Importing Haskell Libraries like System.Random

Question

So I've been searching and searching on how to fix this issue and I've had no luck finding out how.

First of all I want to import System.Random into my Haskell program.

import System.Random

Unfortunately it isn't that easy... When I execute the program in ghci this is what it returns:

Could not find module `System.Random'
Use -v to see a list of the files searched for.

So obviously I do what it says... Same issue except I see what package database it is using:

Using binary package database: /usr/local/Cellar/ghc/7.6.3/lib/ghc-7.6.3/package.conf.d/package.cache

I go to that directory and surprise surprise... My random packages isn't there. I go to my .cabal/packages and copy my random-1.0.1.1 file to the

/usr/local/Cellar/ghc/7.6.3/lib/ghc-7.6.3/

directory where the other packages are. I run the program again and still get the same error. I realize when I look in the ghc-7.6.3/package.conf.d, that there is no file pointing towards the random file within the the lib.

What do I do??

I am desperate. How do I install packages!!!

---

Also I've tried cabal install but I get a huge error:

Failed to install random-1.0.1.1
Last 10 lines of the build log ( /Users/mikeecb/.cabal/logs/random-1.0.1.1.log ):
cabal: Error: some packages failed to install:
random-1.0.1.1 failed during the configure step. The exception was:
user error (In file included from
/usr/local/Cellar/ghc/7.6.3/lib/ghc-7.6.3/include/Rts.h:30,

from
/var/folders/lw/mwgzrbns2j10_p75xtydr9_r0000gn/T/ghc3806_0/ghc3806_0.c:1:0:


/usr/local/Cellar/ghc/7.6.3/lib/ghc-7.6.3/include/Stg.h:65:18:
error: math.h: No such file or directory
In file included from
/usr/local/Cellar/ghc/7.6.3/lib/ghc-7.6.3/include/Rts.h:32,

from
/var/folders/lw/mwgzrbns2j10_p75xtydr9_r0000gn/T/ghc3806_0/ghc3806_0.c:1:0:


/usr/local/Cellar/ghc/7.6.3/lib/ghc-7.6.3/include/HsFFI.h:30:20:
error: stdint.h: No such file or directory

In file included from
/var/folders/lw/mwgzrbns2j10_p75xtydr9_r0000gn/T/ghc3806_0/ghc3806_0.c:1:0:


/usr/local/Cellar/ghc/7.6.3/lib/ghc-7.6.3/include/Rts.h:190:20:
error: stdlib.h: No such file or directory
In file included from
/usr/local/Cellar/ghc/7.6.3/lib/ghc-7.6.3/include/Rts.h:227,

from
/var/folders/lw/mwgzrbns2j10_p75xtydr9_r0000gn/T/ghc3806_0/ghc3806_0.c:1:0:


/usr/local/Cellar/ghc/7.6.3/lib/ghc-7.6.3/include/rts/Flags.h:17:19:
error: stdio.h: No such file or directory
In file included from
/usr/local/Cellar/ghc/7.6.3/lib/ghc-7.6.3/include/Rts.h:227,

from
/var/folders/lw/mwgzrbns2j10_p75xtydr9_r0000gn/T/ghc3806_0/ghc3806_0.c:1:0:


/usr/local/Cellar/ghc/7.6.3/lib/ghc-7.6.3/include/rts/Flags.h:22:0:
error: expected specifier-qualifier-list before ‘FILE’

/usr/local/Cellar/ghc/7.6.3/lib/ghc-7.6.3/include/rts/Flags.h:188:0:
error: expected specifier-qualifier-list before ‘FILE’
In file included from
/usr/local/Cellar/ghc/7.6.3/lib/ghc-7.6.3/include/Rts.h:234,

from
/var/folders/lw/mwgzrbns2j10_p75xtydr9_r0000gn/T/ghc3806_0/ghc3806_0.c:1:0:


/usr/local/Cellar/ghc/7.6.3/lib/ghc-7.6.3/include/rts/Threads.h:19:23:
error: sys/types.h: No such file or directory
In file included from
/usr/local/Cellar/ghc/7.6.3/lib/ghc-7.6.3/include/Rts.h:234,

from
/var/folders/lw/mwgzrbns2j10_p75xtydr9_r0000gn/T/ghc3806_0/ghc3806_0.c:1:0:


/usr/local/Cellar/ghc/7.6.3/lib/ghc-7.6.3/include/rts/Threads.h:49:0:
error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘forkProcess’
)

Answer 1

So it appears that uninstalling and then reinstalling GHC from the Haskell Platform for Mac OSX got it working properly.