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/build/5.6.1/bin/perl -I/home/cpanrun/build/5.6.1/lib/5.6.1/i686-linux-thread-multi -I/home/cpanrun/build/5.6.1/lib/5.6.1 /home/cpanrun/build/5.6.1/lib/5.6.1/ExtUtils/xsubpp  -typemap /home/cpanrun/build/5.6.1/lib/5.6.1/ExtUtils/typemap Combination.xs > Combination.xsc && mv Combination.xsc Combination.c
Please specify prototyping behavior for Combination.xs (see perlxs manual)
gcc -c  -DUSE_REENTRANT_API -D_GNU_SOURCE -D_REENTRANT -fno-strict-aliasing -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -O2   -DVERSION=\"0.01\" -DXS_VERSION=\"0.01\" -fpic -I/home/cpanrun/build/5.6.1/lib/5.6.1/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/build/5.6.1/bin/perl -Iblib/arch -Iblib/lib -I/home/cpanrun/build/5.6.1/lib/5.6.1/i686-linux-thread-multi -I/home/cpanrun/build/5.6.1/lib/5.6.1 test.pl
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Installing /home/cpanrun/build/5.6.1/lib/site_perl/5.6.1/i686-linux-thread-multi/auto/String/Combination/Combination.so
Installing /home/cpanrun/build/5.6.1/lib/site_perl/5.6.1/i686-linux-thread-multi/auto/String/Combination/Combination.bs
Installing /home/cpanrun/build/5.6.1/lib/site_perl/5.6.1/i686-linux-thread-multi/auto/String/Combination/autosplit.ix
Installing /home/cpanrun/build/5.6.1/lib/site_perl/5.6.1/i686-linux-thread-multi/String/Combination.pm
Installing /home/cpanrun/build/5.6.1/man/man3/String::Combination.3
Appending installation info to /home/cpanrun/build/5.6.1/lib/5.6.1/i686-linux-thread-multi/perllocal.pod