llvm dev - Sep 2015 - Building clang in llvm-3.7 on Linux with RT support enabled

Hi Chris and Alex,

Many thanks for these replies.  
> I dug a little deeper into the history here. It looks like the blocks
runtime hasn’t built in the CMake build system in a long time, and I don’t think
it has ever been supported in the autoconf system.
> 
> Support for building it with CMake was removed in April 2012 along with the
old CMake build system (r154059) because it was broken. The old CMake support
could probably be used as a base for bringing it back, but I would caution that
you’re wading into seriously uncharted territory.
Is there an alternative build method I could use in order to create the blocks
runtime on Linux?  The docs seemed to recommend cmake ('cmake -G "Unix
Makefiles" ../llvm'), but I'd be more than glad to try another way.
I think blocks are required for GNUstep, since it's an Objective-C runtime.

Thanks,

David
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Unfortunately you’ll need to either modify the LLVM build system to build it, or
you’ll need to build it yourself by hand. We don’t currently support building
the blocks runtime.

I’m guessing the Docs are about 3 years out of date.

You can feel free to file a bug at https://llvm.org/bugs/
<https://llvm.org/bugs/>, but I don’t know when it will be addressed, ant
it is unlikely we will back port it to 3.7.

-Chris
> On Sep 29, 2015, at 11:24 AM, David Lobron <dlobron at akamai.com>
wrote:
> 
> Hi Chris and Alex,
> 
> Many thanks for these replies.  
> 
>> I dug a little deeper into the history here. It looks like the blocks
runtime hasn’t built in the CMake build system in a long time, and I don’t think
it has ever been supported in the autoconf system.
>> 
>> Support for building it with CMake was removed in April 2012 along with
the old CMake build system (r154059) because it was broken. The old CMake
support could probably be used as a base for bringing it back, but I would
caution that you’re wading into seriously uncharted territory.
> 
> Is there an alternative build method I could use in order to create the
blocks runtime on Linux?  The docs seemed to recommend cmake ('cmake -G
"Unix Makefiles" ../llvm'), but I'd be more than glad to try
another way.  I think blocks are required for GNUstep, since it's an
Objective-C runtime.
> 
> Thanks,
> 
> David
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> Unfortunately you’ll need to either modify the LLVM build system to build
it, or you’ll need to build it yourself by hand. We don’t currently support
building the blocks runtime.
Thanks!  I'm working on a modified build now.

Out of curiosity: is cmake still the preferred way to build on Linux?  You
mentioned that the doc is out-of-date, so I thought perhaps there might be a
newer way to do it.

Thank you again,

David
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