r, ol_cv_func_ctime_r_nargs,
-   [AC_TRY_COMPILE([#include <time.h>],
-               [time_t ti; char *buffer; ctime_r(&ti,buffer,32);],
-                       ol_cv_func_ctime_r_nargs3=yes,
-                       ol_cv_func_ctime_r_nargs3=no)
+   [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <time.h>]], [[time_t ti; char *buffer; ctime_r(&ti,buffer,32);]])],[ol_cv_func_ctime_r_nargs3=yes],[ol_cv_func_ctime_r_nargs3=no])
 
 
-       AC_TRY_COMPILE([#include <time.h>],
-               [time_t ti; char *buffer; ctime_r(&ti,buffer);],
-                       ol_cv_func_ctime_r_nargs2=yes,
-                       ol_cv_func_ctime_r_nargs2=no)
+       AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <time.h>]], [[time_t ti; char *buffer; ctime_r(&ti,buffer);]])],[ol_cv_func_ctime_r_nargs2=yes],[ol_cv_func_ctime_r_nargs2=no])
 
 
-       if test $ol_cv_func_ctime_r_nargs3 = yes -a \
-               $ol_cv_func_ctime_r_nargs2 = no ; then
+       if test $ol_cv_func_ctime_r_nargs3 = yes &&
+          test $ol_cv_func_ctime_r_nargs2 = no ; then
 
                ol_cv_func_ctime_r_nargs=3
 
 
                ol_cv_func_ctime_r_nargs=3
 
-       elif test $ol_cv_func_ctime_r_nargs3 = no -a \
-               $ol_cv_func_ctime_r_nargs2 = yes ; then
+       elif test $ol_cv_func_ctime_r_nargs3 = no &&
+            test $ol_cv_func_ctime_r_nargs2 = yes ; then
 
                ol_cv_func_ctime_r_nargs=2
 
 
                ol_cv_func_ctime_r_nargs=2
 
@@ -1070,11 +998,9 @@ AC_DEFUN(OL_FUNC_CTIME_R_NARGS,
 dnl
 dnl --------------------------------------------------------------------
 dnl check return type of ctime_r()
 dnl
 dnl --------------------------------------------------------------------
 dnl check return type of ctime_r()
-AC_DEFUN(OL_FUNC_CTIME_R_TYPE,
+AC_DEFUN([OL_FUNC_CTIME_R_TYPE],
  [AC_CACHE_CHECK(return type of ctime_r, ol_cv_func_ctime_r_type,
  [AC_CACHE_CHECK(return type of ctime_r, ol_cv_func_ctime_r_type,
-   [AC_TRY_COMPILE([#include <time.h>],
-               [extern int (ctime_r)();],
-                       ol_cv_func_ctime_r_type="int", ol_cv_func_ctime_r_type="charp")
+   [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <time.h>]], [[extern int (ctime_r)();]])],[ol_cv_func_ctime_r_type="int"],[ol_cv_func_ctime_r_type="charp"])
        ])
   if test $ol_cv_func_ctime_r_type = "int" ; then
        AC_DEFINE(CTIME_R_RETURNS_INT,1, [define if ctime_r() returns int])
        ])
   if test $ol_cv_func_ctime_r_type = "int" ; then
        AC_DEFINE(CTIME_R_RETURNS_INT,1, [define if ctime_r() returns int])
@@ -1082,41 +1008,35 @@ AC_DEFUN(OL_FUNC_CTIME_R_TYPE,
 ])dnl
 dnl ====================================================================
 dnl check no of arguments for gethostbyname_r
 ])dnl
 dnl ====================================================================
 dnl check no of arguments for gethostbyname_r
-AC_DEFUN(OL_FUNC_GETHOSTBYNAME_R_NARGS,
+AC_DEFUN([OL_FUNC_GETHOSTBYNAME_R_NARGS],
  [AC_CACHE_CHECK(number of arguments of gethostbyname_r,
        ol_cv_func_gethostbyname_r_nargs,
  [AC_CACHE_CHECK(number of arguments of gethostbyname_r,
        ol_cv_func_gethostbyname_r_nargs,
-       [AC_TRY_COMPILE([#include <sys/types.h>
+       [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <sys/types.h>
 #include <sys/socket.h>
 #include <netinet/in.h>
 #include <netdb.h>
 #include <sys/socket.h>
 #include <netinet/in.h>
 #include <netdb.h>
-#define BUFSIZE (sizeof(struct hostent)+10)],
-               [struct hostent hent; char buffer[BUFSIZE];
+#define BUFSIZE (sizeof(struct hostent)+10)]], [[struct hostent hent; char buffer[BUFSIZE];
                int bufsize=BUFSIZE;int h_errno;
                (void)gethostbyname_r("segovia.cs.purdue.edu", &hent,
                int bufsize=BUFSIZE;int h_errno;
                (void)gethostbyname_r("segovia.cs.purdue.edu", &hent,
-                       buffer, bufsize, &h_errno);],
-               ol_cv_func_gethostbyname_r_nargs5=yes, 
-               ol_cv_func_gethostbyname_r_nargs5=no)
+                       buffer, bufsize, &h_errno);]])],[ol_cv_func_gethostbyname_r_nargs5=yes],[ol_cv_func_gethostbyname_r_nargs5=no])
 
 
-       AC_TRY_COMPILE([#include <sys/types.h>
+       AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <sys/types.h>
 #include <sys/socket.h>
 #include <netinet/in.h>
 #include <netdb.h>
 #include <sys/socket.h>
 #include <netinet/in.h>
 #include <netdb.h>
-#define BUFSIZE (sizeof(struct hostent)+10)],
-               [struct hostent hent;struct hostent *rhent;
+#define BUFSIZE (sizeof(struct hostent)+10)]], [[struct hostent hent;struct hostent *rhent;
                char buffer[BUFSIZE];
                int bufsize=BUFSIZE;int h_errno;
                (void)gethostbyname_r("localhost", &hent, buffer, bufsize,
                char buffer[BUFSIZE];
                int bufsize=BUFSIZE;int h_errno;
                (void)gethostbyname_r("localhost", &hent, buffer, bufsize,
-                       &rhent, &h_errno);],
-               ol_cv_func_gethostbyname_r_nargs6=yes,
-               ol_cv_func_gethostbyname_r_nargs6=no)
+                       &rhent, &h_errno);]])],[ol_cv_func_gethostbyname_r_nargs6=yes],[ol_cv_func_gethostbyname_r_nargs6=no])
 
 
-       if test $ol_cv_func_gethostbyname_r_nargs5 = yes -a \
-               $ol_cv_func_gethostbyname_r_nargs6 = no ; then
+       if test $ol_cv_func_gethostbyname_r_nargs5 = yes &&
+          test $ol_cv_func_gethostbyname_r_nargs6 = no ; then
 
                ol_cv_func_gethostbyname_r_nargs=5
 
 
                ol_cv_func_gethostbyname_r_nargs=5
 
-       elif test $ol_cv_func_gethostbyname_r_nargs5 = no -a \
-               $ol_cv_func_gethostbyname_r_nargs6 = yes ; then
+       elif test $ol_cv_func_gethostbyname_r_nargs5 = no &&
+            test $ol_cv_func_gethostbyname_r_nargs6 = yes ; then
 
                ol_cv_func_gethostbyname_r_nargs=6
 
 
                ol_cv_func_gethostbyname_r_nargs=6
 
@@ -1132,46 +1052,40 @@ AC_DEFUN(OL_FUNC_GETHOSTBYNAME_R_NARGS,
 ])dnl
 dnl
 dnl check no of arguments for gethostbyaddr_r
 ])dnl
 dnl
 dnl check no of arguments for gethostbyaddr_r
-AC_DEFUN(OL_FUNC_GETHOSTBYADDR_R_NARGS,
+AC_DEFUN([OL_FUNC_GETHOSTBYADDR_R_NARGS],
  [AC_CACHE_CHECK(number of arguments of gethostbyaddr_r,
        [ol_cv_func_gethostbyaddr_r_nargs],
  [AC_CACHE_CHECK(number of arguments of gethostbyaddr_r,
        [ol_cv_func_gethostbyaddr_r_nargs],
-       [AC_TRY_COMPILE([#include <sys/types.h>
+       [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <sys/types.h>
 #include <sys/socket.h>
 #include <netinet/in.h>
 #include <netdb.h>
 #include <sys/socket.h>
 #include <netinet/in.h>
 #include <netdb.h>
-#define BUFSIZE (sizeof(struct hostent)+10)],
-          [struct hostent hent; char buffer[BUFSIZE]; 
+#define BUFSIZE (sizeof(struct hostent)+10)]], [[struct hostent hent; char buffer[BUFSIZE]; 
            struct in_addr add;
            size_t alen=sizeof(struct in_addr);
            int bufsize=BUFSIZE;int h_errno;
                (void)gethostbyaddr_r( (void *)&(add.s_addr),
            struct in_addr add;
            size_t alen=sizeof(struct in_addr);
            int bufsize=BUFSIZE;int h_errno;
                (void)gethostbyaddr_r( (void *)&(add.s_addr),
-                       alen, AF_INET, &hent, buffer, bufsize, &h_errno);],
-               ol_cv_func_gethostbyaddr_r_nargs7=yes,
-               ol_cv_func_gethostbyaddr_r_nargs7=no)
+                       alen, AF_INET, &hent, buffer, bufsize, &h_errno);]])],[ol_cv_func_gethostbyaddr_r_nargs7=yes],[ol_cv_func_gethostbyaddr_r_nargs7=no])
 
 
-       AC_TRY_COMPILE([#include <sys/types.h>
+       AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <sys/types.h>
 #include <sys/socket.h>
 #include <netinet/in.h>
 #include <netdb.h>
 #include <sys/socket.h>
 #include <netinet/in.h>
 #include <netdb.h>
-#define BUFSIZE (sizeof(struct hostent)+10)],
-               [struct hostent hent;
+#define BUFSIZE (sizeof(struct hostent)+10)]], [[struct hostent hent;
                struct hostent *rhent; char buffer[BUFSIZE]; 
                struct in_addr add;
                size_t alen=sizeof(struct in_addr);
                int bufsize=BUFSIZE;int h_errno;
                (void)gethostbyaddr_r( (void *)&(add.s_addr),
                        alen, AF_INET, &hent, buffer, bufsize, 
                struct hostent *rhent; char buffer[BUFSIZE]; 
                struct in_addr add;
                size_t alen=sizeof(struct in_addr);
                int bufsize=BUFSIZE;int h_errno;
                (void)gethostbyaddr_r( (void *)&(add.s_addr),
                        alen, AF_INET, &hent, buffer, bufsize, 
-                       &rhent, &h_errno);],
-               ol_cv_func_gethostbyaddr_r_nargs8=yes,
-               ol_cv_func_gethostbyaddr_r_nargs8=no)
+                       &rhent, &h_errno);]])],[ol_cv_func_gethostbyaddr_r_nargs8=yes],[ol_cv_func_gethostbyaddr_r_nargs8=no])
 
 
-       if test $ol_cv_func_gethostbyaddr_r_nargs7 = yes -a \
-               $ol_cv_func_gethostbyaddr_r_nargs8 = no ; then
+       if test $ol_cv_func_gethostbyaddr_r_nargs7 = yes &&
+          test $ol_cv_func_gethostbyaddr_r_nargs8 = no ; then
 
                ol_cv_func_gethostbyaddr_r_nargs=7
 
 
                ol_cv_func_gethostbyaddr_r_nargs=7
 
-       elif test $ol_cv_func_gethostbyaddr_r_nargs7 = no -a \
-               $ol_cv_func_gethostbyaddr_r_nargs8 = yes ; then
+       elif test $ol_cv_func_gethostbyaddr_r_nargs7 = no &&
+            test $ol_cv_func_gethostbyaddr_r_nargs8 = yes ; then
 
                ol_cv_func_gethostbyaddr_r_nargs=8
 
 
                ol_cv_func_gethostbyaddr_r_nargs=8
 
@@ -1187,7 +1101,7 @@ AC_DEFUN(OL_FUNC_GETHOSTBYADDR_R_NARGS,
 ])dnl
 dnl
 dnl --------------------------------------------------------------------
 ])dnl
 dnl
 dnl --------------------------------------------------------------------
-dnl Check for Cyrus SASL version compatility, need 2.1.3 or newer
+dnl Check for Cyrus SASL version compatility
 AC_DEFUN([OL_SASL_COMPAT],
 [AC_CACHE_CHECK([Cyrus SASL library version], [ol_cv_sasl_compat],[
        AC_EGREP_CPP(__sasl_compat,[
 AC_DEFUN([OL_SASL_COMPAT],
 [AC_CACHE_CHECK([Cyrus SASL library version], [ol_cv_sasl_compat],[
        AC_EGREP_CPP(__sasl_compat,[
@@ -1197,14 +1111,28 @@ AC_DEFUN([OL_SASL_COMPAT],
 #include <sasl.h>
 #endif
 
 #include <sasl.h>
 #endif
 
-/* require 2.1.3 or later */
-#if SASL_VERSION_MAJOR == 1  && SASL_VERSION_MINOR >= 5
-       char *__sasl_compat = "1.5.x okay";
-#elif SASL_VERSION_MAJOR == 2  && SASL_VERSION_MINOR > 1
-       __sasl_compat "2.2+ or better okay (we guess)";
+/* Require 2.1.15+ */
+#if SASL_VERSION_MAJOR == 2  && SASL_VERSION_MINOR > 1
+       char *__sasl_compat = "2.2+ or better okay (we guess)";
 #elif SASL_VERSION_MAJOR == 2  && SASL_VERSION_MINOR == 1 \
 #elif SASL_VERSION_MAJOR == 2  && SASL_VERSION_MINOR == 1 \
-       && SASL_VERSION_STEP >=3
-       __sasl_compat = "2.1.3+ or better okay";
+       && SASL_VERSION_STEP >=15
+       char *__sasl_compat = "2.1.15+ or better okay";
 #endif
        ],      [ol_cv_sasl_compat=yes], [ol_cv_sasl_compat=no])])
 ])
 #endif
        ],      [ol_cv_sasl_compat=yes], [ol_cv_sasl_compat=no])])
 ])
+dnl ====================================================================
+dnl check for SSL compatibility
+AC_DEFUN([OL_SSL_COMPAT],
+[AC_CACHE_CHECK([OpenSSL library version (CRL checking capability)],
+       [ol_cv_ssl_crl_compat],[
+               AC_EGREP_CPP(__ssl_compat,[
+#ifdef HAVE_OPENSSL_SSL_H
+#include <openssl/ssl.h>
+#endif
+
+/* Require 0.9.7d+ */
+#if OPENSSL_VERSION_NUMBER >= 0x0090704fL
+       char *__ssl_compat = "0.9.7d";
+#endif
+       ], [ol_cv_ssl_crl_compat=yes], [ol_cv_ssl_crl_compat=no])])
+])