Re: GHCI and readline package

The instructions below refer to a slightly older version of mingw -- to have it work with the one that's bundled with 6.2.2, substitute "strcasecmp.o strncasecmp.o" for "string_old.o". --sigbjorn ----- Original Message ----- From: "Sigbjorn Finne" To: "Wassell, Mark P (GE Energy)" Cc: Sent: Monday, November 01, 2004 20:30 Subject: Re: GHCI and readline package

You can make 'readline' load with GHCi 6.2.2 with just a little bit of effort -- try the following:

# any old temporary working directory will do bash$ mkdir c:/tmp/hack bash$ cd c:/tmp/hack # assuming you've install 6.2.2 in c:/ghc/ghc-6.2.2 bash$ c:/ghc/ghc-6.2.2/bin/ar x \ c:/ghc/ghc-6.2.2/gcc-lib/libmoldname.a string_old.o bash$ c:/ghc/ghc-6.2.2/gcc-lib/ld --whole-archive \ -r -x -o readline.o c:/ghc/ghc-6.2.2/gcc-lib/libreadline.a \ string_old.o bash$ cp readline.o c:/ghc/ghc-6.2.2/ # you may now delete the temp dir.

Next, manually edit your c:/ghc/ghc-6.2.2/package.conf, editing the "readline" package's extra_libraries field to:

extra_libraries = ["readline", "advapi32"],

Save the changes & you should be ready to go.

--sigbjorn ----- Original Message ----- From: "Wassell, Mark P (GE Energy)" To: Sent: Monday, November 01, 2004 19:34 Subject: GHCI and readline package

...

Hi,

I'm having a problem running ghci and loading the readline package on WindowsXP. C:\Software\haskell\ghc622\bin>ghci -package readline ghci -package readline ___ ___ _ / _ \ /\ /\/ __(_) / /_\// /_/ / / | | GHC Interactive, version 6.2.2, for Haskell 98. / /_\\/ __ / /___| | http://www.haskell.org/ghc/ \____/\/ /_/\____/|_| Type :? for help.

Loading package base ... linking ... done. Loading package readline ... linking ... C:/Software/haskell/ghc622/HSreadline.o: unknown symbol `_rl_redisplay_function' ghc.exe: unable to load package `readline'

I have seen the follow in the user guide:

"For some reason, Mingw ships with the readline library, but not with the readline headers. As a result, GHC (like Hugs) does not use readline for interactive input on Windows. You can get a close simulation by using an emacs shell buffer!"

but I assume I need readline as util needs it and util is needed by data which is needed by wxcore.

Cheers

Mark

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