Issue while compiling the code

[Shubhanjan-GGOD]

Hello Everyone,

I cloned the repository and followed the developer environment setup steps outlined in the README to build Clad. The build was successful, but when I tried to compile my code, I encountered an error: "unable to load plugin clang: undefined symbol." I've attempted various troubleshooting methods, but nothing has worked so far. I'm using Ubuntu 24.04.2, Clang and LLVM version 18.1.8, and CMake version 3.28.3. Any guidance or suggestions would be greatly appreciated.

Thanks!

[vgvassilev]

Can you paste the symbol error and the path to the clang compiler? The compiler binary should be the one you built clad against.

[vgvassilev]

You need to run make clang

[Shubhanjan-GGOD]

@vgvassilev Sir , I am getting this error while building clang using make -[100%] Linking CXX executable ../../../../bin/clang
collect2: fatal error: ld terminated with signal 9 [Killed]
compilation terminated.
make[3]: *** [tools/clang/tools/driver/CMakeFiles/clang.dir/build.make:269: bin/clang-18] Error 1
make[3]: *** Deleting file 'bin/clang-18'
make[2]: *** [CMakeFiles/Makefile2:33865: tools/clang/tools/driver/CMakeFiles/clang.dir/all] Error 2
make[1]: *** [CMakeFiles/Makefile2:33872: tools/clang/tools/driver/CMakeFiles/clang.dir/rule] Error 2
make: *** [Makefile:9289: clang] Error 2
I've tried building with both Ninja and the gold linker, but it failed both times. My host system has 16GB of RAM, but the virtual machine running Ubuntu has only 8GB allocated. Given these memory limitations, should I try building the release version of Clang instead of the debug version?
If you have any suggestions or alternative approaches for the build process, I would greatly appreciate your guidance!

[vgvassilev]

Given these memory limitations, should I try building the release version of Clang instead of the debug version?

8GB is not a lot nowadays, maybe try running ninja -j1 or indeed try a release build...

[Shubhanjan-GGOD]

Hello @vgvassilev Sir,
Thank you very much! I successfully compiled the source code using Clad and Clang. However, I wasn't able to build Clad following the steps in the README (developer environment). The command mkdir build && cd build cmake -DLLVM_ENABLE_PROJECTS="clang" -DLLVM_EXTERNAL_PROJECTS=clad -DLLVM_EXTERNAL_CLAD_SOURCE_DIR=../../clad -DCMAKE_BUILD_TYPE="Debug" -DLLVM_TARGETS_TO_BUILD=host -DLLVM_INSTALL_UTILS=ON ../llvm would build Clad, but not Clang.

Later, using the Clad documentation, I built Clang and LLVM separately with the Ninja and Gold linker configuration provided in the Clad docs: cmake -G Ninja /path/to/llvm-project/llvm -DLLVM_USE_LINKER=gold -DCMAKE_BUILD_TYPE=Debug -DLLVM_TARGETS_TO_BUILD=host -DBUILD_SHARED_LIBS=On -DLLVM_USE_SPLIT_DWARF=On -DLLVM_OPTIMIZED_TABLEGEN=On -DLLVM_ENABLE_PROJECTS=clang -DCMAKE_INSTALL_PREFIX=../inst
Then I ran the build command ninja -j1 as instructed by you.
I think the README may need to be updated, especially for first-time users, as the current instructions don't fully explain how to build both Clad and Clang separately. A clearer explanation, perhaps with additional details about using Ninja and the Gold linker, would help avoid confusion.

[vgvassilev]

Glad to hear. Feel free to submit a PR updating the readme.

[Shubhanjan-GGOD]

Okay Sir.

[LisithaDiz]

same error

[vgvassilev]

Generally you need more ram or swap.