Derrick J Brashear <[EMAIL PROTECTED]> writes:

> Heimdal's libkafs actually has some syscall probing code which is
> license-compatible, but it's userspace: it probes to see if our system
> call is installed.

Syscall probing on AIX requires building a separate dynamic object and
attempting a dlopen equivalent at runtime, which is the part of the
libkafs code that's particularly scary.  Other platforms require at most
messing with signal handlers.

-- 
Russ Allbery ([EMAIL PROTECTED])             <http://www.eyrie.org/~eagle/>
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