[htoolkit-users] Hugs compatibility patch for HSQL/ODBC/HSQL.hsc

[Bjorn B. <d00...@dt...>]

I have attached a patch against the current CVS version of HSQL that
makes it possible to use HSQL in Hugs. The following things had to be 
changed to achieve compatibility with Hugs:

- Hugs does not seem to support the stdcall calling convention, so
stdcall was changed to ccall in all foreign declarations. Does this 
break things on Windows?

- Hugs does not have the Foreign.Concurrent module, so I changed
OSBC.HSQL.newEnvironment to use a function pointer to the C function 
SQLFreeEnv to create the ForeignPtr.

- Hugs does not derive instances of Typeable, so instance declarations
for Typeable SqlError was added.

I have also modified the build system to support Hugs. I have never 
worked with autoconf before, so my changes could be a little dodgy.

This patch requires at least Hugs-Nov2003 (older versions do for example
not support dynamic exceptions) and GHC 6.2 (older versions have a
non-standard argument order for newForeignPtr). I have only tested the 
ODBC module, and only under Linux, but at least they all compile.

Best regards,

Bjorn Bringert