I am installing freeswitch 1.6.19 with RPI-3,but getting some errors. Linux raspberrypi 4.9.41-v7+ #1023 SMP Tue Aug 8 16:00:15 BST 2017 armv7l GNU/Linux pi@raspberrypi:~/freeswitch-1.6.19 $ make -j3 touch /home/pi/freeswitch-1.6.19/src/include/switch.h CC libfreeswitch_spandsp_la-plc.lo make[1]: Entering directory '/home/pi/freeswitch-1.6.19/libs/srtp' /bin/bash ./libtool --tag=CC --mode=compile gcc -DHAVE_CONFIG_H -I. -I./crypto/include -I./src -Icrypto/include -I./include -I./crypto/include -I./src -Icrypto/include -I./include -I./crypto/include -g -O2 -Wall -std=c99 -pedantic -MT srtp.lo -MD -MP -MF .deps/srtp.Tpo -c -o srtp.lo `test -f 'srtp/srtp.c' || echo './'`srtp/srtp.c libtool: compile: gcc -DHAVE_CONFIG_H -I. -I./crypto/include -I./src -Icrypto/include -I./include -I./crypto/include -I./src -Icrypto/include -I./include -I./crypto/include -g -O2 -Wall -std=c99 -pedantic -MT srtp.lo -MD -MP -MF .deps/srtp.Tpo -c srtp/srtp.c -fPIC -DPIC -o srtp.o In file included from ./crypto/include/prng.h:17:0, from ./crypto/include/crypto_kernel.h:50, from ./include/srtp.h:53, from srtp/srtp.c:46: ./crypto/include/aes_icm_ossl.h:66:20: error: field ‘ctx’ has incomplete type EVP_CIPHER_CTX ctx; ^~~ In file included from srtp/srtp.c:50:0: ./crypto/include/aes_gcm_ossl.h:58:18: error: field ‘ctx’ has incomplete type EVP_CIPHER_CTX ctx; ^~~ config.status: creating Makefile config.status: creating include/apr.h config.status: creating build/apr_rules.mk Makefile:513: recipe for target 'srtp.lo' failed make[1]: *** [srtp.lo] Error 1 make[1]: Leaving directory '/home/pi/freeswitch-1.6.19/libs/srtp' Makefile:3719: recipe for target 'libs/srtp/libsrtp.la' failed make: *** [libs/srtp/libsrtp.la] Error 2 Please suggest me.