llvm-gcc4 lacks support for C++ exceptions

[lattner]

Bugzilla Link	870
Resolution	FIXED
Resolved on	Dec 31, 2007 03:24
Version	1.5
OS	All
Depends On	#964 llvm/llvm-bugzilla-archive#1379 llvm/llvm-bugzilla-archive#1380 llvm/llvm-bugzilla-archive#1410 llvm/llvm-bugzilla-archive#1414 llvm/llvm-bugzilla-archive#1415 llvm/llvm-bugzilla-archive#1443
Blocks	#870 #1016 llvm/llvm-bugzilla-archive#1522
CC	@asl

Extended Description

Tracking bug, this prevents llvm-gcc4 from fully replacing llvm-gcc3.

[llvmbot]

Jim,

Could you update this PR with the current status of what remains to be done?

Thanks,

Reid.

[asl]

Current status:

Thanks to Jim, EH supports is basically runnable. We've successfully run
Shootout-C++/except test on x86/linux. Dunkan is working on some ADA-related
testcases.

There are many small glitches preventing LLVM-side of code to be usable in many
situations, but we're slowly progressing :)

The biggest "bad" thing is lack of support from GCC runtime (this is llvm/llvm-bugzilla-archive#1379 ),
thus we need to link system (e.g. not compiled by llvm-gcc) libgcc, which
includes working runtime implementation.

[llvmbot]

As far as I know llvm-gcc-4.2 fully supports C++ exceptions, while
llvm-gcc-4.0 mostly supports them (it doesn't handle some corner
cases correctly).