On 5-sep-2007, at 9:01, Serge D. Mechveliani wrote:

Dear GHC users and developers,

there has occured a curious case with file name letters. One user has built the docon library application (in Haskell) on MacOS X 10.4 + ghc-6.6.1.

And making the test program has failed due to the presence of the file

linalg.hs

in the directory of the testing modules for DoCon. This file is not needed for this docon release, it is a reserve. I set its name in the lower case letters in order for GHC to ignore it.

I test DoCon only in Linux, and have not access to MacOS. Thanks to Christian Maeder , he noticed that MacOS ignores the letter case in the file names! When the commands cd demotest ghc ... --make Main

run on MacOS, ghc suddenly touches the file linalg.hs -- for some reason (and there also exists LinAlg in the library built).

All right, I shall readily fix this `bug'.

But out of curiosity, who's bug is this: of GHC, DoCon, or MacOS ? Is the file name letters a matter of Haskell-98 ? Do the GHC docs mention the question of the letter case in the file names?

Ouch, the well-known case-preserving but case-ignoring default behaviour of MacOS X's file system bites someone again. In short: Mac OS X's filesystem ignores case when opening a file, but preserves case when creating. Therefore, if you have a file linalg.hs and you wish to open LinAlg.hs then the file linalg.hs is going to be opened. Trying to create LinAlg.hs will fail, as linalg.hs already exists! Yes, this leads to stupid behaviour from time to time. The behaviour can be changed, but only on creation of the filesystem. WIth regards, Arthur. -- /\ / | arthurvl@cs.uu.nl | Work like you don't need the money /__\ / | A friend is someone with whom | Love like you have never been hurt / \/__ | you can dare to be yourself | Dance like there's nobody watching