On Fri, Mar 07, 2008 at 03:04:46AM +0000, Duncan Coutts wrote:
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.
Yeah, I was thinking about a potentially unknown platform, so you can distribute portable code that is only localized when it is finally compiled for the given platform. Though, I should look at that code for calculating the offsets in c2hs, those could come in handy. I have some code in jhc to take a generic jhc library and specialize it for a given architecture, adding the ability to figure out structure offsets would be useful too. The idea is that to install a jhc library all you need to do is grab a single 'hl' file and drop it somewhere, but you can optionally re-optimize it specifically for your platform, (presumably after pulling it down from the web or hackage or somewhere..) John -- John Meacham - ⑆repetae.net⑆john⑈