Re: Getting Hugs to recognize new primitive functions

[Justin: Extraordinarily Lanky]

>[I'm not sure if this should be hugs-bugs or hugs-users - definitely a
>borderline case.  Replies should probably come to me or to hugs-bugs.]
>
>> I'm attempting to use green card generated code for a project
>> (why don't mutable arrays work?) 
>
>I wasn't aware they didn't.  In fact, I'm not even sure what you mean
>- can you give some more details.

The distribution of Hugs that I have came with a faulty ST.hs file.  
When I try to run it through the interpreter, I get an error on the 
line that reads:

primitive runST                        :: (forall s. ST s a) -> a

that says:

ERROR "/boot/home/config/share/hugs/lib/exts/ST.hs" (line 48): Syntax 
error in type expression (unexpected `.') 

Also, even when I attempt to fix the file so that this error goes away, 
it seems as though the STArray functions don't work (ie, attempting to 
alter an element of the array doesn't actually alter the array)

>> and I can't get any information on where to put the generated .so
>> file so that I can access the functions I have generated.
>
>I can't remember if this is documented anywhere (it certainly should 
be).
>
>1) GreenCard generates a .hs and a .c file which you compile/link to 
get
>   a .so file.
>
>2) Place both files in the same directory and put that directory on 
Hugs'
>   path so that when you say "import Foo" or ":load Foo", Hugs will 
find
>   the .hs file and, from that, know where the .so file is (i.e., in 
the
>   same directory).
>
>Putting them in the same directory is an easy way of (virtually)
>eliminating version skew.  My mental model is that they are a single
>_logical_ file which is split into two because of technical
>restrictions in Unix and Win32.

following your instructions, I still get the error:

ERROR "/boot/home/Applications/gc-2.01/lib/hugs/StdDIS.hs": Unable to 
load GreenCard primitives

now, I have not divulged all the information involving my problem ... I 
wanted to see if I could get some real help before I cracked ...

I'm actually trying to get this to run on BeOS.  I've got hugs compiled 
and running (as it has been for months) and I'm now trying to extend my 
use of Haskell by using GC.  The trouble here is that gcc -shared does 
not work.  Is it possible that the .SO files generated on Be are not 
compatible with Hugs?  And before you're quick to say "No way!", bear 
in mind that the binary format of Be is ELF ... just like linux (for 
which I'm sure you have many happy GC users).

Looking forward to any more help you might be able to give me.
-Justin