can run in ghci but can't compile.
Hi, I can run the following program in the interpreter ghci but can't compile it. The program I am trying to compile is a simple copy using the lazy bytestrings. I have been working out exercises from Real World haskell and I was benchmarking this version which is supposed to be optimum. ,---- | import qualified System as S | import qualified Data.ByteString.Lazy as L | | main = do | [from, to ] <- S.getArgs | file <- L.readFile from | L.writeFile to file `---- While trying to compile this i get the following errors. ,---- | mitra@ravan:~/laptop/haskell/learn$ /opt/ghc-6.10.1/bin/ghc cp.hs | cp.o: In function `sB1_info': | (.text+0xab): undefined reference to `bytestringzm0zi9zi1zi4_DataziByteStringziLazzy_writeFile_closure' | cp.o: In function `sAW_info': | (.text+0xe1): undefined reference to `bytestringzm0zi9zi1zi4_DataziByteStringziLazzy_readFile_closure' | cp.o: In function `sB5_info': | (.text+0x30f): undefined reference to `__stginit_bytestringzm0zi9zi1zi4_DataziByteStringziLazzy_' | cp.o: In function `sB5_srt': | (.data+0x4): undefined reference to `bytestringzm0zi9zi1zi4_DataziByteStringziLazzy_readFile_closure' | cp.o: In function `sB5_srt': | (.data+0x8): undefined reference to `bytestringzm0zi9zi1zi4_DataziByteStringziLazzy_writeFile_closure' | collect2: ld returned 1 exit status | mitra@ravan:~/laptop/haskell/learn$ rm cp.o | mitra@ravan:~/laptop/haskell/learn$ /opt/ghc-6.10.1/bin/ghc cp.hs | cp.o: In function `sB0_info': | (.text+0xab): undefined reference to `bytestringzm0zi9zi1zi4_DataziByteStringziLazzy_writeFile_closure' | cp.o: In function `sAV_info': `---- But this program is not syntactically or otherwise flawed since I can run it under ghci. ,---- | mitra@ravan:~/laptop/haskell/learn$ /opt/ghc-6.10.1/bin/ghci | GHCi, version 6.10.1: http://www.haskell.org/ghc/ :? for help | Loading package ghc-prim ... linking ... done. | Loading package integer ... linking ... done. | Loading package base ... linking ... done. | Prelude> :l cp.hs | Ok, modules loaded: Main. | Prelude Main> :main /etc/passwd /tmp/xyz | Loading package bytestring-0.9.1.4 ... linking ... done. | Loading package unix-2.3.1.0 ... linking ... done. | Loading package filepath-1.1.0.1 ... linking ... done. | Loading package old-locale-1.0.0.1 ... linking ... done. | Loading package old-time-1.0.0.1 ... linking ... done. | Loading package directory-1.0.0.2 ... linking ... done. | Loading package process-1.0.1.0 ... linking ... done. | Loading package syb ... linking ... done. | Loading package array-0.2.0.0 ... linking ... done. | Loading package random-1.0.0.1 ... linking ... done. | Loading package haskell98 ... linking ... done. | Prelude Main> `---- Since I suspect that this might be a problem with the way I have installed gch-6.10.1 I will explain how I have installed it.
On 2009 Mar 30, at 13:12, Anand Mitra wrote:
,---- | mitra@ravan:~/laptop/haskell/learn$ /opt/ghc-6.10.1/bin/ghc cp.hs | cp.o: In function `sB1_info': | (.text+0xab): undefined reference to `bytestringzm0zi9zi1zi4_DataziByteStringziLazzy_writeFile_closure' | cp.o: In function `sAW_info':
Use "ghc --make". ghci does this automatically. -- brandon s. allbery [solaris,freebsd,perl,pugs,haskell] allbery@kf8nh.com system administrator [openafs,heimdal,too many hats] allbery@ece.cmu.edu electrical and computer engineering, carnegie mellon university KF8NH
That does the job, Thanks !! Just to understand what is happening under the hood I tried to resolve this to the exact steps. The problem I faced seems to be equivalent of missing a -L and -l in gcc. Looking at the man for ghc I did find it had the -l and -L flags. Now I had to find the path and the name of the library. Did a find over the location I have installed ghc I was able to short list the likely candidates. ,---- | find /opt/ghc-6.10.1/ -type f |grep \\.a$ | .... | /opt/ghc-6.10.1/lib/ghc-6.10.1/bytestring-0.9.1.4/libHSbytestring-0.9.1.4.a | /opt/ghc-6.10.1/lib/ghc-6.10.1/bytestring-0.9.1.4/libHSbytestring-0.9.1.4_p.a | .... `---- and as expected adding the -l and -L in the ghc command line does the trick. /opt/ghc-6.10.1/bin/ghc -L/opt/ghc-6.10.1/lib/ghc-6.10.1/bytestring-0.9.1.4/ -lHSbytestring-0.9.1.4 cp.hs regards -- Anand Mitra On Mon, Mar 30, 2009 at 10:45 PM, Brandon S. Allbery KF8NH < allbery@ece.cmu.edu> wrote:
On 2009 Mar 30, at 13:12, Anand Mitra wrote:
,---- | mitra@ravan:~/laptop/haskell/learn$ /opt/ghc-6.10.1/bin/ghc cp.hs | cp.o: In function `sB1_info': | (.text+0xab): undefined reference to `bytestringzm0zi9zi1zi4_DataziByteStringziLazzy_writeFile_closure' | cp.o: In function `sAW_info':
Use "ghc --make". ghci does this automatically.
-- brandon s. allbery [solaris,freebsd,perl,pugs,haskell] allbery@kf8nh.com system administrator [openafs,heimdal,too many hats] allbery@ece.cmu.edu electrical and computer engineering, carnegie mellon university KF8NH
Am Montag 30 März 2009 19:54:28 schrieb Anand Mitra:
That does the job, Thanks !!
Just to understand what is happening under the hood I tried to resolve this to the exact steps. The problem I faced seems to be equivalent of missing a -L and -l in gcc. Looking at the man for ghc I did find it had the -l and -L flags. Now I had to find the path and the name of the library. Did a find over the location I have installed ghc I was able to short list the likely candidates.
,----
| find /opt/ghc-6.10.1/ -type f |grep \\.a$ | ....
/opt/ghc-6.10.1/lib/ghc-6.10.1/bytestring-0.9.1.4/libHSbytestring-0.9.1.4.a
/opt/ghc-6.10.1/lib/ghc-6.10.1/bytestring-0.9.1.4/libHSbytestring-0.9.1.4_p .a
| ....
`----
and as expected adding the -l and -L in the ghc command line does the trick.
/opt/ghc-6.10.1/bin/ghc -L/opt/ghc-6.10.1/lib/ghc-6.10.1/bytestring-0.9.1.4/ -lHSbytestring-0.9.1.4 cp.hs
regards
Or, simpler: ghc -package bytestring -o anfile anand.hs but I strongly recommend using --make for every compilation unless you know that you really do *not* want it.
participants (3)
-
Anand Mitra -
Brandon S. Allbery KF8NH -
Daniel Fischer