Hi Dominick,

Awesome. Sounds like everything's working perfectly : ). The 'has no symbols' messages are normal and harmless; I think they can be fixed but in the meantime there is a script in ghc-ios-scripts called "libtool-quiet" that silences them. You can use it by adding  -pgmlibtool libtool-quiet to your GHC arguments.

The output just goes to the iPhone's console which is normally shown in Xcode when you run, but you can also access it with Apple's "iPhone Configurator" app. https://itunes.apple.com/us/app/apple-configurator/id434433123?mt=12 . 

(You could also modify the example to return e.g. an Int and put that on the screen with a UILabel or similar — you can call Haskell from anywhere in your app as long as you've called hs_init at the very beginning. A nice trick is to create an NSObject category with a + (void)load { hs_init(NULL, NULL) } method, which will ensure hs_init is called very early in your program and then you don't have to worry about it anymore.)

Thanks so much for testing!
Cheers
Luke


On Wed, Feb 5, 2014 at 10:22 AM, Dominick Samperi <djsamperi@gmail.com> wrote:
[Luke: forgot to forward to list, sorry for the duplicates]

There are two issues:

1. When I build Counter.a I see lots of messages from libtool saying
"has no symbols",
    for example:
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/libtool:
for architecture: armv7s file:
/usr/local/lib/arm-apple-darwin10-ghc-7.8.20140129/rts-1.0/libHSrts_thr.a(Sanity.thr_o)
has no symbols

2. I have not (yet) joined the developer program since I have no plans to deploy
    to the app store, so instead I have been following the
instructions here to deploy
    to my own device:
http://www.sysrage.net/guides/ios-programming/building-and-running-ios-applications-without-a-paid-developer-license

Following these instructions I am able to copy  HaskellCounter (my name for
your test app) to my device, and I see the HaskellCounter icon, but when I
start the app I just see a blank screen. Looking at

Counter.hs this is not too surprising, as I see no code that would update the
Single View screen? I'm not sure where the output of putStrLn goes when
an app is run on the device.

Dominick


On Wed, Feb 5, 2014 at 4:27 AM, Luke Iannini <lukexipd@gmail.com> wrote:
> Hi Dominick and all,
>
> That's great news!
>
> I've created a README here:
> https://github.com/ghc-ios/ghc-ios-scripts/blob/master/README.md
>
> Note that the binary posted above is only for the device. I'll post the
> simulator version shortly along with instructions on how to create fat
> libraries that contain both simulator and device code.
>
> Please let me know if you have any questions or issues!
>
> Very best
> Luke
>
>
> On Tue, Feb 4, 2014 at 11:35 PM, Dominick Samperi <djsamperi@gmail.com>
> wrote:
>>
>> Hello Luke,
>>
>> It installed without problems under Mac OS X Mavericks and reports the
>> version correctly. If there is some documentation that you can point me to
>> I will test on my simulator and iPhone.
>>
>> Thanks,
>> Dominick
>>
>>
>> On Wed, Feb 5, 2014 at 1:36 AM, Luke Iannini <lukexipd@gmail.com> wrote:
>> > Hi all,
>> >
>> > I believe I've worked around the issues with make binary-dist and
>> > cross-compilation.
>> >
>> > This should be a working binary for iOS devices
>> >
>> > https://github.com/ghc-ios/ghc-ios-scripts/releases/download/7.8-rc1-device/ghc-7.8.20140129-arm-apple-ios.tar.bz2
>> >
>> > Please try ./configure && make install (it should live happily next to
>> > your
>> > current ghc as arm-apple-darwin10-ghc) and let me know so we can have a
>> > build ready for 7.8 RC2!
>> >
>> > Cheers
>> > Luke
>> >
>> > _______________________________________________
>> > ghc-devs mailing list
>> > ghc-devs@haskell.org
>> > http://www.haskell.org/mailman/listinfo/ghc-devs
>> >
>
>