[LLVMdev] Transitioning build to cmake
chisophugis at gmail.com
Wed Jul 24 13:07:32 PDT 2013
On Wed, Jul 24, 2013 at 1:03 PM, Jeremy Huddleston Sequoia <
jeremyhu at apple.com> wrote:
> 4) Building clang using installed llvm
>> It looks like there is some support for building clang against an
>> installed llvm by setting CLANG_PATH_TO_LLVM_BUILD. This fails miserably
>> in part because the installed llvm cmake files reference build time paths,
>> but even after fixing that, there are tons of build failures. I'm guessing
>> this is still a work in progress, but if I should file bugs, please let me
> This is probably not a very good idea because clang evolves in lock-step
> with LLVM. Unless the installed LLVM is the same revision as the clang you
> are building,
> They match revision. We just need to split the build into two subports to
> break dependency cycles, and I'm hoping to avoid rebuilding the core
> libraries a second time.
Ah, OK. Definitely a bug in our build system then.
-- Sean Silva
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