Hi RTMPDump still seems to build OK with old version of polarssl.(eg polarssl-1.1.4) But it won't build for me (using ARCH Linux) with latest version polarssl-1.3.1. Method used. ############################################## # cd ~/; mkdir build; cd build # curl -L polarssl.org/code/releases/polarssl-1.3.1-gpl.tgz | tar -xz; cd polarssl-* # make; make install DESTDIR=$HOME/build # cd .. # git clone --depth 1 git://git.ffmpeg.org/rtmpdump; cd rtmpdump # make install CRYPTO=POLARSSL SHARED= XLDFLAGS=-L$HOME/build/lib INC=-I$HOME/build/include prefix=$HOME/build # ############################################## Result. $ make install CRYPTO=POLARSSL SHARED= XLDFLAGS=-L$HOME/build/lib INC=-I$HOME/build/include prefix=$HOME/build gcc -Wall  -I/home/user/build/include -DRTMPDUMP_VERSION=\"v2.4\"   -O2   -c -o rtmpdump.o rtmpdump.c make[1]: Entering directory '/home/user/build/rtmpdump/librtmp' gcc -Wall  -I/home/user/build/include -DRTMPDUMP_VERSION=\"v2.4\" -DUSE_POLARSSL  -O2    -c -o rtmp.o rtmp.c In file included from rtmp.c:32:0: rtmp_sys.h:82:2: error: unknown type name ‘x509_cert’   x509_cert cert;   ^ In file included from rtmp.c:150:0: handshake.h:28:27: fatal error: polarssl/sha2.h: No such file or directory  #include <polarssl/sha2.h>                            ^ compilation terminated. <builtin>: recipe for target 'rtmp.o' failed make[1]: *** [rtmp.o] Error 1 make[1]: Leaving directory '/home/user/build/rtmpdump/librtmp' Makefile:76: recipe for target 'librtmp/librtmp.a' failed make: *** [librtmp/librtmp.a] Error 2 ##############################################