Hey all, got this error when linking a C library t...

# kotlin-native

[Alex Dmitriev]

Hey all, got this error when linking a C library to a Kotlin Native app:

> Task :linkDebugExecutableNativeLinuxX64

e: /home/runner/.konan/dependencies/x86_64-unknown-linux-gnu-gcc-8.3.0-glibc-2.19-kernel-4.9-2/x86_64-unknown-linux-gnu/bin/ld.gold invocation reported errors
The /home/runner/.konan/dependencies/x86_64-unknown-linux-gnu-gcc-8.3.0-glibc-2.19-kernel-4.9-2/x86_64-unknown-linux-gnu/bin/ld.gold command returned non-zero exit code: 1.
output:
/usr/lib/x86_64-linux-gnu/libtinfo.so: error: undefined reference to 'stat', version 'GLIBC_2.33'
/usr/lib/x86_64-linux-gnu/libncurses.so.6: error: undefined reference to 'dlopen', version 'GLIBC_2.34'
/usr/lib/x86_64-linux-gnu/libncurses.so.6: error: undefined reference to 'dlclose', version 'GLIBC_2.34'
/usr/lib/x86_64-linux-gnu/libncurses.so.6: error: undefined reference to 'dlsym', version 'GLIBC_2.34'

> Task :linkDebugExecutableNativeLinuxX64 FAILED

Apparently, glibc bundled with Kotlin Native toolchain (2.19 in x86_64-unknown-linux-gnu-gcc-8.3.0-glibc-2.19-kernel-4.9-2) is of lower version than might be required (GLIBC_2.33 ).
Any clues on how to resolve that would be welcome. Thanks!

[Adam S]

Hi, are you compiling the C lib from source? If so you can use run_konan util to run K/N's gcc

https://github.com/JetBrains/kotlin/blob/v1.9.22/kotlin-native/HACKING.md#running-clang-the-same-way-kotlinnative-compiler-does

Easier said than done! I've got a couple of Gradle util tasks that can compile C into K/N-compatible libs. They're a bit messy, but I'll chuck them into a gist.

[Adam S]

https://gist.github.com/aSemy/076591d565867839b6009f36c3b8b3ae

[Alex Dmitriev]

Hey Adam, thanks for an interesting idea and the gist, I also figure before invoking your code there is a need to tell Konan to replace the dependency it’s using (x86_64-unknown-linux-gnu-gcc-8.3.0-glibc-2.19-kernel-4.9-2) with one that has glibc 2.34, not sure how this can be done.

I’ve also filed an issue for the Kotlin team, for reference.

[Artyom Gornostayev]

Well... No exactly a solution...
I would say a workaround...
You can use docker for setting your build environment.
See this thread.

[Artyom Gornostayev]

I hope this helps you somehow...

[Alex Dmitriev]

I assume this might have solved your issue because container installs curl version which is happy with current CLang toolchain which Konan uses nowadays. Probably I can also play with versions of NCurses needed for my case. Thanks for clues!