Thanks! I installed 6.8.2 binary and that successfully compiled 6.8.3 source with gcc 4.1.1. (I am still not sure why a direct 6.8.3. binary installation did not work for me, but now I think everything is good). Thanks very much again! Di, Yu 7.26 ----- Original Message ---- From: Simon Marlow To: Yu Di Cc: glasgow-haskell-users@haskell.org Sent: Friday, July 25, 2008 3:52:01 AM Subject: Re: ghc 6.8.3 build error with __DISCARD__ linking problem, please help! Yu Di wrote:

Hi, I am trying to build ghc 6.8.3 from source release, my currently installed version is ghc 6.4.2 (x86 linux binary release version), and I got:

/usr/local/ghc/bin/ghc -o ghc-pkg.bin -H16m -O -cpp -Wall -fno-warn-name-shadowing -fno-warn-unused-matches -DUSING_COMPAT -i../../compat -ignore-package Cabal -Rghc-timing -package unix -L../../compat -lghccompat Main.o Version.o CRT_noglob.o Main.o: In function `__stginit_ZCMain': ghc13533.hc:(.text+0x4): undefined reference to `__DISCARD__' ghc13533.hc:(.text+0x9): undefined reference to `__DISCARD__' Main.o: In function `__stginit_Main': ghc13533.hc:(.text+0x18): undefined reference to `__DISCARD__' ghc13533.hc:(.text+0x1d): undefined reference to `__DISCARD__' Main.o: In function `__stginit_Main_': ghc13533.hc:(.text+0x2c): undefined reference to `__DISCARD__' Main.o:ghc13533.hc:(.text+0x3d): more undefined references to `__DISCARD__' follow collect2: ld returned 1 exit status <>

Do you know how I can fix this problem? My ghc and gcc versions are:

The Glorious Glasgow Haskell Compilation System, version 6.4.2 gcc (GCC) 4.1.1 20060724 (prerelease) (4.1.1-4pclos2007)

(I also tried ghc 6.2.0 and gcc 3.3.6, but all combinations resulted in the same error message)

The error is coming from your installed 6.4.2, and I strongly suspect that it is incompatible with the gcc version you have installed. You could try downgrading gcc, but your best bet is to just install a recent GHC binary distribution. Cheers, Simon