Update doc files.
[shibboleth/cpp-sp.git] / configure.ac
index d7fb307..25f85e1 100644 (file)
@@ -1,7 +1,7 @@
 AC_PREREQ([2.50])
-AC_INIT([shibboleth], [1.3], [shibboleth-users@internet2.edu], [shibboleth])
+AC_INIT([shibboleth], [1.3.4], [shibboleth-users@internet2.edu], [shibboleth])
 AM_CONFIG_HEADER(config.h)
-AM_INIT_AUTOMAKE([shibboleth],[1.3])
+AM_INIT_AUTOMAKE([shibboleth],[1.3.4])
 
 sinclude(acx_pthread.m4)
 sinclude(acx_rpctest.m4)
@@ -154,24 +154,85 @@ AC_MSG_RESULT(yes)
 
 AC_LANG(C++)
 
-# log4cpp settings
-AC_PATH_PROG(LOG4CPP_CONFIG,log4cpp-config)
-AC_ARG_WITH(log4cpp,
-            AC_HELP_STRING([--with-log4cpp=PATH], [where log4cpp is installed]),
-            [LOG4CPP_CONFIG="${with_log4cpp}/bin/log4cpp-config"])
-if test -f "${LOG4CPP_CONFIG}"; then
-    LDFLAGS="`${LOG4CPP_CONFIG} --libs` $LDFLAGS"
-    CPPFLAGS="`${LOG4CPP_CONFIG} --cflags` $CPPFLAGS"
+# Thank you Solaris, really.
+AC_MSG_CHECKING(for ctime_r)
+ if test -z "$ac_cv_ctime_args"; then
+     AC_TRY_COMPILE(
+     [#include <time.h>],
+     [
+         time_t clock;
+         char buf[26];
+         ctime_r(&clock, buf);
+     ], ac_cv_ctime_args=2)
+
+     AC_TRY_COMPILE(
+     [#include <time.h>],
+     [
+         time_t clock;
+         char buf[26];
+         ctime_r(&clock, buf, 26);
+     ], ac_cv_ctime_args=3)
+ fi
+ if test -z "$ac_cv_ctime_args"; then
+     AC_MSG_RESULT(no)
+ else
+     if test "$ac_cv_ctime_args" = 2; then
+         AC_DEFINE(HAVE_CTIME_R_2,1,[Define if ctime_r is present with 2 parameters.])
+     elif test "$ac_cv_ctime_args" = 3; then
+         AC_DEFINE(HAVE_CTIME_R_3,1,[Define if ctime_r is present with 3 parameters.])
+     fi
+     AC_MSG_RESULT([yes, and it takes $ac_cv_ctime_args arguments])
+ fi 
+
+# log4shib settings (favor this version over the log4cpp code)
+AC_PATH_PROG(LOG4SHIB_CONFIG,log4shib-config)
+AC_ARG_WITH(log4shib,
+    AC_HELP_STRING([--with-log4shib=PATH], [where log4shib-config is installed]),
+    [
+    LOG4SHIB_CONFIG="${with_log4shib}"
+    if ! test -f "${LOG4SHIB_CONFIG}" ; then
+       LOG4SHIB_CONFIG="${with_log4shib}/bin/log4shib-config"
+    fi
+    ])
+if test -f "${LOG4SHIB_CONFIG}"; then
+    LDFLAGS="`${LOG4SHIB_CONFIG} --libs` $LDFLAGS"
+    CPPFLAGS="`${LOG4SHIB_CONFIG} --cflags` $CPPFLAGS"
+       AC_CHECK_HEADER([log4shib/CategoryStream.hh],,AC_MSG_ERROR([unable to find log4shib header files]))
+       AC_TRY_LINK(
+               [#include <log4shib/Category.hh>
+#include <log4shib/CategoryStream.hh>],
+               [log4shib::Category::getInstance("foo").errorStream() << log4shib::eol],
+               [AC_DEFINE(HAVE_LOG4SHIB,1,[Define if log4shib library is used.])],
+               [AC_MSG_ERROR([unable to link with log4shib])])
 else
-    AC_MSG_WARN([log4cpp-config not found, guessing at log4cpp build settings])
-    LIBS="-llog4cpp $LIBS"
+    AC_MSG_WARN([log4shib-config not found, may need to use --with-log4shib option])
+    AC_MSG_WARN([will look for original log4cpp library])
+    
+       # log4cpp settings
+       AC_PATH_PROG(LOG4CPP_CONFIG,log4cpp-config)
+       AC_ARG_WITH(log4cpp,
+           AC_HELP_STRING([--with-log4cpp=PATH], [where log4cpp-config is installed]),
+           [
+           LOG4CPP_CONFIG="${with_log4cpp}"
+           if ! test -f "${LOG4CPP_CONFIG}" ; then
+               LOG4CPP_CONFIG="${with_log4cpp}/bin/log4cpp-config"
+           fi
+           ])
+       if test -f "${LOG4CPP_CONFIG}"; then
+               AC_MSG_WARN([will try to use log4cpp, note that most non-Internet2 supplied versions are not thread-safe])
+           LDFLAGS="`${LOG4CPP_CONFIG} --libs` $LDFLAGS"
+           CPPFLAGS="`${LOG4CPP_CONFIG} --cflags` $CPPFLAGS"
+               AC_CHECK_HEADER([log4cpp/CategoryStream.hh],,AC_MSG_ERROR([unable to find log4cpp header files]))
+               AC_TRY_LINK(
+                       [#include <log4cpp/Category.hh>
+#include <log4cpp/CategoryStream.hh>],
+                       [log4cpp::Category::getInstance("foo").errorStream() << log4cpp::eol],
+                       [AC_DEFINE(HAVE_LOG4CPP,1,[Define if log4cpp library is used.])],
+                       [AC_MSG_ERROR([unable to link with log4cpp, at least version 1.0 needed])])
+       else
+           AC_MSG_ERROR([log4cpp-config not found, may need to use --with-log4cpp option])
+       fi
 fi
-AC_CHECK_HEADER([log4cpp/Category.hh],,AC_MSG_ERROR([unable to find log4cpp header files]))
-AC_TRY_LINK(
-       [#include <log4cpp/Category.hh>],
-       [log4cpp::Category::getInstance("foo")],
-       [AC_DEFINE(HAVE_LIBLOG4CPP,1,[Define if log4cpp library was found])],
-       [AC_MSG_ERROR([unable to link with log4cpp])])
 
 # Xerces settings
 AC_ARG_WITH(xerces, 
@@ -186,13 +247,13 @@ AC_CHECK_HEADER([xercesc/dom/DOM.hpp],,
 AC_MSG_CHECKING([Xerces version])
 AC_PREPROC_IFELSE(
         [AC_LANG_PROGRAM([#include <xercesc/util/XercesVersion.hpp>],
-[#if  _XERCES_VERSION > 20200 && _XERCES_VERSION != 20600
+[#if  _XERCES_VERSION > 20200 && _XERCES_VERSION != 20600 && _XERCES_VERSION < 30000
 int i = 0;
 #else
-#error requires version > 2.2.0 but not 2.6.0
+#error requires version > 2.2.0, < 3.0, but not 2.6.0
 #endif])],
         [AC_MSG_RESULT(OK)],
-        [AC_MSG_ERROR([Shibboleth requires patched Xerces version 2.6.1 (http://shibboleth.internet2.edu/downloads/)])])
+        [AC_MSG_ERROR([Found unsupported Xerces-C version.])])
 AC_TRY_LINK(
         [#include <xercesc/util/PlatformUtils.hpp>],
         [xercesc::XMLPlatformUtils::Initialize()],
@@ -208,7 +269,17 @@ AC_ARG_WITH(xmlsec,
                 CPPFLAGS="-I${with_xmlsec}/include $CPPFLAGS"
             fi])
 LIBS="-lxml-security-c $LIBS"
-AC_CHECK_HEADER([xsec/xenc/XENCEncryptionMethod.hpp],,AC_MSG_ERROR([unable to find xml-security 1.1 header files]),[#include <xercesc/dom/DOM.hpp>])
+AC_CHECK_HEADER([xsec/xenc/XENCEncryptionMethod.hpp],,AC_MSG_ERROR([unable to find xml-security header files]),[#include <xercesc/dom/DOM.hpp>])
+AC_MSG_CHECKING([XML-Security version])
+AC_PREPROC_IFELSE(
+    [AC_LANG_PROGRAM([#include <xsec/utils/XSECPlatformUtils.hpp>],
+        [#if XSEC_VERSION_MAJOR > 1 || (XSEC_VERSION_MAJOR == 1 && XSEC_VERSION_MEDIUM > 2)
+int i = 0;
+#else
+#error need version 1.3.0 or later
+#endif])],
+    [AC_MSG_RESULT(OK)],
+    [AC_MSG_FAILURE([XML-Security version 1.3.0 or greater is required.])])
 AC_TRY_LINK(
         [#include <xsec/utils/XSECPlatformUtils.hpp>],
         [XSECPlatformUtils::Initialise()],
@@ -295,308 +366,344 @@ if test ! "$WANT_NSAPI" = "no" ; then
 fi
 
 
+#
+# Build FastCGI support?
+#
+AC_MSG_CHECKING(for FastCGI support)
+AC_ARG_WITH(fastcgi,
+    AC_HELP_STRING([--with-fastcgi=DIR], [Build FastCGI support]),
+    [WANT_FASTCGI=$withval],[WANT_FASTCGI=no])
+AC_MSG_RESULT($WANT_FASTCGI)
+
+if test "$WANT_FASTCGI" != "no"; then
+    if test "$WANT_FASTCGI" != "yes"; then
+        if test x_$WANT_FASTCGI != x_/usr; then
+            FASTCGI_INCLUDE="-I$WANT_FASTCGI/include"
+            FASTCGI_LDFLAGS="-L$WANT_FASTCGI/lib"
+        fi
+    fi
+    AC_CHECK_HEADER([fcgio.h],,
+        AC_MSG_ERROR([unable to find FastCGI header files]))
+    FASTCGI_LIBS="-lfcgi -lfcgi++"
+fi
+
+AC_SUBST(FASTCGI_INCLUDE)
+AC_SUBST(FASTCGI_LDFLAGS)
+AC_SUBST(FASTCGI_LIBS)
+
+# always output the Makefile, even if you don't use it
+AC_CONFIG_FILES([fastcgi/Makefile])
+AM_CONDITIONAL(BUILD_FASTCGI,test ! "$WANT_FASTCGI" = "no")
+if test ! "$WANT_FASTCGI" = "no" ; then
+    WANT_SUBDIRS="$WANT_SUBDIRS fastcgi"
+fi
+
+
+#
+# If no --enable-apache-xx specified 
+# find a default and fake the specific parameters
+#
+
+# simple macro to peek at an enable or a with
+AC_DEFUN([Peek],
+if test "[${[$1]_][$2]+set}" = set; then
+  peekval="${[$1]_[$2]}"
+  $3
+fi; dnl
+)
+
+AC_MSG_CHECKING(if default apache needed)
+need_default=yes
+Peek(enable,apache_13,need_default=no)
+Peek(enable,apache_20,need_default=no)
+Peek(enable,apache_22,need_default=no)
+AC_MSG_RESULT($need_default)
+
+if test "$need_default" = "yes"; then
+  # find an apxs, then the httpd
+  xs=
+  Peek(with,apxs,xs="$peekval")
+  Peek(with,apxs2,xs="$peekval")
+  Peek(with,apxs22,xs="$peekval")
+  if test "x$xs" = "x"; then
+     AC_PATH_PROGS(xs, apxs2 apxs,
+        AC_MSG_ERROR(No apxs, no apache found.  Try --with-apxs),
+        [/usr/local/apache2/bin:/usr/local/apache/bin:/usr/sbin:$PATH])
+  fi
+  # ask the daemon for the version and set parameters
+  AC_MSG_CHECKING(default apache version)
+  httpd="`$xs -q SBINDIR`/`$xs -q TARGET`"
+  if test "x$httpd" != "x" && test -f $httpd ; then
+     v=`$httpd -v|$SED -n -e 's/.*Apache\/\.*//p'`
+     case $v in
+       1.3*)   [enable_apache_13]=yes
+               [with_apxs]=$xs
+               AC_MSG_RESULT(1.3)
+               ;;
+       2.0*)   [enable_apache_20]=yes
+               [with_apxs2]=$xs
+               AC_MSG_RESULT(2.0)
+               ;;
+       2.2*)   [enable_apache_22]=yes
+               [with_apxs22]=$xs
+               AC_MSG_RESULT(2.2)
+               ;;
+       *)      AC_MSG_ERROR(unusable apache versions: $v. Try setting --with-apxs)
+     esac
+  else 
+     AC_MSG_RESULT(cannot determine version.  Try setting --with-apxs)
+  fi
+fi
+
+
 # Apache 1.3 (mod_shib_13)
 #   --enable-apache-13
 #   --with-apxs      (DSO build, the normal way, uses apxs to derive build flags)
-#   --without-apxs   (DSO build, you tell us how to build using the environment)
 
 AC_ARG_ENABLE(apache-13,
-       AC_HELP_STRING([--enable-apache-13], [enable the Apache 1.3 modules]),
+       AC_HELP_STRING([--enable-apache-13], [enable the Apache 1.3 module]),
        [ if test "x$enableval" = "x" ; then
               WANT_APACHE_13=yes
          else
              WANT_APACHE_13="$enableval"
          fi
-       ], [ WANT_APACHE_13=no ])
-AC_MSG_CHECKING(whether to build Apache-1.3 support)
+       ],[ WANT_APACHE_13=no ])
+AC_MSG_CHECKING(whether to build Apache 1.3 module)
 if test "$WANT_APACHE_13" != yes && test "$WANT_APACHE_13" != no ; then
    WANT_APACHE_13=yes
 fi
 AC_MSG_RESULT($WANT_APACHE_13)
 
-if test "$WANT_APACHE_13" = yes ; then
-
-AC_ARG_WITH(apxs,
-[  --with-apxs[=FILE]        Build shared Apache module(s). FILE is the optional
-                          pathname to the Apache apxs tool; defaults to "apxs".],
-[
-    if test "$withval" = "yes"; then
-      for i in /usr/sbin /usr/local/apache/bin ; do
-        if test -f "$i/apxs"; then
-          APXS="$i/apxs"
-        fi
-      done
-      if test -z "$APXS"; then
-        APXS=apxs
-      fi
-    else
-      APXS="$withval"
-    fi
-],
-[
-    AC_PATH_PROG(APXS, apxs, no)
-])
-
-AC_MSG_CHECKING([for dynamic Apache-1.3 module support (w/ or w/o APXS)])
-if test "$APXS" = "no"; then
-
-    # --without-apxs means you want the modules,
-    #       but want to tell us how to build them
-    AC_MSG_RESULT(yes, but use environment, not apxs)
-    echo
-    echo "Did you set one or more of these?"
-    echo
-    echo "APXS_CFLAGS APXS_PREFIX APXS_INCLUDE APXS_LIBEXEC APXS_SYSCONFDIR"
-    echo
-
-    AC_MSG_NOTICE([APXS_CFLAGS is $APXS_CFLAGS])
-
-    # try and find the Apache root
-    if test -z "$APXS_PREFIX"; then
-        if test -d "/usr/local/apache"; then
-            APXS_PREFIX="/usr/local/apache"
-        else
-            AC_MSG_ERROR([You MUST set APXS_PREFIX so the right Apache can be located!])
-        fi
-    elif test ! -d "$APXS_PREFIX"; then
-        AC_MSG_ERROR([APXS_PREFIX of $APXS_PREFIX cannot be found])
-    fi
-    AC_MSG_NOTICE([APXS_PREFIX is $APXS_PREFIX])
-    
-
-    # other subfolders might be derived from APXS_PREFIX
-    if test -z "$APXS_INCLUDE"; then
-        if test -f "$APXS_PREFIX/include/httpd.h"; then
-            APXS_INCLUDE="$APXS_PREFIX/include"
-        else
-            AC_MSG_ERROR([can't find Apache include files beneath $APXS_PREFIX])
+if test "$WANT_APACHE_13" = "yes" ; then
+    AC_ARG_WITH(apxs, 
+        AC_HELP_STRING([--with-apxs=FILE], [Specifies where to find the Apache 1.3 apxs script.]),
+        [
+        AC_MSG_CHECKING(for user-specified apxs name/location)
+        if test "$withval" != "no" ; then
+          if test "$withval" != "yes"; then
+            APXS=$withval
+            AC_MSG_RESULT("$withval")
+          fi
         fi
-    elif ! test -f "$APXS_INCLUDE/httpd.h"; then
-        AC_MSG_ERROR([APXS_INCLUDE of $APXS_INCLUDE does not contain Apache headers])
-    fi
-    AC_MSG_NOTICE([APXS_INCLUDE is $APXS_INCLUDE])
-
-    if test -z "$APXS_LIBEXEC"; then
-        if test -d "$APXS_PREFIX/libexec"; then
-            APXS_LIBEXEC="$APXS_PREFIX/libexec"
-        elif test -d "$APXS_PREFIX/modules"; then
-            APXS_LIBEXEC="$APXS_PREFIX/modules"
-        else
-            AC_MSG_ERROR([can't find Apache libexec/module directory beneath $APXS_PREFIX])
+        ],
+        [
+        AC_PATH_PROG(APXS, apxs, no)
+        if test "$APXS" = "no" ; then
+          for i in /usr/sbin /usr/local/apache/bin ; do
+            if test "$APXS" = "no" && test -f "$i/apxs"; then
+              APXS="$i/apxs"
+            fi
+          done
         fi
-    elif ! test -d "$APXS_LIBEXEC"; then
-        AC_MSG_ERROR([APXS_LIBEXEC of $APXS_LIBEXEC does not exist])
-    fi
-    AC_MSG_NOTICE([APXS_LIBEXEC is $APXS_LIBEXEC])
+        ])
 
-    if test -z "$APXS_SYSCONFDIR"; then
-        if test -d "$APXS_PREFIX/conf"; then
-            APXS_SYSCONFDIR="$APXS_PREFIX/conf"
-        else
-            AC_MSG_ERROR([can't find Apache conf directory beneath $APXS_PREFIX])
-        fi
-    elif ! test -d "$APXS_SYSCONFDIR"; then
-        AC_MSG_ERROR([APXS_SYSCONFDIR of $APXS_SYSCONFDIR does not exist])
+    AC_MSG_CHECKING([to see if apxs was located])
+    if test ! -f "$APXS" ; then
+        AC_MSG_RESULT(no)
+        AC_MSG_ERROR([Unable to locate apxs script. An Apache development package may be missing from your server, or you may need to use the --with-apxs option.])
     fi
-    AC_MSG_NOTICE([APXS_SYSCONFDIR is $APXS_SYSCONFDIR])
-
-    WANT_APACHE_13="yes"
-
-elif test -n "$APXS"; then
+    AC_MSG_RESULT($APXS)
+    AC_SUBST(APXS)
 
     # extract settings we need from APXS -q
     APXS_CC="`$APXS -q CC`"
     APXS_CFLAGS="`$APXS -q CFLAGS` `$APXS -q CFLAGS_SHLIB`"
     APXS_INCLUDE="`$APXS -q INCLUDEDIR`"
-    APXS_LIBEXEC="`$APXS -q LIBEXECDIR`"
-    APXS_SYSCONFDIR="`$APXS -q SYSCONFDIR`"
-
-    AC_SUBST(APXS)
-    AC_MSG_RESULT(found at $APXS)
-
-    if test -z "`$APXS -q LD_SHLIB`" || test "$APXS_LIBEXEC" = "modules"; then
-           AC_MSG_ERROR(
-[Your APXS installation is broken and cannot be used.
-    Please see http://www.webdav.org/mod_dav/install.html#apxs for
-    more information.])
-    fi
-
-    WANT_APACHE_13="yes"
-
-else
-    # guess we're not doing Apache 1.3
-    AC_MSG_RESULT(no)
-    WANT_APACHE_13="no"
-fi
 fi
 
 AC_SUBST(APXS_CFLAGS)
 AC_SUBST(APXS_INCLUDE)
-AC_SUBST(APXS_LIBEXEC)
-AC_SUBST(APXS_SYSCONFDIR)
-AM_CONDITIONAL(HAVE_APXS,test -n "$APXS")
 
 
 # Apache 2.0 (mod_shib_20)
 #   --enable-apache-20
-#   --with-apxs2       (DSO build, the normal way, uses apxs to derive build flags)
-#      --with-apr         (DSO build, APR development package installed separately)
-#   --without-apxs2    (DSO build, you tell us how to build using the environment)
+#   --with-apxs2      (DSO build, the normal way, uses apxs to derive build flags)
+#      --with-apr        (DSO build, APR development package installed separately)
 
 AC_ARG_ENABLE(apache-20,
-       AC_HELP_STRING([--enable-apache-20], [enable the Apache 2.0 modules]),
+       AC_HELP_STRING([--enable-apache-20], [enable the Apache 2.0 module]),
        [ if test "x$enableval" = "x" ; then
               WANT_APACHE_20=yes
          else
              WANT_APACHE_20="$enableval"
          fi
-       ], [ WANT_APACHE_20=no ])
-
-AC_MSG_CHECKING(whether to build Apache-2.0 support)
+       ],[ WANT_APACHE_20=no ])
+AC_MSG_CHECKING(whether to build Apache 2.0 module)
 if test "$WANT_APACHE_20" != yes && test "$WANT_APACHE_20" != no ; then
    WANT_APACHE_20=yes
 fi
 AC_MSG_RESULT($WANT_APACHE_20)
 
-if test "$WANT_APACHE_20" = yes ; then
-
-AC_ARG_WITH(apxs2,
-[  --with-apxs2[=FILE]        Build shared Apache module(s). FILE is the optional
-                          pathname to the Apache apxs tool; defaults to "apxs".],
-[
-    if test "$withval" = "yes"; then
-      for i in /usr/sbin /usr/local/apache2/bin /usr/local/apache/bin ; do
-        if test -f "$i/apxs"; then
-          APXS2="$i/apxs"
+if test "$WANT_APACHE_20" = "yes" ; then
+    AC_ARG_WITH(apxs2, 
+        AC_HELP_STRING([--with-apxs2=FILE], [Specifies where to find the Apache 2.0 apxs script.]),
+        [
+        AC_MSG_CHECKING(for user-specified Apache2 apxs name/location)
+        if test "$withval" != "no" ; then
+          if test "$withval" != "yes"; then
+            APXS2=$withval
+            AC_MSG_RESULT("$withval")
+          fi
         fi
-      done
-      if test -z "$APXS2"; then
-        APXS2=apxs
-      fi
-    else
-      APXS2="$withval"
-    fi
-],
-[
-    AC_PATH_PROG(APXS2, apxs, no)
-])
-
-AC_MSG_CHECKING([for dynamic Apache-2 module support (w/ or w/o APXS)])
-if test "$APXS2" = "no"; then
-
-    # --without-apxs2 means you want the modules,
-    #       but want to tell us how to build them
-    AC_MSG_RESULT(yes, but use environment, not apxs)
-    echo
-    echo "Did you set one or more of these?"
-    echo
-    echo "APXS2_CFLAGS APXS2_PREFIX APXS2_INCLUDE APXS2_LIBEXEC APXS2_SYSCONFDIR"
-    echo
-
-    AC_MSG_NOTICE([APXS2_CFLAGS is $APXS2_CFLAGS])
-
-    # try and find the Apache root
-    if test -z "$APXS2_PREFIX"; then
-        if test -d "/usr/local/apache"; then
-            APXS2_PREFIX="/usr/local/apache"
-        else
-            AC_MSG_ERROR([You MUST set APXS2_PREFIX so the right Apache-2 can be located!])
-        fi
-    elif test ! -d "$APXS2_PREFIX"; then
-        AC_MSG_ERROR([APXS2_PREFIX of $APXS2_PREFIX cannot be found])
-    fi
-    AC_MSG_NOTICE([APXS2_PREFIX is $APXS2_PREFIX])
-    
-
-    # other subfolders might be derived from APXS2_PREFIX
-    if test -z "$APXS2_INCLUDE"; then
-        if test -f "$APXS2_PREFIX/include/httpd.h"; then
-            APXS2_INCLUDE="$APXS2_PREFIX/include"
-        else
-            AC_MSG_ERROR([can't find Apache-2 include files beneath $APXS2_PREFIX])
+        ],
+        [
+        AC_PATH_PROG(APXS2, apxs2, no)
+        if test "$APXS2" = "no" ; then
+            AC_PATH_PROG(APXS2, apxs, no)
         fi
-    elif ! test -f "$APXS2_INCLUDE/httpd.h"; then
-        AC_MSG_ERROR([APXS2_INCLUDE of $APXS2_INCLUDE does not contain Apache-2 headers])
-    fi
-    AC_MSG_NOTICE([APXS2_INCLUDE is $APXS2_INCLUDE])
-
-    if test -z "$APXS2_LIBEXEC"; then
-        if test -d "$APXS2_PREFIX/libexec"; then
-            APXS2_LIBEXEC="$APXS2_PREFIX/libexec"
-        elif test -d "$APXS2_PREFIX/modules"; then
-            APXS2_LIBEXEC="$APXS2_PREFIX/modules"
-        else
-            AC_MSG_ERROR([can't find Apache-2 libexec/module directory beneath $APXS2_PREFIX])
+        if test "$APXS2" = "no" ; then
+          for i in /usr/sbin /usr/local/apache2/bin /usr/local/apache/bin ; do
+            if test "$APXS2" = "no" && test -f "$i/apxs2" ; then
+              APXS2="$i/apxs2"
+            fi
+          done
+          if test "$APXS2" = "no" ; then
+            for i in /usr/sbin /usr/local/apache2/bin /usr/local/apache/bin ; do
+              if test "$APXS2" = "no" && test -f "$i/apxs" ; then
+                APXS2="$i/apxs"
+              fi
+            done
+          fi
         fi
-    elif ! test -d "$APXS2_LIBEXEC"; then
-        AC_MSG_ERROR([APXS2_LIBEXEC of $APXS2_LIBEXEC does not exist])
-    fi
-    AC_MSG_NOTICE([APXS2_LIBEXEC is $APXS2_LIBEXEC])
+        ])
 
-    if test -z "$APXS2_SYSCONFDIR"; then
-        if test -d "$APXS2_PREFIX/conf"; then
-            APXS2_SYSCONFDIR="$APXS2_PREFIX/conf"
-        else
-            AC_MSG_ERROR([can't find Apache-2 conf directory beneath $APXS2_PREFIX])
-        fi
-    elif ! test -d "$APXS2_SYSCONFDIR"; then
-        AC_MSG_ERROR([APXS2_SYSCONFDIR of $APXS2_SYSCONFDIR does not exist])
+    AC_MSG_CHECKING([to see if Apache2 apxs was located])
+    if test ! -f "$APXS2" ; then
+        AC_MSG_RESULT(no)
+        AC_MSG_ERROR([Unable to locate Apache2 apxs script. An Apache development package may be missing from your server, or you may need to use the --with-apxs2 option.])
     fi
-    AC_MSG_NOTICE([APXS2_SYSCONFDIR is $APXS2_SYSCONFDIR])
-
-    WANT_APACHE_20="yes"
-
-elif test -n "$APXS2"; then
+    AC_MSG_RESULT($APXS2)
+    AC_SUBST(APXS2)
 
-       # APR settings
-       AC_PATH_PROG(APR_CONFIG,apr-config)
-       AC_ARG_WITH(apr,
-                   AC_HELP_STRING([--with-apr=PATH], [where APR is installed]),
-                   [APR_CONFIG="${with_apr}/bin/apr-config"])
+    # APR settings
+    AC_ARG_WITH(apr, 
+        AC_HELP_STRING([--with-apr=PATH], [where apr-config is installed]),
+        [
+        AC_MSG_CHECKING(for user-specified apr-config name/location)
+        if test "$withval" != "no" ; then
+            if test "$withval" != "yes"; then
+                APR_CONFIG=$withval
+                AC_MSG_RESULT("$withval")
+            fi
+        fi
+        ],
+        [
+        AC_PATH_PROG(APR_CONFIG, apr-config,,[`$APXS2 -q SBINDIR`]:[$PATH])
+        ])
        if test -f "${APR_CONFIG}"; then
-           APR_CFLAGS="`${APR_CONFIG} --cflags` `${APR_CONFIG} --cppflags` `${APR_CONFIG} --includes`"
-       fi
+        APR_CFLAGS="`${APR_CONFIG} --cflags` `${APR_CONFIG} --cppflags` `${APR_CONFIG} --includes`"
+    else
+        AC_MSG_ERROR([Unable to locate apr-config, may need --with-apr option.])
+    fi
 
     # extract settings we need from APXS2 -q
     APXS2_CC="`$APXS2 -q CC`"
-    APXS2_CFLAGS="`$APXS2 -q CFLAGS` `$APXS2 -q CFLAGS_SHLIB` $APR_CFLAGS"
+    APXS2_CFLAGS="`$APXS2 -q CPPFLAGS` `$APXS2 -q CFLAGS` $APR_CFLAGS"
     APXS2_INCLUDE="`$APXS2 -q INCLUDEDIR`"
-    APXS2_LIBEXEC="`$APXS2 -q LIBEXECDIR`"
-    APXS2_SYSCONFDIR="`$APXS2 -q SYSCONFDIR`"
+fi
 
-    AC_SUBST(APXS2)
-    AC_MSG_RESULT(found at $APXS2)
-
-    if test -z "`$APXS2 -q LD_SHLIB`" && test -z "`$APXS2 -q LIBEXECDIR`" \
-       || test "$APXS2_LIBEXEC" = "modules"; then
-           AC_MSG_ERROR(
-[Your APXS installation is broken and cannot be used.
-    Please see http://www.webdav.org/mod_dav/install.html#apxs for
-    more information.])
-    fi
+AC_SUBST(APXS2_CFLAGS)
+AC_SUBST(APXS2_INCLUDE)
 
-    WANT_APACHE_20="yes"
 
-else
-    # guess we're not doing Apache 2.0
-    AC_MSG_RESULT(no)
-    WANT_APACHE_20="no"
+# Apache 2.2 (mod_shib_22)
+#   --enable-apache-22
+#   --with-apxs22     (DSO build, the normal way, uses apxs to derive build flags)
+#      --with-apr1       (DSO build, APR development package installed separately)
+
+AC_ARG_ENABLE(apache-22,
+       AC_HELP_STRING([--enable-apache-22], [enable the Apache 2.2 module]),
+       [ if test "x$enableval" = "x" ; then
+              WANT_APACHE_22=yes
+         else
+             WANT_APACHE_22="$enableval"
+         fi
+       ],[ WANT_APACHE_22=no ])
+AC_MSG_CHECKING(whether to build Apache 2.2 module)
+if test "$WANT_APACHE_22" != yes && test "$WANT_APACHE_22" != no ; then
+   WANT_APACHE_22=yes
 fi
+AC_MSG_RESULT($WANT_APACHE_22)
+
+if test "$WANT_APACHE_22" = "yes" ; then
+    AC_ARG_WITH(apxs22, 
+        AC_HELP_STRING([--with-apxs22=FILE], [Specifies where to find the Apache 2.2 apxs script.]),
+        [
+        AC_MSG_CHECKING(for user-specified Apache2.2 apxs name/location)
+        if test "$withval" != "no" ; then
+          if test "$withval" != "yes"; then
+            APXS22=$withval
+            AC_MSG_RESULT("$withval")
+          fi
+        fi
+        ],
+        [
+        AC_PATH_PROG(APXS22, apxs2, no)
+        if test "$APXS22" = "no" ; then
+            AC_PATH_PROG(APXS22, apxs, no)
+        fi
+        if test "$APXS22" = "no" ; then
+          for i in /usr/sbin /usr/local/apache2/bin /usr/local/apache/bin ; do
+            if test "$APXS22" = "no" && test -f "$i/apxs2" ; then
+              APXS22="$i/apxs2"
+            fi
+          done
+          if test "$APXS22" = "no" ; then
+            for i in /usr/sbin /usr/local/apache2/bin /usr/local/apache/bin ; do
+              if test "$APXS22" = "no" && test -f "$i/apxs" ; then
+                APXS22="$i/apxs"
+              fi
+            done
+          fi
+        fi
+        ])
+
+    AC_MSG_CHECKING([to see if Apache2.2 apxs was located])
+    if test ! -f "$APXS22" ; then
+        AC_MSG_RESULT(no)
+        AC_MSG_ERROR([Unable to locate Apache2.2 apxs script. An Apache development package may be missing from your server, or you may need to use the --with-apxs22 option.])
+    fi
+    AC_MSG_RESULT($APXS22)
+    AC_SUBST(APXS22)
+
+    # APR1 settings
+    AC_ARG_WITH(apr1, 
+        AC_HELP_STRING([--with-apr1=PATH], [where apr-1-config is installed]),
+        [
+        AC_MSG_CHECKING(for user-specified apr-1-config name/location)
+        if test "$withval" != "no" ; then
+            if test "$withval" != "yes"; then
+                APR1_CONFIG=$withval
+                AC_MSG_RESULT("$withval")
+            fi
+        fi
+        ],
+        [
+        AC_PATH_PROG(APR1_CONFIG, apr-1-config,,[`$APXS22 -q SBINDIR`]:[$PATH])
+        ])
+       if test -f "${APR1_CONFIG}"; then
+        APR1_CFLAGS="`${APR1_CONFIG} --cflags` `${APR1_CONFIG} --cppflags` `${APR1_CONFIG} --includes`"
+    else
+        AC_MSG_ERROR([Unable to locate apr-1-config, may need --with-apr1 option.])
+    fi
+
+    # extract settings we need from APXS22 -q
+    APXS22_CC="`$APXS22 -q CC`"
+    APXS22_CFLAGS="`$APXS22 -q CPPFLAGS` `$APXS22 -q CFLAGS` $APR1_CFLAGS"
+    APXS22_INCLUDE="`$APXS22 -q INCLUDEDIR`"
 fi
 
-AC_SUBST(APXS2_CFLAGS)
-AC_SUBST(APXS2_INCLUDE)
-AC_SUBST(APXS2_LIBEXEC)
-AC_SUBST(APXS2_SYSCONFDIR)
-AM_CONDITIONAL(HAVE_APXS2,test -n "$APXS2")
+AC_SUBST(APXS22_CFLAGS)
+AC_SUBST(APXS22_INCLUDE)
 
 # always output the Makefile, even if you don't use it
 AC_CONFIG_FILES([apache/Makefile])
 AM_CONDITIONAL(BUILD_AP13,test "$WANT_APACHE_13" = "yes")
 AM_CONDITIONAL(BUILD_AP20,test "$WANT_APACHE_20" = "yes")
+AM_CONDITIONAL(BUILD_AP22,test "$WANT_APACHE_22" = "yes")
 
 # add the apache module to the list of wanted subdirs..
-if test "$WANT_APACHE_13" = "yes" || test "$WANT_APACHE_20" = "yes" ; then
+if test "$WANT_APACHE_13" = "yes" || test "$WANT_APACHE_20" = "yes" || test "$WANT_APACHE_22" = "yes" ; then
     WANT_SUBDIRS="$WANT_SUBDIRS apache"
 fi
 
@@ -640,10 +747,10 @@ if test "$build_mysql" = "yes" ; then
    AC_ARG_WITH(mysql,
        AC_HELP_STRING([--with-mysql=PATH], [directory where mysql is installed]),
            [if test "$with_mysql" = no ; then
-               AC_MSG_ERROR([Try running --disable-mysql instead.])
-             elif test "$with_mysql" != yes ; then
-               mysql_dir="$with_mysql/bin"
-             fi ])
+             AC_MSG_ERROR([Try running --disable-mysql instead.])
+         elif test "$with_mysql" != yes ; then
+             mysql_dir="$with_mysql/bin"
+         fi ])
 
    # Try to find the mysql_config program
    AC_PATH_PROG(MYSQL_CONFIG, mysql_config, no, $mysql_dir $PATH )
@@ -711,18 +818,18 @@ if test "$found_mysql" = yes ; then
       AC_MSG_CHECKING(if we can link againt mysql)
       AC_TRY_LINK(
         [#include <mysql.h>
-        #include <stdio.h>],
+         #include <stdio.h>],
         [mysql_server_init(0, NULL, NULL)],
-       [have_mysql_libs=yes],
-       [have_mysql_libs=no])
+        [have_mysql_libs=yes],
+        [have_mysql_libs=no])
       LIBS="$save_LIBS"
 
       if test "$have_mysql_libs" = no ; then
          if test "$mysql_enabled" = "yes" ; then
             AC_MSG_ERROR([unable to link with MySQL Embedded Server Library])
-        else
-           AC_MSG_RESULT(no.  skipping MySQL)
-        fi
+         else
+            AC_MSG_RESULT(no.  skipping MySQL)
+         fi
       fi
    fi
 
@@ -749,7 +856,7 @@ if test -n "$APXS_CC" && test "$APXS_CC" != "$CC" ; then
   echo "    Current compiler:      $CC"
   echo "   Apache's compiler:      $APXS_CC"
   echo ""
-  echo "This could cause some problems."
+  echo "This could cause problems."
   echo "=================================================================="
 fi
 
@@ -761,7 +868,7 @@ if test -n "$APXS2_CC" && test "$APXS2_CC" != "$CC" ; then
   echo "    Current compiler:      $CC"
   echo "   Apache's compiler:      $APXS2_CC"
   echo ""
-  echo "This could cause some problems."
+  echo "This could cause problems."
   echo "=================================================================="
 fi