Checking if your kit is complete...
Looks good
Writing Makefile for IO::Socket::Multicast
cp Multicast.pm blib/lib/IO/Socket/Multicast.pm
/export/home/cpanrun/build/5.6.1/bin/perl -I/export/home/cpanrun/build/5.6.1/lib/5.6.1/sun4-solaris-thread-multi -I/export/home/cpanrun/build/5.6.1/lib/5.6.1 /export/home/cpanrun/build/5.6.1/lib/5.6.1/ExtUtils/xsubpp  -typemap /export/home/cpanrun/build/5.6.1/lib/5.6.1/ExtUtils/typemap Multicast.xs > Multicast.xsc && mv Multicast.xsc Multicast.c
gcc -c  -DUSE_REENTRANT_API -D_POSIX_PTHREAD_SEMANTICS -D_REENTRANT -fno-strict-aliasing -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -O   -DVERSION=\"1.05\" -DXS_VERSION=\"1.05\" -fPIC -I/export/home/cpanrun/build/5.6.1/lib/5.6.1/sun4-solaris-thread-multi/CORE  Multicast.c
Running Mkbootstrap for IO::Socket::Multicast ()
chmod 644 Multicast.bs
rm -f blib/arch/auto/IO/Socket/Multicast/Multicast.so
LD_RUN_PATH="/usr/lib" gcc  -G Multicast.o  -o blib/arch/auto/IO/Socket/Multicast/Multicast.so   -lresolv  
chmod 755 blib/arch/auto/IO/Socket/Multicast/Multicast.so
cp Multicast.bs blib/arch/auto/IO/Socket/Multicast/Multicast.bs
chmod 644 blib/arch/auto/IO/Socket/Multicast/Multicast.bs
Manifying blib/man3/IO::Socket::Multicast.3
PERL_DL_NONLAZY=1 /export/home/cpanrun/build/5.6.1/bin/perl -Iblib/arch -Iblib/lib -I/export/home/cpanrun/build/5.6.1/lib/5.6.1/sun4-solaris-thread-multi -I/export/home/cpanrun/build/5.6.1/lib/5.6.1 test.pl
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Installing /export/home/cpanrun/build/5.6.1/lib/site_perl/5.6.1/sun4-solaris-thread-multi/auto/IO/Socket/Multicast/Multicast.so
Installing /export/home/cpanrun/build/5.6.1/lib/site_perl/5.6.1/sun4-solaris-thread-multi/auto/IO/Socket/Multicast/Multicast.bs
Installing /export/home/cpanrun/build/5.6.1/lib/site_perl/5.6.1/sun4-solaris-thread-multi/IO/Socket/Multicast.pm
Installing /export/home/cpanrun/build/5.6.1/man/man3/IO::Socket::Multicast.3
Appending installation info to /export/home/cpanrun/build/5.6.1/lib/5.6.1/sun4-solaris-thread-multi/perllocal.pod