Hi Mario,

I have an (old) AIX system (and old Perl), but I could not get anything from your command. Perl for AIX:

$perl -v

This is perl, v5.10.1 (*) built for ppc-aix-thread-multi

Copyright 1987-2009, Larry Wall

Perl may be copied only under the terms of either the Artistic License
+ or the
GNU General Public License, which may be found in the Perl 5 source ki
+t.

Complete documentation for Perl, including FAQ lists, should be found 
+on
this system using "man perl" or "perldoc perl".  If you have access to
+ the
Internet, point your browser at http://www.perl.org/, the Perl Home Pa
+ge.
[download]

Your command:

perl -e '
>  require "sys/syscall.ph";
> print "SYS_sendmsg: ", SYS_sendmsg(), "\n";
> print "SYS_recvmsg: ", SYS_recvmsg(), "\n";
> '
Can't locate sys/syscall.ph in @INC (@INC contains: /opt/freeware/lib/
+perl5/5.10.1/ppc-aix-thread-multi /opt/freeware/lib/perl5/5.10.1 /opt
+/freeware/lib/perl5/site_perl/5.10.1/ppc-aix-thread-multi /opt/freewa
+re/lib/perl5/site_perl/5.10.1 .) at -e line 2.
22:31:14|prod@op66idb1[/exec/applis/prod/MDSP_LOG]$
[download]

Hmm, not sure I ran the command you really needed. Please let me know if I can help you better.

Cheers,

Laurent.