CANNOT LINK EXECUTABLE on Android

[AndradeMaicon]

Description

Hi, I followed the guide and build wasmedge for Android but when I try to run an example the runtimer throws the following exception,
"CANNOT LINK EXECUTABLE "./wasmedge": library "libwasmedge.so" not found: needed by main executable".

Please, can you help me understand what I did wrong?

Environment

• Hardware Architecture: (e.g. x86_64 or aarch64)
• Operating system: (e.g. Ubuntu 20.04)
• In this case try using my own smartphone to run these tests see the link below to give more information.
  Samsung Galaxy S21 5G -> https://www.gsmarena.com/samsung_galaxy_s21_fe_5g-10954.php

[hydai]

Hi @AndradeMaicon
Do you copy all built files on Android?
WasmEdge will build libwasmedge.so (and libwasmedge.0.0.x). The cli tools rely on libwasmedge.so.

[AndradeMaicon]

Hi @hydai, thanks for answer me;
So I followed every step in the WasmEdge documentation exactly as was. But now I thought this error might have been caused during build and for this reason when I push the wasmedge folder to my Android device this files are missing.

If possible, I would like you to look at the repository I created with the result of my local build (sorry, I know it's not good practice but it's temporary) maybe with your experience you can tell me if there is indeed a problem with mine build.

I'm running ./utils/android/standalone/build_for_android.sh to build and cp -r examples build/tools/wasmedge/examples to copy the artifacts and inside de build folder adb push ./tools/wasmedge /data/local/tmp to push all files to my device.

[hydai]

The libwasmedge.so is located in <build folder>/lib/api/*.so So it should be copied as well with the wasmedge.

[AndradeMaicon]

I had already tried this alternative. At first, I had copied the whole folder into /data/local/tmp and in another attempt, I copied it into the wasmedge folder (/data/local/tmp/wasmedge). After your last answer I tried copying just the libwasmedge.so file and repeated the same tests but I keep getting the exact same error.

Do you have another suggestion that I could do?

This is the current log from my adb shell

o1s:/data/local/tmp $ ls -la
total 7875
drwxrwx--x 5 shell shell 3452 2023-07-06 10:12 .
drwxr-x--x 6 root root 3452 2022-01-17 01:21 ..
drwxrwxr-x 5 shell shell 3452 2023-05-19 12:13 .studio
-rwxrwxrwx 1 shell shell 8039408 2023-07-06 10:05 libwasmedge.so
drwxrwxrwx 5 shell shell 3452 2023-05-26 14:48 perfd
drwxrwxr-x 4 shell shell 3452 2023-07-06 10:12 wasmedge
o1s:/data/local/tmp $ cd wasmedge/examples/
o1s:/data/local/tmp/wasmedge/examples $ ../wasmedge hello.wasm 1 2 3
CANNOT LINK EXECUTABLE "../wasmedge": library "libwasmedge.so" not found: needed by main executable

[q82419]

You should copy the shared library into your library searching path (such as /usr/local/lib) or use the LD_LIBRARY_PATH environment variable.

[binadamu-isiyoonekana]

Hi folks.
The easiest way is to link wasmedge (or tools) in a static way. For doing so, you should modify the WasmEdge options (see the main CMakeList.txt file, around line 50 for more information on WasmEdge compilation options) passed in the utils/android/standalone/build_for_android.sh around line 14 by adding the following options:
-DWASMEDGE_BUILD_STATIC_LIB=ON -DWASMEDGE_LINK_TOOLS_STATIC=ON
And then it should be okay.
Ciao

[AndradeMaicon]

Hi folks. The easiest way is to link wasmedge (or tools) in a static way. For doing so, you should modify the WasmEdge options (see the main CMakeList.txt file, around line 50 for more information on WasmEdge compilation options) passed in the utils/android/standalone/build_for_android.sh around line 14 by adding the following options: -DWASMEDGE_BUILD_STATIC_LIB=ON -DWASMEDGE_LINK_TOOLS_STATIC=ON And then it should be okay. Ciao

Thanks for your help.