+dnl Check for Subversion library support
+save_LIBS=$LIBS
+save_CPPFLAGS=$CPPFLAGS
+LIBS=""
+CPPFLAGS="-I/usr/include/subversion-1 `apr-1-config --includes`"
+AC_CHECK_LIB(svn_client-1, svn_client_checkout3)
+AC_CHECK_HEADERS([svn_client.h])
+if test "x$ac_cv_header_svn_client_h" != "xyes"; then
+ echo "TerraSync will shell out for command line subversion"
+ svn_LIBS=""
+ svn_CPPFLAGS=""
+else
+ echo "TerraSync will use integrated subversion library"
+ AC_SEARCH_LIBS(svn_client_checkout, svn_client-1)
+ svn_LIBS=$LIBS
+ svn_CPPFLAGS=$CPPFLAGS
+ AC_SUBST(svn_LIBS)
+ AC_SUBST(svn_CPPFLAGS)
+fi
+LIBS=$save_LIBS
+CPPFLAGS=$save_CPPFLAGS