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Date: -- (:)
From: John Gerard Malecki <johnm@a...>
Subject: Re: [Caml-list] Camlidl and order of include files
Hi Dmitry,

I am satisfied with simply using 

  quote(h,"#include <unistd.h>")

Canlidl does not need to know the value of _SC_NPROCESSORS_ONLN only
that the type is (something like) an enum.

No need for a camlidl bug report but the manual could benefit from an
index of the keywords.

Thanks for you help.

Dmitry Bely wrote (2001-10-31T13:18:12+0300):
 > John Gerard Malecki <johnm@artisan.com> writes:
 > 
 > > I just tried camlidl and am not sure if I am using it wrong or if I
 > > have encountered a bug.  I want to access the (solaris) sysconf system
 > > routine to find out how many processors on a machine.  I wrote this
 > > idl file
 > > 
 > >   quote(C,"#include <unistd.h>")
 > >   
 > >   enum sysconf_names {
 > >     SC_NPROCESSOR_ONLN = _SC_NPROCESSORS_ONLN
 > >   };
 > 
 > 
 > Use quote(h,"#include <unistd.h>")
 > 
 > and then C stubs will compile, but your code still will be incorrect. How
 > the generated Caml part will know the value of _SC_NPROCESSORS_ONLN?
 > Obviously, it is not defined for Camlidl. It should generate an error
 > message here. It does not, and that's the bug in Camlidl (you can submit a
 > bug report). As for correct solution, you should either convert <unistd.h>
 > to IDL and then use
 > 
 > #include unistd.idl
 >    
 > enum sysconf_names {
 >    SC_NPROCESSOR_ONLN = _SC_NPROCESSORS_ONLN
 > };
 > 
 > or resolve _SC_NPROCESSORS_ONLN macro manually:
 > 
 > quote(C,"#include <unistd.h>")
 > 
 > enum sysconf_names {
 >    SC_NPROCESSOR_ONLN = 9
 > };
 > 
 > Hope to hear from you soon,
 > Dmitry
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