Build errors for membrane_rtc_engine deps when cross-compiling

I’m trying to put ex_nvr on Nerves. Saw someone else try that a while back. I think I get everything but the WebRTC parts of Membrane compiling.

I was building using this branch (to add media libraries): GitHub - lawik/nerves_system_rpi4 at membrane-media · GitHub

This is the example app that doesn’t compile unless I comment out the rtc deps: GitHub - lawik/nerves_membrane_test · GitHub

Since it’s a modified nerves_system_rpi4 the compile is fairly long. I’ll try to get a pre-compiled system in place for download but don’t have it now.

I get this, seems unhappy with the library but it does exist.

/home/lawik/projects/nerves_systems/o/rpi4/host/opt/ext-toolchain/bin/../lib/gcc/aarch64-nerves-linux-gnu/13.2.0/../../../../aarch64-nerves-linux-gnu/bin/ld: skipping incompatible /home/lawik/projects/nerves_systems/o/rpi4/host/lib/erlang/usr/lib/libei.a when searching for -lei
/home/lawik/projects/nerves_systems/o/rpi4/host/opt/ext-toolchain/bin/../lib/gcc/aarch64-nerves-linux-gnu/13.2.0/../../../../aarch64-nerves-linux-gnu/bin/ld: cannot find -lei: No such file or directory
collect2: error: ld returned 1 exit status
could not compile dependency :ex_dtls, "mix compile" failed. Errors may have been logged above. You can recompile this dependency with "mix deps.compile ex_dtls --force", update it with "mix deps.update ex_dtls" or clean it with "mix deps.clean ex_dtls"
==> foobar2
** (Mix) Bundlex: Failed to build the native part of package ex_dtls. Errors may have been logged above.
Make sure that all required packages are properly installed in your system.
Requirements and installation guide may be found in the readme of package ex_dtls.

Returned code: 1
Build script:

(mkdir -p "/home/lawik/projects/foobar2/_build/rpi4_dev/lib/ex_dtls/priv/bundlex/nif/native_obj") && \
(/home/lawik/projects/nerves_systems/o/rpi4/host/bin/aarch64-nerves-linux-gnu-gcc -mabi=lp64 -fstack-protector-strong -mcpu=cortex-a72 -fPIE -pie -Wl,-z,now -Wl,-z,relro -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64  -pipe -O2 --sysroot /home/lawik/projects/nerves_systems/o/rpi4/staging -fPIC -Wall -Wextra -c -O2 -g -std=c11 -DBUNDLEX_NIF -I/home/lawik/projects/nerves_systems/o/rpi4/staging/usr/include -o "/home/lawik/projects/foobar2/_build/rpi4_dev/lib/ex_dtls/priv/bundlex/nif/native_obj/native.c_5410E45890ABC219767E0EC3BED1CF28E3D95872.o" -I"/home/lawik/projects/foobar2/deps/bunch_native/c_src/bunch" -I"/home/lawik/projects/foobar2/deps/bunch_native/c_src/bunch/nif" -I"/home/lawik/projects/foobar2/deps/shmex/c_src/shmex" -I"/home/lawik/projects/foobar2/deps/shmex/c_src/shmex/nif" -I"/home/lawik/projects/foobar2/deps/unifex/c_src/unifex/nif" -I"/home/lawik/projects/foobar2/deps/bunch_native/c_src/bunch" -I"/home/lawik/projects/foobar2/deps/bunch_native/c_src/bunch/nif" -I"/home/lawik/projects/foobar2/deps/shmex/c_src/shmex" -I"/home/lawik/projects/foobar2/deps/shmex/c_src/shmex/nif" -I"/home/lawik/projects/foobar2/deps/unifex/c_src/unifex/nif" -I"/home/lawik/projects/nerves_systems/o/rpi4/host/lib/erlang/usr/include" -I"/home/lawik/projects/foobar2/deps/ex_dtls/c_src" "/home/lawik/projects/foobar2/deps/ex_dtls/c_src/ex_dtls/_generated/nif/native.c"
) && \
(/home/lawik/projects/nerves_systems/o/rpi4/host/bin/aarch64-nerves-linux-gnu-gcc -mabi=lp64 -fstack-protector-strong -mcpu=cortex-a72 -fPIE -pie -Wl,-z,now -Wl,-z,relro -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64  -pipe -O2 --sysroot /home/lawik/projects/nerves_systems/o/rpi4/staging -fPIC -Wall -Wextra -c -O2 -g -std=c11 -DBUNDLEX_NIF -I/home/lawik/projects/nerves_systems/o/rpi4/staging/usr/include -o "/home/lawik/projects/foobar2/_build/rpi4_dev/lib/ex_dtls/priv/bundlex/nif/native_obj/native.c_EAA168AA822A21524D976C585CEB985228B6BF0A.o" -I"/home/lawik/projects/foobar2/deps/bunch_native/c_src/bunch" -I"/home/lawik/projects/foobar2/deps/bunch_native/c_src/bunch/nif" -I"/home/lawik/projects/foobar2/deps/shmex/c_src/shmex" -I"/home/lawik/projects/foobar2/deps/shmex/c_src/shmex/nif" -I"/home/lawik/projects/foobar2/deps/unifex/c_src/unifex/nif" -I"/home/lawik/projects/foobar2/deps/bunch_native/c_src/bunch" -I"/home/lawik/projects/foobar2/deps/bunch_native/c_src/bunch/nif" -I"/home/lawik/projects/foobar2/deps/shmex/c_src/shmex" -I"/home/lawik/projects/foobar2/deps/shmex/c_src/shmex/nif" -I"/home/lawik/projects/foobar2/deps/unifex/c_src/unifex/nif" -I"/home/lawik/projects/nerves_systems/o/rpi4/host/lib/erlang/usr/include" -I"/home/lawik/projects/foobar2/deps/ex_dtls/c_src" "/home/lawik/projects/foobar2/deps/ex_dtls/c_src/ex_dtls/native.c"
) && \
(/home/lawik/projects/nerves_systems/o/rpi4/host/bin/aarch64-nerves-linux-gnu-gcc -mabi=lp64 -fstack-protector-strong -mcpu=cortex-a72 -fPIE -pie -Wl,-z,now -Wl,-z,relro -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64  -pipe -O2 --sysroot /home/lawik/projects/nerves_systems/o/rpi4/staging -fPIC -Wall -Wextra -c -O2 -g -std=c11 -DBUNDLEX_NIF -I/home/lawik/projects/nerves_systems/o/rpi4/staging/usr/include -o "/home/lawik/projects/foobar2/_build/rpi4_dev/lib/ex_dtls/priv/bundlex/nif/native_obj/dtls.c_0C08BCA4DB9D85E7538ADA3E550A8E27DBE99D32.o" -I"/home/lawik/projects/foobar2/deps/bunch_native/c_src/bunch" -I"/home/lawik/projects/foobar2/deps/bunch_native/c_src/bunch/nif" -I"/home/lawik/projects/foobar2/deps/shmex/c_src/shmex" -I"/home/lawik/projects/foobar2/deps/shmex/c_src/shmex/nif" -I"/home/lawik/projects/foobar2/deps/unifex/c_src/unifex/nif" -I"/home/lawik/projects/foobar2/deps/bunch_native/c_src/bunch" -I"/home/lawik/projects/foobar2/deps/bunch_native/c_src/bunch/nif" -I"/home/lawik/projects/foobar2/deps/shmex/c_src/shmex" -I"/home/lawik/projects/foobar2/deps/shmex/c_src/shmex/nif" -I"/home/lawik/projects/foobar2/deps/unifex/c_src/unifex/nif" -I"/home/lawik/projects/nerves_systems/o/rpi4/host/lib/erlang/usr/include" -I"/home/lawik/projects/foobar2/deps/ex_dtls/c_src" "/home/lawik/projects/foobar2/deps/ex_dtls/c_src/ex_dtls/dtls.c"
) && \
(/home/lawik/projects/nerves_systems/o/rpi4/host/bin/aarch64-nerves-linux-gnu-gcc -mabi=lp64 -fstack-protector-strong -mcpu=cortex-a72 -fPIE -pie -Wl,-z,now -Wl,-z,relro -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64  -pipe -O2 --sysroot /home/lawik/projects/nerves_systems/o/rpi4/staging -fPIC -Wall -Wextra -c -O2 -g -std=c11 -DBUNDLEX_NIF -I/home/lawik/projects/nerves_systems/o/rpi4/staging/usr/include -o "/home/lawik/projects/foobar2/_build/rpi4_dev/lib/ex_dtls/priv/bundlex/nif/native_obj/dyn_buff.c_92302C7051765367C3E581FDA43F463A75950D80.o" -I"/home/lawik/projects/foobar2/deps/bunch_native/c_src/bunch" -I"/home/lawik/projects/foobar2/deps/bunch_native/c_src/bunch/nif" -I"/home/lawik/projects/foobar2/deps/shmex/c_src/shmex" -I"/home/lawik/projects/foobar2/deps/shmex/c_src/shmex/nif" -I"/home/lawik/projects/foobar2/deps/unifex/c_src/unifex/nif" -I"/home/lawik/projects/foobar2/deps/bunch_native/c_src/bunch" -I"/home/lawik/projects/foobar2/deps/bunch_native/c_src/bunch/nif" -I"/home/lawik/projects/foobar2/deps/shmex/c_src/shmex" -I"/home/lawik/projects/foobar2/deps/shmex/c_src/shmex/nif" -I"/home/lawik/projects/foobar2/deps/unifex/c_src/unifex/nif" -I"/home/lawik/projects/nerves_systems/o/rpi4/host/lib/erlang/usr/include" -I"/home/lawik/projects/foobar2/deps/ex_dtls/c_src" "/home/lawik/projects/foobar2/deps/ex_dtls/c_src/ex_dtls/dyn_buff.c"
) && \
(/home/lawik/projects/nerves_systems/o/rpi4/host/bin/aarch64-nerves-linux-gnu-gcc --sysroot=/home/lawik/projects/nerves_systems/o/rpi4/staging -rdynamic -shared -o "/home/lawik/projects/foobar2/_build/rpi4_dev/lib/ex_dtls/priv/bundlex/nif/native.so" -Wl,--disable-new-dtags,--whole-archive "/home/lawik/projects/foobar2/_build/rpi4_dev/lib/bunch_native/priv/bundlex/lib.a" "/home/lawik/projects/foobar2/_build/rpi4_dev/lib/shmex/priv/bundlex/lib.a" "/home/lawik/projects/foobar2/_build/rpi4_dev/lib/bunch_native/priv/bundlex/nif/bunch.a" "/home/lawik/projects/foobar2/_build/rpi4_dev/lib/shmex/priv/bundlex/nif/shmex.a" "/home/lawik/projects/foobar2/_build/rpi4_dev/lib/unifex/priv/bundlex/nif/unifex.a" -Wl,--no-whole-archive "/home/lawik/projects/foobar2/_build/rpi4_dev/lib/ex_dtls/priv/bundlex/nif/native_obj/native.c_5410E45890ABC219767E0EC3BED1CF28E3D95872.o" "/home/lawik/projects/foobar2/_build/rpi4_dev/lib/ex_dtls/priv/bundlex/nif/native_obj/native.c_EAA168AA822A21524D976C585CEB985228B6BF0A.o" "/home/lawik/projects/foobar2/_build/rpi4_dev/lib/ex_dtls/priv/bundlex/nif/native_obj/dtls.c_0C08BCA4DB9D85E7538ADA3E550A8E27DBE99D32.o" "/home/lawik/projects/foobar2/_build/rpi4_dev/lib/ex_dtls/priv/bundlex/nif/native_obj/dyn_buff.c_92302C7051765367C3E581FDA43F463A75950D80.o"  -lrt -lrt -lpthread -L/home/lawik/projects/nerves_systems/o/rpi4/staging/usr/lib -lssl -lcrypto
) && \
(mkdir -p "/home/lawik/projects/foobar2/_build/rpi4_dev/lib/ex_dtls/priv/bundlex/cnode/native_obj") && \
(/home/lawik/projects/nerves_systems/o/rpi4/host/bin/aarch64-nerves-linux-gnu-gcc -mabi=lp64 -fstack-protector-strong -mcpu=cortex-a72 -fPIE -pie -Wl,-z,now -Wl,-z,relro -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64  -pipe -O2 --sysroot /home/lawik/projects/nerves_systems/o/rpi4/staging -Wall -Wextra -c -O2 -g -std=c11 -DBUNDLEX_CNODE -I/home/lawik/projects/nerves_systems/o/rpi4/staging/usr/include -o "/home/lawik/projects/foobar2/_build/rpi4_dev/lib/ex_dtls/priv/bundlex/cnode/native_obj/native.c_E32A9D3FEA256B1A8DAED2737033FDB583FAE1B0.o" -I"/home/lawik/projects/foobar2/deps/unifex/c_src/unifex/cnode" -I"/home/lawik/projects/foobar2/deps/unifex/c_src/unifex/cnode" -I"/home/lawik/projects/nerves_systems/o/rpi4/host/lib/erlang/usr/include" -I"/home/lawik/projects/foobar2/deps/ex_dtls/c_src" "/home/lawik/projects/foobar2/deps/ex_dtls/c_src/ex_dtls/_generated/cnode/native.c"
) && \
(/home/lawik/projects/nerves_systems/o/rpi4/host/bin/aarch64-nerves-linux-gnu-gcc -mabi=lp64 -fstack-protector-strong -mcpu=cortex-a72 -fPIE -pie -Wl,-z,now -Wl,-z,relro -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64  -pipe -O2 --sysroot /home/lawik/projects/nerves_systems/o/rpi4/staging -Wall -Wextra -c -O2 -g -std=c11 -DBUNDLEX_CNODE -I/home/lawik/projects/nerves_systems/o/rpi4/staging/usr/include -o "/home/lawik/projects/foobar2/_build/rpi4_dev/lib/ex_dtls/priv/bundlex/cnode/native_obj/native.c_EAA168AA822A21524D976C585CEB985228B6BF0A.o" -I"/home/lawik/projects/foobar2/deps/unifex/c_src/unifex/cnode" -I"/home/lawik/projects/foobar2/deps/unifex/c_src/unifex/cnode" -I"/home/lawik/projects/nerves_systems/o/rpi4/host/lib/erlang/usr/include" -I"/home/lawik/projects/foobar2/deps/ex_dtls/c_src" "/home/lawik/projects/foobar2/deps/ex_dtls/c_src/ex_dtls/native.c"
) && \
(/home/lawik/projects/nerves_systems/o/rpi4/host/bin/aarch64-nerves-linux-gnu-gcc -mabi=lp64 -fstack-protector-strong -mcpu=cortex-a72 -fPIE -pie -Wl,-z,now -Wl,-z,relro -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64  -pipe -O2 --sysroot /home/lawik/projects/nerves_systems/o/rpi4/staging -Wall -Wextra -c -O2 -g -std=c11 -DBUNDLEX_CNODE -I/home/lawik/projects/nerves_systems/o/rpi4/staging/usr/include -o "/home/lawik/projects/foobar2/_build/rpi4_dev/lib/ex_dtls/priv/bundlex/cnode/native_obj/dtls.c_0C08BCA4DB9D85E7538ADA3E550A8E27DBE99D32.o" -I"/home/lawik/projects/foobar2/deps/unifex/c_src/unifex/cnode" -I"/home/lawik/projects/foobar2/deps/unifex/c_src/unifex/cnode" -I"/home/lawik/projects/nerves_systems/o/rpi4/host/lib/erlang/usr/include" -I"/home/lawik/projects/foobar2/deps/ex_dtls/c_src" "/home/lawik/projects/foobar2/deps/ex_dtls/c_src/ex_dtls/dtls.c"
) && \
(/home/lawik/projects/nerves_systems/o/rpi4/host/bin/aarch64-nerves-linux-gnu-gcc -mabi=lp64 -fstack-protector-strong -mcpu=cortex-a72 -fPIE -pie -Wl,-z,now -Wl,-z,relro -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64  -pipe -O2 --sysroot /home/lawik/projects/nerves_systems/o/rpi4/staging -Wall -Wextra -c -O2 -g -std=c11 -DBUNDLEX_CNODE -I/home/lawik/projects/nerves_systems/o/rpi4/staging/usr/include -o "/home/lawik/projects/foobar2/_build/rpi4_dev/lib/ex_dtls/priv/bundlex/cnode/native_obj/dyn_buff.c_92302C7051765367C3E581FDA43F463A75950D80.o" -I"/home/lawik/projects/foobar2/deps/unifex/c_src/unifex/cnode" -I"/home/lawik/projects/foobar2/deps/unifex/c_src/unifex/cnode" -I"/home/lawik/projects/nerves_systems/o/rpi4/host/lib/erlang/usr/include" -I"/home/lawik/projects/foobar2/deps/ex_dtls/c_src" "/home/lawik/projects/foobar2/deps/ex_dtls/c_src/ex_dtls/dyn_buff.c"
) && \
(/home/lawik/projects/nerves_systems/o/rpi4/host/bin/aarch64-nerves-linux-gnu-gcc --sysroot=/home/lawik/projects/nerves_systems/o/rpi4/staging -o "/home/lawik/projects/foobar2/_build/rpi4_dev/lib/ex_dtls/priv/bundlex/cnode/native" -Wl,--disable-new-dtags,--whole-archive "/home/lawik/projects/foobar2/_build/rpi4_dev/lib/unifex/priv/bundlex/cnode/unifex.a" -Wl,--no-whole-archive "/home/lawik/projects/foobar2/_build/rpi4_dev/lib/ex_dtls/priv/bundlex/cnode/native_obj/native.c_E32A9D3FEA256B1A8DAED2737033FDB583FAE1B0.o" "/home/lawik/projects/foobar2/_build/rpi4_dev/lib/ex_dtls/priv/bundlex/cnode/native_obj/native.c_EAA168AA822A21524D976C585CEB985228B6BF0A.o" "/home/lawik/projects/foobar2/_build/rpi4_dev/lib/ex_dtls/priv/bundlex/cnode/native_obj/dtls.c_0C08BCA4DB9D85E7538ADA3E550A8E27DBE99D32.o" "/home/lawik/projects/foobar2/_build/rpi4_dev/lib/ex_dtls/priv/bundlex/cnode/native_obj/dyn_buff.c_92302C7051765367C3E581FDA43F463A75950D80.o" -L"/home/lawik/projects/nerves_systems/o/rpi4/host/lib/erlang/usr/lib" -lpthread -lpthread -lpthread -lei -lpthread -L/home/lawik/projects/nerves_systems/o/rpi4/staging/usr/lib -lssl -lcrypto
)