On Thu, 2005-11-03 at 09:49 +0100, Mirko Rahn wrote:

...

It prints n, rather than tak(3n,2n,n).

??? No:

*Main> :set args 0 *Main> main 0.0 *Main> :set args 1 *Main> main 2.0 *Main> :set args 2 *Main> main 3.0 *Main> :set args 3 *Main> main 6.0

The same with some versions of ghc.

Ah .. it seems to be a bug in gcc 4.0 The Glorious Glasgow Haskell Compilation System, version 6.4 [running on Ubuntu which uses Debian package] gcc (GCC) 4.0.2 20050808 (prerelease) (Ubuntu 4.0.1-4ubuntu9) x86_64 Summary: gcc does not work with GHC 6.4 on x86_64 with optimisation higher than -O1 Perhaps the Evil Mangler is not working, or, possibly the version isn't even registered. ---------------------------------------------- skaller@rosella:/work/felix/flx$ ghc -O3 -fvia-C -optc -O3 -o speed/exes/ghc/takfp speed/src/haskell/takfp.hs skaller@rosella:/work/felix/flx/speed/exes/ghc$ ./takfp 8 8.0 skaller@rosella:/work/felix/flx$ ghc -fvia-C -o speed/exes/ghc/takfp speed/src/haskell/takfp.hs skaller@rosella:/work/felix/flx$ speed/exes/ghc/takfp 8 9.0 skaller@rosella:/work/felix/flx$ speed/exes/ghc/takfp 3 6.0 skaller@rosella:/work/felix/flx$ ghc -O3 -fvia-C -optc -O2 -o speed/exes/ghc/takfp speed/src/haskell/takfp.hs skaller@rosella:/work/felix/flx$ speed/exes/ghc/takfp 3 3.0 skaller@rosella:/work/felix/flx$ ghc -O3 -fvia-C -optc -O1 -o speed/exes/ghc/takfp speed/src/haskell/takfp.hs skaller@rosella:/work/felix/flx$ speed/exes/ghc/takfp 3 6.0 -- John Skaller <skaller at users dot sf dot net> Felix, successor to C++: http://felix.sf.net