Just a comment about changing limits of things. Just modifying
an include header may not be sufficient. For example, there could
be a data structure with info in it related to the value that
depends on the value. So, if there were a data structure for
NGROUPS_MAX info that had a bit for each group, there would be
problems just increasing the NGROUPS_MAX value. You also need
to fix the data structures/code that use it. This was illustrated
well a couple weeks back when someone wanted to change the maximum
number of files that could be open in a process.
That of course also applies to any application that uses the
structure.
-- Regards,Wes