Hi Jaap and everybody, I've been trying to install a new instance of domjudge and I'm getting another error that I'm posting below.

ubuntu@ip-172-31-28-85:~/domjudge-4.0.5$ ./configure --prefix=$HOME/domjudge checking whether configure should try to set CFLAGS... yes checking whether configure should try to set CXXFLAGS... yes checking whether configure should try to set LDFLAGS... yes checking for gcc... gcc checking whether the C compiler works... yes checking for C compiler default output file name... a.out checking for suffix of executables... checking whether we are cross compiling... no checking for suffix of object files... o checking whether we are using the GNU C compiler... yes checking whether gcc accepts -g... yes checking for gcc option to accept ISO C89... none needed checking whether C compiler accepts -Wall... yes checking whether C compiler accepts -fstack-protector... yes checking whether C compiler accepts -fPIE... yes checking whether C compiler accepts -D_FORTIFY_SOURCE=2... yes checking whether the linker accepts -fPIE... yes checking whether the linker accepts -pie... yes checking whether the linker accepts -Wl,-z,relro... yes checking whether the linker accepts -Wl,-z,now... yes checking domjudge-user... ubuntu (default: current user) checking webserver-group... www-data (detected) checking runuser... domjudge-run (default) checking for cgroup_init in -lcgroup... no checking for g++... g++ checking whether we are using the GNU C++ compiler... yes checking whether g++ accepts -g... yes checking for gcc... (cached) gcc checking whether we are using the GNU C compiler... (cached) yes checking whether gcc accepts -g... (cached) yes checking for gcc option to accept ISO C89... (cached) none needed checking how to run the C++ preprocessor... g++ -E checking how to run the C preprocessor... gcc -E checking for a BSD-compatible install... /usr/bin/install -c checking whether ln -s works... yes checking whether make sets $(MAKE)... yes checking for a thread-safe mkdir -p... /bin/mkdir -p checking for magic_open in -lmagic... yes checking for a sed that does not truncate output... /bin/sed checking for gawk... gawk checking for curl-config... /usr/bin/curl-config checking for curl (7.35.0) >= 7.9.7... yes checking for grep that handles long lines and -e... /bin/grep checking for egrep... /bin/grep -E checking for ANSI C header files... yes checking for sys/types.h... yes checking for sys/stat.h... yes checking for stdlib.h... yes checking for string.h... yes checking for memory.h... yes checking for strings.h... yes checking for inttypes.h... yes checking for stdint.h... yes checking for unistd.h... yes checking curl/curl.h usability... yes checking curl/curl.h presence... yes checking for curl/curl.h... yes checking jsoncpp/json/json.h usability... yes checking jsoncpp/json/json.h presence... yes checking for jsoncpp/json/json.h... yes checking build system type... x86_64-unknown-linux-gnu checking host system type... x86_64-unknown-linux-gnu checking for boostlib >= 1.33.1... configure: We could not detect the boost libraries (version 1.33 or higher). If you have a staged boost library (still not installed) please specify $BOOST_ROOT in your environment and do not give a PATH to --with-boost option. If you are sure you have boost installed, then check your version number looking in <boost/version.hpp>. See http://randspringer.de/boost for more documentation. configure: error: Boost not found (required for checktestdata) ubuntu@ip-172-31-28-85:~/domjudge-4.0.5$

my question is, why I didn't get that error with my previous installation?. my current ubuntu version is:

ubuntu@ip-172-31-28-85:~/domjudge-4.0.5$ lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 14.04.2 LTS Release: 14.04 Codename: trusty ubuntu@ip-172-31-28-85:~/domjudge-4.0.5$

and the domjudge version is 4.0.5 the same version I've used the last time I've succesfully installed on other ubuntu pc. hope you can explain it a little if that boost is required, I've installed the compilers as described ni the documentation.