configure: WARNING: unrecognized options: --disable-nls
configure: loading site script /builder/shared-workdir/build/sdk/include/site/arm
checking build system type... x86_64-pc-linux-gnu
checking host system type... arm-openwrt-linux-gnu
checking for a BSD-compatible install... /builder/shared-workdir/build/sdk/staging_dir/host/bin/install -c
checking whether build environment is sane... yes
checking for arm-openwrt-linux-strip... arm-openwrt-linux-muslgnueabi-strip
checking for a race-free mkdir -p... /bin/mkdir -p
checking for gawk... gawk
checking whether make sets $(MAKE)... yes
checking whether make supports nested variables... yes
checking for arm-openwrt-linux-gcc... arm-openwrt-linux-muslgnueabi-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... yes
checking for suffix of object files... o
checking whether the compiler supports GNU C... yes
checking whether arm-openwrt-linux-muslgnueabi-gcc accepts -g... yes
checking for arm-openwrt-linux-muslgnueabi-gcc option to enable C11 features... none needed
checking whether arm-openwrt-linux-muslgnueabi-gcc understands -c and -o together... yes
checking whether make supports the include directive... yes (GNU style)
checking dependency style of arm-openwrt-linux-muslgnueabi-gcc... none
checking how to run the C preprocessor... arm-openwrt-linux-muslgnueabi-gcc -E
checking for grep that handles long lines and -e... /builder/shared-workdir/build/sdk/staging_dir/host/bin/grep
checking for egrep... /builder/shared-workdir/build/sdk/staging_dir/host/bin/grep -E
checking for icc in use... no
checking for clang in use... no
checking for arm-openwrt-linux-muslgnueabi-gcc options needed to detect all undeclared functions... none needed
checking for stdio.h... yes
checking for stdlib.h... yes
checking for string.h... yes
checking for inttypes.h... yes
checking for stdint.h... yes
checking for strings.h... yes
checking for sys/stat.h... yes
checking for sys/types.h... yes
checking for unistd.h... yes
checking whether __SUNPRO_C is declared... no
checking for arm-openwrt-linux-muslgnueabi-gcc option to accept ISO C99... none needed
checking for sasl/sasl.h... no
checking size of void *... (cached) 4
checking for library containing clock_gettime... none required
checking for library containing socket... none required
checking for library containing gethostbyname... none required
checking for libevent directory... configure: error: libevent is required.  You can get it from https://www.monkey.org/~provos/libevent/

      If it's already installed, specify its path using --with-libevent=/dir/

make[3]: *** [Makefile:68: /builder/shared-workdir/build/sdk/build_dir/target-arm_cortex-a7+neon-vfpv4_musl_eabi/memcached-1.6.17/.configured_68b329da9893e34099c7d8ad5cb9c940] Error 1
time: package/feeds/packages/memcached/compile#2.37#0.95#6.41