Issue trying to build FFmpeg for ARM with librtmp support - arm

Question

I am trying to compile librtmp so I can build FFmpeg with RTMP support for ARM processor.
I already have the toolchain, and solo build of FFmpeg was also successful, and testing from inside the ARM processor was success as well.
My understanding:
- Ffmpeg
-- Librtmp
--- Openssl
--- zlib
This hierarchy is required to build FFmepg.
So far I have built openssl for ARM, and zlib for ARM, and, I can see it is located in right ARM output folder.
Prerequisites:
export LD_LIBRARY_PATH=/opt/toolchain_gnueabi-4.4.0_ARMv5TE/usr/lib/
export CCPREFIX="/opt/toolchain_gnueabi-4.4.0_ARMv5TE/usr/bin/arm-unknown-linux-uclibcgnueabi-"
export CFLAGS="-I/opt/toolchain_gnueabi-4.4.0_ARMv5TE/usr/include"
export LDFLAGS="-L/opt/toolchain_gnueabi-4.4.0_ARMv5TE/usr/lib/"
1- Steps to build zlib:
export CC=arm-linux-gcc
./configure --prefix=/opt/toolchain_gnueabi-4.4.0_ARMv5TE/usr
make
make install
2- Steps to build openssl:
export cross=arm-linux-
./Configure dist --prefix=/opt/toolchain_gnueabi-4.4.0_ARMv5TE/usr
make CC="${cross}gcc" AR="${cross}ar r" RANLIB="${cross}ranlib"
make install
3- Steps to build librtmp:
make CROSS_COMPILE=arm-linux- INC=-I/opt/toolchain_gnueabi-4.4.0_ARMv5TE/usr/include LIB=-L/opt/toolchain_gnueabi-4.4.0_ARMv5TE/usr/lib
above 1,2 steps are successful, with 3rd, I get this:
make CROSS_COMPILE=arm-linux- INC=-I/opt/toolchain_gnueabi-4.4.0_ARMv5TE/usr/include LIB=-L/opt/toolchain_gnueabi-4.4.0_ARMv5TE/usr/lib
make[1]: Entering directory '/home/user/Downloads/ip_code/rtmpdump/librtmp'
arm-linux-gcc -shared -Wl,-soname,librtmp.so.1 -o librtmp.so.1 rtmp.o log.o amf.o hashswf.o parseurl.o -lssl -lcrypto -lz
/opt/toolchain_gnueabi-4.4.0_ARMv5TE/usr/bin/../lib/gcc/arm-unknown-linux-uclibcgnueabi/4.4.0/../../../../arm-unknown-linux-uclibcgnueabi/bin/ld: cannot find -lssl
/opt/toolchain_gnueabi-4.4.0_ARMv5TE/usr/bin/../lib/gcc/arm-unknown-linux-uclibcgnueabi/4.4.0/../../../../arm-unknown-linux-uclibcgnueabi/bin/ld: cannot find -lcrypto
/opt/toolchain_gnueabi-4.4.0_ARMv5TE/usr/bin/../lib/gcc/arm-unknown-linux-uclibcgnueabi/4.4.0/../../../../arm-unknown-linux-uclibcgnueabi/bin/ld: cannot find -lz
collect2: ld returned 1 exit status
Makefile:92: recipe for target 'librtmp.so.1' failed
make[1]: *** [librtmp.so.1] Error 1
make[1]: Leaving directory '/home/user/Downloads/ip_code/rtmpdump/librtmp'
Makefile:76: recipe for target 'librtmp/librtmp.a' failed
make: *** [librtmp/librtmp.a] Error 2
but in the output folder I can see the right files are there:
[user#localhost rtmpdump]$ cd /opt/toolchain_gnueabi-4.4.0_ARMv5TE/usr/lib
[user#localhost lib]$ ls
bin libavcodec.a libgmp.so.10.0.2 libz.so
certs libavdevice.a libiberty.a libz.so.1
engines libavfilter.a libmpfr.la libz.so.1.2.11
gcc libavformat.a libmpfr.so man
include libavutil.a libmpfr.so.4 misc
ldscripts libcrypto.a libmpfr.so.4.0.1 openssl.cnf
lib libfakeroot-0.so libpostproc.a pkgconfig
libaacplus.a libfakeroot.la libssl.a private
libaacplus.la libfakeroot.so libswresample.a share
libaacplus.so libgmp.la libswscale.a
libaacplus.so.2 libgmp.so libx264.a
libaacplus.so.2.0.2 libgmp.so.10 libz.a
[user#localhost lib]$
Any idea how to compile?
Thanks

Answer 1

Just for info: the rtmpdump is apparently a requirement for some other OS... I compiled FFmpeg without rtmpdump/librtmp yesterday, and in the 'enabled protocols' at time of ./configure , I could see RTMP/RTMPS etc. as well...
Very surprised, I ran the compiled FFmpeg on the targetted ARM device, and it runs without any issue: I guess support was already there inside ffmpeg (for ARM), while I was wrestling with rtmpdump.
Enabled protocols:
async httpproxy rtmpte
cache https rtmpts
concat icecast rtp
crypto md5 srtp
data mmsh subfile
ffrtmpcrypt mmst tcp
ffrtmphttp pipe tee
file prompeg tls_openssl
ftp rtmp udp
gopher rtmpe udplite
hls rtmps unix
http rtmpt
Issue resolved!