Updated package version.
[shibboleth/sp.git] / configure.ac
index 76a04e4..f51f107 100644 (file)
@@ -1,18 +1,43 @@
 AC_PREREQ([2.50])
-AC_INIT([shibboleth], [1.0.1], [mace-shib-users@internet2.edu], [shibboleth])
+AC_INIT([shibboleth], [1.3], [shibboleth-users@internet2.edu], [shibboleth])
 AM_CONFIG_HEADER(config.h)
-AM_INIT_AUTOMAKE(shibboleth, 1.0.1)
+AM_INIT_AUTOMAKE([shibboleth],[1.3])
 
 sinclude(acx_pthread.m4)
 sinclude(acx_rpctest.m4)
 
-AC_PROG_CC([gcc3 gcc cc])
-AC_PROG_CXX([g++3 g++ c++ CC])
+AC_ARG_ENABLE(debug,
+    AC_HELP_STRING(--enable-debug, [Have GCC compile with symbols (Default = no)
+]),
+    enable_debug=$enableval, enable_debug=no)
+
+if test "$enable_debug" = "yes" ; then
+    GCC_CFLAGS="$CFLAGS -g -D_DEBUG"
+    GCC_CXXFLAGS="$CXXFLAGS -g -D_DEBUG"
+else
+    GCC_CFLAGS="$CFLAGS -O2 -DNDEBUG"
+    GCC_CXXFLAGS="$CXXFLAGS -O2 -DNDEBUG"
+fi
+
+AC_PROG_CC([gcc gcc3 cc])
+AC_PROG_CXX([g++ g++3 c++ CC])
+
+if test "$GCC" = "yes" ; then
+    CFLAGS="$GCC_CFLAGS"
+    CXXFLAGS="$GCC_CXXFLAGS"
+fi
+
 AC_DISABLE_STATIC
 AC_PROG_LIBTOOL
 
 AC_LANG(C++)
 
+# C++ requirements
+AC_CXX_REQUIRE_STL
+AC_CXX_NAMESPACES
+
+AC_LANG(C)
+
 # Checks for typedefs, structures, and compiler characteristics.
 AC_C_CONST
 AC_TYPE_SIZE_T
@@ -20,14 +45,10 @@ AC_STRUCT_TM
 
 # Checks for library functions.
 AC_FUNC_STRFTIME
-AC_CHECK_FUNCS([strchr strdup strstr gmtime_r strcasecmp])
+AC_FUNC_STRERROR_R
+AC_CHECK_FUNCS([strchr strdup strstr gmtime_r strtok_r strcasecmp])
 AC_CHECK_HEADERS([dlfcn.h])
 
-# C++ requirements
-AC_CXX_REQUIRE_STL
-AC_CXX_NAMESPACES
-
-
 # old_LIBS="$LIBS"
 # AC_SEARCH_LIBS(xdr_uint64_t,nsl,,
 #      [CFLAGS="$CFLAGS -DNEED_XDR_LONGLONG"
@@ -45,8 +66,49 @@ else
     CXXFLAGS="$PTHREAD_CFLAGS $CXXFLAGS"
 fi
 
-# Test RPC now -- deal with it later
+# Test RPC now -- finish dealing with it later
+AC_ARG_ENABLE(native-rpc,
+       AC_HELP_STRING([--enable-native-rpc], [use the OS-supplied Sun RPC library, default is NO, except Linux]),
+       [ if test "x$enableval" = "x" ; then
+              NATIVE_RPC=yes
+         else
+             NATIVE_RPC="$enableval"
+         fi
+       ], [ NATIVE_RPC=no ])
 ACX_RPCTEST([rpctest="yes"],[rpctest="no"])
+AC_MSG_NOTICE([does the native Sun RPC library support svcfd_create...$rpctest])
+if test $NATIVE_RPC = "no"; then
+       case "${host}" in
+               *-*-linux*)
+                       if test $rpctest = "yes"; then
+                               AC_MSG_WARN([embedded Sun RPC library does not support Linux])
+                               NATIVE_RPC="yes"
+                       else
+                               AC_MSG_ERROR([embedded Sun RPC library won't work, but neither will native version])
+                       fi
+               ;;
+       esac
+fi
+if test $NATIVE_RPC = "yes" && test $rpctest = "no"; then
+       AC_MSG_WARN([native Sun RPC won't work, using internal version])
+       NATIVE_RPC = "no"
+fi
+if test $NATIVE_RPC = "yes"; then
+       AC_CHECK_DECLS([svcfd_create],,,[#include <rpc/rpc.h>])
+       AC_LANG_PUSH(C++)
+       AC_COMPILE_IFELSE(
+               AC_LANG_PROGRAM(
+                       [[#include <rpc/rpc.h>
+static SVCXPRT* xprt = NULL;]],
+               [[svc_destroy(xprt);]]),
+        AC_DEFINE(HAVE_WORKING_SVC_DESTROY,1,[Define if RPC SVC macros work on this platform]),)
+       AC_LANG_POP(C++)
+else
+       AC_CHECK_TYPES([struct rpcent],,,[#include <netdb.h>])
+       AC_CHECK_DECLS(sys_errlist)
+       AC_DEFINE(HAVE_DECL_SVCFD_CREATE,1,[ Define to 1 if you have the declaration of svcfd_create, and to 0 if you don't.])
+       AC_DEFINE(HAVE_WORKING_SVC_DESTROY,1,[Define if RPC SVC macros work on this platform])
+fi
 
 AC_ARG_WITH(dmalloc,
             AC_HELP_STRING([--with-dmalloc=PATH], [where dmalloc is installed]),
@@ -58,134 +120,159 @@ AC_ARG_WITH(dmalloc,
                         AC_MSG_ERROR([unable to find dmallocxx library]))
            ])
 
+# OpenSSL settings
+AC_PATH_PROG(PKG_CONFIG, pkg-config)
+if test "x$PKG_CONFIG" = x || test "x$PKG_CONFIG" = "xno" ; then
+    AC_ARG_WITH(openssl, 
+            AC_HELP_STRING([--with-openssl=PATH], [where openssl is installed]),
+            [if test x_$with_openssl != x_/usr; then
+           SSLLIBS="-L${with_openssl}/lib"
+           SSLFLAGS="-I${with_openssl}/include"
+            fi])
+    SSLLIBS="$SSLLIBS -lssl -lcrypto"
+else
+    SSLLIBS="`$PKG_CONFIG --libs openssl`"
+    SSLFLAGS="`$PKG_CONFIG --cflags openssl`"
+fi
+AC_MSG_CHECKING(for OpenSSL libraries)
+AC_MSG_RESULT($SSLLIBS)
+LIBS="$LIBS $SSLLIBS"
+AC_MSG_CHECKING(for OpenSSL cflags)
+AC_MSG_RESULT($SSLFLAGS)
+CPPFLAGS="$SSLFLAGS $CPPFLAGS"
+
+AC_CHECK_HEADER([openssl/ssl.h],,
+                AC_MSG_ERROR([unable to find openssl header files]))
+AC_MSG_CHECKING(for ERR_load_CRYPTO_string)
+AC_TRY_LINK_FUNC([ERR_load_CRYPTO_strings],,
+             AC_MSG_ERROR([unable to link with openssl libraries]))
+AC_MSG_RESULT(yes)
+AC_MSG_CHECKING(for SSL_library_init)
+AC_TRY_LINK_FUNC([SSL_library_init],, 
+             AC_MSG_ERROR([unable to link with openssl libraries]))
+AC_MSG_RESULT(yes)
+
+AC_LANG(C++)
+
+# log4cpp settings
+AC_PATH_PROG(LOG4CPP_CONFIG,log4cpp-config)
+AC_ARG_WITH(log4cpp,
+            AC_HELP_STRING([--with-log4cpp=PATH], [where log4cpp is installed]),
+            [LOG4CPP_CONFIG="${with_log4cpp}/bin/log4cpp-config"])
+if test -f "${LOG4CPP_CONFIG}"; then
+    LDFLAGS="`${LOG4CPP_CONFIG} --libs` $LDFLAGS"
+    CPPFLAGS="`${LOG4CPP_CONFIG} --cflags` $CPPFLAGS"
+else
+    AC_MSG_WARN([log4cpp-config not found, guessing at log4cpp build settings])
+    LIBS="-llog4cpp $LIBS"
+fi
+AC_CHECK_HEADER([log4cpp/Category.hh],,AC_MSG_ERROR([unable to find log4cpp header files]))
+AC_TRY_LINK(
+       [#include <log4cpp/Category.hh>],
+       [log4cpp::Category::getInstance("foo")],
+       [AC_DEFINE(HAVE_LIBLOG4CPP,1,[Define if log4cpp library was found])],
+       [AC_MSG_ERROR([unable to link with log4cpp])])
+
+# Xerces settings
 AC_ARG_WITH(xerces, 
             AC_HELP_STRING([--with-xerces=PATH], [where xerces-c is installed]),
             [if test x_$with_xerces != x_/usr; then
                 LDFLAGS="-L${with_xerces}/lib $LDFLAGS"
                 CPPFLAGS="-I${with_xerces}/include $CPPFLAGS"
             fi])
+LIBS="-lxerces-c $LIBS"
+AC_CHECK_HEADER([xercesc/dom/DOM.hpp],,
+                AC_MSG_ERROR([unable to find xerces header files]))
+AC_MSG_CHECKING([Xerces version])
+AC_PREPROC_IFELSE(
+        [AC_LANG_PROGRAM([#include <xercesc/util/XercesVersion.hpp>],
+[#if  _XERCES_VERSION != 20600 && _XERCES_VERSION >= 20300
+int i = 0;
+#else
+#error cannot use version = 2.6.0 or < 2.3.0
+#endif])],
+        [AC_MSG_RESULT(OK)],
+        [AC_MSG_FAILURE([Shibboleth requires a Xerces version > 2.3.0, but cannot use 2.6.0 -- a 2.6.1 patched release is available from us])])
+AC_TRY_LINK(
+        [#include <xercesc/util/PlatformUtils.hpp>],
+        [xercesc::XMLPlatformUtils::Initialize()],
+        [AC_DEFINE(HAVE_LIBXERCESC,1,[Define if Xerces-C library was found])],
+        [AC_MSG_ERROR([unable to link with Xerces])])
 
 
-AC_ARG_WITH(openssl, 
-            AC_HELP_STRING([--with-openssl=PATH], [where openssl is installed]),
-            [if test x_$with_openssl != x_/usr; then
-                LDFLAGS="-L${with_openssl}/lib $LDFLAGS"
-                CPPFLAGS="-I${with_openssl}/include $CPPFLAGS"
-            fi])
-
-AC_ARG_WITH(log4cpp, 
-            AC_HELP_STRING([--with-log4cpp=PATH], [where log4cpp is installed]),
-            [if test x_$with_log4cpp != x_/usr; then
-                LDFLAGS="-L${with_log4cpp}/lib $LDFLAGS"
-                CPPFLAGS="-I${with_log4cpp}/include $CPPFLAGS"
-            fi])
-
+# XML-Security settings
 AC_ARG_WITH(xmlsec,
             AC_HELP_STRING([--with-xmlsec=PATH], [where xmlsec is installed]),
             [if test x_$with_xmlsec != x_/usr; then
                 LDFLAGS="-L${with_xmlsec}/lib $LDFLAGS"
                 CPPFLAGS="-I${with_xmlsec}/include $CPPFLAGS"
             fi])
+LIBS="-lxml-security-c $LIBS"
+AC_CHECK_HEADER([xsec/utils/XSECPlatformUtils.hpp],,AC_MSG_ERROR([unable to find xsec header files]))
+AC_TRY_LINK(
+        [#include <xsec/utils/XSECPlatformUtils.hpp>],
+        [XSECPlatformUtils::Initialise()],
+        [AC_DEFINE(HAVE_LIBXSEC,1,[Define if XML-Sec library was found])],
+        [AC_MSG_ERROR([unable to link with XML-Sec])])
 
+# OpenSAML settings
 AC_ARG_WITH(saml,
             AC_HELP_STRING([--with-saml=PATH], [where saml is installed]),
             [if test x_$with_saml != x_/usr; then
                 LDFLAGS="-L${with_saml}/lib $LDFLAGS"
                 CPPFLAGS="-I${with_saml}/include $CPPFLAGS"
             fi])
-
-AC_CHECK_HEADER([xercesc/dom/DOM.hpp],,
-                AC_MSG_ERROR([unable to find xerces header files]))
-saved_LIBS="$LIBS"
-LIBS="-lxerces-c $LIBS"
-AC_TRY_LINK(
-       [#include <xercesc/util/PlatformUtils.hpp>],
-        [xercesc::XMLPlatformUtils::Initialize()],
-       [AC_DEFINE(HAVE_LIBXERCESC,1,[Define if Xerces-C library was found])],
-       [AC_MSG_ERROR([unable to link with Xerces])
-               LIBS="$saved_LIBS"
-       ])
-
-AC_CHECK_HEADER([openssl/ssl.h],,
-                AC_MSG_ERROR([unable to find openssl header files]))
-AC_CHECK_LIB([crypto], [ERR_load_CRYPTO_strings],,
-             AC_MSG_ERROR([unable to link with openssl libraries]))
-AC_CHECK_LIB([ssl], [SSL_library_init],, 
-             AC_MSG_ERROR([unable to link with openssl libraries]))
-
-AC_CHECK_HEADER([xsec/utils/XSECPlatformUtils.hpp],,
-                AC_MSG_ERROR([unable to find xsec header files]))
-saved_LIBS="$LIBS"
-LIBS="-lxml-security-c $LIBS"
-AC_TRY_LINK(
-        [#include <xsec/utils/XSECPlatformUtils.hpp>],
-        [XSECPlatformUtils::Initialise()],
-        [AC_DEFINE(HAVE_LIBXSEC,1,[Define if XML-Sec library was found])],
-        [AC_MSG_ERROR([unable to link with XML-Sec])
-                LIBS="$saved_LIBS"
-        ])
-
-AC_CHECK_HEADER([log4cpp/Category.hh],,
-                AC_MSG_ERROR([unable to find log4cpp header files]))
-
 AC_CHECK_HEADER([saml/saml.h],,
                 AC_MSG_ERROR([unable to find saml header files]))
-
-saved_LIBS="$LIBS"
-LIBS="-llog4cpp $LIBS"
-AC_TRY_LINK(
-       [#include <log4cpp/Category.hh>],
-       [log4cpp::Category::getInstance("foo")],
-       [AC_DEFINE(HAVE_LIBLOG4CPP,1,[Define if log4cpp library was found])],
-       [AC_MSG_ERROR([unable to link with log4cpp])
-               LIBS="$saved_LIBS"
-       ])
-
-saved_LIBS="$LIBS"
 LIBS="-lsaml $LIBS"
 AC_TRY_LINK(
-        [#include <saml/saml.h>],
-        [saml::SAMLConfig::getConfig()],
+       [#include <saml/saml.h>
+#include <saml/version.h>],
+       [#if _OPENSAML_VERSION >= 10000
+saml::SAMLConfig::getConfig();
+#else
+#error Need OpenSAML version 1.0 or higher
+#endif],
         [AC_DEFINE(HAVE_SAML,1,[Define if saml library was found])],
-        [AC_MSG_ERROR([unable to link with saml])
-                LIBS="$saved_LIBS"
-        ])
+        [AC_MSG_ERROR([unable to link with saml, or version too old])])
 
 # output the underlying makefiles
-WANT_SUBDIRS="doc shib schemas configs shib-target shar siterefresh test"
+WANT_SUBDIRS="doc shib schemas configs shib-target shar siterefresh test xmlproviders"
 AC_CONFIG_FILES([Makefile doc/Makefile shib/Makefile schemas/Makefile \
                 configs/Makefile oncrpc/Makefile oncrpc/rpc/Makefile \
                 shib-target/Makefile shar/Makefile siterefresh/Makefile \
-                test/Makefile])
+                test/Makefile xmlproviders/Makefile])
+
 
 # now deal with the rpc library, to see if we need to build our own
-if test $rpctest = "no"; then
+if test $NATIVE_RPC = "no"; then
     WANT_SUBDIRS="oncrpc $WANT_SUBDIRS"
+       AC_DEFINE(USE_OUR_ONCRPC,1,[Define if using embedded version of ONC RPC.])
 fi
-AM_CONDITIONAL(USE_OUR_ONCRPC,test "$rpctest" = "no")
+AM_CONDITIONAL(USE_OUR_ONCRPC,test "$NATIVE_RPC" = "no")
 
-# Much of this is taken from mod_dav.
-# The basic idea is to use configure options to control whether/which types
-# of web server modules get built. We assume there may eventually be multiple
-# types (Apache 1/2, iPlanet, others).
 
-# Apache 1.3 (mod_shire/mod_shibrm)
-#   --with-apache   (static build, no idea how to do this yet, so not supported)
-#   --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)
+# 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([--disable-apache-13], [disable the Apache 1.3 modules]))
-if test "x$enable_apache_13" = "x" ; then
-   enable_apache_13=yes
+       AC_HELP_STRING([--enable-apache-13], [enable the Apache 1.3 modules]),
+       [ if test "x$enableval" = "x" ; then
+              WANT_APACHE_13=yes
+         else
+             WANT_APACHE_13="$enableval"
+         fi
+       ], [ WANT_APACHE_13=no ])
+AC_MSG_CHECKING(whether to build Apache-1.3 support)
+if test "$WANT_APACHE_13" != yes && test "$WANT_APACHE_13" != no ; then
+   WANT_APACHE_13=yes
 fi
+AC_MSG_RESULT($WANT_APACHE_13)
 
-if test "$enable_apache_13" != yes ; then
-   AC_MSG_WARN(Building without Apache...)
-   WANT_APACHE=no
-else
+if test "$WANT_APACHE_13" = yes ; then
 
-AC_MSG_CHECKING([for dynamic Apache module support (w/ or w/o APXS)])
 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".],
@@ -202,8 +289,12 @@ AC_ARG_WITH(apxs,
     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,
@@ -266,7 +357,7 @@ if test "$APXS" = "no"; then
     fi
     AC_MSG_NOTICE([APXS_SYSCONFDIR is $APXS_SYSCONFDIR])
 
-    WANT_APACHE="yes"
+    WANT_APACHE_13="yes"
 
 elif test -n "$APXS"; then
 
@@ -287,67 +378,185 @@ elif test -n "$APXS"; then
     more information.])
     fi
 
-    WANT_APACHE="yes"
+    WANT_APACHE_13="yes"
 
 else
     # guess we're not doing Apache 1.3
     AC_MSG_RESULT(no)
-    WANT_APACHE="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")
 
-if test "$WANT_APACHE" = "yes"; then
-    AC_ARG_WITH(apreq,
-                AC_HELP_STRING([--with-apreq=PATH], [where libapreq is installed]),
-                [if test x_$with_apreq != x_/usr; then
-                    LDFLAGS="-L${with_apreq}/lib $LDFLAGS"
-                    CPPFLAGS="-I${with_apreq}/include $CPPFLAGS"
-                fi])
-
-    saved_CPPFLAGS="$CPPFLAGS"
-    CPPFLAGS="-I$APXS_INCLUDE $APXS_CFLAGS $CPPFLAGS"
-    AC_TRY_COMPILE([#include <libapreq/apache_request.h>],
-                   [int i=0],
-                   test_apreq="yes",test_apreq="no")
-    if test "$test_apreq" = "no"; then
-        CPPFLAGS="$CPPFLAGS -U_XOPEN_SOURCE"
-        APXS_CFLAGS="$APXS_CFLAGS -U_XOPEN_SOURCE"
-        AC_CHECK_HEADER([libapreq/apache_request.h],,
-            AC_MSG_ERROR([unable to find a usable libapreq header]))
+
+# 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)
+
+AC_ARG_ENABLE(apache-20,
+       AC_HELP_STRING([--enable-apache-20], [enable the Apache 2.0 modules]),
+       [ 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)
+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="$i/apxs"
+        fi
+      done
+      if test -z "$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])
+    
 
-dnl    saved_LIBS="$LIBS"
-dnl    LIBS="-lapreq $LIBS"
-dnl    AC_TRY_LINK(
-dnl        [#include <libapreq/apache_request.h>],
-dnl        [ApacheRequest_expires],
-dnl        [AC_DEFINE(HAVE_APREQ,1,[Define if apreq library was found])],
-dnl        [AC_MSG_ERROR([unable to link with apreq])
-dnl        ])
-dnl    LIBS="$saved_LIBS"
-    CPPFLAGS="$saved_CPPFLAGS"
-
-    AC_ARG_ENABLE([apxs-install],
-       AC_HELP_STRING([--enable-apxs-install],
-                       [use apxs to install the apache modules]),
-       APXS_INSTALL="yes", )
-
-
-    AC_SUBST(APXS_CFLAGS)
-    AC_SUBST(APXS_INCLUDE)
-    AC_SUBST(APXS_LIBEXEC)
-    AC_SUBST(APXS_SYSCONFDIR)
-
-    # output the Apache 1.3 makefiles
-    WANT_SUBDIRS="$WANT_SUBDIRS mod_shire mod_shibrm"
+    # 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 $APXS2_PREFIX])
+        fi
+    elif ! test -f "$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 $APXS2_PREFIX])
+        fi
+    elif ! test -d "$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])
+    fi
+    AC_MSG_NOTICE([APXS2_SYSCONFDIR is $APXS2_SYSCONFDIR])
+
+    WANT_APACHE_20="yes"
+
+elif test -n "$APXS2"; then
+
+       # 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="${with_apr}/bin/apr-config"])
+       if test -f "${APR_CONFIG}"; then
+           APR_CFLAGS="`${APR_CONFIG} --cflags` `${APR_CONFIG} --cppflags` `${APR_CONFIG} --includes`"
+       fi
+
+    # extract settings we need from APXS2 -q
+    APXS2_CC="`$APXS2 -q CC`"
+    APXS2_CFLAGS="`$APXS2 -q CFLAGS` `$APXS2 -q CFLAGS_SHLIB` $APR_CFLAGS"
+    APXS2_INCLUDE="`$APXS2 -q INCLUDEDIR`"
+    APXS2_LIBEXEC="`$APXS2 -q LIBEXECDIR`"
+    APXS2_SYSCONFDIR="`$APXS2 -q SYSCONFDIR`"
+
+    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
+
+    WANT_APACHE_20="yes"
+
+else
+    # guess we're not doing Apache 2.0
+    AC_MSG_RESULT(no)
+    WANT_APACHE_20="no"
+fi
+fi
+
+AC_SUBST(APXS2_CFLAGS)
+AC_SUBST(APXS2_INCLUDE)
+AC_SUBST(APXS2_LIBEXEC)
+AC_SUBST(APXS2_SYSCONFDIR)
+AM_CONDITIONAL(HAVE_APXS2,test -n "$APXS2")
+
+# always output the Makefile, even if you don't use it
+AC_CONFIG_FILES([apache/Makefile])
+AM_CONDITIONAL(BUILD_AP13,test "$WANT_APACHE_13" = "yes")
+AM_CONDITIONAL(BUILD_AP20,test "$WANT_APACHE_20" = "yes")
+
+# add the apache module to the list of wanted subdirs..
+if test "$WANT_APACHE_13" = "yes" || test "$WANT_APACHE_20" = "yes" ; then
+    WANT_SUBDIRS="$WANT_SUBDIRS apache"
 fi
-# always output the Makefile, even if we don't use it
-AC_CONFIG_FILES([mod_shire/Makefile mod_shibrm/Makefile])
 
-AM_CONDITIONAL(DO_APXS_INSTALL,test -n "$APXS_INSTALL")
 
 #
 # Implement the checks of the MySQL Credential Cache
@@ -458,14 +667,15 @@ if test "$found_mysql" = yes ; then
       LIBS="$LIBS $MYSQL_LIBS"
       AC_MSG_CHECKING(if we can link againt mysql)
       AC_TRY_LINK(
-        [#include <mysql.h>],
+        [#include <mysql.h>
+        #include <stdio.h>],
         [mysql_server_init(0, NULL, NULL)],
        [have_mysql_libs=yes],
        [have_mysql_libs=no])
       LIBS="$save_LIBS"
 
       if test "$have_mysql_libs" = no ; then
-         if "$mysql_enabled" = "yes" ; 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)
@@ -490,7 +700,7 @@ AC_SUBST(WANT_SUBDIRS)
 
 if test -n "$APXS_CC" && test "$APXS_CC" != "$CC" ; then
   echo "=================================================================="
-  echo "WARNING: You have chosen to compile Apache modules with a different"
+  echo "WARNING: You have chosen to compile Apache-1.3 modules with a different"
   echo "         compiler than the one used to compile Apache."
   echo ""
   echo "    Current compiler:      $CC"
@@ -500,5 +710,17 @@ if test -n "$APXS_CC" && test "$APXS_CC" != "$CC" ; then
   echo "=================================================================="
 fi
 
+if test -n "$APXS2_CC" && test "$APXS2_CC" != "$CC" ; then
+  echo "=================================================================="
+  echo "WARNING: You have chosen to compile Apache-2 modules with a different"
+  echo "         compiler than the one used to compile Apache."
+  echo ""
+  echo "    Current compiler:      $CC"
+  echo "   Apache's compiler:      $APXS2_CC"
+  echo ""
+  echo "This could cause some problems."
+  echo "=================================================================="
+fi
+
 AC_OUTPUT