I was assuming that regex would work properly with the latest Haskell Platform so I haven't attempted to re-install it. However as I mentioned above, attempting to compile a program that uses regex fails with linker errors on my Windows XP machine. Any ideas on how I can fix this problem? Kevin On Aug 17, 1:35 pm, Stephen Tetley wrote:

Hi Kevin

Are you trying to compile a program using regex-posix or compiling and installing an update of regex-posix (which is already in the Platform)?

If you are compiling a program that uses regex-posix, you shouldn't need to install other DLLs as the relevant libraries (.a and .o files) are distributed with the Platform.

For what its worth, Regex-posix worked fine with Platform 2009.2.0.2. I follow GHC releases rather than Platform ones, so I don't know about later versions.

Best wishes

Stephen _______________________________________________ Haskell-Cafe mailing list Haskell-C...@haskell.orghttp://www.haskell.org/mailman/listinfo/haskell-cafe

I'm running cabal install for the program that uses regex-compat. runhaskell doesn't work because compiling the code requires library information in the cabal file. I've also tried to run something similar using ghci on the same machine and it also fails with a similar error. Kevin On Aug 17, 1:54 pm, Stephen Tetley wrote:

On 17 August 2010 12:45, Kevin Jardine wrote:

...

I was assuming that regex would work properly with the latest Haskell Platform so I haven't attempted to re-install it.

Yes - its wise not to upgrade platform components, especially on Windows.

...

However as I mentioned above, attempting to compile a program that uses regex fails with linker errors on my Windows XP machine.

...

Any ideas on how I can fix this problem?

What command are you using for ghc?

With Platform 2009.2.0.2, I've tested a simple regex example with just / ghc --make ModuleName / - it compiled and ran under both MinGW and the Windows prompt.

Also does can you launch with runhaskell on the Main module? _______________________________________________ Haskell-Cafe mailing list Haskell-C...@haskell.orghttp://www.haskell.org/mailman/listinfo/haskell-cafe

ghci GHCi, version 6.12.3: http://www.haskell.org/ghc/ :? for help Loading package ghc-prim ... linking ... done. Loading package integer-gmp ... linking ... done. Loading package base ... linking ... done. Loading package ffi-1.0 ... linking ... done. Prelude> :mod Text.Regex.Posix Prelude Text.Regex.Posix> "hi" =~ "hi" :: Bool Loading package array-0.3.0.1 ... linking ... done. Loading package bytestring-0.9.1.7 ... linking ... done. Loading package containers-0.3.0.0 ... linking ... done. Loading package syb-0.1.0.2 ... linking ... done. Loading package base-3.0.3.2 ... linking ... done. Loading package mtl-1.1.0.2 ... linking ... done. Loading package regex-base-0.93.2 ... linking ... done. Loading package regex-posix-0.94.2 ... linking ... <interactive>: D: \PROGRA~1\HA SKEL~1\201020~1.0\lib\extralibs\regex-posix-0.94.2\ghc-6.12.3\HSregex-

No, it's my own code. But in ghci even the simplest =~ fails on my machine. Here's a complete transcript: posix-0.94 .2.o: unknown symbol `_regerror' : unable to load package `regex-posix-0.94.2' Prelude Text.Regex.Posix> On Aug 17, 2:05 pm, Stephen Tetley wrote:

Hi Kevin

Is it a library on Hackage? I'll take a look if the dependencies aren't too deep... _______________________________________________ Haskell-Cafe mailing list Haskell-C...@haskell.orghttp://www.haskell.org/mailman/listinfo/haskell-cafe

yep now I see it: http://trac.haskell.org/haskell-platform/ticket/137 Next time I'll check the bug tracker as well as Google before posting here! Thanks. Kevin On Aug 17, 2:37 pm, Stephen Tetley wrote:

Hi Kevin

I've just installed Platform-2010.2.0.0 and I'm getting the symbol error on the file that I could compile with Platform2009.2.0.2.

So I'd say it is a bug with the Platform, also it looks like the error was acknowledged on the Platform mailing list last week.

$ /c/ghc/HP/2010.2.0.0/bin/ghc --make OutlineGrep.lhs [1 of 1] Compiling Main             ( OutlineGrep.lhs, OutlineGrep.o ) Linking OutlineGrep.exe ... C:\ghc\HP\2010.2.0.0\lib\extralibs\regex-posix-0.94.2\ghc-6.12.3/libHSregex-posix-0.94.2.a(Wrap.o):f ake:(.text+0x493): undefined reference to `regerror' C:\ghc\HP\2010.2.0.0\lib\extralibs\regex-posix-0.94.2\ghc-6.12.3/libHSregex-posix-0.94.2.a(Wrap.o):f ake:(.text+0x4e7): undefined reference to `regerror'

etc. _______________________________________________ Haskell-Cafe mailing list Haskell-C...@haskell.orghttp://www.haskell.org/mailman/listinfo/haskell-cafe

On 17 August 2010 14:15, Kevin Jardine wrote: [snip]

So sorry for the waste of bandwidth.

No - its good to have a solution in public. The issue tracker seemed a bit inconclusive, but anyone reading an archive of the mailing list will now be able to pick up what to do.

I maintain the regex-posix package, so I feel the need for a quick post. I am glad the recent patch I accepted means the hackage version is working on Windows. If there is any additional things that need to be done with regex-* please let me know. Cheers, Chris. On 18/08/2010 06:38, Kevin Jardine wrote:

Mikhail and Don,

All I needed to do was to type:

cabal install regex-posix

and everything now works as expected.

As Mikhail also mentioned this problem is already in the Haskell Platform bug tracker.

Kevin

On Aug 18, 5:17 am, Don Stewart wrote:

...

kevinjardine:

...

I'm running Haskel Platform 2010.2.0.0 and attempting to compile with regex-compat under Windows XP.

...

The link stage fails with a number of lines of the form:

...

D:\Program Files\Haskell Platform\2010.2.0.0\lib\extralibs\regex- posix-0.94.2\ghc-6.12.3/libHSregex-posix-0.94.2.a(Wrap.o):fake:(.text +0x493): undefined reference to `regerror'

...

I have googled for a solution but cannot see a fix anywhere.

Looks like possibly missing regex.h header files (from the regex C library) On Windows?

-- Don _______________________________________________ Haskell-Cafe mailing list Haskell-C...@haskell.orghttp://www.haskell.org/mailman/listinfo/haskell-cafe