[LLVMdev] Dropping support for llvm-gcc3
rspencer at reidspencer.com
Mon Dec 4 10:16:53 PST 2006
This doesn't affect release 1.X users, only those using the LLVM current
(CVS head) version.
With recent changes, the current version of LLVM will no longer read old
assembly or bytecode files. The upgrade path from 1.X to 2.0 is now
provided by the new llvm-upgrade tool. See:
for details on how to use this command.
llvm-gcc3 generates old assembly code that will no longer assemble
correctly when read by gccas. The change to llvm-gcc3 necessary to get
it to emit the new instruction formats is too complicated since there is
an alternative: llvm-gcc4. Consequently, we are dropping support for
llvm-gcc3 as of today.
How to cope with this change:
1. If you are managing a nightly tester, please have it use llvm-gcc4
of llvm-gcc3. If you don't, everything will fail (currently is
2. If you must use the (really slow) exception handling support in
continue to use LLVM 1.9 until EH support is implemented in 2.0.
3. If you must use llvm-gcc3 for other reasons, it might be possible to
hack it so
that it runs llvm-upgrade before it runs gccas. If you do this,
please submit the
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