[Haskell-beginners] Use mysql-simple (OS X and dymanic library trouble)

[emacstheviking]

Didn't somebody produce a 100% Haskell mysql client a while back?


On 25 October 2014 16:30, Brandon Allbery <allbery.b at gmail.com> wrote:

> On Sat, Oct 25, 2014 at 11:22 AM, Christian Sperandio <
> christian.sperandio at gmail.com> wrote:
>
>> Thanks for the trick :)
>>
>> The solution is perhaps to try another mysql library :/
>>
>
> It's the nonstandard location that is the problem, really. The
> --extra-lib-dirs thing should have caused the special location to be used,
> but it relies on whoever wrote the bindings paying attention to
> extra-lib-dirs.
>
> On Linux, you have /etc/ld.so.conf as a list of directories to search for
> shared objects and LD_LIBRARY_PATH to add extra directories to it. On OS X,
> shared library paths are normally compiled into the things that use them
> and DYLD_LIBRARY_PATH overrides this completely (which means setting it can
> cause all programs to fail to find any shared libraries, oops!).
> DYLD_FALLBACK_LIBRARY_PATH is tried if it can't find the shared library at
> its normal location, which is risky but safer than DYLD_LIBRARY_PATH.
>
> If that shared object /Users/batman/Library/Haskell/
> ghc-7.8.3-x86_64/lib/mysql-0.1.1.7/libHSmysql-0.1.1.7-ghc7.8.3.dylib was
> built with the right option (-headerpad_max_install_names, IIRC) then you
> may be able to use install_name_tool to fix the shared object path in it.
> You'll need to use otool -L to check what name is there and then
> install_name_tool to replace it.
>
> Alternately you can check with otool -L what pathname was stored in the
> mysql shared library itself and maybe fix that with install_name_tool.
>
> --
> brandon s allbery kf8nh                               sine nomine
> associates
> allbery.b at gmail.com
> ballbery at sinenomine.net
> unix, openafs, kerberos, infrastructure, xmonad
> http://sinenomine.net
>
> _______________________________________________
> Beginners mailing list
> Beginners at haskell.org
> http://www.haskell.org/mailman/listinfo/beginners
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.haskell.org/pipermail/beginners/attachments/20141026/8899cb11/attachment.html>