[cpullvm] Added build-essential to restore missing C++ headers on ubu…

[pranav4330]

Ubuntu 24.04 ARM runner no longer includes default C++ headers (libstdc++-dev).
This causes missing header errors like during builds.
Adding build-essential restores the standard C++ toolchain and fixes the issue.

[Ana Pazos (apazos)]

build-essential brings GCC and GCC libraries, no LLVM libraries which is the cause of builder failure.

[Ana Pazos (apazos)]

pranav4330,

Go back to the code that installs:
sudo apt install -y libc++-dev libc++abi-dev

And then try to run these commands after the installation to understand better what is failing:
echo '#include ' > test.cpp
echo 'int main() { std::cout << "Hello, Clang on Ubuntu 24.04!" << std::endl; return 0; }' >> test.cpp
clang++ -std=c++17 -stdlib=libc++ test.cpp -o test_clang
./test_clang

If this test passes, then you successfully resolved the problem. Otherwise, it might give us more hints on what needs to be fixed.

[Ana Pazos (apazos)]

You can also add -v to clang command line to see where clang is searching for C++ lib, and see if it matches what you installed.

[pranav4330]

Okay Thank you for the input, i will check on this once and update.

[Jonathon Penix (jonathonpenix)]

I think this has been superseded by #362 right?

Might want to close this one/mark it as a draft just to avoid confusion

[Jonathon Penix (jonathonpenix)]

Setting "Request changes" just to mark that #362 is the active review to fix this