Checking if your kit is complete...
Looks good
Writing Makefile for Sys::Mmap
cp Mmap.pm blib/lib/Sys/Mmap.pm
/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 -typemap typemap  Mmap.xs > Mmap.xsc && mv Mmap.xsc Mmap.c
gcc -c   -D_REENTRANT -D_GNU_SOURCE -fno-strict-aliasing -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -O3   -DVERSION=\"0.13\" -DXS_VERSION=\"0.13\" -fpic "-I/home/cpanrun/build/5.8.0/lib/5.8.0/i686-linux-thread-multi/CORE"   Mmap.c
Mmap.xs:14: warning: `_POSIX_C_SOURCE' redefined
/usr/include/features.h:127: warning: this is the location of the previous definition
Running Mkbootstrap for Sys::Mmap ()
chmod 644 Mmap.bs
rm -f blib/arch/auto/Sys/Mmap/Mmap.so
LD_RUN_PATH="" gcc  -shared Mmap.o  -o blib/arch/auto/Sys/Mmap/Mmap.so     
chmod 755 blib/arch/auto/Sys/Mmap/Mmap.so
cp Mmap.bs blib/arch/auto/Sys/Mmap/Mmap.bs
chmod 644 blib/arch/auto/Sys/Mmap/Mmap.bs
Manifying blib/man3/Sys::Mmap.3
PERL_DL_NONLAZY=1 /home/cpanrun/tmp/5.8.0/bin/perl "-MExtUtils::Command::MM" "-e" "test_harness(0, 'blib/lib', 'blib/arch')" t/*.t
t/mmap....ok
All tests successful.
Files=1, Tests=2,  1 wallclock secs ( 0.30 cusr +  0.02 csys =  0.32 CPU)
Installing /home/cpanrun/build/5.8.0/lib/site_perl/5.8.0/i686-linux-thread-multi/auto/Sys/Mmap/Mmap.so
Installing /home/cpanrun/build/5.8.0/lib/site_perl/5.8.0/i686-linux-thread-multi/auto/Sys/Mmap/Mmap.bs
Installing /home/cpanrun/build/5.8.0/lib/site_perl/5.8.0/i686-linux-thread-multi/Sys/Mmap.pm
Installing /home/cpanrun/build/5.8.0/man/man3/Sys::Mmap.3
Appending installation info to /home/cpanrun/build/5.8.0/lib/5.8.0/i686-linux-thread-multi/perllocal.pod