Use ghc --make. I heard that the newest version of ghc uses --make implicitely so you don't have to specify it, but I haven't actually experienced it myself yet. On Fri, May 13, 2011 at 1:35 AM, Christopher Howard wrote:

Hi. I'm very new to Haskell, but I'm trying to compile a simple program that uses HDBC with ODBC. I am working on an amd64 Gentoo Linux system. I've installed hdbc and hdbc-odbc with the unixOBDC bindings. So far, I created a small hello world type program. It doesn't use any HDBC functionality yet, but I inserted the following two lines at the top to see if I could compile correctly:

import Database.HDBC import Database.HDBC.ODBC

However, when I try to compile I get this:

$ ghc Main.hs Main.o: In function `s1cY_info': (.text+0x1ef): undefined reference to `__stginit_HDBCzmodbczm1zi1zi3zi0_DatabaseziHDBCziODBC_' Main.o: In function `s1cY_info': (.text+0x1fb): undefined reference to `__stginit_HDBCzm2zi2zi6zi1_DatabaseziHDBC_' collect2: ld returned 1 exit status

Though, these errors do not show up when I run the .hs file with runhaskell.

I'm guessing I just don't know how to link to the correct library or libraries. I tried adding -lodbc to the ghc line but that did not help. In /usr/lib I see libodbc.so, as well as the directories hdbc-1.1.3 and hdbc-odbc-1.1.3.0. I would appreciate any guidance.

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