Checking if your kit is complete...
Looks good
Writing Makefile for String::Combination
cp Combination.pm blib/lib/String/Combination.pm
AutoSplitting blib/lib/String/Combination.pm (blib/lib/auto/String/Combination)
/home/cpanrun/tmp/5.8.0/bin/perl /home/cpanrun/build/5.8.0/lib/5.8.0/ExtUtils/xsubpp  -typemap /home/cpanrun/build/5.8.0/lib/5.8.0/ExtUtils/typemap  Combination.xs > Combination.xsc && mv Combination.xsc Combination.c
Please specify prototyping behavior for Combination.xs (see perlxs manual)
gcc -c   -D_REENTRANT -D_GNU_SOURCE -fno-strict-aliasing -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -O3   -DVERSION=\"0.01\" -DXS_VERSION=\"0.01\" -fpic "-I/home/cpanrun/build/5.8.0/lib/5.8.0/i686-linux-thread-multi/CORE"   Combination.c
Running Mkbootstrap for String::Combination ()
chmod 644 Combination.bs
rm -f blib/arch/auto/String/Combination/Combination.so
LD_RUN_PATH="" gcc  -shared Combination.o  -o blib/arch/auto/String/Combination/Combination.so     
chmod 755 blib/arch/auto/String/Combination/Combination.so
cp Combination.bs blib/arch/auto/String/Combination/Combination.bs
chmod 644 blib/arch/auto/String/Combination/Combination.bs
Manifying blib/man3/String::Combination.3
PERL_DL_NONLAZY=1 /home/cpanrun/tmp/5.8.0/bin/perl "-Iblib/lib" "-Iblib/arch" test.pl
1..1
ok 1
ok 2
ok 3
ok 4
ok 5
ok 6
ok 7
Installing /home/cpanrun/build/5.8.0/lib/site_perl/5.8.0/i686-linux-thread-multi/auto/String/Combination/Combination.so
Installing /home/cpanrun/build/5.8.0/lib/site_perl/5.8.0/i686-linux-thread-multi/auto/String/Combination/Combination.bs
Installing /home/cpanrun/build/5.8.0/lib/site_perl/5.8.0/i686-linux-thread-multi/auto/String/Combination/autosplit.ix
Installing /home/cpanrun/build/5.8.0/lib/site_perl/5.8.0/i686-linux-thread-multi/String/Combination.pm
Installing /home/cpanrun/build/5.8.0/man/man3/String::Combination.3
Appending installation info to /home/cpanrun/build/5.8.0/lib/5.8.0/i686-linux-thread-multi/perllocal.pod