[LLVMdev] proposal to avoid zlib dependency.

[Chandler Carruth]

FWIW, I strongly support finding a fully license-compatible way to just
implement zlib-compatible compression with no external library dependencies.

There are a myriad of reasons, some already raised:

- Means that functionality isn't universally available, for example, on
Windows
- Means that we have to debug performance problems or other issues with
different source code depending on the nature of specific libraries used

If the cost is low (and it seems low for miniz or zlib or whatever) why go
through the hassle of using a system library....

On Tue, Sep 16, 2014 at 7:11 PM, Saleem Abdulrasool <compnerd at compnerd.org>
wrote:

> On Tue, Sep 16, 2014 at 4:48 PM, Bob Wilson <bob.wilson at apple.com> wrote:
>
>> If you build with configure+make, just run configure with —disable-zlib.
>> We do this routinely, so I’m pretty sure it works.
>>
>
> It "works" as in it builds.  However, the support for it is disabled since
> zlib::compress will always return StatusUnsupported, so the debug
> information will just not be compressed.  Effectively, compressed DWARF is
> unsupported on Windows.
>
>
>> On Sep 16, 2014, at 3:42 PM, Reid Kleckner <rnk at google.com> wrote:
>>
>> It might not be available, so all codepaths have to recover from zlib
>> unavailability. For example, I don't think compressed DWARF works on
>> Windows.
>>
>> On Tue, Sep 16, 2014 at 3:21 PM, Filip Pizlo <fpizlo at apple.com> wrote:
>>
>>> What is the downside of Zlib dependency?  I'm curious! :-)
>>>
>>> -Filip
>>>
>>> On Sep 16, 2014, at 2:45 PM, Christophe Duvernois <
>>> christophe.duvernois at gmail.com> wrote:
>>>
>>> Hi
>>>
>>> Miniz (https://code.google.com/p/miniz/ ) is very small and performant
>>> implementation of zlib compression with api compatibility and it is public
>>> domain...
>>> Miniz can be integrated directly into the llvm source code.
>>> So it could be a good replacement or alternative to avoid zlib
>>> dependency...
>>>
>>> If someone is interested i can provide a patch.
>>>
>>> Regards
>>> Christophe
>>>
>>> _______________________________________________
>>> LLVM Developers mailing list
>>> LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
>>> http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev
>>>
>>>
>>> _______________________________________________
>>> LLVM Developers mailing list
>>> LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
>>> http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev
>>>
>>>
>> _______________________________________________
>> LLVM Developers mailing list
>> LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
>> http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev
>>
>>
>>
>> _______________________________________________
>> LLVM Developers mailing list
>> LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
>> http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev
>>
>>
>
>
> --
> Saleem Abdulrasool
> compnerd (at) compnerd (dot) org
>
> _______________________________________________
> LLVM Developers mailing list
> LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
> http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20140918/ec061b51/attachment.html>