[Haskell-cafe] HDBC-ODBC build/install problem.

[Bjorn Bringert]

On Jul 12, 2007, at 23:35 , Edward Ing wrote:

> Hi,
> I am trying to make HaskellDB work with HDBC-ODBC.
> I did builds of HDBC/HDBC-ODBC. But when I am building
> HaskellDB-HDBC-ODBC, I get the following message.
>
> --------------
> "[1 of 1] Compiling Database.HaskellDB.HDBC.ODBC (
> Database/HaskellDB/HDBC/ODBC.hs,
> dist\build/Database/HaskellDB/HDBC/ODBC.o )
> C:\Program Files\Haskell\HDBC-odbc-1.1.2.0\ghc-6.6.1/Database/HDBC/ 
> ODBC/Connection.hi
> Declaration for connectODBC:
>  Failed to load interface for `Database.HDBC.ODBC.ConnectionImpl':
>    Use -v to see a list of the files searched for.
> Cannot continue after interface file error"
> --------------
>
>> From this, I know the problem is the linkage between
> Database.HDBC.ODBC.Connection and Database.HDBC.ODBC.ConnectionImple.
> (Also I looked at the code to see the reference.)
>
> I did a little further investigation. I looked at the package registry
> area (C:\Program
> Files\Haskell\HDBC-odbc-1.1.2.0\ghc-6.6.1\Database\HDBC\ODBC) and
> notice that ConnectionImpl.hi is not there.
>
> I went back to the build directory and did find ConnectoinImpl.hi and
> ConnectionImpl.o.
> It seems like runghc Setup.hs install, did not install  
> ConnectionImpl.hi.
>
> I looked into the file named ".installed-pkg-config" and I saw this:
>
> ------------
> exposed-modules: Database.HDBC.ODBC
> hidden-modules: Database.HDBC.ODBC.Connection
>                Database.HDBC.ODBC.Statement Database.HDBC.ODBC.Types
>                Database.HDBC.ODBC.Utils Database.HDBC.ODBC.TypeConv
> import-dirs: "C:\\Program Files\\Haskell\\HDBC-odbc-1.1.2.0\ 
> \ghc-6.6.1"
> library-dirs: "C:\\Program Files\\Haskell\\HDBC-odbc-1.1.2.0\ 
> \ghc-6.6.1"
> hs-libraries: HSHDBC-odbc-1.1.2.0
> extra-libraries: odbc32
> --------------
>
> No mention of ConnectionImple.hi. It looks like the setup up script
> did not install ConnectionImpl.hi.
>
> Did ConnectionImpl.o get bound into "libHSHDBC-odbc-1.1.2.0.a" even
> though ConnectionImpl.hi did not get successfully installed?
>
> Does anyone know why the install target does not install
> ConnectionImpl.hi and how I can get around this problem?
>
> (Where is the odbc32 to be found anyways?)
>
>
> Here are a few things I did try which did NOT work:
>
> 1. Copy ConnectionImpl.hi over manually. HaskellDB-HDBC-ODBC builds,
> but at runtime there is a link error.
>
> 2. Manually alter ".installed-pkg-config" to add ConnectionImpl.hi as
> hidden module.
>
> Please comment on why these would not work ( I will learn from this.)
>
> Help would be appreciated.

Hi Edward,

the right approach would be to add it to other-modules in HDBC- 
odbc.cabal file, where it should have been all along. This is a bug  
in HDBC-odbc, I recommend that you send a patch to the maintainer.

Approach 1 doesn't work since that does not include the .o file in  
the installed .a archive.

Approach 2 doesn't work for several reasons, which exactly depend on  
what else you did, and which .installed-pkg-config file you changed.

/Björn