[Haskell-iPhone] Fat binaries on iOS Target

[Carter Schonwald]

Huh.  Could you write up a ticket on trac?  This could be considered a bug
in cross compilation.  Explain that you're trying to make sure the object
code for iOS is small.

@luke, are there any tricks for managing object size you've done

There are some ideas to reduce object size for ghc 7.10, but that doesn't
help you write now.


@Joe: one idea could be to mess with the ghc flags that relate to Inlining.
 Reducing the amount of Inlining may help with object size, BUT may make
things slower.  I don't recall what the relevant ghc flags are off hand.
You'd have to do some digging.



On Wednesday, December 25, 2013, Joe wrote:

> Hi Carter,
>
> When I have added “split-objs: True” in .cabal/config file, but when
> running cabal I got this message:
>
> Preprocessing library pandoc-1.12.2.1...
> unused terminals: 1
>
> on the commandline: Warning: ignoring -fsplit-objs
>
> And if I ignore that, at the end of build, I get another error message
> that stop the build.
>
> cabal: dist-i386/build/Text/Pandoc_o_split: does not exist
>
> It seems that split-objs cannot work with cross-compilation ghc.
>
> What do you think?
>
> Best regards,
> Joe
>
> On Dec 25, 2013, at 8:46 PM, Carter Schonwald <carter.schonwald at gmail.com<javascript:_e({}, 'cvml', 'carter.schonwald at gmail.com');>>
> wrote:
>
> You need to make sure every lib is built with split objs, not just the
> final application.  Did you try it that way?   You could also try to limit
> the amount of Inlining in your application too
>
> On Wednesday, December 25, 2013, Joe wrote:
>
>> Hi,
>>
>> I’m asking similar question on haskell-cafe group, but I think it’s more
>> appropriate to ask here since it’s iPhone related. Please forgive my double
>> post.
>>
>> I have been trying to statically link Pandoc packages to iOS application
>> and I want to say that what have been done so far as explained in
>> https://ghc.haskell.org/trac/ghc/wiki/Building/CrossCompiling/iOS is
>> great! I have finally successfully use Pandoc library in iOS app, but
>> there’s an issue that the final app binary is *more than 50MB* when
>> using Pandoc library. It’s around 5MB for simple haskell library. And
>> without using Haskell, it’s around 100kb.
>>
>> Is it possible to strip the executable binary? I read that stripping is
>> not possible using xcode strip. I also try to add -split-objs flag, but
>> it’s not working either.
>>
>> Any idea? Is this a known issue?
>>
>> Thanks for making Haskell work on iOS!
>>
>> Best regards and merry christmas,
>> Joe
>>
>
>
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