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

[Christian Sperandio]

I tried your solution but it doesn’t work.

I unregistered the previous install with ghc-pkg unregister (for mysql and mysql-simple) and I tried:
cabal install mysql --extra-lib-dirs=/usr/local/mysql-5.6.11-osx10.7-x86_64/lib

But I get the error again:

Resolving dependencies...
Configuring mysql-0.1.1.7...
Building mysql-0.1.1.7...
Failed to install mysql-0.1.1.7
Last 10 lines of the build log ( /Users/batman/.cabal/logs/mysql-0.1.1.7.log ):
Building mysql-0.1.1.7...
Preprocessing library mysql-0.1.1.7...
dyld: Library not loaded: libmysqlclient.18.dylib
  Referenced from: /private/var/folders/fk/339860r16j759wmsfmjkyr4h0000gn/T/mysql-0.1.1.7-25273/mysql-0.1.1.7/dist/build/Database/MySQL/Base/C_hsc_make
  Reason: image not found
running dist/build/Database/MySQL/Base/C_hsc_make failed (exit code -5)
command was: dist/build/Database/MySQL/Base/C_hsc_make  >dist/build/Database/MySQL/Base/C.hs
cabal: Error: some packages failed to install:
mysql-0.1.1.7 failed during the building phase. The exception was:
ExitFailure 1




Le 25 oct. 2014 à 15:43, Brandon Allbery <allbery.b at gmail.com> a écrit :

> On Sat, Oct 25, 2014 at 8:07 AM, Christian Sperandio <christian.sperandio at gmail.com> wrote:
> After, to link the mysql-simple package I did an export LD_LIBRARY_PATH=/usr/local/mysql-5.6.11-osx10.7-x86_64/lib. Thus, the library libmysqlclient.18.dylib was found.
> 
> This is usually a bad idea, and what you're seeing is the least of the things that can go wrong.
> 
> The correct fix for all of this is not to use the environment settings, but to build the mysql binding with
> 
>     cabal install mysql-simple --extra-lib-dirs=/usr/local/mysql-5.6.11-osx10.7-x86_64/lib
> 
> so it actually finds and records the location of the library instead of using an unsafe override that you have to reproduce at runtime (doing that for anything launched from the GUI is difficult, and in some OS X releases impossible, and is always risky).
> 
> -- 
> brandon s allbery kf8nh                               sine nomine associates
> allbery.b at gmail.com                                  ballbery at sinenomine.net
> unix, openafs, kerberos, infrastructure, xmonad        http://sinenomine.net
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