Error when compiling the tcp_client/server example

[qmyyxtl]

I see a new pull_requests for the socket_api so i want to comile the example and test. But when I use cmake to complie the code, there is an error
/wasm-micro-runtime/samples/network/wasm-src/tcp_client.c:14:10: fatal error: 'wasi_socket_ext.h' file not found #include <wasi_socket_ext.h>
how can i fix it?

[qmyyxtl]

I compile the sample use the command

cmake -DWASI_SDK_PREFIX=/opt/wasi-sdk -DCMAKE_TOOLCHAIN_FILE=/home/yxz/wasm_tools/wasm-pr/wasm-micro-runtime/wamr-sdk/app/wasi_toolchain.cmake -DCMAKE_SYSROOT=/opt/wasi-sdk/share/wasi-sysroot ..
make

And the result shows wasi_socket_ext.h file not found

[lum1n0us]

Cannot repeat it locally. Only some general suggestions:

• please checkout to the latest commit d0a5ce7 and the branch dev/socket_api. It is still an experiment feature.
• a shorter command like $cmake -DWASI_SDK_DIR=/opt/wasi-sdk .. or even $cmake .. is fine.

[qmyyxtl]

It can work now. I rebuild it.
But some eror happens when i try to run the wasm file.
If i run the executable file tcp_server and tcp_client, it works and can receive the massage.
But when I want to run tcp_server.wasm use

../../../product-mini/platforms/linux/build/iwasm tcp_server.wasm

It comes to an error

WASM module load failed: invalid section id

[wenyongh]

@qmyyxtl please build iwasm with libc-wasi and lib-pthread enabled: cmake .. -DWAMR_BUILD_LIB_PTHREAD=1, thanks.
We also uploaded PR #1040 to refine to sample and document, the user experience should be better after it is merged.

[qmyyxtl]

@wenyongh thanks a lot, I follow the PR README and build it. It seems that building still has some problems, but the tcp_server.wasm and tcp_client.wasm can be run now.
The cmake result:

[ 98%] Performing install step for 'wasm-app'
Error copying file "tcp_client.wasm.dump" to "/home/yxz/wasm_tools/wasm-pr/wasm-micro-runtime/samples/socket-api/build".
Error copying file "tcp_server.wasm.dump" to "/home/yxz/wasm_tools/wasm-pr/wasm-micro-runtime/samples/socket-api/build".
make[2]: *** [CMakeFiles/wasm-app.dir/build.make:102: wasm-app-prefix/src/wasm-app-stamp/wasm-app-install] Error 1
make[1]: *** [CMakeFiles/Makefile2:195: CMakeFiles/wasm-app.dir/all] Error 2
make: *** [Makefile:91: all] Error 2

I notice that wabt is required but I havn't downloaded it yet. Is it the reason for the error or not? Although I think it doesn't matter for running

[lum1n0us]

WABT is used to examine that the socket APIs are all bridged to imported ones. Please feel free to skip that by changing CMakeLists.txt.