Re: [gobo-eiffel-develop] NGROUPS_MAX

[Eric B. <er...@go...>]

Franck Arnaud wrote:
> hi,
> 
> I can't bootstrap the current repository, fails on compiling
> eif_group_in_list because my Linux does not have NGROUPS_MAX (or not in
> the expected place).

I guess it is supposed to be in limits.h.
Does it work if you add this include explicitly at the beginning
of file $GOBO/tool/gec/runtime/c/eif_file.c?

> It seems NGROUPS_MAX was changed to 65000 from 32 between Linux kernel
> releases so the hardcoded NGROUPS_MAX technique not very reliable as the
> value depend on C library on the compiling machine and real value on
> kernel.
> 
> I guess the clean way is to malloc () the structure with the value
> returned by getgroups (0, _) which returns the actual number of items
> without touching the output array. Some POSIX page recommends a sysconf
> call but the former seems simpler. 

The problem is that I cannot pass the array as argument because
it is not allocated yet. Sould I pass a dummy one, or can I pass
a null pointer?

-- 
Eric Bezault
mailto:er...@go...
http://www.gobosoft.com