Check for pkg-config and use that for openssl libraries, if it's available
[shibboleth/sp.git] / configure.ac
index 2df7900..fea2833 100644 (file)
@@ -1,9 +1,7 @@
-dnl $Id$ 
-
 AC_PREREQ([2.50])
-AC_INIT([shibboleth], [0.1], [mace-shib-users@internet2.edu], [shibboleth])
+AC_INIT([shibboleth], [1.1], [mace-shib-users@internet2.edu], [shibboleth])
 AM_CONFIG_HEADER(config.h)
-AM_INIT_AUTOMAKE(shibboleth, 0.1)
+AM_INIT_AUTOMAKE(shibboleth, 1.1)
 
 sinclude(acx_pthread.m4)
 sinclude(acx_rpctest.m4)
@@ -22,7 +20,7 @@ AC_STRUCT_TM
 
 # Checks for library functions.
 AC_FUNC_STRFTIME
-AC_CHECK_FUNCS([strchr strdup strstr gmtime_r])
+AC_CHECK_FUNCS([strchr strdup strstr gmtime_r strtok_r strcasecmp])
 AC_CHECK_HEADERS([dlfcn.h])
 
 # C++ requirements
@@ -30,11 +28,11 @@ AC_CXX_REQUIRE_STL
 AC_CXX_NAMESPACES
 
 
-old_LIBS="$LIBS"
-AC_SEARCH_LIBS(xdr_uint64_t,nsl,,
-       [CFLAGS="$CFLAGS -DNEED_XDR_LONGLONG"
-        CXXFLAGS="$CXXFLAGS -DNEED_XDR_LONGLONG"])
-LIBS="$old_LIBS"
+old_LIBS="$LIBS"
+AC_SEARCH_LIBS(xdr_uint64_t,nsl,,
+#      [CFLAGS="$CFLAGS -DNEED_XDR_LONGLONG"
+#       CXXFLAGS="$CXXFLAGS -DNEED_XDR_LONGLONG"])
+LIBS="$old_LIBS"
 
 # checks for pthreads
 ACX_PTHREAD([enable_threads="pthread"],[enable_threads="no"])
@@ -50,6 +48,20 @@ fi
 # Test RPC now -- deal with it later
 ACX_RPCTEST([rpctest="yes"],[rpctest="no"])
 
+# Determine whether to use TCP for the shar socket
+AC_ARG_ENABLE([tcp],
+    AC_HELP_STRING([--enable-tcp], [enable the SHAR to use a TCP socket on Unix]),
+    [tcp_enabled=$enableval], [tcp_enabled=default])
+
+if test "x$tcp_enabled" = "x" ; then
+   tcp_enabled=yes
+fi
+
+if test "$tcp_enabled" = "yes" ; then
+    CFLAGS="$CFLAGS -DWANT_TCP_SHAR"
+    CXXFLAGS="$CXXFLAGS -DWANT_TCP_SHAR"
+fi
+
 AC_ARG_WITH(dmalloc,
             AC_HELP_STRING([--with-dmalloc=PATH], [where dmalloc is installed]),
             [if test x_$with_dmalloc != x_/usr; then
@@ -68,12 +80,24 @@ AC_ARG_WITH(xerces,
             fi])
 
 
-AC_ARG_WITH(openssl, 
+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_$with_openssl != x_/usr; then
-                LDFLAGS="-L${with_openssl}/lib $LDFLAGS"
-                CPPFLAGS="-I${with_openssl}/include $CPPFLAGS"
+           SSLLIBS="-L${with_openssl}/lib"
+           SSLFLAGS="-I${with_openssl}/include"
             fi])
+else
+    SSLLIBS="`$PKG_CONFIG --libs openssl`"
+    SSLFLAGS="`$PKG_CONFIG --cflags openssl`"
+fi
+AC_MSG_CHECKING(for OpenSSL libraries)
+AC_MSG_RESULT($SSLLIBS)
+LDFLAGS="$SSLLIBS $LDFLAGS"
+AC_MSG_CHECKING(for OpenSSL cflags)
+AC_MSG_RESULT($SSLFLAGS)
+CPPFLAGS="$SSLFLAGS $CPPFLAGS"
 
 AC_ARG_WITH(log4cpp, 
             AC_HELP_STRING([--with-log4cpp=PATH], [where log4cpp is installed]),
@@ -84,9 +108,9 @@ AC_ARG_WITH(log4cpp,
 
 AC_ARG_WITH(xmlsec,
             AC_HELP_STRING([--with-xmlsec=PATH], [where xmlsec is installed]),
-            [if test -f "${with_xmlsec}/bin/xmlsec-config"; then
-                LDFLAGS="`${with_xmlsec}/bin/xmlsec-config --libs` $LDFLAGS"
-                CPPFLAGS="`${with_xmlsec}/bin/xmlsec-config --cflags` $CPPFLAGS"
+            [if test x_$with_xmlsec != x_/usr; then
+                LDFLAGS="-L${with_xmlsec}/lib $LDFLAGS"
+                CPPFLAGS="-I${with_xmlsec}/include $CPPFLAGS"
             fi])
 
 AC_ARG_WITH(saml,
@@ -102,7 +126,7 @@ saved_LIBS="$LIBS"
 LIBS="-lxerces-c $LIBS"
 AC_TRY_LINK(
        [#include <xercesc/util/PlatformUtils.hpp>],
-        [XMLPlatformUtils::Initialize()],
+        [xercesc::XMLPlatformUtils::Initialize()],
        [AC_DEFINE(HAVE_LIBXERCESC,1,[Define if Xerces-C library was found])],
        [AC_MSG_ERROR([unable to link with Xerces])
                LIBS="$saved_LIBS"
@@ -110,20 +134,31 @@ AC_TRY_LINK(
 
 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_CHECKING(for ERR_load_CRYPTO_string)
+AC_TRY_LINK_FUNC([ERR_load_CRYPTO_strings],,
              AC_MSG_ERROR([unable to link with openssl libraries]))
-AC_CHECK_LIB([ssl], [SSL_library_init],, 
+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_CHECK_HEADER([libxml/parser.h],,
-                AC_MSG_ERROR([unable to find libxml2 header files]))
-AC_CHECK_LIB([xml2], [xmlInitParser],echo "foo" > /dev/null,
-             AC_MSG_ERROR([unable to link with libxml2]))
+#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([xmlsec/xmlsec.h],,
-                AC_MSG_ERROR([unable to find xmlsec header files]))
-AC_CHECK_LIB([xmlsec], [xmlSecInit],echo "foo" > /dev/null,
-             AC_MSG_ERROR([unable to link with xmlsec]))
+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]))
@@ -152,14 +187,16 @@ AC_TRY_LINK(
         ])
 
 # output the underlying makefiles
-WANT_SUBDIRS="shib schemas configs eduPerson shib-target shar test"
-AC_CONFIG_FILES([Makefile shib/Makefile schemas/Makefile eduPerson/Makefile \
+WANT_SUBDIRS="doc shib schemas configs shib-target shar siterefresh test"
+AC_CONFIG_FILES([Makefile doc/Makefile shib/Makefile schemas/Makefile \
                 configs/Makefile oncrpc/Makefile oncrpc/rpc/Makefile \
-                shib-target/Makefile shar/Makefile test/Makefile])
+                shib-target/Makefile shar/Makefile siterefresh/Makefile \
+                test/Makefile])
 
 # now deal with the rpc library, to see if we need to build our own
 if test $rpctest = "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")
 
@@ -169,11 +206,26 @@ AM_CONDITIONAL(USE_OUR_ONCRPC,test "$rpctest" = "no")
 # 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)
+#   --with-apache-13 (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)
+
+AC_ARG_ENABLE(apache-13,
+       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($WANT_APACHE_13)
+
+if test "$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".],
@@ -190,8 +242,12 @@ 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,
@@ -254,7 +310,7 @@ 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
 
@@ -275,17 +331,16 @@ 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
 
-AM_CONDITIONAL(HAVE_APXS,test -n "$APXS")
-
-if test "$WANT_APACHE" = "yes"; then
+if test "$WANT_APACHE_13" = "yes"; then
     AC_ARG_WITH(apreq,
                 AC_HELP_STRING([--with-apreq=PATH], [where libapreq is installed]),
                 [if test x_$with_apreq != x_/usr; then
@@ -295,8 +350,15 @@ if test "$WANT_APACHE" = "yes"; then
 
     saved_CPPFLAGS="$CPPFLAGS"
     CPPFLAGS="-I$APXS_INCLUDE $APXS_CFLAGS $CPPFLAGS"
-    AC_CHECK_HEADER([libapreq/apache_request.h],,
-                AC_MSG_ERROR([unable to find apreq header files]))
+    AC_TRY_COMPILE([#include <libapreq/apache_request.h>],
+                   [int i=0],
+                   test_apreq="yes",test_apreq="no")
+    if test "$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]))
+    fi
 
 dnl    saved_LIBS="$LIBS"
 dnl    LIBS="-lapreq $LIBS"
@@ -322,16 +384,344 @@ dnl    LIBS="$saved_LIBS"
 
     # output the Apache 1.3 makefiles
     WANT_SUBDIRS="$WANT_SUBDIRS mod_shire mod_shibrm"
-    AC_CONFIG_FILES([mod_shire/Makefile mod_shibrm/Makefile])
 fi
-
+# always output the Makefile, even if we don't use it
+AC_CONFIG_FILES([mod_shire/Makefile mod_shibrm/Makefile])
+AM_CONDITIONAL(HAVE_APXS,test -n "$APXS")
 AM_CONDITIONAL(DO_APXS_INSTALL,test -n "$APXS_INSTALL")
 
+
+# Apache 2.0 (mod_shib in apache-2.0)
+#   --with-apache-20   (static build, no idea how to do this yet, so not supported)
+#   --with-apxs2       (DSO build, the normal way, uses apxs to derive build flags)
+#   --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 "$withval" = "yes"; then
+      for i in /usr/sbin /usr/local/apache/bin ; do
+        if test -f "$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 $APXS2_PREFIX])
+    
+
+    # other subfolders might be derived from APXS2_PREFIX
+    if test -z "$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
+
+    # extract settings we need from APXS2 -q
+    APXS2_CC="`$APXS2 -q CC`"
+    APXS2_CFLAGS="`$APXS2 -q CFLAGS` `$APXS2 -q CFLAGS_SHLIB`"
+    APXS2_INCLUDE="`$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
+
+if test "$WANT_APACHE_20" = "yes"; then
+    AC_ARG_WITH(apreq2,
+                AC_HELP_STRING([--with-apreq2=PATH], [where http-apreq-2 is installed]),
+                [if test x_$with_apreq2 != x_/usr; then
+                    LDFLAGS="-L${with_apreq2}/lib $LDFLAGS"
+                    CPPFLAGS="-I${with_apreq2}/include $CPPFLAGS"
+                fi])
+
+    saved_CPPFLAGS="$CPPFLAGS"
+    CPPFLAGS="-I$APXS2_INCLUDE $APXS2_CFLAGS $CPPFLAGS"
+    AC_TRY_COMPILE([#include <apreq.h>],
+                   [int i=0],
+                   test_apreq2="yes",test_apreq2="no")
+    if test "$test_apreq2" = "no"; then
+        CPPFLAGS="$CPPFLAGS -U_XOPEN_SOURCE"
+        APXS2_CFLAGS="$APXS2_CFLAGS -U_XOPEN_SOURCE"
+        AC_CHECK_HEADER([apreq.h],,
+            AC_MSG_ERROR([unable to find a usable libapreq2 header]))
+    fi
+
+dnl    saved_LIBS="$LIBS"
+dnl    LIBS="-lapreq $LIBS"
+dnl    AC_TRY_LINK(
+dnl        [#include <apreq.h>],
+dnl        [apreq_param],
+dnl        [AC_DEFINE(HAVE_APREQ2,1,[Define if apreq2 library was found])],
+dnl        [AC_MSG_ERROR([unable to link with apreq2])
+dnl        ])
+dnl    LIBS="$saved_LIBS"
+    CPPFLAGS="$saved_CPPFLAGS"
+
+    AC_ARG_ENABLE([apxs2-install],
+       AC_HELP_STRING([--enable-apxs2-install],
+                       [use apxs to install the apache-2 modules]),
+       APXS2_INSTALL="yes", )
+
+
+    AC_SUBST(APXS2_CFLAGS)
+    AC_SUBST(APXS2_INCLUDE)
+    AC_SUBST(APXS2_LIBEXEC)
+    AC_SUBST(APXS2_SYSCONFDIR)
+
+    # output the Apache 2.0 makefiles
+    WANT_SUBDIRS="$WANT_SUBDIRS apache-2.0"
+fi
+# always output the Makefile, even if we don't use it
+AC_CONFIG_FILES([apache-2.0/Makefile])
+AM_CONDITIONAL(HAVE_APXS2,test -n "$APXS2")
+AM_CONDITIONAL(DO_APXS2_INSTALL,test -n "$APXS2_INSTALL")
+
+
+#
+# Implement the checks of the MySQL Credential Cache
+#
+# 1) Assume the user wants MySQL; if it's not found then just continue without
+# 2) If the user specifically requested Mysql, look for it and ERROR if not found
+# 3) If the user specifically requested no-mysql, don't build it.
+#
+
+AC_CONFIG_FILES([shib-mysql-ccache/Makefile])
+
+# determine whether we should enable the mysql ccache
+AC_ARG_ENABLE([mysql],
+       AC_HELP_STRING([--disable-mysql], [disable the MySQL Credential Cache]),
+       [mysql_enabled=$enableval], [mysql_enabled=default])
+
+if test "x$mysql_enabled" = "x" ; then
+   mysql_enabled=yes
+fi
+
+# Are we trying to build MySQL?
+AC_MSG_CHECKING(whether to build the MySQL ccache)
+if test "$mysql_enabled" = "yes" ; then
+   build_mysql=yes
+   AC_MSG_RESULT(yes)
+elif test "$mysql_enabled" = "default" ; then
+   build_mysql=yes
+   AC_MSG_RESULT([yes, if it can be found])
+else
+   build_mysql=no
+   AC_MSG_RESULT(no)
+fi
+
+# If we're trying to build MySQL, try to find the mysql_config program,
+# verify we've got mysql >= 4, and make sure we can build with mysqld
+if test "$build_mysql" = "yes" ; then
+   mysql_dir=""
+   AC_ARG_WITH(mysql,
+       AC_HELP_STRING([--with-mysql=PATH], [directory where mysql is installed]),
+           [if test "$with_mysql" = no ; then
+               AC_MSG_ERROR([Try running --disable-mysql instead.])
+             elif test "$with_mysql" != yes ; then
+               mysql_dir="$with_mysql/bin"
+             fi ])
+
+   # Try to find the mysql_config program
+   AC_PATH_PROG(MYSQL_CONFIG, mysql_config, no, $mysql_dir $PATH )
+
+   if test "$MYSQL_CONFIG" = no ; then
+      if test "$mysql_enabled" = "yes" ; then
+        AC_MSG_ERROR(Cannot find mysql_config)
+      else
+        AC_MSG_WARN(MySQL not found.  skipping.)
+      fi
+   fi
+fi
+
+# if we found mysql_config then build_mysql is 'yes'
+if test "$MYSQL_CONFIG" != no ; then
+   AC_MSG_CHECKING(for mysql version >= 4)
+   mysql_version=`$MYSQL_CONFIG --version`
+   mysql_major_version=`echo $mysql_version | awk -F. '{print $1}'`
+   mysql_version_ok=yes
+   if test $mysql_major_version -lt 4 ; then
+     mysql_version_ok=no
+     if test "$mysql_enabled" = "yes" ; then
+       AC_MSG_ERROR(You need MySQL version >= 4, found $mysql_version)
+     fi
+     AC_MSG_RESULT(no.. skipping MySQL)
+   else
+     AC_MSG_RESULT(yes)
+   fi
+fi
+
+# if mysql_version_ok is 'yes', then we've made it this far.. ;)
+if test "$mysql_version_ok" = "yes" ; then
+   AC_MSG_CHECKING(for embedded-MySQL libraries)
+   MYSQL_LIBS=`$MYSQL_CONFIG --libmysqld-libs`
+   if test $? != 0 ; then
+      found_mysql=no
+      if test "$mysql_enabled" = "yes" ; then
+        AC_MSG_ERROR(Could not find the MySQL Embedded-server libraries.)
+      else
+        AC_MSG_RESULT(no.. skipping MySQL)
+      fi
+   else
+      found_mysql=yes
+      AC_MSG_RESULT(yes)
+   fi
+fi
+
+# if found_mysql=yes then test that we can actually build mysql
+if test "$found_mysql" = yes ; then
+   MYSQL_CFLAGS=`$MYSQL_CONFIG --cflags`
+   MYSQL_CFLAGS=`eval echo $MYSQL_CFLAGS`
+   MYSQL_LIBS=`eval echo $MYSQL_LIBS`
+
+   save_CPPFLAGS="$CPPFLAGS"
+   CPPFLAGS="$CPPFLAGS $MYSQL_CFLAGS"
+
+   AC_CHECK_HEADER([mysql.h], [have_mysql_h=yes], [have_mysql_h=no])
+   if test "$have_mysql_h" = no -a "$mysql_enabled" = "yes" ; then
+     AC_MSG_ERROR(unable to find MySQL header files)
+   fi
+
+   if test "$have_mysql_h" = yes ; then
+      save_LIBS="$LIBS"
+      LIBS="$LIBS $MYSQL_LIBS"
+      AC_MSG_CHECKING(if we can link againt mysql)
+      AC_TRY_LINK(
+        [#include <mysql.h>
+        #include <stdio.h>],
+        [mysql_server_init(0, NULL, NULL)],
+       [have_mysql_libs=yes],
+       [have_mysql_libs=no])
+      LIBS="$save_LIBS"
+
+      if test "$have_mysql_libs" = no ; then
+         if test "$mysql_enabled" = "yes" ; then
+            AC_MSG_ERROR([unable to link with MySQL Embedded Server Library])
+        else
+           AC_MSG_RESULT(no.  skipping MySQL)
+        fi
+      fi
+   fi
+
+   CPPFLAGS="$save_CPPFLAGS"
+fi
+
+# if have_mysql_libs=yes then go ahead with building MySQL
+if test "$have_mysql_libs" = yes ; then
+   # this AC_MSG_RESULT is from above!
+   AC_MSG_RESULT(yes)
+   WANT_SUBDIRS="$WANT_SUBDIRS shib-mysql-ccache"
+   AC_SUBST(MYSQL_CFLAGS)
+   AC_SUBST(MYSQL_LIBS)
+fi
+
+
 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:      $CC"
@@ -341,5 +731,17 @@ if test -n "$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