When I compile source code, I face this problem.
How can I solve this problem ?
time: target/linux/prereq#0.42#0.06#0.48
make[1] world
make[2] target/compile
make[3] -C target/linux compile
make[2] buildinfo
make[3] diffconfig buildversion feedsversion
make[2] package/cleanup
make[2] package/compile
make[3] -C package/libs/libjson-c host-compile
make[3] -C package/libs/libubox host-compile
make[3] -C package/system/opkg host-compile
make[3] -C package/libs/toolchain compile
make[3] -C package/libs/libnl-tiny compile
make[3] -C package/libs/libjson-c compile
make[3] -C package/utils/lua compile
make[3] -C package/libs/libubox compile
make[3] -C package/system/ubus compile
make[3] -C package/system/uci compile
make[3] -C package/network/config/netifd compile
make[3] -C package/firmware/linux-firmware compile
make[3] -C package/firmware/prism54-firmware compile
make[3] -C package/kernel/linux compile
make[3] -C package/system/ubox compile
make[3] -C package/libs/ncurses host-compile
make[3] -C package/libs/zlib compile
make[3] -C package/libs/ncurses compile
make[3] -C package/utils/util-linux compile
make[3] -C package/utils/mtd-utils compile
make[3] -C package/system/fstools compile
make[3] -C package/system/fwtool host-compile
make[3] -C package/system/fwtool compile
make[3] -C package/system/usign host-compile
make[3] -C package/system/ucert host-compile
make[3] -C package/utils/jsonfilter compile
make[3] -C package/system/openwrt-keyring compile
make[3] -C package/system/usign compile
make[3] -C package/base-files compile
make[3] -C feeds/luci/modules/luci-base host-compile
make[3] -C package/network/utils/iptables compile
make[3] -C package/network/config/firewall compile
make[3] -C package/utils/lua host-compile
make[3] -C feeds/luci/contrib/package/csstidy host-compile
make[3] -C feeds/luci/applications/luci-app-firewall compile
make[3] -C package/libs/mbedtls compile
make[3] -C package/libs/openssl compile
make[3] -C package/libs/gettext compile
make[3] -C package/libs/libiconv compile
make[3] -C package/libs/libtool compile
make[3] -C package/libs/wolfssl compile
make[3] -C package/libs/ustream-ssl compile
make[3] -C package/libs/ustream-ssl compile
make[3] -C package/libs/uclient compile
make[3] -C package/system/opkg compile
make[3] -C feeds/luci/applications/luci-app-opkg compile
make[3] -C feeds/luci/libs/luci-lib-ip compile
make[3] -C feeds/luci/libs/luci-lib-jsonc compile
make[3] -C feeds/luci/libs/luci-lib-nixio compile
make[3] -C feeds/luci/contrib/package/lucihttp compile
make[3] -C feeds/luci/libs/luci-lib-base compile
make[3] -C package/network/utils/iwinfo compile
make[3] -C package/system/rpcd compile
make[3] -C feeds/luci/libs/rpcd-mod-luci compile
make[3] -C feeds/packages/net/cgi-io compile
make[3] -C feeds/luci/modules/luci-base compile
make[3] -C feeds/luci/modules/luci-mod-network compile
make[3] -C feeds/luci/modules/luci-mod-status compile
make[3] -C feeds/luci/modules/luci-mod-system compile
make[3] -C feeds/luci/modules/luci-mod-admin-full compile
make[3] -C feeds/luci/protocols/luci-proto-ipv6 compile
make[3] -C feeds/luci/protocols/luci-proto-ppp compile
make[3] -C feeds/luci/themes/luci-theme-bootstrap compile
make[3] -C feeds/luci/libs/rpcd-mod-rrdns compile
make[3] -C feeds/packages/libs/libxml2 compile
make[3] -C package/libs/pcre compile
make[3] -C feeds/packages/net/nginx-util compile
make[3] -C feeds/packages/libs/expat compile
make[3] -C feeds/packages/utils/dbus compile
make[3] -C feeds/packages/utils/attr compile
make[3] -C feeds/packages/libs/libffi compile
make[3] -C package/libs/gettext-full host-compile
make[3] -C package/libs/gettext-full compile
make[3] -C package/libs/libiconv host-compile
make[3] -C feeds/packages/libs/glib2 compile
make[3] -C feeds/packages/libs/libical compile
make[3] -C package/libs/readline compile
make[3] -C feeds/packages/utils/bluez compile
make[3] -C feeds/packages/libs/gdbm compile
make[3] -C feeds/packages/lang/python/python-pip-conf compile
make[3] -C feeds/packages/libs/expat host-compile
make[3] -C feeds/packages/libs/libffi host-compile
make[3] -C package/utils/bzip2 host-compile
make[3] -C feeds/packages/lang/python/python3 host-compile
make[3] -C feeds/packages/libs/sqlite3 compile
make[3] -C feeds/packages/utils/xz compile
make[3] -C package/utils/bzip2 compile
make[3] -C package/system/ca-certificates compile
make[3] -C feeds/packages/lang/python/python3 compile
make[3] -C package/libs/libcap compile
make[3] -C feeds/packages/net/uwsgi compile
make[3] -C feeds/packages/net/nginx compile
make[3] -C package/utils/bsdiff compile
make[3] -C package/utils/bsdiff host-compile
make[3] -C package/firmware/lantiq/dsl-vrx200-firmware-xdsl compile
make[3] -C package/firmware/wireless-regdb compile
make[3] -C package/kernel/gpio-button-hotplug compile
make[3] -C package/kernel/lantiq/ltq-adsl-mei compile
make[3] -C package/kernel/lantiq/ltq-ifxos compile
make[3] -C package/kernel/lantiq/ltq-vdsl-mei compile
make[3] -C package/network/utils/linux-atm compile
make[3] -C package/kernel/lantiq/ltq-atm compile
make[3] -C package/kernel/lantiq/ltq-ptm compile
make[3] -C package/kernel/lantiq/ltq-vdsl compile
make[3] -C package/kernel/lantiq/ltq-vdsl-fw compile
make[3] -C package/firmware/b43legacy-firmware compile
make[3] -C package/network/services/hostapd compile
make[3] -C package/network/utils/iw compile
make[3] -C package/kernel/mac80211 compile
make[3] -C package/network/utils/ltq-dsl-base compile
make[3] -C package/network/config/ltq-vdsl-app compile
make[3] -C package/network/ipv6/odhcp6c compile
make[3] -C package/network/services/dnsmasq compile
make[3] -C package/network/services/dropbear compile
make[3] -C package/network/services/odhcpd compile
make[3] -C package/libs/libpcap compile
make[3] -C package/network/utils/resolveip compile
make[3] -C package/network/services/ppp compile
make[3] -C package/network/services/uhttpd compile
make[3] -C package/system/mtd compile
make[3] -C package/libs/libsepol compile
make[3] -C package/libs/musl-fts compile
make[3] -C package/libs/libselinux compile
make[3] -C package/system/procd compile
make[3] -C package/system/urandom-seed compile
make[3] -C package/system/urngd compile
make[3] -C package/utils/busybox compile
make[3] -C package/utils/px5g-wolfssl compile
make[2] package/install
make[2] target/install
make[3] -C target/linux install
ERROR: target/linux failed to build.
make -r world: build failed. Please re-run make with -j1 V=s or V=sc for a higher verbosity level to see what's going on
make: *** [/home/........./openwrt/include/toplevel.mk:230: world] Error 1