[Haskell-cafe] In-place modification

[Andrew Coppin]

Stefan O'Rear wrote:
> On Mon, Jul 09, 2007 at 10:01:06PM +0100, Andrew Coppin wrote:
>   
>> Is it safe to install two versions of GHC at once? :-.
>>     
>
> Certainly.  I have no less than twelve.
>
> stefan at stefans:~$ ls -l /usr/bin/ghc-6* /usr/local/bin/ghc-6*
> lrwxrwxrwx 1 root root   30 2007-05-26 08:50 /usr/bin/ghc-6.6.1 -> ../lib/ghc-6.6.1/bin/ghc-6.6.1
> -rwxr-xr-x 1 root staff 385 2006-12-24 13:43 /usr/local/bin/ghc-6.4.2
> -rwxr-xr-x 1 root staff 145 2007-01-13 16:52 /usr/local/bin/ghc-6.7
> -rwxr-xr-x 1 root staff 172 2007-02-13 18:20 /usr/local/bin/ghc-6.7.20070213
> -rwxr-xr-x 1 root staff 172 2007-02-24 01:29 /usr/local/bin/ghc-6.7.20070223
> -rwxr-xr-x 1 root staff 172 2007-03-25 19:53 /usr/local/bin/ghc-6.7.20070323
> -rwxr-xr-x 1 root staff 172 2007-04-01 14:04 /usr/local/bin/ghc-6.7.20070402
> -rwxr-xr-x 1 root staff 172 2007-04-14 10:35 /usr/local/bin/ghc-6.7.20070413
> -rwxr-xr-x 1 root staff 172 2007-05-02 18:46 /usr/local/bin/ghc-6.7.20070502
> -rwxr-xr-x 1 root staff 172 2007-05-19 16:01 /usr/local/bin/ghc-6.7.20070518
> -rwxr-xr-x 1 root staff 172 2007-06-02 23:41 /usr/local/bin/ghc-6.7.20070601
> -rwxr-xr-x 1 root staff 144 2007-06-12 20:20 /usr/local/bin/ghc-6.7.20070612
>
> The worst problem that comes of this is a slow loss of disk space, but
> I don't think I'll ever be able to fill this 80G disk :) 
>   

...OK...and when you tell GHC to compile something, exactly which 
compiler does it run? o_O