Re: building llvm optimizations for libobjc2

[David Chisnall]

On 8 Dec 2011, at 12:09, Sebastian Reitenbach wrote:

> Is there an easy way to get this to work with the cmake build system?

Possibly...

> as far as I understand the build_opts.sh right, I'm supposed to run a 
> build_opts.sh gmake all and then later a build_opts.sh gmake install,

Correct.

> which would build the whole llvm/cmake and install the whole llvm/cmake

No, it will build and install just the optimisations, but it needs to build it 
inside the LLVM tree currently.

> . Is there a way to just only build and install the optimizations?

Yes, build_opts.sh gmake, build_opts.sh gmake install does exactly that, but it 
requires the LLVM build system to be working.  

Take a look in llvm/lib/Transforms/Hello.  This is a simple LLVM plugin example 
that provides both build systems.  You should be able to copy the CMake build 
system files from that, modify them to match the GNU makefiles for the libobjc2 
optimisations, and use it instead.  In theory, this may support out-of-tree 
building, but I have no idea if that actually works...

David

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