On Thu, 2008-03-06 at 04:50 -0800, John Meacham wrote:
On Thu, Mar 06, 2008 at 12:41:56PM +0000, Duncan Coutts wrote:
c2hs has to read the header files on your system to be able to check any consistency.
I'm not sure why hsc2hs is the minimal tool. It relies on a C compiler where c2hs does not. What happens with Haskell implementations that do not bundle a C compiler (eg ghc in future on win32)?
Hmm... I am not quite sure how c2hs works then. like, how can it figure out the offsets of fields in data structures without knowing the field layout algorithm for a given architecture/os combo without invoking a c compiler?
It's calculated directly.
Though, if there were a way to figure that stuff out without a c compiler in a portable way, that would be cool.
It is specified by the platform C ABI. So it varies from one platform to another, but it is specified for most platforms, that's what allows you to link code compiled by different C compilers and have it work. Duncan