Dear all, When i install cp2k-7.1 with intel compiler 2020 and intel MKL (and also i have installed libxsmm-1.16, libxc-4.3.4, libinit-v2.6.0-cp2k-lmax-6 and elpa-2020.05.001 by myself), i always get the following errors:`Updating archive /home/liuly/opt/cp2k-7.1/lib/Linux-x86-64-intelx/psmp/libcp2kfpga.a /home/liuly/opt/cp2k-7.1/src/sockets.c(73): error: incomplete type is not allowed struct addrinfo hints, *res; ^xiar: executing 'ar' /home/liuly/opt/cp2k-7.1/src/sockets.c(79): error: identifier "AI_PASSIVE" is undefined hints.ai_flags = AI_PASSIVE; ^/home/liuly/opt/cp2k-7.1/src/sockets.c(82): warning <a href="https://github.com/cp2k/cp2k/pull/266">#266</a>: function "getaddrinfo" declared implicitly ai_err = getaddrinfo(host, service, &hints, &res); ^/home/liuly/opt/cp2k-7.1/src/sockets.c(86): error: pointer to incomplete class type is not allowed sockfd = socket(res->ai_family, res->ai_socktype, res->ai_protocol); ^/home/liuly/opt/cp2k-7.1/src/sockets.c(86): error: pointer to incomplete class type is not allowed sockfd = socket(res->ai_family, res->ai_socktype, res->ai_protocol); ^/home/liuly/opt/cp2k-7.1/src/sockets.c(86): error: pointer to incomplete class type is not allowed sockfd = socket(res->ai_family, res->ai_socktype, res->ai_protocol); ^/home/liuly/opt/cp2k-7.1/src/sockets.c(90): error: pointer to incomplete class type is not allowed if (connect(sockfd, res->ai_addr, res->ai_addrlen) < 0) { perror("Error opening INET socket: wrong port or server unreachable"); exit(-1); } ^/home/liuly/opt/cp2k-7.1/src/sockets.c(90): error: pointer to incomplete class type is not allowed if (connect(sockfd, res->ai_addr, res->ai_addrlen) < 0) { perror("Error opening INET socket: wrong port or server unreachable"); exit(-1); } ^/home/liuly/opt/cp2k-7.1/src/sockets.c(91): warning <a href="https://github.com/cp2k/cp2k/pull/266">#266</a>: function "freeaddrinfo" declared implicitly freeaddrinfo(res); ^/home/liuly/opt/cp2k-7.1/src/sockets.c(163): error: incomplete type is not allowed struct timespec wt, rem; ^/home/liuly/opt/cp2k-7.1/src/sockets.c(163): error: incomplete type is not allowed struct timespec wt, rem; ^/home/liuly/opt/cp2k-7.1/src/sockets.c(165): warning <a href="https://github.com/cp2k/cp2k/pull/266">#266</a>: function "nanosleep" declared implicitly rn = nanosleep(&wt, &rem); ^ar: creating /home/liuly/opt/cp2k-7.1/lib/Linux-x86-64-intelx/psmp/libcp2kfpga.a /home/liuly/opt/cp2k-7.1/.inject.sh dbcsr_ -DNDEBUG mpiifort -c -align array64byte -complex-limited-range -free -fpp -threads -qopenmp-simd -qopt-matmul -fopenmp -O3 -xHost -qopt-zmm-usage=low -D__parallel -D__SCALAPACK -D__MPI_VERSION=3 -D__INTEL -D__LIBINT -D__MAX_CONTR=4 -D__LIBXC -D__ELPA -D__LIBXSMM=1 -D_OPENMP_SIMD -D__MKL -D__FFTW3 -I/home/liuly/opt/cp2k-7.1/obj/Linux-x86-64-intelx/psmp/exts/dbcsr -I/home/liuly/opt/libint/intel-skx/include -I/home/liuly/opt/libxc/intel-skx/include -I/home/liuly/opt/elpa/intel-skx-omp/include/elpa/elpa/ -I/home/liuly/opt/elpa/intel-skx-omp/include/elpa/elpa/../modules -I/home/liuly/opt/cp2k-7.1/lib/Linux-x86-64-intelx/psmp/libxsmm/include -I/opt/intel/2020u2/compilers_and_libraries_2020.2.254/linux/mkl/include -I/opt/intel/2020u2/compilers_and_libraries_2020.2.254/linux/mkl/include/fftw -diag-disable 8290,8291,10010,10212,10411,11060 -D__COMPILE_ARCH=""Linux-x86-64-intelx"" -D__COMPILE_DATE=""Sat Sep 26 13:52:11 CST 2020"" -D__COMPILE_HOST=""mu01"" -D__COMPILE_REVISION=""git:e635599"" -D__DATA_DIR=""/home/liuly/opt/cp2k-7.1/data"" -D__SHORT_FILE__=""pilaenv_hack.F"" -I'/home/liuly/opt/cp2k-7.1/src/' -I'/home/liuly/opt/cp2k-7.1/obj/Linux-x86-64-intelx/psmp/exts/dbcsr' pilaenv_hack.F90 compilation aborted for /home/liuly/opt/cp2k-7.1/src/sockets.c (code 2) make[3]: *** [sockets.o] Error 2 make[3]: *** Waiting for unfinished jobs.... xiar: executing 'ar' make[2]: *** [all] Error 2 make[1]: *** [psmp] Error 2 make: *** [all] Error 2 ` I have struggled for these errors many days, could anyone give me some suggestions to solve them? Thanks a lot !!!