[llvm-dev] Building SVN head with CMake - shared libraries?

Ismail Donmez via llvm-dev
Fri, 15 Jan 2016 10:19:00 -0000

On Fri, Jan 15, 2016 at 11:08 AM, Ismail Donmez <ismail at i10z.com>
wrote:
> On Fri, Jan 15, 2016 at 11:05 AM, Ismail Donmez <ismail at i10z.com>
wrote:
>> Hi,
>>
>> On Fri, Jan 15, 2016 at 12:59 AM, Chris Bieneman <beanz at
apple.com> wrote:
>>> I’m kinda scared that you’re using it. What are you trying to
accomplish
>>> that you are using it? Generally having LLVM split among that many
>>> dynamically loaded libraries results in significant performance
regressions.
>>
>> When we first switched to cmake it was the only option to produce
>> shared libraries, hence we went with it. I am testing with
>> -DLLVM_BUILD_LLVM_DYLIB=ON -DLLVM_LINK_LLVM_DYLIB=ON atm, and will let
>> you know if any problem arises.
>
> And one immediate "problem" shows up. I ended up with
>
> libLLVM-3.9svn.so
>
> and
>
> libclang.so
> libclang.so.3.9
>
> LLVM's shared lib naming looks wrong.

And one more thing, in this setup llvm-config --libs lists static
libraries which is a no-go because Linux distros in the 99% of the
case want to ship only shared libraries.

Regards,
ismail