The blaze-textual issue is intentional: There's a bug in GHC that prevents C++ code from working correctly with Template Haskell, and newer versions of blaze-textual use a C++ library for parsing doubles. I'm hoping that the defaults change on blaze-textual to use the native code instead so that I can relax this dependency. On Wed, Aug 17, 2011 at 7:31 AM, Sebastian Fischer wrote:

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I'm glad to announce the alpha release of TKYProf.

This looks useful, thanks! I'll try it out and let you know if I have problems. Installing with GHC 7.2, I needed to relax some upper bounds in cabal files of dependencies (maintainers CC'ed).   - email-validate and ranges specify base < 4.4 but also seem to work with base < 5.   - yesod-json specifies blaze-textual < 0.2 but also seems to work with blaze-textual < 0.3 Additionally, I linked /usr/lib/libstdc++.so.6 to /usr/lib/libstdc++.so before I could successfully install tkyprof. Not sure about the consequences.. Cheers, Sebastian

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 http://hackage.haskell.org/package/tkyprof  https://github.com/maoe/tkyprof

TKYprof is a web-based interacitve visualizer for GHC time and allocation profiling reports. It helps you to find the bottlenecks in your code quickly!

Here is a blog post:

  http://blog.foldr.in/tkyprof-a-web-based-interactive-visualizer-fo

It is still alpha and it have some bugs. I'm happy to hear your feedback.

Thanks,

-- Mitsutoshi Aoe maoe@foldr.in

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I'm not sure I understand the comments there. Does this solve the issue for GHC 7.2 only, or for 7.* as well? Yesod is still officially supporting 6.12 and 7.0. On Wed, Aug 17, 2011 at 11:17 AM, Bas van Dijk wrote:

On 17 August 2011 07:16, Michael Snoyman wrote:

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There's a bug in GHC that prevents C++ code from working correctly with Template Haskell

For reference this is the bug Michael is talking about:

http://hackage.haskell.org/trac/ghc/ticket/5289

As explained by Sebastian and the ticket, to work around this you need to perform the following steps:

$ sudo ln -vs $(gcc --print-file-name=libstdc++.so) /usr/local/lib/ $ sudo ldconfig

Regards,

Bas