Add test for verifying exception handling for emscripten builds

[anutosh491]

Hey @vgvassilev,

If you remember, we were discussing the changes needed to handle the LLVMargs from FrontendOpts for clang-repl the other day.

This led to me coming up with this PR on llvm llvm/llvm-project#132670

But I think CppInterOp does take some inspiration from the above in the past and has added a block for handling the LLVM args

CppInterOp/lib/Interpreter/CppInterOp.cpp

Lines 2962 to 2975 in e1ace51

	// Honor -mllvm.
	//
	// FIXME: Remove this, one day.
	// This should happen AFTER plugins have been loaded!
	const CompilerInstance* Clang = I->getCI();
	if (!Clang->getFrontendOpts().LLVMArgs.empty()) {
	unsigned NumArgs = Clang->getFrontendOpts().LLVMArgs.size();
	auto Args = std::make_unique<const char*[]>(NumArgs + 2);
	Args[0] = "clang (LLVM option parsing)";
	for (unsigned i = 0; i != NumArgs; ++i)
	Args[i + 1] = Clang->getFrontendOpts().LLVMArgs[i].c_str();
	Args[NumArgs + 1] = nullptr;
	llvm::cl::ParseCommandLineOptions(NumArgs + 1, Args.get());
	}

Hence we should be able to process any exception handling case for our emscripten build through cppinterop (though clang-repl in the browser itself won't be able to handle these)

This adds a simple test case for the same. Which we can possibly remove along with the above code block .... once this in completely done in clang-repl itself (possibly like how I tried to achieve it in the above linked PR)

[github-actions]

clang-tidy review says "All clean, LGTM! 👍"

[github-actions]

clang-tidy review says "All clean, LGTM! 👍"

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 75.94%. Comparing base (e1ace51) to head (cdf42b9).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #543   +/-   ##
=======================================
  Coverage   75.94%   75.94%           
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  Files           9        9           
  Lines        3646     3646           
=======================================
  Hits         2769     2769           
  Misses        877      877           

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[anutosh491]

The fail test look completely unrelated

The test I added for the emscripten build passes here (https://github.com/compiler-research/CppInterOp/actions/runs/14192033343/job/39758739024?pr=543#step:8:569)

[anutosh491]

Hi,

I realize some cppyy based tests are failing. Not sure what's going wrong but possibly @Vipul-Cariappa can help me out here ?

[mcbarton]

Hi,

I realize some cppyy based tests are failing. Not sure what's going wrong but possibly @Vipul-Cariappa can help me out here ?

Hi @anutosh491 The cppyy jobs should pass again once compiler-research/cppyy#140 is in. There is some work being done to get some extra cppyy tests passing.

[aaronj0]

Hi,

I realize some cppyy based tests are failing. Not sure what's going wrong but possibly @Vipul-Cariappa can help me out here ?

Sorry about those tests! Should be ready in a couple of minutes and a rerun can be triggered

[github-actions]

clang-tidy review says "All clean, LGTM! 👍"

[vgvassilev]

LGTM!

[aaronj0]

LGTM! One minor comment: Would be good to add the test to the end of the file