fix nettle, gnutls to use latest API version, fix eth_raw interface with errno==EAGAIN

cmake_targets/tools/build_helper

@@ -172,57 +172,6 @@ compilations() {
 # External packages installers
 ############################################
 
-install_nettle_from_source() {
-    nettle_install_log=$OPENAIR_DIR/cmake_targets/log/nettle_install_log.txt
-    echo_info "\nInstalling Nettle. The log file for nettle installation is here: $nettle_install_log "
-    (
-    cd /tmp
-    echo "Downloading nettle archive"
-    $SUDO rm -rf /tmp/nettle-2.5.tar.gz* /tmp/nettle-2.5
-    wget https://ftp.gnu.org/gnu/nettle/nettle-2.5.tar.gz
-    if [ $? -ne 0 ]; then
-      wget ftp://ftp.lysator.liu.se/pub/security/lsh/nettle-2.5.tar.gz
-    fi
-    if [ ! -f nettle-2.5.tar.gz ]; then
-      echo_error "Could not download nettle source files"
-      cd -
-      return
-    fi
-    tar -xzf nettle-2.5.tar.gz
-    cd nettle-2.5/
-    ./configure --disable-openssl --enable-shared --prefix=/usr 
-    echo "Compiling nettle"
-    make -j`nproc`
-    make check 
-    $SUDO make install 
-    ) >& $nettle_install_log
-}
-
-install_gnutls_from_source(){
-    gnutls_install_log=$OPENAIR_DIR/cmake_targets/log/gnutls_install_log.txt
-    echo_info "\nInstalling Gnutls. The log file for Gnutls installation is here: $gnutls_install_log "
-    (
-    cd /tmp 
-    echo "Downloading gnutls archive"
-    $SUDO rm -rf /tmp/gnutls-3.1.23.tar.xz* /tmp/gnutls-3.1.23
-    wget http://mirrors.dotsrc.org/gcrypt/gnutls/v3.1/gnutls-3.1.23.tar.xz || \
-      wget ftp://ftp.gnutls.org/gcrypt/gnutls/v3.1/gnutls-3.1.23.tar.xz
-    if [ ! -f gnutls-3.1.23.tar.xz ]; then
-      echo_error "Could not download gnutls source files"
-      cd -
-      return
-    fi
-    tar -xJf gnutls-3.1.23.tar.xz
-    cd gnutls-3.1.23/
-    ./configure --prefix=/usr
-    echo "Compiling gnutls"
-    make -j`nproc`
-    $SUDO make install 
-    )>& $gnutls_install_log
-}
-
-
-
 check_install_usrp_uhd_driver(){
         #first we remove old installation
         $SUDO apt-get remove -y uhd || true
@@ -384,17 +333,7 @@ check_install_oai_software() {
 	wget
 
     $SUDO update-alternatives --set liblapack.so /usr/lib/atlas-base/atlas/liblapack.so
-    
-    # First we remove gnutls/nettle installation and then install from sources
-    v=$(lsb_release -ris | tr -d '\n')
-    if [ "$v" == Ubuntu16.04 ] ; then
         $SUDO apt-get install libgnutls-dev nettle-dev nettle-bin
-    else 
-      $SUDO apt-get remove -y libgnutls-dev nettle-dev nettle-bin
-      install_nettle_from_source
-      install_gnutls_from_source
-    fi
-
     install_asn1c_from_source
 }