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The default compiler on FreeBSD is set by default with -fno-common,
triggering loads of multiple definition errors at link time.
This is a temporary fix, we should instead force no-common and fix code
accordingly.

Triggers loads of macro redefined warnings

Android cross-compilation environment
Android ndk: android-ndk-r16b
Compiler: arm-linux-androideabi-clang

IPMT modifications
tcptarget.c, udptarget.c: Change old index(...) call to strchr(...)
tcpmt.c: Change getdtablesize() call to sysconf(_SC_OPEN_MAX)

Change to more understandable names
c to cycle
s to sock
sa to passive_sock

Stdout was not flushed which caused a problem when not using a
TTY, output was buffered and displayed all at once at the end of
a session.

Testing: check that the stats are printed every second when
running udpmt -Vr 10 localhost | less

message d'avertissement si c'est le cas.
udptarget : si la longueur de paquet reçue est inférieure à 4, affiche un
message et désactive le traitement des numéros de séquence.

Contrib. by Baptiste Jonglez : setting msg.msg_namelen to the right size, to support both IPv4 and IPv6.

Remove the call with an empty string in the first place.
bind_source more robust to empty parameters.

Changes the behaviour of the -S option which can take a full source
specification now instead of just a port number. This option now accepts a
value of the form [host][:port] where host can be an address or hostname and
port a numeric value or service name.
Replaces char[] srcportname with char* source and removes strncpy since getopt
optarg is a pointer into the original argv array.