[Haskell-cafe] no time profiling on my MacBookPro8,1

[Nicolas Frisby]

Whoops: I'm running Haskell Platform 2011.2.0.1.

OS X 10.6.7

i686-apple-darwin10-gcc-4.2.1 (GCC) 4.2.1 (Apple Inc. build 5664) (if
that matters?) Out of my depth here.

On Fri, May 6, 2011 at 5:07 PM, Nicolas Frisby <nicolas.frisby at gmail.com> wrote:
> For this vanilla program
>
>> module Main where
>>
>> main = print $ fib 40
>>
>> fib 0 = 1
>> fib 1 = 1
>> fib n = fib (n - 1) + fib (n - 2)
>
> with these commands
>
> $ ghc -prof -auto-all -rtsopts -O --make Main.hs -o Main
> $ ./Main +RTS -p
>
> all of the %time cells in the generated Main.prof file are 0.0, as is
> the total time count (0.00 secs and 0 ticks). The %alloc cells seem
> normal.
>
> Andy Gill noticed that if you compile with -threaded, the %time cells
> seem normal.
>
> I scanned the GHC Trac tickets specific to Mac OS X, but saw no titles
> that looked similar. Is this a known issue?
>
> Thanks.
>