Address resource dir config for kernels

[anutosh491]

Description

See https://discord.com/channels/1235591463472074924/1235591601523396680/1304415164753379441

Type of change

Please tick all options which are relevant.

• Bug fix
• New feature
• Added/removed dependencies
• Required documentation updates

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 80.72%. Comparing base (dc14222) to head (fd0e463).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #172   +/-   ##
=======================================
  Coverage   80.72%   80.72%           
=======================================
  Files          19       19           
  Lines         970      970           
  Branches       93       93           
=======================================
  Hits          783      783           
  Misses        187      187           

[anutosh491]

Hmm weird, as can we seen through this commit (62980d0) using a new version of gcc (after updating cxx-compiler to 1.8.0 from 1.7.0) leads to few python tests failing. Let's debug this separately.

[anutosh491]

My understanding here is this.

For providing the resource dir

1. We could either directly provide it through kernel.json or by manually while creating the interpreter.
2. If the above is not done, we would need to use DetectResourceDir from CppInterOp.

But as can be seen in DetectResourceDir we have this (https://github.com/compiler-research/CppInterOp/blob/826be787bb542fe2394a425de78613a4da3eae15/lib/Interpreter/CppInterOp.cpp#L2760)

So as our resource dir is being provided out of clang (based from cxx-compiler) ... the latest that can be provided is version 17 but we use cppinterop compatible with latest clang version (so CLANG_VERSION_MAJOR_STRING is 19) and we don't satisfy the above condition.

Hence the ways to approach this is

1. Maybe not use cxx-compiler and introduce a dependency on clang binary (so that we can get access to latest resource dir)
2. Or fix kernel.json to reference the correct resource dir available out of cxx-compiler and provide the same for tests manually

        std::vector<const char*> Args = {"-v", "-resource-dir", XEUS_CPP_RESOURCE_DIR};
        xcpp::interpreter interpreter((int)Args.size(), Args.data());  

What has been done above is inclined towards the 2nd approach. I shall fix the tests in test_xinterpreter.cpp if we agree to continue with the same.

[anutosh491]

Not ready yet. Bad attempt to be fair. Converting to draft